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Water Quality Samples for California

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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 11092450 LOS ANGELES R A SEPULVEDA DAM CA

Los Angeles County, California
Hydrologic Unit Code 18070105
Latitude  34°09'42", Longitude 118°27'57" NAD27
Drainage area 158  square miles
Gage datum 655.13 feet above NAVD88
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
00003 2 2021-03-02 2023-11-18 Sampling depth, feet
00004 24 2021-03-02 2023-11-18 Stream width, feet
00009 2 2021-03-02 2023-11-18 Location in cross section, distance from left bank looking downstream, feet
00010 2 2021-03-02 2023-11-18 Temperature, water, degrees Celsius
00020 1 2021-03-02 2023-11-18 Temperature, air, degrees Celsius
00025 1 2021-03-02 2023-11-18 Barometric pressure, millimeters of mercury
00032 1 2021-03-02 2023-11-18 Cloud cover, percent
00041 1 2021-03-02 2023-11-18 Weather, World Meteorological Organization (WMO) code
00061 13 2021-03-02 2023-11-18 Discharge, instantaneous, cubic feet per second
00063 27 2021-03-02 2023-11-18 Number of sampling points, count
00064 14 2021-03-02 2023-11-18 Mean depth of stream, feet
00065 13 2021-03-02 2023-11-18 Gage height, feet
00095 1 2021-03-02 2023-11-18 Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
00191 1 2021-03-02 2023-11-18 Hydrogen ion, water, unfiltered, calculated, milligrams per liter
00300 1 2021-03-02 2023-11-18 Dissolved oxygen, water, unfiltered, milligrams per liter
00301 1 2021-03-02 2023-11-18 Dissolved oxygen, water, unfiltered, percent of saturation
00400 1 2021-03-02 2023-11-18 pH, water, unfiltered, field, standard units
00403 1 2021-03-02 2023-11-18 pH, water, unfiltered, laboratory, standard units
00405 1 2021-03-02 2023-11-18 Carbon dioxide, water, unfiltered, milligrams per liter
00452 1 2021-03-02 2023-11-18 Carbonate, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter
00453 1 2021-03-02 2023-11-18 Bicarbonate, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter
00602 1 2021-03-02 2023-11-18 Total nitrogen [nitrate + nitrite + ammonia + organic-N], water, filtered, milligrams per liter
00607 1 2021-03-02 2023-11-18 Organic nitrogen, water, filtered, milligrams per liter as nitrogen
00608 1 2021-03-02 2023-11-18 Ammonia (NH3 + NH4+), water, filtered, milligrams per liter as nitrogen
00613 1 2021-03-02 2023-11-18 Nitrite, water, filtered, milligrams per liter as nitrogen
00618 1 2021-03-02 2023-11-18 Nitrate, water, filtered, milligrams per liter as nitrogen
00623 1 2021-03-02 2023-11-18 Ammonia plus organic nitrogen, water, filtered, milligrams per liter as nitrogen
00631 1 2021-03-02 2023-11-18 Nitrate plus nitrite, water, filtered, milligrams per liter as nitrogen
00660 1 2021-03-02 2023-11-18 Orthophosphate, water, filtered, milligrams per liter as PO4
00666 1 2021-03-02 2023-11-18 Phosphorus, water, filtered, milligrams per liter as phosphorus
00671 1 2021-03-02 2023-11-18 Orthophosphate, water, filtered, milligrams per liter as phosphorus
00680 1 2021-03-02 2023-11-18 Organic carbon, water, unfiltered, milligrams per liter
00681 1 2021-03-02 2023-11-18 Organic carbon, water, filtered, milligrams per liter
00900 1 2021-03-02 2023-11-18 Hardness, water, milligrams per liter as calcium carbonate
00904 1 2021-03-02 2023-11-18 Noncarbonate hardness, water, filtered, field, milligrams per liter as calcium carbonate
00905 1 2021-03-02 2023-11-18 Noncarbonate hardness, water, filtered, lab, milligrams per liter as calcium carbonate
00915 1 2021-03-02 2023-11-18 Calcium, water, filtered, milligrams per liter
00925 1 2021-03-02 2023-11-18 Magnesium, water, filtered, milligrams per liter
00930 1 2021-03-02 2023-11-18 Sodium, water, filtered, milligrams per liter
00931 1 2021-03-02 2023-11-18 Sodium adsorption ratio (SAR), water, number
00932 1 2021-03-02 2023-11-18 Sodium fraction of cations, water, percent in equivalents of major cations
00935 1 2021-03-02 2023-11-18 Potassium, water, filtered, milligrams per liter
00940 1 2021-03-02 2023-11-18 Chloride, water, filtered, milligrams per liter
00945 1 2021-03-02 2023-11-18 Sulfate, water, filtered, milligrams per liter
00950 1 2021-03-02 2023-11-18 Fluoride, water, filtered, milligrams per liter
00955 1 2021-03-02 2023-11-18 Silica, water, filtered, milligrams per liter as SiO2
01000 1 2021-03-02 2023-11-18 Arsenic, water, filtered, micrograms per liter
01005 1 2021-03-02 2023-11-18 Barium, water, filtered, micrograms per liter
01020 1 2021-03-02 2023-11-18 Boron, water, filtered, micrograms per liter
01025 1 2021-03-02 2023-11-18 Cadmium, water, filtered, micrograms per liter
01030 1 2021-03-02 2023-11-18 Chromium, water, filtered, micrograms per liter
01046 1 2021-03-02 2023-11-18 Iron, water, filtered, micrograms per liter
01049 1 2021-03-02 2023-11-18 Lead, water, filtered, micrograms per liter
01056 1 2021-03-02 2023-11-18 Manganese, water, filtered, micrograms per liter
01080 1 2021-03-02 2023-11-18 Strontium, water, filtered, micrograms per liter
01085 1 2021-03-02 2023-11-18 Vanadium, water, filtered, micrograms per liter
01095 1 2021-03-02 2023-11-18 Antimony, water, filtered, micrograms per liter
01106 1 2021-03-02 2023-11-18 Aluminum, water, filtered, micrograms per liter
01130 1 2021-03-02 2023-11-18 Lithium, water, filtered, micrograms per liter
01300 1 2021-03-02 2023-11-18 Oil and grease, severity, code
01305 1 2021-03-02 2023-11-18 Suds or foam, severity, code
01320 1 2021-03-02 2023-11-18 Floating garbage, severity, code
01325 1 2021-03-02 2023-11-18 Floating algae mats, severity, code
01330 1 2021-03-02 2023-11-18 Odor, atmospheric, severity, code
01340 1 2021-03-02 2023-11-18 Dead fish, severity, code
01345 1 2021-03-02 2023-11-18 Floating debris, severity, code
01350 1 2021-03-02 2023-11-18 Turbidity, severity, code
22703 1 2021-03-02 2023-11-18 Uranium (natural), water, filtered, micrograms per liter
29801 1 2021-03-02 2023-11-18 Alkalinity, water, filtered, fixed endpoint (pH 4.5) titration, laboratory, milligrams per liter as calcium carbonate
30207 13 2021-03-02 2023-11-18 Gage height, above datum, meters
30209 13 2021-03-02 2023-11-18 Discharge, instantaneous, cubic meters per second
39086 1 2021-03-02 2023-11-18 Alkalinity, water, filtered, inflection-point titration method (incremental titration method), field, milligrams per liter as calcium carbonate
63676 1 2021-03-02 2023-11-18 Turbidity, water, unfiltered, broad band light source (400-680 nm), detectors at multiple angles including 90 +-30 degrees, ratiometric correction, NTRU
70300 1 2021-03-02 2023-11-18 Dissolved solids dried at 180 degrees Celsius, water, filtered, milligrams per liter
70301 1 2021-03-02 2023-11-18 Dissolved solids, water, filtered, sum of constituents, milligrams per liter
70303 1 2021-03-02 2023-11-18 Dissolved solids, water, filtered, short tons per acre-foot
70331 17 2021-03-02 2023-11-18 Suspended sediment, sieve diameter, percent smaller than 0.0625 millimeters
71846 1 2021-03-02 2023-11-18 Ammonia (NH3 + NH4+), water, filtered, milligrams per liter as NH4
71851 1 2021-03-02 2023-11-18 Nitrate, water, filtered, milligrams per liter as nitrate
71856 1 2021-03-02 2023-11-18 Nitrite, water, filtered, milligrams per liter as nitrite
71865 1 2021-03-02 2023-11-18 Iodide, water, filtered, milligrams per liter
71870 1 2021-03-02 2023-11-18 Bromide, water, filtered, milligrams per liter
71999 27 2021-03-02 2023-11-18 Sample purpose, code
72219 9 2021-03-02 2023-11-18 Sampler nozzle material, code
72220 8 2021-03-02 2023-11-18 Sampler nozzle diameter, code
80154 17 2021-03-02 2023-11-18 Suspended sediment concentration, milligrams per liter
80155 10 2021-03-02 2023-11-18 Suspended sediment discharge, short tons per day
82073 2 2021-03-02 2023-11-18 Starting time, 24 hour clock, hour-minute (hhmm)
82074 2 2021-03-02 2023-11-18 Ending time, 24 hour clock, hour-minute (hhmm)
82398 27 2021-03-02 2023-11-18 Sampling method, code
84164 24 2021-03-02 2023-11-18 Sampler type, code
84182 1 2021-03-02 2023-11-18 Bottle or bag sampler material (construction), code
90095 1 2021-03-02 2023-11-18 Specific conductance, water, unfiltered, laboratory, microsiemens per centimeter at 25 degrees Celsius
91157 14 2021-03-02 2023-11-18 Suspended sediment, sediment mass recovered from whole water sample, dry weight, grams
91158 5 2021-03-02 2023-11-18 Suspended sediment, smaller than 0.063 mm sieve diameter, sediment mass recovered from whole water sample, dry weight, grams
91159 5 2021-03-02 2023-11-18 Suspended sediment, larger than 0.063 mm sieve diameter, sediment mass recovered from whole water sample, dry weight, grams
99206 1 2021-03-02 2023-11-18 NWIS lot number, capsule filter, 0.45 micron