# # National Water Information System # 2024/11/21 # # # Date Retrieved: USGS Water Data for the Nation Help System # 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 10s 170s 26s 18s 0s 12s 12s 11s 0s 10s 27s 10s 00572 Biological Biomass, periphyton, ash weight, grams per square meter Not checked Ash Weight Biomass, periphyton g/m2 00573 Biological Biomass, periphyton, dry weight, grams per square meter Not checked Dry Biomass, periphyton g/m2 01371 Biological Average length of biological tissue samples in composite, centimeters Agree cm 01373 Biological Average weight of biological tissue samples in composite, grams Agree g 31720 Biological Bighead carp (Hypophthalmichthys nobilis), count of tagged fish per hour (count may include repeats of same fish) Not checked Total Hypophthalmichthys nobilis count/hr 31721 Biological Silver carp (Hypophthalmichthys molitrix), count of tagged fish per hour (count may include repeats of same fish) Not checked Total Hypophthalmichthys molitrix count/hr 31722 Biological Hybrid asian carp (Hypophthalmichthys nobliis and Hypophthalmichthys molitrix hybrids), count of tagged fish per hour (count may include repeats of same fish) Not checked Total count/hr 31723 Biological Sum of bighead, silver and hybrid carp, count of tagged fish per hour (count may include repeats of same fish) Not checked Total count/hr 31724 Biological Shovelnose sturgeon (Scaphirhynchus platorynchus), count of tagged fish per hour (count may include repeats of same fish) Not checked Total Scaphirhynchus platorynchus count/hr 31725 Biological Bighead carp (Hypophthalmichthys nobilis), count of unique tagged fish per hour (same fish are not counted more than once per hour) Not checked Total Hypophthalmichthys nobilis count/hr 31726 Biological Silver carp (Hypophthalmichthys molitrix), count of unique tagged fish per hour (same fish are not counted more than once per hour) Not checked Total Hypophthalmichthys molitrix count/hr 31727 Biological Hybrid asian carp (Hypophthalmichthys nobliis and Hypophthalmichthys molitrix hybrids), count of unique tagged fish per hour (same fish are not counted more than once per Not checked Total count/hr 31728 Biological Sum of bighead, silver and hybrid carp, count of unique tagged fish per hour (same fish are not counted more than once per hour) Not checked Total count/hr 31729 Biological Shovelnose sturgeon (Scaphirhynchus platorynchus), count of unique tagged fish per hour (same fish are not counted more than once per hour) Not checked Total Scaphirhynchus platorynchus count/hr 31733 Biological Chytrid fungus (Batrachochytrium dendrobatidis), water, quantitative polymerase chain reaction (qPCR) method, copies per milliliter Not checked Recoverable cp/mL 31924 Biological Bighead carp (Hypophthalmichthys nobilis) COI gene, water, DNA based, recoverable, copies per liter Not checked Recoverable Hypophthalmichthys nobilis cp/L 31925 Biological Silver carp (Hypophthalmichthys molitrix) COI gene, water, DNA based, recoverable, copies per liter Not checked Recoverable Hypophthalmichthys molitrix cp/L 31926 Biological Grass carp (Ctenopharyngodon idella) COI gene, water, DNA based, recoverable, copies per liter Not checked Recoverable cp/L 31927 Biological Black carp (Mylopharyngodon piceus) COI gene, water, DNA based, recoverable, copies per liter) Not checked Recoverable cp/L 31928 Biological Kidneyshell (Ptychobranchus fasciolaris) COI gene, water, DNA based, recoverable, copies per liter Not checked Recoverable cp/L 31929 Biological Prymnesium parvum ITS gene, water, DNA based, recoverable, copies per 100 milliliters Not checked Recoverable cp/100 mL 31930 Biological Maccaffertium pulchellum COI gene, water, DNA based, recoverable, copies per liter Not checked Recoverable cp/L 31931 Biological Chimera obscura COI gene, water, DNA based, recoverable, copies per liter Not checked Recoverable cp/L 31932 Biological Northern riffleshell (Epioblasma torulosa rangiana) COI gene, water, DNA based, recoverable, copies per liter Not checked Recoverable cp/L 32207 Biological Chlorophyll a, periphyton, narrow band fluorometric method, milligrams per square meter Not checked Total 479-61-8 Chlorophyll a mg/m2 32208 Biological Chlorophyll a, phytoplankton, narrow band fluorometric method, micrograms per liter Not checked Total 479-61-8 Chlorophyll a ug/l 32209 Biological Chlorophyll a, water, fluorometric method, corrected, micrograms per liter Agree 479-61-8 Chlorophyll a ug/l 32210 Biological Chlorophyll a, water, trichromatic method, uncorrected, micrograms per liter Agree Total 479-61-8 Chlorophyll a ug/l 32211 Biological Chlorophyll a, phytoplankton, spectrophotometric acid method, micrograms per liter Not checked 479-61-8 Chlorophyll a ug/l 32213 Biological Pheophytin a, fluorometric method, micrograms per liter Agree 603-17-8 Pheophytin a ug/l 32217 Biological Chlorophyll a, fluorometric method, uncorrected, micrograms per liter Agree 479-61-8 Chlorophyll a ug/l 32218 Biological Pheophytin a, phytoplankton, spectrophotometric acid method, micrograms per liter Not checked 603-17-8 Pheophytin a ug/l 32223 Biological Chlorophyll a, periphyton, spectrophotometric method, corrected, milligrams per square meter Not checked 479-61-8 Chlorophyll a mg/m2 32224 Biological Pheophytin a, periphyton, spectrophotometric acid method, milligrams per square meter Not checked 603-17-8 Pheophytin a mg/m2 32225 Biological Chlorophylls, periphyton, spectrophotometric method, uncorrected, milligrams per square meter Not checked 1406-65-1 Chlorophyll mg/m2 32226 Biological Chlorophyll b, periphyton, spectrophotometric method, uncorrected, milligrams per square meter Not checked 519-62-0 Chlorophyll b mg/m2 32227 Biological Chlorophyll c, periphyton, spectrophotometric method, uncorrected, milligrams per square meter Not checked 11003-45-5 Chlorophyll c mg/m2 32228 Biological Chlorophyll a, periphyton, spectrophotometric method, uncorrected, milligrams per square meter Not checked 479-61-8 Chlorophyll a mg/m2 32230 Biological Chlorophyll a, phytoplankton, spectrophotometric method, uncorrected, micrograms per liter Not checked 479-61-8 Chlorophyll a ug/l 32231 Biological Chlorophyll b, phytoplankton, spectrophotometric method, micrograms per liter Not checked 519-62-0 Chlorophyll b ug/l 32232 Biological Chlorophyll c, phytoplankton, spectrophotometric method, micrograms per liter Not checked 11003-45-5 Chlorophyll c ug/l 32234 Biological Chlorophylls, phytoplankton, spectrophotometric method, uncorrected, micrograms per liter Not checked 1406-65-1 Chlorophyll ug/l 32241 Biological Chlorophyll a, periphyton, fluorometric method, uncorrected, milligrams per square meter USGS use and no use by EPA 479-61-8 Chlorophyll a mg/m2 32242 Biological Chlorophyll a, periphyton, fluorometric method, corrected, milligrams per square meter USGS use and no use by EPA 479-61-8 Chlorophyll a mg/m2 32243 Biological Pheophytin a, periphyton, fluorometric method, milligrams per square meter USGS use and no use by EPA 603-17-8 Pheophytin a mg/m2 32268 Biological Pheophytin a, plankton in water, milligrams per cubic meter Not checked 603-17-8 mg/m3 32269 Biological Chlorophyll a, plankton in water, milligrams per cubic meter Not checked 479-61-8 mg/m3 32271 Biological Chlorophylls less than 35 microns, 35-um sieve prefilter, phytoplankton, fluorometric method, micrograms per liter USGS use and no use by EPA < 35 microns 1406-65-1 Chlorophyll ug/l 32272 Biological Chlorophyll a less than 35 microns, 35-um sieve prefilter, phytoplankton, fluorometric method, corrected, micrograms per liter USGS use and no use by EPA < 35 microns 479-61-8 Chlorophyll a ug/l 32273 Biological Pheophytin a less than 35 microns, 35-um sieve prefilter, phytoplankton, fluorometric method, micrograms per liter USGS use and no use by EPA < 35 microns 603-17-8 Pheophytin a ug/l 32274 Biological Chlorophylls less than 11 microns, 11-um sieve prefilter, phytoplankton, fluorometric method, micrograms per liter USGS use and no use by EPA < 11 microns 1406-65-1 Chlorophyll ug/l 32275 Biological Chlorophyll a less than 11 microns, 11-um sieve prefilter, phytoplankton, fluorometric method, corrected, micrograms per liter USGS use and no use by EPA < 11 microns 479-61-8 Chlorophyll a ug/l 32276 Biological Pheophytin a less than 11 microns, 11-um sieve prefilter, phytoplankton, fluorometric method, micrograms per liter USGS use and no use by EPA < 11 microns 603-17-8 Pheophytin a ug/l 32277 Biological Chlorophylls greater than 35 microns, calculated as chlorophylls (P32217) less chlorophylls <35 um (P32271), micrograms per liter USGS use and no use by EPA > 35 microns 1406-65-1 Chlorophyll ug/l 32278 Biological Chlorophyll a greater than 35 microns, calculated as chlorophyll a (P32209) less chlorophyll a <35 um (P32272), micrograms per liter USGS use and no use by EPA > 35 microns 479-61-8 Chlorophyll a ug/l 32279 Biological Pheophytin a greater than 35 microns, calculated as pheophytin a (P32213) less pheophytin a <35 um (P32273), micrograms per liter USGS use and no use by EPA > 35 microns 603-17-8 Pheophytin a ug/l 32280 Biological Chlorophylls greater than 11 microns, calculated as chlorophylls (P32217) less chlorophylls <11 um (P32274), micrograms per liter USGS use and no use by EPA > 11 microns 1406-65-1 Chlorophyll ug/l 32281 Biological Chlorophyll a greater than 11 microns, calculated as chlorophyll a (P32209) less chlorophyll a <11 um (P32275), micrograms per liter USGS use and no use by EPA > 11 microns 479-61-8 Chlorophyll a ug/l 32282 Biological Pheophytin a greater than 11 microns, calculated as pheophytin a (P32213) less pheophytin a <11 um (P32276), micrograms per liter USGS use and no use by EPA > 11 microns 603-17-8 Pheophytin a ug/l 32283 Biological Chlorophyll fluorescence (fChl), total, water, in situ, fluorometric, 650-700 nm, relative fluorescence units (RFU) Not checked 1406-65-1 Chlorophyll RFU 32284 Biological Chlorophyll a, total, in situ, fluorescence excitation at 370, 470, 525, 570, 590, 610 nm, fluorescence emission at 700 nm with correction for CDOM, ug/L Not checked Total 479-61-8 ug/l 32285 Biological Chlorophyll a, green algae, in situ, fluorescence excitation at 370, 470, 525, 570, 590, 610 nm, fluorescence emission at 700 nm with correction for CDOM, ug/L Not checked Total 479-61-8 ug/l 32286 Biological Chlorophyll a, cyanobacteria, in situ, fluorescence excitation at 370, 470, 525, 570, 590, 610 nm, fluorescence emission at 700 nm with correction for CDOM, ug/L Not checked Total 479-61-8 ug/l 32287 Biological Chlorophyll a, cryptophytes, in situ, fluorescence excitation at 370, 470, 525, 570, 590, 610 nm, fluorescence emission at 700 nm with correction for CDOM, ug/L Not checked Total 479-61-8 ug/l 32288 Biological Chlorophyll a, diatoms and dinoflagellates, in situ, excitation at 370, 470, 525, 570, 590, 610 nm, fluorescence emission at 700 nm with correction for CDOM, ug/L Not checked Total 479-61-8 ug/l 32317 Biological Chlorophyll a, water, in situ, concentration computed by regression of sensor data with field sample lab results, micrograms per liter as chlorophyll a Not checked Total 479-61-8 Chlorophyll a ug/l 32318 Biological Chlorophylls, water, in situ, fluorometric method, excitation at 470 +-15 nm, emission at 685 +-20 nm, micrograms per liter Not checked Total 1406-65-1 ug/l 32320 Biological Chlorophyll fluorescence (fChl), water, in situ, fluorometric method, excitation at 470 +-15 nm, emission at 685 +-20 nm, relative fluorescence units (RFU) Not checked Total 1406-65-1 RFU 32329 Biological Phycocyanin (PC), water, in situ, concentration computed by regression of sensor data with field sample lab results, micrograms per liter Not checked Total ug/l 32334 Biological Chlorophyll, water, in situ, uncorrected for degradation products, computed by regression of sensor data with sample lab results, micrograms per liter as chlorophyll Not checked Total 1406-65-1 ug/l 32735 Biological Chlorophyll a, phytoplankton, water, acetone extraction and spectrophotometry, milligrams per liter Not checked Total 479-61-8 mg/l 32736 Biological Pheophytin a, phytoplankton, water, acetone extraction and spectrophotometry, micrograms per liter Not checked Total 603-17-8 ug/l 32737 Biological Chlorophyll a, phytoplankton, water, filtered (5 micron filter), chromatographic-fluorometric method, micrograms per liter Not checked Dissolved ug/l 32738 Biological Pheophytin a, phytoplankton, water, filtered (5 micron filter), micrograms per liter Not checked Dissolved ug/l 47462 Biological Females, in sample or catch, number Agree nu 47463 Biological Males, in sample or catch, number Agree nu 49273 Biological Moisture content, biota, tissue, dry weight, percent Not agree Dry % 49491 Biological Moisture content, biota, whole organism, wet weight, percent Not agree Wet Recoverable Moisture content % 49953 Biological Biomass, phytoplankton, ash free dry mass, milligrams per liter Agree Ash-Free Dry Biomass, phytoplankton mg/l 49954 Biological Biomass, periphyton, ash free dry mass, grams per square meter Agree Ash-Free Dry Biomass, periphyton g/m2 51754 Biological Cyanobacteria 16S gene, water, DNA based, recoverable, copies per 100 milliliters Not checked Total cp/100 mL 51755 Biological Microcystis 16S gene, water, DNA based, recoverable, copies per 100 milliliters Not checked Total cp/100 mL 51756 Biological Microcystis-specific microcystin gene mcyE, water, DNA based, recoverable, copies per 100 milliliters Not checked Total cp/100 mL 51757 Biological Microcystis-specific microcystin gene mcyE, water, RNA based, recoverable, copies per 100 milliliters Not checked Total cp/100 mL 51758 Biological Dolichospermum-specific microcystin gene mcyE, water, DNA based, copies per 100 milliliters Not checked Total cp/100 mL 51759 Biological Dolichospermum-specific microcystin gene mcyE, water, RNA based, copies per 100 milliliters Not checked Total cp/100 mL 51760 Biological Planktothrix-specific microcystin gene mcyE, water, DNA based, recoverable, copies per 100 milliliters Not checked Total cp/100 mL 51761 Biological Planktothrix-specific microcystin gene mcyE, water, RNA based, recoverable, copies per 100 milliliters Not checked Total cp/100 mL 52885 Biological BLYES (bioluminescent yeast estrogen screen) Estrogen Equivalent, water, filtered, pH-adjusted, nanograms per liter of estrogen equivalents (EEQ) Not checked Dissolved ng/l 52905 Biological Phycocyanins, water, filtered, recoverable, micrograms per liter Not checked Dissolved 11016-15-2 ug/l 52906 Biological Allophycocyanin, water, filtered, recoverable, micrograms per liter Not checked Dissolved ug/l 52907 Biological Phycoerythrin, water, filtered, recoverable, micrograms per liter Not checked Dissolved 18097-67-1 ug/l 54180 Biological Pheophytin a, sediment, phytoplankton, micrograms per liter Not checked Recoverable 603-17-8 ug/l 54181 Biological Chlorophyll a, sediment, phytoplankton, micrograms per liter Not checked Recoverable 479-61-8 ug/l 54182 Biological Pheophytin a, sediment, periphyton, milligrams per square meter Not checked Recoverable 603-17-8 mg/m2 54183 Biological Chlorophyll a, sediment, periphyton, milligrams per square meter Not checked Recoverable 479-61-8 mg/m2 54184 Biological Chlorophyll a, sediment, periphyton, richest-targeted habitat (RTH), milligrams per square meter Not checked Recoverable 479-61-8 mg/m2 54185 Biological Pheophytin a, sediment, periphyton, richest-targeted habitat (RTH), milligrams per square meter Not checked Recoverable 603-17-8 mg/m2 60050 Biological Phytoplankton, total, cells per milliliter Not checked Total Phytoplankton #/ml 62340 Biological Specimen length, average of composite, biota, millimeters USGS use and no use by EPA Mean mm 62341 Biological Specimen length, total of composite, biota, millimeters USGS use and no use by EPA Total mm 62342 Biological Specimen weight, average of composite, biota, grams USGS use and no use by EPA Mean g 62343 Biological Specimen weight, total of composite, biota, grams USGS use and no use by EPA Total g 62344 Biological Standard fish length, average of composite, biota, millimeters USGS use and no use by EPA Mean Fish standard length mm 62345 Biological Standard fish length, total of composite, biota, millimeters USGS use and no use by EPA Total Fish standard length mm 62346 Biological Individuals without anomalies, biota, number in sample USGS use and no use by EPA nu 62347 Biological Individuals with popeye disease, biota, number in sample USGS use and no use by EPA nu 62348 Biological Individuals with blindness, excluding popeye disease, biota, number in sample USGS use and no use by EPA nu 62349 Biological Individuals with external deformities, biota, number in sample USGS use and no use by EPA nu 62350 Biological Individuals with eroded fins, biota, number in sample USGS use and no use by EPA nu 62351 Biological Individuals with external lesions or ulcers, biota, number in sample USGS use and no use by EPA nu 62352 Biological Individuals with fungus, biota, number in sample USGS use and no use by EPA nu 62353 Biological Individuals with leeches, biota, number in sample USGS use and no use by EPA nu 62354 Biological Individuals with black spot, biota, number in sample USGS use and no use by EPA nu 62355 Biological Individuals with anchor worms, biota, number in sample USGS use and no use by EPA nu 62356 Biological Individuals with external tumors, biota, number in sample USGS use and no use by EPA nu 62357 Biological Individuals with ich, biota, number in sample USGS use and no use by EPA nu 62358 Biological Individuals with other external parasites, biota, number in sample USGS use and no use by EPA nu 62359 Biological Pheophytin a, periphyton, milligrams per square meter USGS use and no use by EPA 603-17-8 Pheophytin a mg/m2 62360 Biological Pheophytin a, phytoplankton, micrograms per liter USGS use and no use by EPA 603-17-8 Pheophytin a ug/l 62361 Biological Chlorophyll, total, water, fluorometric, 650-700 nanometers, in situ sensor, micrograms per liter USGS use and no use by EPA Total 1406-65-1 Chlorophyll ug/l 62886 Biological Mean age of organisms in composite sample, years USGS use and no use by EPA Mean years 62887 Biological Minimum age of organisms in composite sample, years USGS use and no use by EPA Minimum years 62888 Biological Maximum age of organisms in composite sample, years USGS use and no use by EPA Maximum years 63763 Biological Chlorophyll a, periphyton, depositional-targeted habitat (DTH), chromatographic-fluorometric method, milligrams per square meter USGS use and no use by EPA 479-61-8 Chlorophyll a mg/m2 63764 Biological Pheophytin a, periphyton, depositional-targeted habitat (DTH), chromatographic-fluorometric method, milligrams per square meter USGS use and no use by EPA 603-17-8 Pheophytin a mg/m2 63765 Biological Biomass, periphyton, ash weight, depositional-targeted habitat (DTH), grams per square meter USGS use and no use by EPA Ash Weight Biomass, periphyton g/m2 63766 Biological Biomass, periphyton, ash free dry weight, depositional-targeted habitat (DTH), grams per square meter USGS use and no use by EPA Ash-Free Dry Biomass, periphyton g/m2 63767 Biological Biomass, periphyton, dry weight, depositional-targeted habitat (DTH), grams per square meter USGS use and no use by EPA Dry Biomass, periphyton g/m2 65228 Biological Chlorophyll b, water, unfiltered, trichromatic method, uncorrected, micrograms per liter USGS use and no use by EPA Total 519-62-0 Chlorophyll b ug/l 65229 Biological Chlorophyll c, water, unfiltered, trichromatic method, uncorrected, micrograms per liter USGS use and no use by EPA Total 11003-45-5 Chlorophyll c ug/l 65230 Biological Chlorophyll a, water, in situ, in vivo fluorescence, in vivo fluorescence units USGS use and no use by EPA Total 479-61-8 Chlorophyll a IVFU 65231 Biological Chlorophyll a, water, in situ, in vivo fluorescence, micrograms per liter USGS use and no use by EPA 479-61-8 Chlorophyll a ug/l 70940 Biological Invertebrates, benthic, wet weight, grams per square meter Agree Wet g/m2 70941 Biological Invertebrates, benthic, dry weight, grams per square meter Agree Dry g/m2 70942 Biological Invertebrates, benthic, ash weight, grams per square meter Agree Ash Weight g/m2 70943 Biological Invertebrates, benthic, organisms per square meter Agree #/m2 70945 Biological Periphyton, total, number of cells per square millimeter Agree Total Periphyton cells/mm2 70946 Biological Zooplankton, total, number of organisms per cubic meter Agree Total Zooplankton #/m3 70949 Biological Biomass to chlorophyll ratio, plankton, number Agree None 70950 Biological Biomass to chlorophyll ratio, periphyton, number Agree None 70951 Biological Chlorophyll a, phytoplankton, chromatographic-spectrophotometric method, micrograms per liter Not checked 479-61-8 Chlorophyll a ug/l 70952 Biological Chlorophyll b, phytoplankton, chromatographic-spectrophotometric method, micrograms per liter Agree 519-62-0 Chlorophyll b ug/l 70953 Biological Chlorophyll a, phytoplankton, chromatographic-fluorometric method, micrograms per liter Agree 479-61-8 Chlorophyll a ug/l 70954 Biological Chlorophyll b, phytoplankton, chromatographic-fluorometric method, micrograms per liter Agree 519-62-0 Chlorophyll b ug/l 70955 Biological Chlorophyll a, periphyton, chromatographic-spectrophotometric method, milligrams per square meter Not agree 479-61-8 Chlorophyll a mg/m2 70956 Biological Chlorophyll b, periphyton, chromatographic-spectrophotometric method, milligrams per square meter Not agree 519-62-0 Chlorophyll b mg/m2 70957 Biological Chlorophyll a, periphyton, chromatographic-fluorometric method, milligrams per square meter Not agree 479-61-8 Chlorophyll a mg/m2 70958 Biological Chlorophyll b, periphyton, chromatographic-fluorometric method, milligrams per square meter Not agree 519-62-0 Chlorophyll b mg/m2 70959 Biological Productivity, primary, gross, milligrams oxygen per cubic meter per day Agree mg O2/m3/d 70962 Biological Productivity, primary, gross, milligrams carbon per square meter per day Agree mg C/m2/d 70963 Biological Productivity, primary, net, milligrams oxygen per cubic meter per day Agree mg O2/m3/d 70964 Biological Productivity, primary, net, milligrams oxygen per square meter per day Agree mg O2/m2/d 70965 Biological Productivity, primary, net, milligrams carbon per cubic meter per day Agree mg C/m3/d 70966 Biological Productivity, primary, net, milligrams carbon per square meter per day Agree mg C/m2/d 70967 Biological Respiration, milligrams oxygen per cubic meter per day Agree Respiration mg O2/m3/d 70968 Biological Respiration, milligrams oxygen per square meter per day Agree Respiration mg O2/m2/d 70988 Biological Algal growth potential, milligrams per liter Not checked Algal growth potential mg/l 71100 Biological Seston, water, unfiltered, dry weight, milligrams per liter Agree Dry Total Seston mg/l 71101 Biological Seston, water, unfiltered, ash weight, milligrams per liter Not checked Ash Weight Total Seston mg/l 72140 Biological Length of organism, maximum in composite sample, centimeters USGS use and no use by EPA Maximum cm 72141 Biological Length of organisms, standard deviation, composite sample, centimeters USGS use and no use by EPA Standard Deviation cm 72142 Biological Weight of organism, minimum in composite sample, grams USGS use and no use by EPA Minimum g 72143 Biological Weight of organism, maximum in composite sample, grams USGS use and no use by EPA Maximum g 72144 Biological Weight of organisms, standard deviation, composite sample, grams USGS use and no use by EPA Standard Deviation g 72146 Biological Length of organism, minimum in composite sample, centimeters USGS use and no use by EPA Minimum cm 72273 Biological Length of organism, millimeters Not checked mm 81353 Biological Biomass, plankton, ash weight, milligrams per liter Agree Ash Weight Biomass, plankton mg/l 81354 Biological Biomass, plankton, dry weight, milligrams per liter Agree Dry Biomass, plankton mg/l 81614 Biological Individuals in sample, biota, number Agree nu 81804 Biological Diatoms, periphyton, number per square millimeter Agree number/mm2 83562 Biological Chlorophyll fluorescence (fChl) load, water, in situ, micrograms per second as chlorophyll Not checked Total 1406-65-1 ug/s 84015 Biological Age of organism, years Agree years 85209 Biological Algal growth potential, USGS modified bottle test, water, filtered, milligrams per liter Not checked Dissolved Algal growth potential mg/l 85822 Biological Moisture content, biota, tissue, wet weight, percent of total weight Agree Wet Moisture content % 91104 Biological Weight of organism, total, grams USGS use and no use by EPA Total g 91105 Biological Weight of sampled tissue from organism, grams USGS use and no use by EPA g 91106 Biological Length of organism, centimeters USGS use and no use by EPA cm 92209 Biological Chlorophyll a, fluorometric method, corrected, area weighted average, micrograms per liter USGS use and no use by EPA 479-61-8 Chlorophyll a ug/l 92213 Biological Pheophytin a, fluorometric method, area weighted average, micrograms per liter USGS use and no use by EPA 603-17-8 Pheophytin a ug/l 92217 Biological Chlorophyll a, fluorometric method, uncorrected, area weighted average, micrograms per liter USGS use and no use by EPA 479-61-8 Chlorophyll a ug/l 94423 Biological Dreissena Beneden, 1835, count Not checked Total count 94424 Biological Dreissena polymorpha (Pallas, 1771) adults, number per square meter Not checked Total Dreissena polymorpha #/m2 94425 Biological Dreissena polymorpha (Pallas, 1771) larvae, number per liter Not checked Total Dreissena polymorpha #/l 94426 Biological Dreissena bugensis Andrusov, 1897 adults, number per square meter Not checked Total #/m2 94427 Biological Dreissena bugensis Andrusov, 1897 larvae, number per liter Not checked Total #/l 94428 Biological Zebra mussel Dreissena polymorpha (Pallas, 1771) rDNA ITS 2 gene, water, DNA based, recoverable, copies per liter Not checked Recoverable Dreissena polymorpha cp/L 94429 Biological Zebra mussel Dreissena polymorpha (Pallas, 1771) shell length, larvae, average, micrometers Not checked Mean Dreissena polymorpha um 94430 Biological Zebra mussel Dreissena polymorpha (Pallas, 1771) shell length, adult, average, millimeters Not checked Mean Dreissena polymorpha mm 94431 Biological Quagga mussel Dreissena bugensis Andrusov, 1897 rDNA ITS 2 gene, water, DNA based, recoverable, copies per liter Not checked Recoverable cp/L 94432 Biological Quagga mussel Dreissena bugensis Andrusov, 1897 shell length, larvae, average, micrometers Not checked Mean um 94433 Biological Quagga mussel Dreissena bugensis Andrusov, 1897 shell length, adult, average, millimeters Not checked Mean mm 95201 Biological Cyanobacteria (blue-green algae), Hydrolab in vivo fluorescence of phycocyanin, excitation at 590 nm, emission at 650 nm, cells per milliliter USGS use and no use by EPA #/ml 95203 Biological Phycocyanins (cyanobacteria), Turner Designs SCUFA in vivo fluorescence of phycocyanin, excitation at 595 nm, emission at 670 nm, micrograms per liter USGS use and no use by EPA ug/l 95204 Biological Phycocyanins (cyanobacteria), water, in situ, in vivo fluorescence, in vivo fluorescence units USGS use and no use by EPA IVFU 99421 Biological Chlorophyll a, water, in situ, regression computed, pounds per day as chlorophyll a USGS use and no use by EPA Total 479-61-8 Chlorophyll lb/day