Parameter Groups
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# National Water Information System
# 2024/11/21
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# Date Retrieved: USGS Water Data for the Nation Help System
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parm_cd group parm_nm epa_equivalence result_statistical_basis result_time_basis result_weight_basis result_particle_size_basis result_sample_fraction result_temperature_basis CASRN SRSName parm_unit
5s 8s 158s 26s 0s 0s 3s 14s 12s 0s 10s 60s 10s
00600 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, unfiltered, milligrams per liter Agree Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l
00601 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], suspended sediment, total, milligrams per liter Not checked Suspended Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l
00602 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, filtered, milligrams per liter Agree Dissolved Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l
00603 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], bed sediment, total, dry weight, milligrams per kilogram Agree Dry Bed Sediment Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/kg
00604 Nutrient Ammonia (NH3 + NH4+), suspended sediment, total, milligrams per liter as nitrogen Agree Suspended Ammonia and ammonium mg/l as N
00605 Nutrient Organic nitrogen, water, unfiltered, milligrams per liter as nitrogen Agree Total Organic nitrogen mg/l
00606 Nutrient Organic nitrogen, suspended sediment, total, milligrams per liter as nitrogen Agree Suspended Organic nitrogen mg/l
00607 Nutrient Organic nitrogen, water, filtered, milligrams per liter as nitrogen Agree Dissolved Organic nitrogen mg/l
00608 Nutrient Ammonia (NH3 + NH4+), water, filtered, milligrams per liter as nitrogen Agree Dissolved Ammonia and ammonium mg/l as N
00610 Nutrient Ammonia (NH3 + NH4+), water, unfiltered, milligrams per liter as nitrogen Agree Total Ammonia and ammonium mg/l as N
00611 Nutrient Ammonia (NH3 + NH4+), bed sediment, total, dry weight, milligrams per kilogram as nitrogen Agree Dry Bed Sediment Ammonia and ammonium mg/kg as N
00613 Nutrient Nitrite, water, filtered, milligrams per liter as nitrogen Agree Dissolved 14797-65-0 Nitrite mg/l as N
00615 Nutrient Nitrite, water, unfiltered, milligrams per liter as nitrogen Agree Total 14797-65-0 Nitrite mg/l as N
00616 Nutrient Nitrite, bed sediment, total, dry weight, milligrams per kilogram as nitrogen Agree Dry Bed Sediment 14797-65-0 Nitrite mg/kg as N
00618 Nutrient Nitrate, water, filtered, milligrams per liter as nitrogen Agree Dissolved 14797-55-8 Nitrate mg/l as N
00619 Nutrient Ammonia (un-ionized), water, unfiltered, calculated, milligrams per liter as nitrogen Not checked Total 7664-41-7 Ammonia mg/l as N
00620 Nutrient Nitrate, water, unfiltered, milligrams per liter as nitrogen Agree Total 14797-55-8 Nitrate mg/l as N
00621 Nutrient Nitrate, bed sediment, total, dry weight, milligrams per kilogram as nitrogen Agree Dry Bed Sediment 14797-55-8 Nitrate mg/kg as N
00623 Nutrient Ammonia plus organic nitrogen, water, filtered, milligrams per liter as nitrogen Agree Dissolved Kjeldahl nitrogen mg/l as N
00624 Nutrient Ammonia plus organic nitrogen, suspended sediment, total, milligrams per liter as nitrogen Agree Suspended Kjeldahl nitrogen mg/l as N
00625 Nutrient Ammonia plus organic nitrogen, water, unfiltered, milligrams per liter as nitrogen Agree Total Kjeldahl nitrogen mg/l as N
00626 Nutrient Ammonia plus organic nitrogen, bed sediment, total, dry weight, milligrams per kilogram as nitrogen Not agree Dry Bed Sediment Kjeldahl nitrogen mg/kg as N
00628 Nutrient Nitrate plus nitrite, suspended sediment, total, milligrams per liter as nitrogen Agree Suspended Inorganic nitrogen (nitrate and nitrite) mg/l as N
00630 Nutrient Nitrate plus nitrite, water, unfiltered, milligrams per liter as nitrogen Agree Total Inorganic nitrogen (nitrate and nitrite) mg/l as N
00631 Nutrient Nitrate plus nitrite, water, filtered, milligrams per liter as nitrogen Agree Dissolved Inorganic nitrogen (nitrate and nitrite) mg/l as N
00633 Nutrient Nitrate plus nitrite, bed sediment, total, dry weight, milligrams per kilogram as nitrogen Agree Dry Bed Sediment Inorganic nitrogen (nitrate and nitrite) mg/kg as N
00635 Nutrient Ammonia plus organic nitrogen, water, unfiltered, milligrams per liter as nitrogen Agree Total Kjeldahl nitrogen mg/l as N
00636 Nutrient Ammonia plus organic nitrogen, water, filtered, milligrams per liter as nitrogen Agree Dissolved Kjeldahl nitrogen mg/l as N
00639 Nutrient Albuminoid nitrogen, water, unfiltered, milligrams per liter as nitrogen Agree Total mg/l as N
00650 Nutrient Phosphate, water, unfiltered, milligrams per liter as PO4 Agree Total Phosphate-phosphorus mg/l
00653 Nutrient Phosphate, water, filtered, milligrams per liter as PO4 Agree Dissolved Phosphate-phosphorus mg/l
00660 Nutrient Orthophosphate, water, filtered, milligrams per liter as PO4 Not checked Dissolved 14265-44-2 Phosphate mg/l asPO4
00662 Nutrient Phosphorus, water, unfiltered, recoverable, micrograms per liter as phosphorus Agree Recoverable 7723-14-0 ug/l as P
00665 Nutrient Phosphorus, water, unfiltered, milligrams per liter as phosphorus Agree Total 7723-14-0 Phosphorus mg/l as P
00666 Nutrient Phosphorus, water, filtered, milligrams per liter as phosphorus Agree Dissolved 7723-14-0 Phosphorus mg/l as P
00667 Nutrient Phosphorus, suspended sediment, total, milligrams per liter as phosphorus Agree Suspended 7723-14-0 Phosphorus mg/l as P
00668 Nutrient Phosphorus, bed sediment, total, dry weight, milligrams per kilogram as phosphorus Agree Dry Bed Sediment 7723-14-0 Phosphorus mg/kg as P
00669 Nutrient Hydrolyzable phosphorus, water, unfiltered, milligrams per liter as phosphorus Agree Total mg/l as P
00670 Nutrient Organic phosphorus, water, unfiltered, milligrams per liter as phosphorus Agree Total Organic phosphorus mg/l as P
00671 Nutrient Orthophosphate, water, filtered, milligrams per liter as phosphorus Agree Dissolved 14265-44-2 Phosphate mg/l as P
00672 Nutrient Hydrolyzable phosphorus, water, filtered, milligrams per liter as phosphorus Agree Dissolved mg/l as P
00673 Nutrient Organic phosphorus, water, filtered, milligrams per liter as phosphorus Agree Dissolved Organic phosphorus mg/l as P
00674 Nutrient Orthophosphate, suspended sediment, total, milligrams per liter as phosphorus Agree Suspended 14265-44-2 Phosphate mg/l as P
00675 Nutrient Hydrolyzable phosphorus, suspended sediment, total, milligrams per liter as phosphorus Agree Suspended mg/l as P
00676 Nutrient Organic phosphorus, suspended sediment, total, milligrams per liter as phosphorus Agree Suspended Organic phosphorus mg/l as P
00677 Nutrient Hydrolyzable phosphorus plus orthophosphate, water, filtered, milligrams per liter as phosphorus Agree Dissolved mg/l as P
00678 Nutrient Hydrolyzable phosphorus plus orthophosphate, water, unfiltered, milligrams per liter as phosphorus Agree Total mg/l as P
01072 Nutrient Phosphorus, water, filtered, micrograms per liter as phosphorus Agree Dissolved 7723-14-0 ug/l
01388 Nutrient Phosphorus, bed sediment, total digestion, dry weight, milligrams per kilogram as phosphorus USGS use and no use by EPA Dry Bed Sediment 7723-14-0 Phosphorus mg/kg
01397 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], bed sediment, total digestion, dry weight, percent USGS use and no use by EPA Dry Bed Sediment Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
01413 Nutrient Phosphorus, soil, total digestion, dry weight, milligrams per kilogram as phosphorus USGS use and no use by EPA Dry Total 7723-14-0 Phosphorus mg/kg
01425 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], soil, total digestion, milligrams per liter USGS use and no use by EPA Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l
01434 Nutrient Phosphorus, bed sediment smaller than 2 millimeters, wet sieved (native water), total digestion, dry weight, milligrams per kilogram as phosphorus USGS use and no use by EPA Dry < 2 mm Bed Sediment 7723-14-0 Phosphorus mg/kg
01453 Nutrient Phosphorus, biota, tissue, total digestion, dry weight, percent Not checked Dry 7723-14-0 Phosphorus %
01465 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], biota, tissue, total, milligrams per liter as nitrogen Not checked Dry Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l
01470 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], suspended sediment, total, dry weight, percent Not checked Dry Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
01471 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], soil, total, dry weight, percent Not checked Dry Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
01472 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], biota, tissue, total, dry weight, percent Not checked Dry Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
01473 Nutrient Phosphorus, suspended sediment, total digestion, dry weight, milligrams per kilogram as phosphorus Not checked Dry Suspended 7723-14-0 Phosphorus mg/kg
03946 Nutrient Phosphorus, bed sediment smaller than 62.5 microns, wet sieved, laboratory, total digestion, dry weight, milligrams per kilogram as phosphorus Not checked Dry < 0.0625 Bed Sediment 7723-14-0 Phosphorus mg/kg
03953 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], bed sediment smaller than 62.5 microns, wet sieved, laboratory, total digestion, dry weight, percent Not checked Dry < 0.0625 Bed Sediment Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
30291 Nutrient Phosphorus, bed sediment, dry weight, percent Agree Dry Bed Sediment 7723-14-0 Phosphorus %
30292 Nutrient Phosphorus, suspended sediment, total digestion, dry weight, percent Not checked Dry Suspended 7723-14-0 Phosphorus %
30387 Nutrient Nitrate, soil, recoverable, dry weight, milligrams per kilogram as nitrogen Not checked Dry Recoverable 14797-55-8 mg/kg as N
30388 Nutrient Nitrate plus nitrite, soil, recoverable, dry weight, milligrams per kilogram as nitrogen Not checked Dry Recoverable Inorganic nitrogen (nitrate and nitrite) mg/kg as N
30389 Nutrient Nitrite, soil, recoverable, dry weight, milligrams per kilogram as nitrogen Not checked Dry Recoverable 14797-65-0 mg/kg as N
34935 Nutrient Phosphorus, bed sediment smaller than 62.5 microns, wet sieved, field, total digestion, dry weight, percent Not checked Dry < 62.5 microns Bed Sediment 7723-14-0 Phosphorus %
34936 Nutrient Phosphorus, bed sediment smaller than 177 microns, wet sieved, field, total digestion, dry weight, percent Not checked Dry < 177 microns Bed Sediment 7723-14-0 Phosphorus %
34937 Nutrient Phosphorus, bed sediment smaller than 62.5 microns, dry sieved, laboratory, total digestion, dry weight, percent Not checked Dry < 62.5 microns Bed Sediment 7723-14-0 Phosphorus %
34938 Nutrient Phosphorus, suspended sediment smaller than 62.5 microns, total digestion, dry weight, percent Not checked Dry < 62.5 microns Suspended 7723-14-0 Phosphorus %
34939 Nutrient Phosphorus, suspended sediment larger than 62.5 microns, total digestion, dry weight, percent Not checked Dry > 62.5 microns Suspended 7723-14-0 Phosphorus %
35052 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], bed sediment smaller than 62.5 micrometers, dry sieved, laboratory, total, dry weight, percent USGS use and no use by EPA Dry < 62.5 microns Bed Sediment Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
35055 Nutrient Phosphorus, bed sediment smaller than 62.5 micrometers, dry sieved, laboratory, total digestion, dry weight, milligrams per kilogram as phosphorus USGS use and no use by EPA Dry < 62.5 microns Bed Sediment 7723-14-0 Phosphorus mg/kg
49567 Nutrient Particulate phosphorus, suspended in water, milligrams per liter Not checked Suspended 7723-14-0 mg/l
49568 Nutrient Particulate inorganic phosphorus, suspended in water, 0.7 micron glass fiber filter, milligrams per liter Not checked Suspended Inorganic phosphorus mg/l
49570 Nutrient Particulate nitrogen, suspended in water, milligrams per liter Not checked Suspended 7727-37-9 Nitrogen mg/l
51131 Nutrient Orthophosphate, water, unfiltered, recoverable, milligrams per liter as phosphate Not checked Total 14265-44-2 Phosphate mg/l
51185 Nutrient Nitrate, water, unfiltered, field, milligrams per liter Not checked Total 14797-55-8 Nitrate mg/l
51186 Nutrient Inorganic nitrogen, water, dissolved, calculated as NH3+NO2+NO3, milligrams per liter as nitrogen Not checked Dissolved Inorganic nitrogen (nitrate and nitrite and ammonia) mg/l as N
51187 Nutrient Inorganic nitrogen, water, dissolved, calculated as NH3+NO2+NO3, short tons per day as nitrogen Not checked Dissolved Inorganic nitrogen (nitrate and nitrite and ammonia) ton/d as N
51288 Nutrient Orthophosphate, water, filtered, field, milligrams per liter as phosphorus Not checked Dissolved 14265-44-2 mg/l as P
51289 Nutrient Orthophosphate, water, in situ, milligrams per liter as phosphorus Not checked Total 14265-44-2 mg/l as P
51290 Nutrient Nitrate, water, in situ, milligrams per liter as nitrate Not checked Total 14797-55-8 mg/l
51386 Nutrient Phosphorus, bed sediment smaller than 150 um, dry sieved, lab, total digestion, dry weight, percent Not checked Dry <150 um Bed Sediment 7723-14-0 %
52140 Nutrient Nitrate plus nitrite, bed sediment <63 microns, dry weight, milligrams per kilogram as nitrogen Not checked Dry < 0.063 Bed Sediment mg/kg as N
52141 Nutrient Ammonia (NH3 + NH4+), soil, dry weight, milligrams per kilogram as nitrogen Not checked Dry mg/kg as N
52151 Nutrient Ammonia plus organic nitrogen, bed sediment smaller than 63 microns, wet sieved (native water), recoverable, dry weight, milligrams per kilogram as nitrogen Not checked Dry < 0.063 Bed Sediment mg/kg as N
52152 Nutrient Nitrate, bed sediment, total, dry weight, milligrams per kilogram as nitrate Not checked Dry Bed Sediment 14797-55-8 mg/kg
52153 Nutrient Nitrite, bed sediment, total, dry weight, milligrams per kilogram as nitrite Not checked Dry Bed Sediment 14797-65-0 mg/kg
52154 Nutrient Orthophosphate, bed sediment, recoverable, dry weight, milligrams per kilogram as PO4 Not checked Dry Bed Sediment 14265-44-2 mg/kg
52155 Nutrient Ammonia (NH3 + NH4+), bed sediment, total, dry weight, milligrams per kilogram as NH3 Not checked Dry Bed Sediment mg/kg
52156 Nutrient Ammonia plus organic nitrogen, bed sediment, total, dry weight, milligrams per kilogram Not checked Dry Bed Sediment mg/kg
52314 Nutrient Phosphates (orthophosphate plus condensed and polyphosphates), water, unfiltered, milligrams per liter as PO4 Not checked Total mg/l
52315 Nutrient Phosphates (orthophosphate plus condensed and polyphosphates), water, filtered, milligrams per liter as PO4 Not checked Dissolved mg/l
52360 Nutrient Phosphorus, bed sediment smaller than 250 microns, dry sieved, laboratory, total digestion, dry weight, milligrams per kilogram Not checked Dry < 2 mm Bed Sediment 7723-14-0 mg/kg
52361 Nutrient Phosphorus, bed sediment smaller than 2 millimeters, dry sieved, laboratory, total digestion, dry weight, milligrams per kilogram Not checked Dry < 2 mm Bed Sediment 7723-14-0 mg/kg
52527 Nutrient Phosphorus, water, unfiltered, micrograms per liter as phosphorus Not checked Total 7723-14-0 ug/l
52626 Nutrient Phosphorus, soil, total, dry weight, milligrams per kilogram as phosphorus Not checked Dry Total 7723-14-0 mg/kg as P
52627 Nutrient Phosphorus, solids, total, dry weight, milligrams per kilogram as phosphorus Not checked Dry Total 7723-14-0 mg/kg as P
52633 Nutrient Orthophosphate, bed sediment, total, dry weight, milligrams per kilogram as PO4 Not checked Dry Bed Sediment 14265-44-2 mg/kg PO4
52634 Nutrient Orthophosphate, solids, total, dry weight, milligrams per kilogram as PO4 Not checked 14265-44-2 mg/kg PO4
52635 Nutrient Phosphorus, water, unfiltered, milligrams per liter as phosphorus Not checked Total 7723-14-0 mg/l as P
52760 Nutrient Organic nitrogen, soil, recoverable, dry weight, percent Not checked Dry Recoverable %
53573 Nutrient Inorganic nitrogen, water, unfiltered, calculated as NH3+NO2+NO3, milligrams per liter as nitrogen Not checked Total mg/l as N
53665 Nutrient Phosphorus, bed sediment, recoverable, dry weight, milligrams per kilogram as phosphorus Not checked Dry Bed Sediment 7723-14-0 mg/kg as P
53706 Nutrient Phosphorus, bed sediment, 0.25 M hydroxylamine hydrochloride acid extracted, recoverable, dry weight, milligrams per kilogram as phosphorus Not checked Dry Bed Sediment 7723-14-0 mg/kg as P
61048 Nutrient Phosphorus, bed sediment smaller than 2 millimeters, total digestion, dry weight, percent Not checked Dry < 2 mm Bed Sediment 7723-14-0 Phosphorus %
62464 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], bed sediment, dry weight, percent USGS use and no use by EPA Dry Bed Sediment Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) % by wt
62845 Nutrient Total nitrogen, suspended sediment, dry weight, percent USGS use and no use by EPA Dry Suspended Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
62854 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, filtered, analytically determined, milligrams per liter USGS use and no use by EPA Dissolved Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l
62855 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, unfiltered, analytically determined, milligrams per liter USGS use and no use by EPA Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l
62953 Nutrient Nitrate, solids, dry weight, milligrams per kilogram as nitrogen USGS use and no use by EPA Dry 14797-55-8 Nitrate mg/kg as N
62954 Nutrient Nitrite, solids, dry weight, milligrams per kilogram as nitrogen USGS use and no use by EPA Dry 14797-65-0 Nitrite mg/kg as N
62961 Nutrient Ammonia (NH3 + NH4+), water, dissolved, pounds per day as nitrogen USGS use and no use by EPA Dissolved Ammonia and ammonium lb/d as N
63508 Nutrient Organic nitrogen, biota, tissue, dry weight, percent USGS use and no use by EPA Dry Organic nitrogen %
63509 Nutrient Organic nitrogen, suspended sediment, dry weight, percent USGS use and no use by EPA Dry Suspended Organic nitrogen %
63510 Nutrient Organic nitrogen, bed sediment, dry weight, percent USGS use and no use by EPA Dry Bed Sediment Organic nitrogen %
63517 Nutrient Organic carbon/organic nitrogen ratio, suspended sediment, atomic percent USGS use and no use by EPA Suspended %
63715 Nutrient Orthophosphate, solids, recoverable, dry weight, milligrams per kilogram USGS use and no use by EPA Dry Recoverable 14265-44-2 Phosphate mg/kg
64832 Nutrient Nitrate, water, filtered, micrograms per liter as nitrogen USGS use and no use by EPA Dissolved 14797-55-8 Nitrate ug/L as N
64834 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], solids, dry weight, mass fraction, percent USGS use and no use by EPA Dry Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) %
65175 Nutrient Phosphorus, bed sediment smaller than 62.5 microns, wet sieved, field, total digestion, dry weight, milligrams per kilogram as phosphorus USGS use and no use by EPA Dry < 62.5 microns Bed Sediment 7723-14-0 Phosphorus mg/kg
67918 Nutrient Phosphorus, solids, total digestion, dry weight, percent USGS use and no use by EPA Dry Total 7723-14-0 %
68073 Nutrient White phosphorus, solids, recoverable, milligrams per kilogram USGS use and no use by EPA Dry 12185-10-3 mg/kg
68075 Nutrient Phosphorus, solids, recoverable, dry weight, milligrams per kilogram as phosphorus USGS use and no use by EPA Dry 7723-14-0 mg/kg
70378 Nutrient Nitrate plus nitrite yield, computed by regression equation, pounds per day per square mile Not checked Inorganic nitrogen (nitrate and nitrite) lb/day/mi2
70379 Nutrient Nitrate plus nitrite yield, computed by regression equation, kilograms per day per square kilometer Not checked Inorganic nitrogen (nitrate and nitrite) kg/day/km2
70380 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N] yield, computed by regression equation, pounds per day per square mile Not checked Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) lb/day/mi2
70381 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N] yield, computed by regression equation, kilograms per day per square kilometer Not checked Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) kg/day/km2
70382 Nutrient Phosphorus yield, computed by regression equation, pounds per day per square mile Not checked 7723-14-0 Phosphorus lb/day/mi2
70383 Nutrient Phosphorus yield, computed by regression equation, kilograms per day per square kilometer Not checked 7723-14-0 Phosphorus kg/day/km2
70507 Nutrient Orthophosphate, water, unfiltered, milligrams per liter as phosphorus Agree Total 14265-44-2 Phosphate mg/l as P
71845 Nutrient Ammonia (NH3 + NH4+), water, unfiltered, milligrams per liter as NH4 Agree Total Ammonia and ammonium mg/l NH4
71846 Nutrient Ammonia (NH3 + NH4+), water, filtered, milligrams per liter as NH4 Agree Dissolved Ammonia and ammonium mg/l NH4
71850 Nutrient Nitrate, water, unfiltered, milligrams per liter as nitrate Agree Total 14797-55-8 Nitrate mg/l asNO3
71851 Nutrient Nitrate, water, filtered, milligrams per liter as nitrate Agree Dissolved 14797-55-8 Nitrate mg/l asNO3
71855 Nutrient Nitrite, water, unfiltered, milligrams per liter as nitrite Agree Total 14797-65-0 Nitrite mg/l asNO2
71856 Nutrient Nitrite, water, filtered, milligrams per liter as nitrite Agree Dissolved 14797-65-0 Nitrite mg/l asNO2
71886 Nutrient Phosphorus, water, unfiltered, milligrams per liter as PO4 Agree Total 7723-14-0 Phosphorus mg/l PO4
71887 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, unfiltered, milligrams per liter as nitrate Not checked Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l NO3
71888 Nutrient Phosphorus, water, filtered, milligrams per liter as PO4 Not checked Dissolved 7723-14-0 Phosphorus mg/l PO4
72399 Nutrient Phosphorus flux, water, in situ, computed by regression equation, kilograms per day as phosphorus Not checked Total 7723-14-0 Phosphorus kg/d as P
76008 Nutrient Nitrate, suspended sediment, total, milligrams per liter as nitrogen Not checked Suspended 14797-55-8 Nitrate mg/l as N
76009 Nutrient Nitrite, suspended sediment, total, milligrams per liter as nitrogen Not checked Suspended 14797-65-0 Nitrite mg/l as N
80111 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], solids, dry weight, milligrams per kilogram as nitrogen Agree Dry Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/kg
81206 Nutrient Phosphorus, water, dissolved, pounds per day as phosphorus Not checked Dissolved 7723-14-0 lb/day
81349 Nutrient Phosphorus, anion exchangeable, soil, dry weight, milligrams per 100 grams as phosphorus Not checked Dry Recoverable 7723-14-0 Phosphorus mg/100 g
81350 Nutrient Phosphorus retention, soil, dry weight, percent Not checked Dry Recoverable %
82046 Nutrient Nitrous oxide, water, dissolved, micrograms per liter Agree Dissolved 10024-97-2 Nitrous oxide ug/l
82267 Nutrient Phosphorus, street debris smaller than 0.031 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 0.031 mm 7723-14-0 Phosphorus mg/kg
82268 Nutrient Phosphorus, street debris smaller than 0.0625 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 0.0625 mm 7723-14-0 Phosphorus mg/kg
82269 Nutrient Phosphorus, street debris smaller than 0.125 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 0.125 mm 7723-14-0 Phosphorus mg/kg
82270 Nutrient Phosphorus, street debris smaller than 0.25 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 0.25 mm 7723-14-0 Phosphorus mg/kg
82271 Nutrient Phosphorus, street debris smaller than 0.5 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 0.5 mm 7723-14-0 Phosphorus mg/kg
82272 Nutrient Phosphorus, street debris smaller than 1.0 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 1.0 mm 7723-14-0 Phosphorus mg/kg
82273 Nutrient Phosphorus, street debris smaller than 2 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 2 mm 7723-14-0 Phosphorus mg/kg
82274 Nutrient Phosphorus, street debris smaller than 4 millimeters, dry weight, milligrams per kilogram as phosphorus Agree Dry < 4 mm 7723-14-0 Phosphorus mg/kg
82431 Nutrient Orthophosphate, total, dry atmospheric deposition, milligrams per kilogram as PO4 Agree Total 14265-44-2 Phosphate mg/kg PO4
82432 Nutrient Orthophosphate, total, dry atmospheric deposition, milligrams per kilogram as phosphorus Agree Total 14265-44-2 Phosphate mg/kg as P
82433 Nutrient Orthophosphate, insoluble, dry atmospheric deposition, milligrams per kilogram as PO4 Agree 14265-44-2 Phosphate mg/kg PO4
82435 Nutrient Orthophosphate, soluble, dry atmospheric deposition, milligrams per kilogram as PO4 Agree 14265-44-2 Phosphate mg/kg PO4
82436 Nutrient Orthophosphate, soluble, dry atmospheric deposition, milligrams per kilogram as phosphorus Agree 14265-44-2 Phosphate mg/kg as P
82437 Nutrient Phosphorus, total, dry atmospheric deposition, milligrams per kilogram as phosphate Agree Total 7723-14-0 Phosphorus mg/kg PO4
82438 Nutrient Phosphorus, dry atmospheric deposition, total, milligrams per kilogram as phosphorus Agree Total 7723-14-0 Phosphorus mg/kg
82440 Nutrient Phosphorus, insoluble, dry atmospheric deposition, milligrams per kilogram as phosphorus Agree 7723-14-0 Phosphorus mg/kg
82441 Nutrient Phosphorus, soluble, dry atmospheric deposition, milligrams per kilogram as phosphate Agree 7723-14-0 Phosphorus mg/kg PO4
82442 Nutrient Phosphorus, soluble, dry atmospheric deposition, milligrams per kilogram as phosphorus Agree 7723-14-0 Phosphorus mg/kg
82443 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], total, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/kg
82444 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], insoluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/kg
82445 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], soluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/kg
82446 Nutrient Organic nitrogen, total, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Total Organic nitrogen mg/kg
82447 Nutrient Organic nitrogen, insoluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Organic nitrogen mg/kg
82448 Nutrient Organic nitrogen, soluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Organic nitrogen mg/kg
82449 Nutrient Ammonia plus organic nitrogen, total, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Total Kjeldahl nitrogen mg/kg as N
82452 Nutrient Ammonia (NH3 + NH4+), total, dry atmospheric deposition, milligrams per kilogram as NH4 Agree Total Ammonia and ammonium mg/kg NH4
82453 Nutrient Ammonia (NH3 + NH4+), total, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Total Ammonia and ammonium mg/kg as N
82454 Nutrient Ammonia (NH3 + NH4+), insoluble, dry atmospheric deposition, milligrams per kilogram as NH4 Agree Ammonia and ammonium mg/kg NH4
82455 Nutrient Ammonia (NH3 + NH4+), insoluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Ammonia and ammonium mg/kg as N
82456 Nutrient Ammonia (NH3 + NH4+), soluble, dry atmospheric deposition, milligrams per kilogram as NH4 Agree Ammonia and ammonium mg/kg NH4
82457 Nutrient Ammonia (NH3 + NH4+), soluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Ammonia and ammonium mg/kg as N
82458 Nutrient Nitrate plus nitrite, soluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree Inorganic nitrogen (nitrate and nitrite) mg/kg as N
82459 Nutrient Nitrite, soluble, dry atmospheric deposition, milligrams per kilogram as nitrite Agree 14797-65-0 Nitrite mg/kg
82460 Nutrient Nitrite, soluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree 14797-65-0 Nitrite mg/kg as N
82461 Nutrient Nitrate, soluble, dry atmospheric deposition, milligrams per kilogram as nitrate Agree 14797-55-8 Nitrate mg/kg
82462 Nutrient Nitrate, soluble, dry atmospheric deposition, milligrams per kilogram as nitrogen Agree 14797-55-8 Nitrate mg/kg as N
83044 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, filtered, milligrams per liter as nitrogen Agree Dissolved Ammonia and ammonium mg/l as N
83045 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, filtered, milligrams per square meter as nitrogen Agree Dissolved Ammonia and ammonium mg/m2 as N
83046 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, filtered, microequivalents per liter Agree Dissolved Ammonia and ammonium ueq/L
83047 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, filtered, milligrams per liter as NH4 Agree Dissolved Ammonia and ammonium mg/l NH4
83048 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, filtered, milligrams per square meter as NH4 Agree Dissolved Ammonia and ammonium mg/m2 NH4
83049 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, filtered, microequivalents per liter Agree Dissolved Ammonia and ammonium ueq/L
83050 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, suspended, milligrams per liter as nitrogen Agree Suspended Ammonia and ammonium mg/l as N
83051 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, suspended, milligrams per square meter as nitrogen Agree Suspended Ammonia and ammonium mg/m2 as N
83052 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, suspended, microequivalents per liter Agree Suspended Ammonia and ammonium ueq/L
83053 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, suspended, milligrams per liter as NH4 Agree Suspended Ammonia and ammonium mg/l NH4
83054 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, suspended, milligrams per square meter as NH4 Agree Suspended Ammonia and ammonium mg/m2 NH4
83055 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, suspended, microequivalents per liter Agree Suspended Ammonia and ammonium ueq/L
83056 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, recoverable, milligrams per liter as nitrogen Agree Recoverable Ammonia and ammonium mg/l as N
83057 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, recoverable, milligrams per square meter as nitrogen Agree Recoverable Ammonia and ammonium mg/m2 as N
83058 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, recoverable, microequivalents per liter Agree Recoverable Ammonia and ammonium ueq/L
83059 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, recoverable, milligrams per liter as NH4 Agree Recoverable Ammonia and ammonium mg/l NH4
83060 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, recoverable, milligrams per square meter as NH4 Agree Recoverable Ammonia and ammonium mg/m2 NH4
83061 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, recoverable, microequivalents per liter Agree Recoverable Ammonia and ammonium ueq/L
83062 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, milligrams per liter as nitrogen Agree Total Ammonia and ammonium mg/l as N
83063 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, milligrams per square meter as nitrogen Agree Total Ammonia and ammonium mg/m2 as N
83064 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, microequivalents per liter Agree Total Ammonia and ammonium ueq/L
83065 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, milligrams per liter as NH4 Agree Total Ammonia and ammonium mg/l NH4
83066 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, milligrams per square meter as NH4 Agree Total Ammonia and ammonium mg/m2 NH4
83067 Nutrient Ammonia (NH3 + NH4+), wet atmospheric deposition, unfiltered, microequivalents per liter Agree Total Ammonia and ammonium ueq/L
83068 Nutrient Nitrate, wet atmospheric deposition, filtered, milligrams per liter as nitrogen Agree Dissolved 14797-55-8 Nitrate mg/l as N
83069 Nutrient Nitrate, wet atmospheric deposition, filtered, milligrams per square meter as nitrogen Agree Dissolved 14797-55-8 Nitrate mg/m2 as N
83071 Nutrient Nitrate, wet atmospheric deposition, filtered, milligrams per liter as nitrate Agree Dissolved 14797-55-8 Nitrate mg/l
83072 Nutrient Nitrate, wet atmospheric deposition, filtered, milligrams per square meter as nitrate Agree Dissolved 14797-55-8 Nitrate mg/m2
83077 Nutrient Nitrate, wet atmospheric deposition, unfiltered, milligrams per liter as nitrate Agree Total 14797-55-8 Nitrate mg/l
83078 Nutrient Nitrate, wet atmospheric deposition, unfiltered, milligrams per square meter as nitrate Agree Total 14797-55-8 Nitrate mg/m2
83095 Nutrient Nitrite, wet atmospheric deposition, filtered, milligrams per liter as nitrite Agree Dissolved 14797-65-0 Nitrite mg/l
83096 Nutrient Nitrite, wet atmospheric deposition, filtered, milligrams per square meter as nitrite Agree Dissolved 14797-65-0 Nitrite mg/m2
83101 Nutrient Nitrite, wet atmospheric deposition, unfiltered, milligrams per liter as nitrite Agree Total 14797-65-0 Nitrite mg/l
83102 Nutrient Nitrite, wet atmospheric deposition, unfiltered, milligrams per square meter as nitrite Agree Total 14797-65-0 Nitrite mg/m2
83108 Nutrient Orthophosphate, wet atmospheric deposition, filtered, milligrams per liter as phosphorus Agree Dissolved 14265-44-2 Phosphate mg/l as P
83109 Nutrient Orthophosphate, wet atmospheric deposition, filtered, milligrams per square meter as phosphorus Agree Dissolved 14265-44-2 Phosphate mg/m2 as P
83111 Nutrient Orthophosphate, wet atmospheric deposition, filtered, milligrams per liter as PO4 Agree Dissolved 14265-44-2 Phosphate mg/l
83112 Nutrient Orthophosphate, wet atmospheric deposition, filtered, milligrams per square meter as PO4 Agree Dissolved 14265-44-2 Phosphate mg/m2
83117 Nutrient Orthophosphate, wet atmospheric deposition, unfiltered, milligrams per liter as PO4 Agree Total 14265-44-2 Phosphate mg/l
83118 Nutrient Orthophosphate, wet atmospheric deposition, unfiltered, milligrams per square meter as PO4 Agree Total 14265-44-2 Phosphate mg/m2
83326 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, filtered, milligrams per liter as nitrogen Agree Dissolved Ammonia and ammonium mg/l as N
83327 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, filtered, milligrams per square meter as nitrogen Agree Dissolved Ammonia and ammonium mg/m2 as N
83328 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, filtered, microequivalents per liter Agree Dissolved Ammonia and ammonium ueq/L
83329 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, filtered, milligrams per liter as NH4 Agree Dissolved Ammonia and ammonium mg/l NH4
83330 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, filtered, milligrams per square meter as NH4 Agree Dissolved Ammonia and ammonium mg/m2 NH4
83331 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, filtered, microequivalents per liter Agree Dissolved Ammonia and ammonium ueq/L
83332 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, suspended, milligrams per liter as nitrogen Agree Suspended Ammonia and ammonium mg/l as N
83333 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, suspended, milligrams per square meter as nitrogen Agree Suspended Ammonia and ammonium mg/m2 as N
83334 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, suspended, microequivalents per liter Agree Suspended Ammonia and ammonium ueq/L
83335 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, suspended, milligrams per liter as NH4 Agree Suspended Ammonia and ammonium mg/l NH4
83336 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, suspended, milligrams per square meter as NH4 Agree Suspended Ammonia and ammonium mg/m2 NH4
83337 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, suspended, microequivalents per liter Agree Suspended Ammonia and ammonium ueq/L
83338 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, recoverable, milligrams per liter as nitrogen Agree Recoverable Ammonia and ammonium mg/l as N
83339 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, recoverable, milligrams per square meter as nitrogen Agree Recoverable Ammonia and ammonium mg/m2 as N
83340 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, recoverable, microequivalents per liter Agree Recoverable Ammonia and ammonium ueq/L
83341 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, recoverable, milligrams per liter as NH4 Agree Recoverable Ammonia and ammonium mg/l NH4
83342 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, recoverable, milligrams per square meter as NH4 Agree Recoverable Ammonia and ammonium mg/m2 NH4
83343 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, recoverable, microequivalents per liter Agree Recoverable Ammonia and ammonium ueq/L
83344 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, milligrams per liter as nitrogen Agree Total Ammonia and ammonium mg/l as N
83345 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, milligrams per square meter as nitrogen Agree Total Ammonia and ammonium mg/m2 as N
83346 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, microequivalents per liter Agree Total Ammonia and ammonium ueq/L
83347 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, milligrams per liter as NH4 Agree Total Ammonia and ammonium mg/l NH4
83348 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, milligrams per square meter as NH4 Agree Total Ammonia and ammonium mg/m2 NH4
83349 Nutrient Ammonia (NH3 + NH4+), bulk atmospheric deposition, unfiltered, microequivalents per liter Agree Total Ammonia and ammonium ueq/L
83353 Nutrient Nitrate, bulk atmospheric deposition, filtered, milligrams per liter as nitrate Agree Dissolved 14797-55-8 Nitrate mg/l
83354 Nutrient Nitrate, bulk atmospheric deposition, filtered, milligrams per square meter as nitrate Agree Dissolved 14797-55-8 Nitrate mg/m2
83359 Nutrient Nitrate, bulk atmospheric deposition, unfiltered, milligrams per liter as nitrate Agree Total 14797-55-8 Nitrate mg/l
83360 Nutrient Nitrate, bulk atmospheric deposition, unfiltered, milligrams per square meter as nitrate Agree Total 14797-55-8 Nitrate mg/m2
83377 Nutrient Nitrite, bulk atmospheric deposition, filtered, milligrams per liter as nitrite Agree Dissolved 14797-65-0 Nitrite mg/l
83378 Nutrient Nitrite, bulk atmospheric deposition, filtered, milligrams per square meter as nitrite Agree Dissolved 14797-65-0 Nitrite mg/m2
83383 Nutrient Nitrite, bulk atmospheric deposition, unfiltered, milligrams per liter as nitrite Agree Total 14797-65-0 Nitrite mg/l
83384 Nutrient Nitrite, bulk atmospheric deposition, unfiltered, milligrams per square meter as nitrite Agree Total 14797-65-0 Nitrite mg/m2
83393 Nutrient Orthophosphate, bulk atmospheric deposition, filtered, milligrams per liter as PO4 Agree Dissolved 14265-44-2 Phosphate mg/l
83394 Nutrient Orthophosphate, bulk atmospheric deposition, filtered, milligrams per square meter as PO4 Agree Dissolved 14265-44-2 Phosphate mg/m2
83398 Nutrient Orthophosphate, bulk atmospheric deposition, unfiltered, microequivalents per liter as PO4 Agree Total 14265-44-2 Phosphate ueq/L
83399 Nutrient Orthophosphate, bulk atmospheric deposition, unfiltered, milligrams per liter as PO4 Agree Total 14265-44-2 Phosphate mg/l
83400 Nutrient Orthophosphate, bulk atmospheric deposition, unfiltered, milligrams per square meter as PO4 Agree Total 14265-44-2 Phosphate mg/m2
83551 Nutrient Hydrolyzable phosphorus, water, dissolved, pounds per day Not checked Dissolved lb/day
83554 Nutrient Nitrate plus nitrite, water, total, short tons per day as nitrogen Not checked Total ton/d as N
83555 Nutrient Orthophosphate, water, dissolved, pounds of phosphorus per day Not checked Dissolved 14265-44-2 lb/d as P
83556 Nutrient Orthophosphate, water, dissolved, pounds of PO4 per day Not checked Dissolved 14265-44-2 lb/d asPO4
83561 Nutrient Nitrate plus nitrite load, water, in situ, milligrams per second as nitrogen Not checked Total Inorganic nitrogen (nitrate and nitrite) mg/s as N
90859 Nutrient Nitrate plus nitrite, water, unfiltered, calculated, milligrams per liter as nitrogen USGS use and no use by EPA Total Inorganic nitrogen (nitrate and nitrite) mg/l as N
90861 Nutrient Particulate nitrogen to particulate organic carbon mass ratio, number Not checked None
90869 Nutrient Nitrate plus nitrite, water, filtered, computed by regression equation, milligrams per liter as nitrogen Not checked Dissolved Inorganic nitrogen (nitrate and nitrite) mg/l as N
91003 Nutrient Nitrate, water, filtered, micrograms per liter as nitrate USGS use and no use by EPA Dissolved 14797-55-8 Nitrate ug/l
91004 Nutrient Orthophosphate, water, filtered, micrograms per liter as phosphorus USGS use and no use by EPA Dissolved 14265-44-2 Phosphate ug/L as P
91006 Nutrient Nitrate, water, dissolved, short tons of nitrate per day USGS use and no use by EPA Dissolved 14797-55-8 Nitrate tons/day
91007 Nutrient Phosphorus, water, unfiltered, short tons of phosphorus per day USGS use and no use by EPA Total 7723-14-0 Phosphorus tons/day
91008 Nutrient Phosphorus, water, dissolved, short tons of phosphorus per day USGS use and no use by EPA Dissolved 7723-14-0 Phosphorus tons/day
91012 Nutrient Nitrite, water, dissolved, short tons of nitrogen per day USGS use and no use by EPA Dissolved 14797-65-0 Nitrite tons/day
91013 Nutrient Ammonia plus organic nitrogen, water, unfiltered, short tons of nitrogen per day USGS use and no use by EPA Total Kjeldahl nitrogen ton/d as N
91014 Nutrient Ammonia (NH3 + NH4+), water, dissolved, short tons of nitrogen per day USGS use and no use by EPA Dissolved Ammonia and ammonium tons/day
91015 Nutrient Ammonia (NH3 + NH4+), water, unfiltered, short tons of nitrogen per day USGS use and no use by EPA Total Ammonia and ammonium tons/day
91047 Nutrient Organic nitrogen, water, unfiltered, pounds of nitrogen per day USGS use and no use by EPA Total Organic nitrogen lb/day
91048 Nutrient Ammonia (NH3 + NH4+), water, unfiltered, pounds of nitrogen per day USGS use and no use by EPA Total Ammonia and ammonium lb/day
91049 Nutrient Nitrate plus nitrite, water, unfiltered, pounds of nitrogen per day USGS use and no use by EPA Total Inorganic nitrogen (nitrate and nitrite) lb/d as N
91050 Nutrient Phosphorus, water, unfiltered, pounds of phosphorus per day USGS use and no use by EPA Total 7723-14-0 Phosphorus lb/day
91057 Nutrient Ammonia plus organic nitrogen, water, unfiltered, pounds of nitrogen per day USGS use and no use by EPA Total Kjeldahl nitrogen lb/d as N
91058 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, unfiltered, pounds of nitrogen per day USGS use and no use by EPA Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) lb/day
91059 Nutrient Orthophosphate, water, unfiltered, pounds of PO4 per day USGS use and no use by EPA Total 14265-44-2 Phosphate lb/day
91060 Nutrient Orthophosphate, water, dissolved, pounds per day USGS use and no use by EPA Dissolved 14265-44-2 Phosphate lb/day
91061 Nutrient Nitrate plus nitrite, water, dissolved, pounds of nitrogen per day USGS use and no use by EPA Dissolved Inorganic nitrogen (nitrate and nitrite) lb/d as N
99116 Nutrient Nitrite, water, filtered, field, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved 14797-65-0 Nitrite mg/l as N
99120 Nutrient Ammonia (NH3 + NH4+), water, filtered, field, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved Ammonia and ammonium mg/l as N
99121 Nutrient Nitrate, water, filtered, field, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved 14797-55-8 Nitrate mg/l as N
99122 Nutrient Orthophosphate, water, filtered, field, milligrams per liter as PO4 USGS use and no use by EPA Dissolved 14265-44-2 Phosphate mg/l
99123 Nutrient Ammonia (NH3 + NH4+), water, unfiltered, field, milligrams per liter as nitrogen USGS use and no use by EPA Total Ammonia and ammonium mg/l as N
99124 Nutrient Nitrate, water, unfiltered, field, milligrams per liter as nitrogen USGS use and no use by EPA Total 14797-55-8 Nitrate mg/l as N
99125 Nutrient Nitrite, water, unfiltered, field, milligrams per liter as nitrogen USGS use and no use by EPA Total 14797-65-0 Nitrite mg/l as N
99126 Nutrient Orthophosphate, water, unfiltered, field, milligrams per liter as PO4 USGS use and no use by EPA Total 14265-44-2 Phosphate mg/l
99130 Nutrient Nitrate, water, unfiltered, field, micromoles per liter USGS use and no use by EPA Total 14797-55-8 Nitrate umol/L
99133 Nutrient Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen Not checked Inorganic nitrogen (nitrate and nitrite) mg/l as N
99136 Nutrient Nitrate, water, in situ, micromoles per liter Not checked Total 14797-55-8 Nitrate umol/L
99137 Nutrient Nitrate, water, in situ, milligrams per liter as nitrogen Not checked Total 14797-55-8 Nitrate mg/l as N
99139 Nutrient Nitrate (plus nitrite)/orthophosphate, mole ratio Not checked Total None
99410 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, filtered, estimated by regression equation, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l as N
99411 Nutrient Nitrate, water, filtered, estimated by regression equation, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved 14797-55-8 Nitrate mg/l as N
99412 Nutrient Ammonia (NH3 + NH4+), water, filtered, estimated by regression equation, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved Ammonia and ammonium mg/l as N
99413 Nutrient Ammonia plus organic nitrogen, water, filtered, estimated by regression equation, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved Kjeldahl nitrogen mg/l as N
99414 Nutrient Orthophosphate, water, unfiltered, estimated by regression equation, milligrams per liter as phosphorus USGS use and no use by EPA Total 14265-44-2 Phosphate mg/l as P
99415 Nutrient Orthophosphate, water, filtered, estimated by regression equation, milligrams per liter as phosphorus USGS use and no use by EPA Dissolved 14265-44-2 Phosphate mg/l as P
99416 Nutrient Phosphorus, water, unfiltered, estimated by regression equation, milligrams per liter as phosphorus USGS use and no use by EPA Total 7723-14-0 Phosphorus mg/l
99423 Nutrient Hydrolyzable phosphorus, water, filtered, estimated by GCLAS, milligrams per liter as phosphorus Not checked Dissolved mg/l as P
99435 Nutrient Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, unfiltered, estimated by regression equation, milligrams per liter as nitrogen Not checked Total Nitrogen, mixed forms (NH3), (NH4), organic, (NO2) and (NO3) mg/l as N
99889 Nutrient Nitrate plus nitrite, water, filtered, field, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved Inorganic nitrogen (nitrate and nitrite) mg/l as N
99891 Nutrient Phosphorus, water, unfiltered, modified jirka method, milligrams per liter as phosphorus USGS use and no use by EPA Total 7723-14-0 Phosphorus mg/l
99892 Nutrient Ammonia plus organic nitrogen, water, unfiltered, modified jirka method, milligrams per liter as nitrogen USGS use and no use by EPA Total Kjeldahl nitrogen mg/l as N
99893 Nutrient Phosphorus, water, filtered, modified jirka method, milligrams per liter as phosphorus USGS use and no use by EPA Dissolved 7723-14-0 Phosphorus mg/l
99894 Nutrient Ammonia plus organic nitrogen, water, filtered, modified jirka method, milligrams per liter as nitrogen USGS use and no use by EPA Dissolved Kjeldahl nitrogen mg/l as N
