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Water Quality Samples for Wyoming

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Questions or concerns about USGS data and data products in Wyoming and Montana can be directed to the Wyoming-Montana Water Science Center Data Management Section.


! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 06645000 NORTH PLATTE RIVER BELOW CASPER, WY

Natrona County, Wyoming
Hydrologic Unit Code 10180007
Latitude  42°51'32", Longitude 106°12'41" NAD83
Drainage area 12,574  square miles
Contributing drainage area 12,300  square miles
Gage datum 5,070 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 Group Summary of Available Data
Parameter Group First
Date		 Last
Date		 Number of
Samples		 Number of
Values
All -- include all parameter groups 1949-06-01 2020-09-16 632 22211
Information 1957-08-09 2020-09-16 335 901
Physical 1949-06-01 2020-09-16 576 6681
Inorganics, Major, Metals 1949-06-01 2020-09-16 367 2118
Inorganics, Major, Non-metals 1949-06-01 2020-09-16 561 3870
Nutrient 1949-06-01 2020-09-16 514 3744
Microbiological 1969-08-30 2020-08-18 355 520
Biological 1976-01-20 1976-01-20 1 2
Inorganics, Minor, Metals 1949-06-01 2020-09-16 260 2405
Inorganics, Minor, Non-metals 1949-06-01 2020-09-16 310 719
Organics, pesticide 1969-12-02 2016-05-19 16 743
Organics, other 1969-08-30 2016-05-19 194 290
Radiochemical 1986-08-14 2020-09-16 108 112
Sediment 1971-05-05 2018-09-12 30 80
Population/Community 1976-01-20 1976-01-20 1 26