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Water Quality Samples for Washington

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! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024
with a full decommission expected 6 months later. Learn more about the upcoming change and where to find the new samples data in our blog.

USGS 12447390 ANDREWS CREEK NEAR MAZAMA, WA

Okanogan County, Washington
Hydrologic Unit Code 17020008
Latitude  48°49'23", Longitude 120°08'41" NAD27
Drainage area 22.1  square miles
Gage datum 4,300.00 feet above NGVD29
Output formats
Parameter Group Period of Record table
Inventory of available water-quality data for printing
Inventory of water-quality data with retrieval
Tab-separated data, one result per row
Tab-separated data one sample per row with remark codes combined with values
Tab-separated data one sample per row with tab-delimiter for remark codes
Reselect output format
Parameter
Code		 Count Begin
Date		 End
Date		 Parameter Code Complete Name
00004 2 2001-09-17   Stream width, feet
00008 4 2001-09-17   Sample accounting number
00010 296 2001-09-17   Temperature, water, degrees Celsius
00020 73 2001-09-17   Temperature, air, degrees Celsius
00025 48 2001-09-17   Barometric pressure, millimeters of mercury
00028 156 2001-09-17   Agency analyzing sample, code
00029 1 2001-09-17   Project number
00060 12 2001-09-17   Discharge, cubic feet per second
00061 270 2001-09-17   Discharge, instantaneous, cubic feet per second
00063 1 2001-09-17   Number of sampling points, count
00065 92 2001-09-17   Gage height, feet
00076 54 2001-09-17   Turbidity, water, unfiltered, nephelometric turbidity units
00080 11 2001-09-17   Color, water, filtered, platinum cobalt units
00095 168 2001-09-17   Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
00191 166 2001-09-17   Hydrogen ion, water, unfiltered, calculated, milligrams per liter
00300 160 2001-09-17   Dissolved oxygen, water, unfiltered, milligrams per liter
00301 46 2001-09-17   Dissolved oxygen, water, unfiltered, percent of saturation
00310 9 2001-09-17   Biochemical oxygen demand, water, unfiltered, 5 days at 20 degrees Celsius, milligrams per liter
00400 166 2001-09-17   pH, water, unfiltered, field, standard units
00403 130 2001-09-17   pH, water, unfiltered, laboratory, standard units
00405 165 2001-09-17   Carbon dioxide, water, unfiltered, milligrams per liter
00408 66 2001-09-17   pH, water, filtered, laboratory, standard units
00410 105 2001-09-17   Acid neutralizing capacity, water, unfiltered, fixed endpoint (pH 4.5) titration, field, milligrams per liter as calcium carbonate
00419 8 2001-09-17   Acid neutralizing capacity, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter as calcium carbonate
00440 65 2001-09-17   Bicarbonate, water, unfiltered, fixed endpoint (pH 4.5) titration, field, milligrams per liter
00445 60 2001-09-17   Carbonate, water, unfiltered, fixed endpoint (pH 8.3) titration, field, milligrams per liter
00447 8 2001-09-17   Carbonate, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter
00450 8 2001-09-17   Bicarbonate, water, unfiltered, inflection-point titration method (incremental titration method), field, milligrams per liter
00452 35 2001-09-17   Carbonate, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter
00453 35 2001-09-17   Bicarbonate, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter
00515 7 2001-09-17   Dissolved solids dried at 105 degrees Celsius, water, filtered, milligrams per liter
00530 7 2001-09-17   Suspended solids, water, unfiltered, milligrams per liter
00572 5 2001-09-17   Biomass, periphyton, ash weight, grams per square meter
00573 5 2001-09-17   Biomass, periphyton, dry weight, grams per square meter
00600 107 2001-09-17   Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, unfiltered, milligrams per liter
00602 26 2001-09-17   Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, filtered, milligrams per liter
00605 82 2001-09-17   Organic nitrogen, water, unfiltered, milligrams per liter as nitrogen
00607 86 2001-09-17   Organic nitrogen, water, filtered, milligrams per liter as nitrogen
00608 141 2001-09-17   Ammonia (NH3 + NH4+), water, filtered, milligrams per liter as nitrogen
00610 57 2001-09-17   Ammonia (NH3 + NH4+), water, unfiltered, milligrams per liter as nitrogen
00613 100 2001-09-17   Nitrite, water, filtered, milligrams per liter as nitrogen
00615 9 2001-09-17   Nitrite, water, unfiltered, milligrams per liter as nitrogen
00618 100 2001-09-17   Nitrate, water, filtered, milligrams per liter as nitrogen
00620 9 2001-09-17   Nitrate, water, unfiltered, milligrams per liter as nitrogen
00623 24 2001-09-17   Ammonia plus organic nitrogen, water, filtered, milligrams per liter as nitrogen
00624 19 2001-09-17   Ammonia plus organic nitrogen, suspended sediment, total, milligrams per liter as nitrogen
00625 82 2001-09-17   Ammonia plus organic nitrogen, water, unfiltered, milligrams per liter as nitrogen
00630 113 2001-09-17   Nitrate plus nitrite, water, unfiltered, milligrams per liter as nitrogen
00631 213 2001-09-17   Nitrate plus nitrite, water, filtered, milligrams per liter as nitrogen
00650 13 2001-09-17   Phosphate, water, unfiltered, milligrams per liter as PO4
00660 123 2001-09-17   Orthophosphate, water, filtered, milligrams per liter as PO4
00665 190 2001-09-17   Phosphorus, water, unfiltered, milligrams per liter as phosphorus
00666 78 2001-09-17   Phosphorus, water, filtered, milligrams per liter as phosphorus
00671 123 2001-09-17   Orthophosphate, water, filtered, milligrams per liter as phosphorus
00680 22 2001-09-17   Organic carbon, water, unfiltered, milligrams per liter
00681 125 2001-09-17   Organic carbon, water, filtered, milligrams per liter
00689 3 2001-09-17   Organic carbon, suspended sediment, total, milligrams per liter
00694 26 2001-09-17   Carbon [inorganic plus organic], suspended sediment, total, milligrams per liter
00720 18 2001-09-17   Cyanide, water, unfiltered, milligrams per liter
00900 292 2001-09-17   Hardness, water, milligrams per liter as calcium carbonate
00902 90 2001-09-17   Noncarbonate hardness, water, unfiltered, field, milligrams per liter as calcium carbonate
00904 2 2001-09-17   Noncarbonate hardness, water, filtered, field, milligrams per liter as calcium carbonate
00905 2 2001-09-17   Noncarbonate hardness, water, filtered, lab, milligrams per liter as calcium carbonate
00915 292 2001-09-17   Calcium, water, filtered, milligrams per liter
00925 292 2001-09-17   Magnesium, water, filtered, milligrams per liter
00930 290 2001-09-17   Sodium, water, filtered, milligrams per liter
00931 290 2001-09-17   Sodium adsorption ratio (SAR), water, number
00932 288 2001-09-17   Sodium fraction of cations, water, percent in equivalents of major cations
00933 8 2001-09-17   Sodium plus potassium, water, filtered, milligrams per liter as sodium
00935 290 2001-09-17   Potassium, water, filtered, milligrams per liter
00940 293 2001-09-17   Chloride, water, filtered, milligrams per liter
00945 293 2001-09-17   Sulfate, water, filtered, milligrams per liter
00950 227 2001-09-17   Fluoride, water, filtered, milligrams per liter
00955 292 2001-09-17   Silica, water, filtered, milligrams per liter as SiO2
01000 36 2001-09-17   Arsenic, water, filtered, micrograms per liter
01001 4 2001-09-17   Arsenic, suspended sediment, total, micrograms per liter
01002 21 2001-09-17   Arsenic, water, unfiltered, micrograms per liter
01005 53 2001-09-17   Barium, water, filtered, micrograms per liter
01006 5 2001-09-17   Barium, suspended sediment, recoverable, micrograms per liter
01007 20 2001-09-17   Barium, water, unfiltered, recoverable, micrograms per liter
01010 35 2001-09-17   Beryllium, water, filtered, micrograms per liter
01025 35 2001-09-17   Cadmium, water, filtered, micrograms per liter
01026 1 2001-09-17   Cadmium, suspended sediment, recoverable, micrograms per liter
01027 20 2001-09-17   Cadmium, water, unfiltered, micrograms per liter
01030 35 2001-09-17   Chromium, water, filtered, micrograms per liter
01031 3 2001-09-17   Chromium, suspended sediment, recoverable, micrograms per liter
01034 21 2001-09-17   Chromium, water, unfiltered, recoverable, micrograms per liter
01035 53 2001-09-17   Cobalt, water, filtered, micrograms per liter
01040 37 2001-09-17   Copper, water, filtered, micrograms per liter
01041 1 2001-09-17   Copper, suspended sediment, recoverable, micrograms per liter
01042 20 2001-09-17   Copper, water, unfiltered, recoverable, micrograms per liter
01044 5 2001-09-17   Iron, suspended sediment, recoverable, micrograms per liter
01045 20 2001-09-17   Iron, water, unfiltered, recoverable, micrograms per liter
01046 55 2001-09-17   Iron, water, filtered, micrograms per liter
01049 38 2001-09-17   Lead, water, filtered, micrograms per liter
01050 1 2001-09-17   Lead, suspended sediment, recoverable, micrograms per liter
01051 20 2001-09-17   Lead, water, unfiltered, recoverable, micrograms per liter
01054 5 2001-09-17   Manganese, suspended sediment, recoverable, micrograms per liter
01055 18 2001-09-17   Manganese, water, unfiltered, recoverable, micrograms per liter
01056 55 2001-09-17   Manganese, water, filtered, micrograms per liter
01060 53 2001-09-17   Molybdenum, water, filtered, micrograms per liter
01065 47 2001-09-17   Nickel, water, filtered, micrograms per liter
01075 53 2001-09-17   Silver, water, filtered, micrograms per liter
01076 5 2001-09-17   Silver, suspended sediment, recoverable, micrograms per liter
01077 20 2001-09-17   Silver, water, unfiltered, recoverable, micrograms per liter
01080 53 2001-09-17   Strontium, water, filtered, micrograms per liter
01085 53 2001-09-17   Vanadium, water, filtered, micrograms per liter
01090 37 2001-09-17   Zinc, water, filtered, micrograms per liter
01091 5 2001-09-17   Zinc, suspended sediment, recoverable, micrograms per liter
01092 20 2001-09-17   Zinc, water, unfiltered, recoverable, micrograms per liter
01106 47 2001-09-17   Aluminum, water, filtered, micrograms per liter
01130 53 2001-09-17   Lithium, water, filtered, micrograms per liter
01145 52 2001-09-17   Selenium, water, filtered, micrograms per liter
01146 4 2001-09-17   Selenium, suspended sediment, total, micrograms per liter
01147 21 2001-09-17   Selenium, water, unfiltered, micrograms per liter
01300 1 2001-09-17   Oil and grease, severity, code
01305 1 2001-09-17   Suds or foam, severity, code
01320 1 2001-09-17   Floating garbage, severity, code
01325 1 2001-09-17   Floating algae mats, severity, code
01330 1 2001-09-17   Odor, atmospheric, severity, code
01340 1 2001-09-17   Dead fish, severity, code
01345 1 2001-09-17   Floating debris, severity, code
01350 1 2001-09-17   Turbidity, severity, code
01515 4 2001-09-17   Gross alpha radioactivity, water, filtered, natural uranium curve, picocuries per liter
01516 4 2001-09-17   Gross alpha radioactivity, suspended sediment, natural uranium curve, picocuries per liter
03515 29 2001-09-17   Gross beta radioactivity, water, filtered, Cs-137 curve, picocuries per liter
03516 29 2001-09-17   Gross beta radioactivity, suspended sediment, Cs-137 curve, picocuries per liter
04126 3 2001-09-17   Alpha radioactivity, water, filtered, Th-230 curve, picocuries per liter
04127 3 2001-09-17   Alpha radioactivity, suspended sediment, Th-230 curve, picocuries per liter
09511 34 2001-09-17   Radium-226, water, filtered, radon method, picocuries per liter
22703 16 2001-09-17   Uranium (natural), water, filtered, micrograms per liter
29803 51 2001-09-17   Alkalinity, water, filtered, Gran titration, laboratory, milligrams per liter as calcium carbonate
30207 92 2001-09-17   Gage height, above datum, meters
30208 12 2001-09-17   Discharge, cubic meters per second
30209 270 2001-09-17   Discharge, instantaneous, cubic meters per second
31501 81 2001-09-17   Total coliforms, M-Endo MF method, immediate, water, colony forming units per 100 milliliters
31616 34 2001-09-17   Fecal coliforms, M-FC MF (0.45 micron) method, water, colony forming units per 100 milliliters
31625 116 2001-09-17   Fecal coliforms, M-FC MF (0.7 micron) method, water, colony forming units per 100 milliliters
31673 113 2001-09-17   Fecal streptococci, KF streptococcus MF method, water, colony forming units per 100 milliliters
31679 34 2001-09-17   Fecal streptococci, m-Enterococcus MF method, water, colonies per 100 milliliters
31751 1 2001-09-17   Bacteria, total plate count, TPC agar, 35 degrees Celsius, 24 hours, water, colonies per milliliter
39034 4 2001-09-17   p,p'-Ethyl-DDD, water, unfiltered, recoverable, micrograms per liter
39086 35 2001-09-17   Alkalinity, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter as calcium carbonate
39087 66 2001-09-17   Alkalinity, water, filtered, inflection-point titration method (incremental titration method), laboratory, milligrams per liter as calcium carbonate
39250 5 2001-09-17   Polychlorinated naphthalenes, water, unfiltered, recoverable, micrograms per liter
39251 2 2001-09-17   Polychlorinated naphthalenes, bed sediment, recoverable, dry weight, micrograms per kilogram
39330 10 2001-09-17   Aldrin, water, unfiltered, recoverable, micrograms per liter
39333 5 2001-09-17   Aldrin, bed sediment, recoverable, dry weight, micrograms per kilogram
39340 10 2001-09-17   Lindane, water, unfiltered, recoverable, micrograms per liter
39343 5 2001-09-17   Lindane, bed sediment, recoverable, dry weight, micrograms per kilogram
39350 10 2001-09-17   Chlordane (technical), water, unfiltered, recoverable, micrograms per liter
39351 5 2001-09-17   Chlordane (technical), bed sediment, recoverable, dry weight, micrograms per kilogram
39360 10 2001-09-17   p,p'-DDD, water, unfiltered, recoverable, micrograms per liter
39363 5 2001-09-17   p,p'-DDD, bed sediment, recoverable, dry weight, micrograms per kilogram
39365 10 2001-09-17   p,p'-DDE, water, unfiltered, recoverable, micrograms per liter
39368 5 2001-09-17   p,p'-DDE, bed sediment, recoverable, dry weight, micrograms per kilogram
39370 10 2001-09-17   p,p'-DDT, water, unfiltered, recoverable, micrograms per liter
39373 5 2001-09-17   p,p'-DDT, bed sediment, recoverable, dry weight, micrograms per kilogram
39380 10 2001-09-17   Dieldrin, water, unfiltered, recoverable, micrograms per liter
39383 5 2001-09-17   Dieldrin, bed sediment, recoverable, dry weight, micrograms per kilogram
39388 6 2001-09-17   alpha-Endosulfan, water, unfiltered, recoverable, micrograms per liter
39389 2 2001-09-17   alpha-Endosulfan, bed sediment, recoverable, dry weight, micrograms per kilogram
39390 10 2001-09-17   Endrin, water, unfiltered, recoverable, micrograms per liter
39393 5 2001-09-17   Endrin, bed sediment, recoverable, dry weight, micrograms per kilogram
39398 6 2001-09-17   Ethion, water, unfiltered, recoverable, micrograms per liter
39400 7 2001-09-17   Toxaphene, water, unfiltered, recoverable, micrograms per liter
39403 3 2001-09-17   Toxaphene, bed sediment, recoverable, dry weight, micrograms per kilogram
39410 10 2001-09-17   Heptachlor, water, unfiltered, recoverable, micrograms per liter
39413 5 2001-09-17   Heptachlor, bed sediment, recoverable, dry weight, micrograms per kilogram
39420 10 2001-09-17   Heptachlor epoxide, water, unfiltered, recoverable, micrograms per liter
39423 5 2001-09-17   Heptachlor epoxide, bed sediment, recoverable, dry weight, micrograms per kilogram
39480 3 2001-09-17   p,p'-Methoxychlor, water, unfiltered, recoverable, micrograms per liter
39481 2 2001-09-17   p,p'-Methoxychlor, bed sediment, recoverable, dry weight, micrograms per kilogram
39516 9 2001-09-17   PCBs, water, unfiltered, recoverable, micrograms per liter
39519 4 2001-09-17   PCBs, bed sediment, recoverable, dry weight, micrograms per kilogram
39530 10 2001-09-17   Malathion, water, unfiltered, recoverable, micrograms per liter
39531 1 2001-09-17   Malathion, bed sediment, recoverable, dry weight, micrograms per kilogram
39540 10 2001-09-17   Parathion, water, unfiltered, recoverable, micrograms per liter
39541 1 2001-09-17   Parathion, bed sediment, recoverable, dry weight, micrograms per kilogram
39570 10 2001-09-17   Diazinon, water, unfiltered, recoverable, micrograms per liter
39600 10 2001-09-17   Methyl parathion, water, unfiltered, recoverable, micrograms per liter
39601 1 2001-09-17   Methyl parathion, bed sediment, recoverable, dry weight, micrograms per kilogram
39730 7 2001-09-17   2,4-D, water, unfiltered, recoverable, micrograms per liter
39740 7 2001-09-17   2,4,5-T, water, unfiltered, recoverable, micrograms per liter
39755 5 2001-09-17   Mirex, water, unfiltered, recoverable, micrograms per liter
39758 2 2001-09-17   Mirex, bed sediment, recoverable, dry weight, micrograms per kilogram
39760 7 2001-09-17   Silvex, water, unfiltered, recoverable, micrograms per liter
39786 6 2001-09-17   Carbophenothion, water, unfiltered, recoverable, micrograms per liter
39790 6 2001-09-17   Methyl trithion, water, unfiltered, recoverable, micrograms per liter
49570 26 2001-09-17   Particulate nitrogen, suspended in water, milligrams per liter
49954 5 2001-09-17   Biomass, periphyton, ash free dry mass, grams per square meter
50280 124 2001-09-17   Site visit purpose, code
62359 5 2001-09-17   Pheophytin a, periphyton, milligrams per square meter
62854 122 2001-09-17   Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, filtered, analytically determined, milligrams per liter
70300 225 2001-09-17   Dissolved solids dried at 180 degrees Celsius, water, filtered, milligrams per liter
70301 282 2001-09-17   Dissolved solids, water, filtered, sum of constituents, milligrams per liter
70302 272 2001-09-17   Dissolved solids, water, short tons per day
70303 293 2001-09-17   Dissolved solids, water, filtered, short tons per acre-foot
70507 10 2001-09-17   Orthophosphate, water, unfiltered, milligrams per liter as phosphorus
70950 5 2001-09-17   Biomass to chlorophyll ratio, periphyton, number
70957 5 2001-09-17   Chlorophyll a, periphyton, chromatographic-fluorometric method, milligrams per square meter
71845 57 2001-09-17   Ammonia (NH3 + NH4+), water, unfiltered, milligrams per liter as NH4
71846 141 2001-09-17   Ammonia (NH3 + NH4+), water, filtered, milligrams per liter as NH4
71851 100 2001-09-17   Nitrate, water, filtered, milligrams per liter as nitrate
71856 100 2001-09-17   Nitrite, water, filtered, milligrams per liter as nitrite
71870 1 2001-09-17   Bromide, water, filtered, milligrams per liter
71886 34 2001-09-17   Phosphorus, water, unfiltered, milligrams per liter as PO4
71887 35 2001-09-17   Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, unfiltered, milligrams per liter as nitrate
71890 33 2001-09-17   Mercury, water, filtered, micrograms per liter
71895 4 2001-09-17   Mercury, suspended sediment, recoverable, micrograms per liter
71900 21 2001-09-17   Mercury, water, unfiltered, recoverable, micrograms per liter
71999 150 2001-09-17   Sample purpose, code
72104 2 2001-09-17   Sample location, distance downstream, feet
75986 10 2001-09-17   Alpha radioactivity 2-sigma combined uncertainty, water, filtered, natural uranium curve, micrograms per liter
75987 10 2001-09-17   Alpha radioactivity 2-sigma combined uncertainty, water, filtered, Th-230 curve, picocuries per liter
75988 10 2001-09-17   Beta radioactivity 2-sigma combined uncertainty, water, filtered, Sr-90/Y-90 curve, picocuries per liter
75989 10 2001-09-17   Beta radioactivity 2-sigma combined uncertainty, water, filtered, Cs-137 curve, picocuries per liter
75990 12 2001-09-17   Uranium (natural) 2-sigma combined uncertainty, water, filtered, micrograms per liter
76001 12 2001-09-17   Radium-226 2-sigma combined uncertainty, water, filtered, picocuries per liter
76004 10 2001-09-17   Alpha radioactivity 2-sigma combined uncertainty, suspended sediment, Th-230 curve, picocuries per liter
76005 10 2001-09-17   Beta radioactivity 2-sigma combined uncertainty, suspended sediment, Cs-137 curve, picocuries per liter
80020 18 2001-09-17   Uranium, water, filtered, extraction fluorometric method, micrograms per liter
80030 29 2001-09-17   Gross alpha radioactivity, water, filtered, natural uranium curve, micrograms per liter
80040 29 2001-09-17   Gross alpha radioactivity, suspended sediment, natural uranium curve, micrograms per liter
80050 29 2001-09-17   Gross beta radioactivity, water, filtered, Sr-90/Y-90 curve, picocuries per liter
80060 29 2001-09-17   Gross beta radioactivity, suspended sediment, Sr-90/Y-90 curve, picocuries per liter
80154 156 2001-09-17   Suspended sediment concentration, milligrams per liter
80155 156 2001-09-17   Suspended sediment discharge, short tons per day
81886 2 2001-09-17   p,p'-Ethyl-DDD, bed sediment, recoverable, dry weight, micrograms per kilogram
82068 13 2001-09-17   Potassium-40, water, filtered, picocuries per liter
82082 49 2001-09-17   delta hydrogen-2/hydrogen-1, water, unfiltered, per mil
82085 48 2001-09-17   delta oxygen-18/oxygen-16, water, unfiltered, per mil
82183 2 2001-09-17   Dichlorprop, water, unfiltered, recoverable, micrograms per liter
82398 144 2001-09-17   Sampling method, code
84164 144 2001-09-17   Sampler type, code
90095 203 2001-09-17   Specific conductance, water, unfiltered, laboratory, microsiemens per centimeter at 25 degrees Celsius
90410 80 2001-09-17   Acid neutralizing capacity, water, unfiltered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter as calcium carbonate
95902 27 2001-09-17   Noncarbonate hardness, water, milligrams per liter as calcium carbonate
99105 3 2001-09-17   Type of replicate, code
99111 88 2001-09-17   Type of quality assurance data associated with sample, code
99112 6 2001-09-17   Topical quality-control data purpose, code
99140 2 2001-09-17   Type of profile sample group
99156 59 2001-09-17   Sulfuric acid NWIS lot number, 4.5 N (1:7), 1 mL, National Field Supply Service (NFSS) stock number Q438FLD
99159 59 2001-09-17   Nitric acid NWIS lot number, 7.5-7.7 N, 2 mL, National Field Supply Service (NFSS) stock number Q436FLD
99206 39 2001-09-17   NWIS lot number, capsule filter, 0.45 micron
99890 3 2001-09-17   Sulfate, water, filtered, uncorrected, milligrams per liter
99891 1 2001-09-17   Phosphorus, water, unfiltered, modified jirka method, milligrams per liter as phosphorus
99892 1 2001-09-17   Ammonia plus organic nitrogen, water, unfiltered, modified jirka method, milligrams per liter as nitrogen
99893 1 2001-09-17   Phosphorus, water, filtered, modified jirka method, milligrams per liter as phosphorus
99894 1 2001-09-17   Ammonia plus organic nitrogen, water, filtered, modified jirka method, milligrams per liter as nitrogen