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Parameter Code Definition

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Parameter Code Group Name Parameter Name/Description Epa equivalence Result Statistical Basis Result Time Basis Result Weight Basis Result Particle Size Basis Result Sample Fraction Result Temperature Basis CASRN SRSName Parameter Unit
00191 Inorganics, Major, Non-metals Hydrogen ion, water, unfiltered, calculated, milligrams per liter Agree Total 12408-02-5 Hydrogen ion mg/l
00300 Inorganics, Major, Non-metals Dissolved oxygen, water, unfiltered, milligrams per liter Agree Dissolved 7782-44-7 Dissolved oxygen (DO) mg/l
00301 Inorganics, Major, Non-metals Dissolved oxygen, water, unfiltered, percent of saturation Agree Dissolved 7782-44-7 Dissolved oxygen saturation % saturatn
00405 Inorganics, Major, Non-metals Carbon dioxide, water, unfiltered, milligrams per liter Agree Total 124-38-9 Carbon dioxide mg/l
00409 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, Gran titration, microequivalents per liter Agree Total Alkalinity ueq/L
00410 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, fixed endpoint (pH 4.5) titration, field, milligrams per liter as calcium carbonate Not checked Total Alkalinity mg/l CaCO3
00411 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, methyl orange endpoint (pH 3.1-4.4) titration, milligrams per liter as calcium carbonate Not checked Total Alkalinity mg/l CaCO3
00413 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, Gran titration, milligrams per liter as calcium carbonate Agree Total Alkalinity mg/l CaCO3
00415 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, phenolphthalein endpoint (pH 8.5-9.0) titration, milligrams per liter as calcium carbonate Not checked Total Alkalinity mg/l CaCO3
00416 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter as calcium carbonate Not checked Total Alkalinity mg/l CaCO3
00417 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter as calcium carbonate Not checked Total Alkalinity mg/l CaCO3
00418 Inorganics, Major, Non-metals Alkalinity, water, filtered, fixed endpoint (pH 4.5) titration, field, milligrams per liter as calcium carbonate Not checked Dissolved Alkalinity mg/l CaCO3
00419 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter as calcium carbonate Not checked Total Alkalinity mg/l CaCO3
00420 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, milligrams per liter Not checked Total 14280-30-9 Hydroxide mg/l
00421 Inorganics, Major, Non-metals Alkalinity, water, filtered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter as calcium carbonate Not checked Dissolved Alkalinity mg/l CaCO3
00425 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, milligrams per liter as calcium carbonate Not checked Total 71-52-3 Bicarbonate mg/l CaCO3
00430 Inorganics, Major, Non-metals Carbonate, water, unfiltered, milligrams per liter as calcium carbonate Not checked Total 3812-32-6 Carbonate (CO3) mg/l CaCO3
00431 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, milligrams per liter as calcium carbonate Not checked Total Alkalinity mg/l CaCO3
00435 Inorganics, Major, Non-metals Acidity, water, unfiltered, milligrams per liter as calcium carbonate Not checked Total Acidity mg/l CaCO3
00436 Inorganics, Major, Non-metals Mineral acidity, water, unfiltered, methyl orange endpoint (pH 3.1-4.4) titration, milligrams per liter as calcium carbonate Not checked Total Acidity, mineral methyl orange (as CaCO3) mg/l CaCO3
00437 Inorganics, Major, Non-metals Carbon dioxide acidity, water, unfiltered, phenolphthalein endpoint (pH 8.5-9.0) titration, milligrams per liter as calcium carbonate Not checked Total Acidity, total, phenolphthalein (as CaCO3) mg/l CaCO3
00440 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, fixed endpoint (pH 4.5) titration, field, milligrams per liter Not checked Total 71-52-3 Bicarbonate mg/l
00445 Inorganics, Major, Non-metals Carbonate, water, unfiltered, fixed endpoint (pH 8.3) titration, field, milligrams per liter Not checked Total 3812-32-6 Carbonate (CO3) mg/l
00446 Inorganics, Major, Non-metals Carbonate, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter Not checked Total 3812-32-6 Carbonate (CO3) mg/l
00447 Inorganics, Major, Non-metals Carbonate, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter Not checked Total 3812-32-6 Carbonate (CO3) mg/l
00448 Inorganics, Major, Non-metals Carbonate, water, unfiltered, fixed endpoint (pH 8.3) titration, laboratory, milligrams per liter Not checked Total 3812-32-6 Carbonate (CO3) mg/l
00449 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter Not checked Total 71-52-3 Bicarbonate mg/l
00450 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter Not checked Total 71-52-3 Bicarbonate mg/l
00451 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter Not checked Total 71-52-3 Bicarbonate mg/l
00452 Inorganics, Major, Non-metals Carbonate, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter Not checked Dissolved 3812-32-6 Carbonate (CO3) mg/l
00453 Inorganics, Major, Non-metals Bicarbonate, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter Not checked Dissolved 71-52-3 Bicarbonate mg/l
00597 Inorganics, Major, Non-metals Dinitrogen, water, unfiltered, milligrams per liter Not checked Dissolved 7727-37-9 Nitrogen mg/l
00598 Inorganics, Major, Non-metals Dinitrogen, water, unfiltered, percent of saturation Not checked Dissolved 7727-37-9 Nitrogen %
00682 Inorganics, Major, Non-metals Carbon [inorganic plus organic], water, filtered, milligrams per liter Agree Dissolved 7440-44-0 Total Carbon mg/l
00685 Inorganics, Major, Non-metals Inorganic carbon, water, unfiltered, milligrams per liter Agree Total Inorganic carbon mg/l
00686 Inorganics, Major, Non-metals Inorganic carbon, bed sediment, total, dry weight, grams per kilogram Agree Dry Bed Sediment Inorganic carbon g/kg
00688 Inorganics, Major, Non-metals Inorganic carbon, suspended sediment, total, milligrams per liter Agree Suspended Inorganic carbon mg/l
00690 Inorganics, Major, Non-metals Carbon [inorganic plus organic], water, unfiltered, milligrams per liter Agree Total 7440-44-0 Total Carbon mg/l
00691 Inorganics, Major, Non-metals Inorganic carbon, water, filtered, milligrams per liter Agree Dissolved Inorganic carbon mg/l
00693 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment, total, dry weight, grams per kilogram Agree Dry Bed Sediment 7440-44-0 Total Carbon g/kg
00694 Inorganics, Major, Non-metals Carbon [inorganic plus organic], suspended sediment, total, milligrams per liter Agree Suspended 7440-44-0 Total Carbon mg/l
00709 Inorganics, Major, Non-metals Fluorine, adsorbable organic, water, unfiltered, nanograms per liter Not checked Total ng/l
00710 Inorganics, Major, Non-metals Fluorine, solids, dry weight, nanograms per kilogram Not checked Dry Total ng/kg
00711 Inorganics, Major, Non-metals Fluorine, biota, tissue, wet weight, nanograms per kilogram Not checked Wet Total ng/kg
00712 Inorganics, Major, Non-metals Fluorine, extractable organic, solids, dry weight, nanograms per kilogram Not checked Dry ng/kg
00713 Inorganics, Major, Non-metals Fluorine, extractable organic, biota, tissue, wet weight, nanograms per kilogram Not checked Wet ng/kg
00714 Inorganics, Major, Non-metals Fluorine, extractable organic, water, unfiltered, nanograms per liter Not checked Total ng/l
00745 Inorganics, Major, Non-metals Sulfide, water, unfiltered, milligrams per liter Agree Total 18496-25-8 Sulfide mg/l
00746 Inorganics, Major, Non-metals Sulfide, water, filtered, milligrams per liter Agree Dissolved 18496-25-8 Sulfide mg/l
00940 Inorganics, Major, Non-metals Chloride, water, filtered, milligrams per liter Not checked Dissolved 16887-00-6 Chloride mg/l
00945 Inorganics, Major, Non-metals Sulfate, water, filtered, milligrams per liter Not agree Dissolved 14808-79-8 Sulfate mg/l
00946 Inorganics, Major, Non-metals Sulfate, water, unfiltered, milligrams per liter Not agree Total 14808-79-8 Sulfate mg/l
00950 Inorganics, Major, Non-metals Fluoride, water, filtered, milligrams per liter Agree Dissolved 16984-48-8 Fluoride mg/l
00951 Inorganics, Major, Non-metals Fluoride, water, unfiltered, milligrams per liter Agree Total 16984-48-8 Fluoride mg/l
00953 Inorganics, Major, Non-metals Fluorine, water, unfiltered, micrograms per liter Agree Total 7782-41-4 Fluorine ug/l
00954 Inorganics, Major, Non-metals Silica, water, unfiltered, recoverable, micrograms per liter as SiO2 Not checked Recoverable 7631-86-9 Silica ug/l
00955 Inorganics, Major, Non-metals Silica, water, filtered, milligrams per liter as SiO2 Agree Dissolved 7631-86-9 Silica mg/l
00956 Inorganics, Major, Non-metals Silica, water, unfiltered, milligrams per liter as SiO2 Agree Total 7631-86-9 Silica mg/l
01140 Inorganics, Major, Non-metals Silicon, water, filtered, micrograms per liter Agree Dissolved 7440-21-3 Silicon ug/l
01142 Inorganics, Major, Non-metals Silicon, water, unfiltered, micrograms per liter Not checked Total 7440-21-3 Silicon ug/l
01394 Inorganics, Major, Non-metals Carbon (inorganic plus organic), bed sediment, total, dry weight, percent USGS use and no use by EPA Dry Bed Sediment 7440-44-0 Total Carbon %
01398 Inorganics, Major, Non-metals Sulfur, bed sediment, complete digestion, dry weight, percent USGS use and no use by EPA Dry Bed Sediment 7704-34-9 Sulfur %
01426 Inorganics, Major, Non-metals Sulfur, soil, complete digestion, dry weight, percent USGS use and no use by EPA Dry Total 7704-34-9 Sulfur %
01463 Inorganics, Major, Non-metals Carbon [inorganic plus organic], biota, tissue, total, dry weight, percent Not checked Dry 7440-44-0 Total Carbon %
01466 Inorganics, Major, Non-metals Sulfur, biota, tissue, complete digestion, dry weight, percent Not checked Dry 7704-34-9 Sulfur %
03941 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment smaller than 62.5 microns, wet sieved, laboratory, total, dry weight, percent Not checked Dry < 0.0625 Bed Sediment 7440-44-0 Total Carbon %
03945 Inorganics, Major, Non-metals Sulfur, bed sediment smaller than 62.5 microns, wet sieved, laboratory, complete digestion, dry weight, percent Not checked Dry < 0.0625 Bed Sediment 7704-34-9 Sulfur %
04069 Inorganics, Major, Non-metals Inorganic carbon, suspended sediment smaller than 62.5 microns, wet sieved (native water), total, dry weight, milligrams per kilogram Not checked Dry < 62.5 microns Suspended Inorganic carbon mg/kg
04079 Inorganics, Major, Non-metals Carbon [inorganic plus organic], suspended sediment smaller than 62.5 microns, wet sieved (native water), total, dry weight, milligrams per kilogram Not checked Dry < 62.5 microns Suspended 7440-44-0 Total Carbon mg/kg
29797 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, Gran titration, field, milligrams per liter USGS use and no use by EPA Total 71-52-3 Bicarbonate mg/l
29798 Inorganics, Major, Non-metals Carbonate, water, unfiltered, Gran titration, field, milligrams per liter USGS use and no use by EPA Total 3812-32-6 Carbonate (CO3) mg/l
29799 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, Gran titration, field, milligrams per liter USGS use and no use by EPA Total 14280-30-9 Hydroxide mg/l
29800 Inorganics, Major, Non-metals Hydroxide, water, filtered, Gran titration, field, milligrams per liter USGS use and no use by EPA Dissolved 14280-30-9 Hydroxide mg/l
29801 Inorganics, Major, Non-metals Alkalinity, water, filtered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter as calcium carbonate Agree Dissolved Alkalinity mg/l CaCO3
29802 Inorganics, Major, Non-metals Alkalinity, water, filtered, Gran titration, field, milligrams per liter as calcium carbonate Agree Dissolved Alkalinity mg/l CaCO3
29803 Inorganics, Major, Non-metals Alkalinity, water, filtered, Gran titration, laboratory, milligrams per liter as calcium carbonate Agree Dissolved Alkalinity mg/l CaCO3
29804 Inorganics, Major, Non-metals Bicarbonate, water, filtered, fixed endpoint (pH 4.5) titration, field, milligrams per liter Agree Dissolved 71-52-3 Bicarbonate mg/l
29805 Inorganics, Major, Non-metals Bicarbonate, water, filtered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter Agree Dissolved 71-52-3 Bicarbonate mg/l
29806 Inorganics, Major, Non-metals Bicarbonate, water, filtered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter Agree Dissolved 71-52-3 Bicarbonate mg/l
29807 Inorganics, Major, Non-metals Carbonate, water, filtered, fixed endpoint (pH 8.3) titration, field, milligrams per liter Not agree Dissolved 3812-32-6 Carbonate (CO3) mg/l
29808 Inorganics, Major, Non-metals Carbonate, water, filtered, fixed endpoint (pH 8.3) titration, laboratory, milligrams per liter Not agree Dissolved 3812-32-6 Carbonate (CO3) mg/l
29809 Inorganics, Major, Non-metals Carbonate, water, filtered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter Not agree Dissolved 3812-32-6 Carbonate (CO3) mg/l
29810 Inorganics, Major, Non-metals Hydroxide, water, filtered, fixed endpoint (pH 10.4) titration, field, milligrams per liter Agree Dissolved 14280-30-9 Hydroxide mg/l
29811 Inorganics, Major, Non-metals Hydroxide, water, filtered, fixed endpoint (pH 10.4) titration, laboratory, milligrams per liter Agree Dissolved 14280-30-9 Hydroxide mg/l
29812 Inorganics, Major, Non-metals Hydroxide, water, filtered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter Agree Dissolved 14280-30-9 Hydroxide mg/l
29813 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, Gran titration, field, milligrams per liter as calcium carbonate Agree Total Alkalinity mg/l CaCO3
29849 Inorganics, Major, Non-metals Silicon, soil, recoverable, dry weight, milligrams per kilogram Agree Dry Recoverable 7440-21-3 Silicon mg/kg
30241 Inorganics, Major, Non-metals Inorganic carbon, bed sediment, dry weight, percent Agree Dry Bed Sediment Inorganic carbon %
30242 Inorganics, Major, Non-metals Inorganic carbon, suspended sediment, total, dry weight, percent Agree Dry Suspended Inorganic carbon %
30244 Inorganics, Major, Non-metals Carbon [inorganic plus organic], suspended sediment, total, dry weight, percent Agree Dry Suspended 7440-44-0 Total Carbon %
30307 Inorganics, Major, Non-metals Sulfur, bed sediment, dry weight, percent Agree Dry Bed Sediment 7704-34-9 Sulfur %
30308 Inorganics, Major, Non-metals Sulfur, suspended sediment, complete digestion, dry weight, percent Not checked Dry Suspended 7704-34-9 Sulfur %
30362 Inorganics, Major, Non-metals Chloride, bed sediment, recoverable, dry weight, milligrams per kilogram Not checked Dry Bed Sediment 16887-00-6 mg/kg
30363 Inorganics, Major, Non-metals Fluoride, bed sediment, recoverable, dry weight, milligrams per kilogram Not checked Dry Bed Sediment 16984-48-8 mg/kg
30364 Inorganics, Major, Non-metals Sulfate, bed sediment, recoverable, dry weight, milligrams per kilogram Not checked Dry Bed Sediment 14808-79-8 mg/kg
30372 Inorganics, Major, Non-metals Chloride, soil, recoverable, dry weight, milligrams per kilogram Not checked Dry Recoverable 16887-00-6 mg/kg
30373 Inorganics, Major, Non-metals Fluoride, soil, recoverable, dry weight, milligrams per kilogram Not checked Dry Recoverable 16984-48-8 mg/kg
30374 Inorganics, Major, Non-metals Sulfate, soil, recoverable, dry weight, milligrams per kilogram Not checked Dry Recoverable 14808-79-8 mg/kg
30375 Inorganics, Major, Non-metals Silica, soil, recoverable, dry weight, milligrams per kilogram Not checked Dry Recoverable 7631-86-9 mg/kg
30376 Inorganics, Major, Non-metals Sulfur, soil, recoverable, dry weight, milligrams per kilogram Not checked Dry Recoverable 7704-34-9 mg/kg
34970 Inorganics, Major, Non-metals Sulfur, bed sediment smaller than 62.5 microns, wet sieved, field, complete digestion, dry weight, percent Not checked Dry < 62.5 microns Bed Sediment 7704-34-9 Sulfur %
34971 Inorganics, Major, Non-metals Sulfur, bed sediment smaller than 177 microns, wet sieved, field, complete digestion, dry weight, milligrams per kilogram Not checked Dry < 177 microns Bed Sediment 7704-34-9 Sulfur mg/kg
34972 Inorganics, Major, Non-metals Sulfur, bed sediment smaller than 62.5 microns, dry sieved, laboratory, complete digestion, dry weight, percent Not checked Dry < 62.5 microns Bed Sediment 7704-34-9 Sulfur %
34973 Inorganics, Major, Non-metals Sulfur, suspended sediment smaller than 62.5 microns, complete digestion, dry weight, milligrams per kilogram Not checked Dry < 62.5 microns Suspended 7704-34-9 Sulfur mg/kg
34974 Inorganics, Major, Non-metals Sulfur, suspended sediment larger than 62.5 microns, complete digestion, dry weight, milligrams per kilogram Not checked Dry > 62.5 microns Suspended 7704-34-9 Sulfur mg/kg
35054 Inorganics, Major, Non-metals Carbon (inorganic plus organic), 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 7440-44-0 Total Carbon %
39036 Inorganics, Major, Non-metals Alkalinity, water, filtered, fixed endpoint (pH 4.5) titration, field, milligrams per liter as calcium carbonate Not checked Dissolved Alkalinity mg/l CaCO3
39086 Inorganics, Major, Non-metals Alkalinity, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter as calcium carbonate Agree Dissolved Alkalinity mg/l CaCO3
39087 Inorganics, Major, Non-metals Alkalinity, water, filtered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter as calcium carbonate Agree Dissolved Alkalinity mg/l CaCO3
46247 Inorganics, Major, Non-metals Carbon [inorganic plus organic], soil, total, dry weight, percent Agree Dry Total 7440-44-0 Total Carbon %
49267 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment smaller than 62.5 microns, wet sieved (native water), field, recoverable, dry weight, percent Not agree Dry < 62.5 microns Bed Sediment 7440-44-0 Total Carbon %
49269 Inorganics, Major, Non-metals Inorganic carbon, bed sediment smaller than 62.5 microns, wet sieved (native water), field, recoverable, dry weight, percent Not agree Dry < 62.5 microns Bed Sediment Inorganic carbon %
49270 Inorganics, Major, Non-metals Inorganic carbon, bed sediment smaller than 2 millimeters, wet sieved (native water), field, recoverable, dry weight, grams per kilogram Not agree Dry < 2 mm Bed Sediment Inorganic carbon g/kg
49272 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment smaller than 2 millimeters, wet sieved (native water), field, recoverable, dry weight, grams per kilogram Not agree Dry < 2 mm Bed Sediment 7440-44-0 Total Carbon g/kg
50060 Inorganics, Major, Non-metals Chlorine (total residual), water, unfiltered, milligrams per liter Agree Total Residual 7782-50-5 Chlorine mg/l
50064 Inorganics, Major, Non-metals Chlorine, free available, water, unfiltered, milligrams per liter Agree Free Available 7782-50-5 Chlorine mg/l
50066 Inorganics, Major, Non-metals Chlorine (combined available), water, unfiltered, milligrams per liter Agree Comb Available 7782-50-5 Chlorine mg/l
50932 Inorganics, Major, Non-metals Sulfur, water, filtered, milligrams per liter Not checked Dissolved 7704-34-9 mg/l
51128 Inorganics, Major, Non-metals Silicon, bed sediment, recoverable, dry weight, milligrams per kilogram Not checked Dry Bed Sediment 7440-21-3 Silicon mg/kg
51179 Inorganics, Major, Non-metals Sulfur, soil, field, x-ray fluorescence screening method, parts per million Not checked 7704-34-9 Sulfur ppm
51189 Inorganics, Major, Non-metals Hydrogen, water, mole percent of dissolved gases Not checked Dissolved 1333-74-0 Hydrogen %
51191 Inorganics, Major, Non-metals Oxygen, water, mole percent of dissolved gases Not checked Dissolved 7782-44-7 Oxygen %
51192 Inorganics, Major, Non-metals Carbon dioxide, water, mole percent of dissolved gases Not checked Dissolved 124-38-9 Carbon dioxide %
51193 Inorganics, Major, Non-metals Dinitrogen, water, mole percent of dissolved gases Not checked Dissolved 7727-37-9 Nitrogen %
51194 Inorganics, Major, Non-metals Carbon monoxide, water, mole percent of dissolved gases Not checked Dissolved 630-08-0 Carbon monoxide %
51364 Inorganics, Major, Non-metals Inorganic carbon, bed sediment smaller than 150 um, dry sieved, lab, complete digestion, dry weight, percent Not checked Dry <150 um Bed Sediment Inorganic carbon %
51366 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment smaller than 150 um, dry sieved, lab, complete digestion, dry weight, percent Not checked Dry <150 um Bed Sediment 7440-44-0 %
51393 Inorganics, Major, Non-metals Sulfur, bed sediment smaller than 150 um, dry sieved, lab, complete digestion, dry weight, percent Not checked Dry <150 um Bed Sediment 7704-34-9 %
52666 Inorganics, Major, Non-metals Inorganic carbon in bed sediment, dry weight, milligrams per kilogram Not checked Dry Bed Sediment mg/kg
52682 Inorganics, Major, Non-metals Sulfate, water, filtered, micromoles per liter Not checked Dissolved 14808-79-8 umol/L
52683 Inorganics, Major, Non-metals Chloride, water, filtered, millimoles per liter Not checked Dissolved 16887-00-6 mmol/L
53029 Inorganics, Major, Non-metals Sulfur, water, unfiltered, micrograms per liter Not checked Total 7704-34-9 ug/l
53514 Inorganics, Major, Non-metals Silicon, water, unfiltered, milligrams per liter Not checked Recoverable 7440-21-3 mg/l
53644 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment smaller than 2 millimeters, wet sieved (native water), complete digestion, dry weight, percent Not checked Dry < 2 mm Bed Sediment 7440-44-0 %
53953 Inorganics, Major, Non-metals Bromide, water, unfiltered, micrograms per liter Not checked 24959-67-9 ug/l
53981 Inorganics, Major, Non-metals Dinitrogen error, water, dissolved, cubic centimeters per gram at standard temperature and pressure Not checked Dissolved 7727-37-9 cm3/g STP
54152 Inorganics, Major, Non-metals Oxygen, soil gas, in situ, sensor reading uncorrected for temperature and pressure, percent of soil gas Not checked 7782-44-7 % by vol
54153 Inorganics, Major, Non-metals Carbon dioxide, soil gas, in situ, sensor reading uncorrected for temperature and pressure, percent of soil gas Not checked 124-38-9 % by vol
54154 Inorganics, Major, Non-metals Oxygen plus argon, soil gas, uncorrected for temperature and pressure, percent of soil gas Not checked % by vol
54155 Inorganics, Major, Non-metals Dinitrogen, soil gas, uncorrected for temperature and pressure, percent of soil gas Not checked 7727-37-9 % by vol
54157 Inorganics, Major, Non-metals Oxygen, soil gas, in situ, sensor reading corrected for temperature and pressure, percent of soil gas Not checked 7782-44-7 % by vol
54158 Inorganics, Major, Non-metals Carbon dioxide, soil gas, in situ, sensor reading corrected for temperature and pressure, percent of soil gas Not checked 124-38-9 % by vol
54159 Inorganics, Major, Non-metals Carbon dioxide efflux, soil gas, micromoles per square meter per second Not checked 124-38-9 umol/m2/s
54563 Inorganics, Major, Non-metals Hydrogen, air, recoverable, mole percent Not checked Recoverable 1333-74-0 %
54565 Inorganics, Major, Non-metals Oxygen, air, recoverable, mole percent Not checked Recoverable 7782-44-7 %
54566 Inorganics, Major, Non-metals Carbon dioxide, air, recoverable, mole percent Not checked Recoverable 124-38-9 %
54567 Inorganics, Major, Non-metals Dinitrogen, air, recoverable, mole percent Not checked Recoverable 7727-37-9 %
54568 Inorganics, Major, Non-metals Carbon monoxide, air, recoverable, mole percent Not checked Recoverable 630-08-0 %
54579 Inorganics, Major, Non-metals Hydrogen, air, recoverable, milligrams per liter Not checked Recoverable 1333-74-0 mg/l
54580 Inorganics, Major, Non-metals Oxygen + argon, air, recoverable, milligrams per liter Not checked Recoverable 7782-44-7 mg/l
54581 Inorganics, Major, Non-metals Carbon dioxide, air, recoverable, milligrams per liter Not checked Recoverable 124-38-9 mg/l
54582 Inorganics, Major, Non-metals Dinitrogen, air, recoverable, milligrams per liter Not checked Recoverable 7727-37-9 mg/l
54583 Inorganics, Major, Non-metals Carbon monoxide, air, recoverable, milligrams per liter Not checked Recoverable 630-08-0 mg/l
54825 Inorganics, Major, Non-metals Carbon dioxide density, air, in situ, milligrams per cubic meters Not checked 124-38-9 mg/m3
54826 Inorganics, Major, Non-metals Coefficient of determination, carbon dioxide efflux, soil gas Not checked None
54827 Inorganics, Major, Non-metals Coefficient of variation, carbon dioxide efflux, soil gas Not checked None
54828 Inorganics, Major, Non-metals Carbon dioxide, air, dry, recoverable, mole percent Not checked Recoverable 124-38-9 %
54829 Inorganics, Major, Non-metals Carbon dioxide, air, recoverable, percent by volume Not checked Recoverable 124-38-9 % by vol
54830 Inorganics, Major, Non-metals Oxygen, air, recoverable, percent by volume Not checked Recoverable 7782-44-7 Oxygen % by vol
61034 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment smaller than 2 millimeters, total, dry weight, percent Agree Dry < 2 mm Bed Sediment 7440-44-0 Total Carbon %
61049 Inorganics, Major, Non-metals Sulfur, bed sediment smaller than 2 millimeters, complete digestion, dry weight, percent Not checked Dry < 2 mm Bed Sediment 7704-34-9 Sulfur %
61713 Inorganics, Major, Non-metals Inorganic carbon, bed sediment smaller than 2 millimeters, wet sieved (native water), complete digestion, dry weight, percent Agree Dry < 2 mm Bed Sediment Inorganic carbon %
62460 Inorganics, Major, Non-metals Silica, bed sediment, dry weight, milligrams per kilogram USGS use and no use by EPA Dry Bed Sediment 7631-86-9 Silica mg/kg
62462 Inorganics, Major, Non-metals Inorganic carbon, bed sediment, dry weight, percent USGS use and no use by EPA Dry Bed Sediment Inorganic carbon % by wt
62463 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment, dry weight, percent USGS use and no use by EPA Dry Bed Sediment 7440-44-0 Total Carbon % by wt
62944 Inorganics, Major, Non-metals Inorganic carbon, solids, dry weight, percent USGS use and no use by EPA Dry Inorganic carbon %
62946 Inorganics, Major, Non-metals Carbon [inorganic plus organic], solids, dry weight, percent USGS use and no use by EPA Dry 7440-44-0 Total Carbon %
62951 Inorganics, Major, Non-metals Chloride, solids, dry weight, milligrams per kilogram USGS use and no use by EPA Dry 16887-00-6 Chloride mg/kg
62952 Inorganics, Major, Non-metals Sulfate, solids, dry weight, milligrams per kilogram USGS use and no use by EPA Dry 14808-79-8 Sulfate mg/kg
62971 Inorganics, Major, Non-metals Dissolved oxygen, water, unfiltered, lab, milligrams per liter USGS use and no use by EPA Dissolved 7782-44-7 Dissolved oxygen (DO) mg/l
63039 Inorganics, Major, Non-metals Carbon (total), solids, dry weight, milligrams per kilogram USGS use and no use by EPA Dry Total 7440-44-0 Carbon mg/kg
63153 Inorganics, Major, Non-metals Sulfide, solids, dry weight, milligrams per kilogram USGS use and no use by EPA Dry 18496-25-8 Sulfide mg/kg
63689 Inorganics, Major, Non-metals Bromide, water, unfiltered, milligrams per liter USGS use and no use by EPA Total 24959-67-9 Bromide mg/l
63713 Inorganics, Major, Non-metals Bromide, solids, recoverable, dry weight, milligrams per kilogram USGS use and no use by EPA Dry Recoverable 24959-67-9 Bromide mg/kg
63714 Inorganics, Major, Non-metals Fluoride, solids, recoverable, dry weight, milligrams per kilogram USGS use and no use by EPA Dry Recoverable 16984-48-8 Fluoride mg/kg
63719 Inorganics, Major, Non-metals Sulfur, water, filtered, micrograms per liter USGS use and no use by EPA Dissolved 7704-34-9 Sulfur ug/l
63786 Inorganics, Major, Non-metals Bicarbonate, water, filtered, Gran titration, field, milligrams per liter USGS use and no use by EPA Dissolved 71-52-3 Bicarbonate mg/l
63788 Inorganics, Major, Non-metals Carbonate, water, filtered, Gran titration, field, milligrams per liter USGS use and no use by EPA Dissolved 3812-32-6 Carbonate (CO3) mg/l
63789 Inorganics, Major, Non-metals Carbonate, water, filtered, Gran titration, lab, milligrams per liter USGS use and no use by EPA Dissolved 3812-32-6 Carbonate (CO3) mg/l
64185 Inorganics, Major, Non-metals Hydrogen, water, unfiltered, nanomoles per liter USGS use and no use by EPA Total 1333-74-0 Hydrogen nmol/L
68799 Inorganics, Major, Non-metals Sulfide, bed sediment, recoverable, wet weight, micrograms per kilogram USGS use and no use by EPA Wet Bed Sediment 18496-25-8 ug/kg
68809 Inorganics, Major, Non-metals Silica, water, filtered, micrograms per liter as SiO2 USGS use and no use by EPA Dissolved 7631-86-9 ug/l
70287 Inorganics, Major, Non-metals Silicon, water, filtered, milligrams per liter Not checked Dissolved 7440-21-3 Silicon mg/l
70289 Inorganics, Major, Non-metals Chloride, water, dissolved, pounds per day Not checked Dissolved 16887-00-6 lb/day
70290 Inorganics, Major, Non-metals Chloride, water, dissolved, short tons per day Agree Dissolved 16887-00-6 Chloride tons/day
70291 Inorganics, Major, Non-metals Sulfate, water, dissolved, short tons per day Agree Dissolved 14808-79-8 Sulfate tons/day
70387 Inorganics, Major, Non-metals Chloride, water, unfiltered, computed by regression equation, milligrams per liter Not checked 16887-00-6 Chloride mg/l
70388 Inorganics, Major, Non-metals Chloride flux, water, unfiltered, computed by regression equation, kilograms per day Not checked 16887-00-6 Chloride kg/day
70389 Inorganics, Major, Non-metals Chloride flux, water, filtered, computed by regression equation, kilograms per day Not checked 16887-00-6 Chloride kg/day
70390 Inorganics, Major, Non-metals Chloride flux, water, unfiltered, computed by regression equation, pounds per day Not checked 16887-00-6 Chloride lb/day
70391 Inorganics, Major, Non-metals Chloride flux, water, filtered, computed by regression equation, pounds per day Not checked 16887-00-6 Chloride lb/day
70392 Inorganics, Major, Non-metals Chloride yield, water, unfiltered, computed by regression equation, kilograms per day per square kilometer Not checked 16887-00-6 Chloride kg/day/km2
70393 Inorganics, Major, Non-metals Chloride yield, water, filtered, computed by regression equation, kilograms per day per square kilometer Not checked 16887-00-6 Chloride kg/day/km2
70394 Inorganics, Major, Non-metals Chloride yield, water, unfiltered, computed by regression equation, pounds per day per square mile Not checked 16887-00-6 Chloride lb/day/mi2
70395 Inorganics, Major, Non-metals Chloride yield, water, filtered, computed by regression equation, pounds per day per square mile Not checked 16887-00-6 Chloride lb/day/mi2
70504 Inorganics, Major, Non-metals Acidity, water, filtered, heated, milligrams per liter as calcium carbonate USGS use and no use by EPA Dissolved Heated mg/l CaCO3
70508 Inorganics, Major, Non-metals Acidity, water, unfiltered, heated, milligrams per liter as calcium carbonate Agree Total Heated Acidity mg/l CaCO3
71825 Inorganics, Major, Non-metals Acidity, water, unfiltered, heated, milligrams per liter as hydrogen ion Not checked Total Heated Acidity mg/l as H
71830 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, fixed endpoint (pH 10.4) titration, field, milligrams per liter Not checked Total 14280-30-9 Hydroxide mg/l
71831 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter Not checked Total 14280-30-9 Hydroxide mg/l
71832 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter Not checked Total 14280-30-9 Hydroxide mg/l
71833 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, fixed endpoint (pH 10.4) titration, laboratory, milligrams per liter Not checked Total 14280-30-9 Hydroxide mg/l
71834 Inorganics, Major, Non-metals Hydroxide, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter Agree Dissolved 14280-30-9 Hydroxide mg/l
71870 Inorganics, Major, Non-metals Bromide, water, filtered, milligrams per liter Not checked Dissolved 24959-67-9 Bromide mg/l
71875 Inorganics, Major, Non-metals Hydrogen sulfide, water, unfiltered, milligrams per liter Not checked Total 7783-06-4 Hydrogen sulfide mg/l
72210 Inorganics, Major, Non-metals Dissolved oxygen, water, unfiltered, mid-depth of water column, percent of saturation Not checked Total 7782-44-7 Dissolved oxygen saturation % saturatn
72240 Inorganics, Major, Non-metals Carbon dioxide, water, at the water surface, parts per million by volume of dissolved gases Not checked Dissolved 124-38-9 ppmv
80107 Inorganics, Major, Non-metals Sulfur, water, unfiltered, milligrams per liter Agree Total 7704-34-9 Sulfur mg/l
81200 Inorganics, Major, Non-metals Silica, water, dissolved, short tons per day Not checked Dissolved 7631-86-9 Silica tons/day
81205 Inorganics, Major, Non-metals Bicarbonate, water, dissolved, short tons per day Not checked Dissolved 71-52-3 Bicarbonate tons/day
81612 Inorganics, Major, Non-metals Sulfate, bed sediment, dry weight, grams per kilogram Agree Dry Bed Sediment 14808-79-8 Sulfate g/kg
82042 Inorganics, Major, Non-metals Hydrogen, water, dissolved, micrograms per liter Agree Dissolved 1333-74-0 Hydrogen ug/l
82476 Inorganics, Major, Non-metals Chloride, soluble, dry atmospheric deposition, milligrams per kilogram Agree 16887-00-6 Chloride mg/kg
82477 Inorganics, Major, Non-metals Sulfate, soluble, dry atmospheric deposition, milligrams per kilogram Agree 14808-79-8 Sulfate mg/kg
82482 Inorganics, Major, Non-metals Inorganic carbon, total, dry atmospheric deposition, milligrams per kilogram Agree Total Inorganic carbon mg/kg
82907 Inorganics, Major, Non-metals Acid neutralizing capacity, wet atmospheric deposition, unfiltered, laboratory, microequivalents per liter Agree Total Alkalinity ueq/L
82944 Inorganics, Major, Non-metals Chloride, wet atmospheric deposition, filtered, milligrams per liter Agree Dissolved 16887-00-6 Chloride mg/l
82945 Inorganics, Major, Non-metals Chloride, wet atmospheric deposition, filtered, milligrams per square meter Agree Dissolved 16887-00-6 Chloride mg/m2
82975 Inorganics, Major, Non-metals Hydrogen ion, wet atmospheric deposition, filtered, milligrams per square meter Agree Dissolved 12408-02-5 Hydrogen ion mg/m2
82982 Inorganics, Major, Non-metals Hydrogen ion, wet atmospheric deposition, filtered, calculated, microequivalents per liter Agree Dissolved 12408-02-5 Hydrogen ion ueq/L
83160 Inorganics, Major, Non-metals Sulfate, wet atmospheric deposition, filtered, milligrams per liter Agree Dissolved 14808-79-8 Sulfate mg/l
83161 Inorganics, Major, Non-metals Sulfate, wet atmospheric deposition, filtered, milligrams per square meter Agree Dissolved 14808-79-8 Sulfate mg/m2
83226 Inorganics, Major, Non-metals Chloride, bulk atmospheric deposition, filtered, milligrams per liter Agree Dissolved 16887-00-6 Chloride mg/l
83442 Inorganics, Major, Non-metals Sulfate, bulk atmospheric deposition, filtered, milligrams per liter Agree Dissolved 14808-79-8 Sulfate mg/l
83560 Inorganics, Major, Non-metals Carbon dioxide load, water, dissolved, milligrams per second Not checked Dissolved 124-38-9 mg/s
85544 Inorganics, Major, Non-metals Carbon dioxide, water, volume percent of dissolved gases Agree Dissolved 124-38-9 Carbon dioxide %
85546 Inorganics, Major, Non-metals Hydrogen, water, volume percent of dissolved gases Agree Dissolved 1333-74-0 Hydrogen %
85548 Inorganics, Major, Non-metals Nitrogen plus carbon monoxide, water, volume percent of dissolved gases Agree Dissolved %
85550 Inorganics, Major, Non-metals Dissolved oxygen, water, volume percent of dissolved gases Agree Dissolved 7782-44-7 Dissolved oxygen (DO) %
85570 Inorganics, Major, Non-metals Dinitrogen, water, dissolved, cubic centimeters per gram at standard temperature and pressure USGS use and no use by EPA Dissolved 7727-37-9 Nitrogen cm3/g @STP
85571 Inorganics, Major, Non-metals Carbon dioxide, water, unfiltered, cubic centimeters per gram at standard temperature and pressure USGS use and no use by EPA Total 124-38-9 Carbon dioxide cm3/g @STP
85573 Inorganics, Major, Non-metals Dissolved oxygen, water, dissolved, cubic centimeters per gram at standard temperature and pressure USGS use and no use by EPA Dissolved 7782-44-7 Dissolved oxygen (DO) cm3/g @STP
85576 Inorganics, Major, Non-metals Hydrogen, water, dissolved, nanomoles per kilogram Not checked Dissolved 1333-74-0 Hydrogen nmol/kg
85590 Inorganics, Major, Non-metals Carbon [inorganic plus organic], bed sediment, total, dry weight, milligrams per kilogram Not checked Dry Bed Sediment 7440-44-0 mg/kg
90300 Inorganics, Major, Non-metals Dissolved oxygen, water, unfiltered, area weighted average, milligrams per liter USGS use and no use by EPA Dissolved 7782-44-7 Dissolved oxygen (DO) mg/l
90410 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter as calcium carbonate USGS use and no use by EPA Total Alkalinity mg/l CaCO3
90430 Inorganics, Major, Non-metals Carbonate, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter as calcium carbonate USGS use and no use by EPA Total 3812-32-6 Carbonate (CO3) mg/l CaCO3
90440 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter USGS use and no use by EPA Total 71-52-3 Bicarbonate mg/l
90445 Inorganics, Major, Non-metals Carbonate, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter USGS use and no use by EPA Total 3812-32-6 Carbonate (CO3) mg/l
90830 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter USGS use and no use by EPA Total 14280-30-9 Hydroxide mg/l
91000 Inorganics, Major, Non-metals Bromide, water, filtered, micrograms per liter USGS use and no use by EPA Dissolved 24959-67-9 Bromide ug/l
91001 Inorganics, Major, Non-metals Chloride, water, filtered, micrograms per liter USGS use and no use by EPA Dissolved 16887-00-6 Chloride ug/l
91002 Inorganics, Major, Non-metals Fluoride, water, filtered, micrograms per liter USGS use and no use by EPA Dissolved 16984-48-8 Fluoride ug/l
91005 Inorganics, Major, Non-metals Sulfate, water, filtered, micrograms per liter USGS use and no use by EPA Dissolved 14808-79-8 Sulfate ug/l
95410 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter as calcium carbonate USGS use and no use by EPA Total Alkalinity mg/l CaCO3
95430 Inorganics, Major, Non-metals Carbonate, water, unfiltered, fixed endpoint (pH 8.3) titration, laboratory, milligrams per liter as calcium carbonate USGS use and no use by EPA Total 3812-32-6 Carbonate (CO3) mg/l CaCO3
95440 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter USGS use and no use by EPA Total 71-52-3 Bicarbonate mg/l
95445 Inorganics, Major, Non-metals Carbonate, water, unfiltered, fixed endpoint (pH 8.3) titration, laboratory, milligrams per liter USGS use and no use by EPA Total 3812-32-6 Carbonate (CO3) mg/l
95830 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, fixed endpoint (pH 10.4) titration, laboratory, milligrams per liter USGS use and no use by EPA Total 14280-30-9 Hydroxide mg/l
99113 Inorganics, Major, Non-metals Sulfate, water, filtered, field, milligrams per liter USGS use and no use by EPA Dissolved 14808-79-8 Sulfate mg/l
99117 Inorganics, Major, Non-metals Chloride, water, filtered, field, milligrams per liter USGS use and no use by EPA Dissolved 16887-00-6 Chloride mg/l
99118 Inorganics, Major, Non-metals Sulfide, water, filtered, field, milligrams per liter USGS use and no use by EPA Dissolved 18496-25-8 Sulfide mg/l
99119 Inorganics, Major, Non-metals Sulfide, water, unfiltered, field, milligrams per liter USGS use and no use by EPA Total 18496-25-8 Sulfide mg/l
99127 Inorganics, Major, Non-metals Sulfate, water, unfiltered, field, milligrams per liter USGS use and no use by EPA Total 14808-79-8 Sulfate mg/l
99131 Inorganics, Major, Non-metals Silica, water, unfiltered, field, milligrams per liter USGS use and no use by EPA Total 7631-86-9 Silica mg/l
99141 Inorganics, Major, Non-metals Carbon dioxide, water, dissolved, in situ, milligrams per liter Not checked Total 124-38-9 mg/l
99220 Inorganics, Major, Non-metals Chloride, water, unfiltered, milligrams per liter USGS use and no use by EPA Total 16887-00-6 Chloride mg/l
99301 Inorganics, Major, Non-metals Chlorine residual, disinfection byproduct, water, unfiltered, milligrams per liter USGS use and no use by EPA Total 7782-50-5 Chlorine mg/l
99400 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, estimated by regression equation, milligrams per liter as calcium carbonate USGS use and no use by EPA Total Alkalinity mg/l CaCO3
99404 Inorganics, Major, Non-metals Chloride, water, filtered, estimated by regression equation, milligrams per liter USGS use and no use by EPA Dissolved 16887-00-6 Chloride mg/l
99405 Inorganics, Major, Non-metals Sulfate, water, filtered, estimated by regression equation, milligrams per liter USGS use and no use by EPA Dissolved 14808-79-8 Sulfate mg/l
99417 Inorganics, Major, Non-metals Acid neutralizing capacity, water, unfiltered, pounds per day USGS use and no use by EPA Total Alkalinity lb/day
99430 Inorganics, Major, Non-metals Carbonate, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter as calcium carbonate USGS use and no use by EPA Total 3812-32-6 Carbonate (CO3) mg/l CaCO3
99431 Inorganics, Major, Non-metals Alkalinity, water, filtered, Gran titration, field, microequivalents per liter USGS use and no use by EPA Dissolved Alkalinity ueq/L
99440 Inorganics, Major, Non-metals Bicarbonate, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter USGS use and no use by EPA Total 71-52-3 Bicarbonate mg/l
99445 Inorganics, Major, Non-metals Carbonate, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter USGS use and no use by EPA Total 3812-32-6 Carbonate (CO3) mg/l
99830 Inorganics, Major, Non-metals Hydroxide, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter USGS use and no use by EPA Total 14280-30-9 Hydroxide mg/l
99890 Inorganics, Major, Non-metals Sulfate, water, filtered, uncorrected, milligrams per liter USGS use and no use by EPA Dissolved 14808-79-8 Sulfate mg/l
99985 Inorganics, Major, Non-metals Dissolved oxygen, water, unfiltered, mid-depth of water column, milligrams per liter USGS use and no use by EPA Dissolved 7782-44-7 Dissolved oxygen (DO) mg/l