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Water Quality Samples for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming 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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 12340500 Clark Fork above Missoula MT

Missoula County, Montana
Hydrologic Unit Code 17010204
Latitude  46°52'36.35", Longitude 113°55'55.63" NAD83
Drainage area 6,021  square miles
Gage datum 3,198.30 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 1969-07-10 2023-11-03 2740 35426
Information 1982-07-13 2023-11-03 2653 11137
Physical 1969-07-10 2023-11-03 2739 12652
Inorganics, Major, Metals 1969-07-10 2023-11-03 426 957
Inorganics, Major, Non-metals 1969-07-10 2023-11-03 432 788
Nutrient 1969-07-10 2009-06-23 82 323
Microbiological 1969-07-10 1971-06-03 24 41
Inorganics, Minor, Metals 1969-07-10 2023-11-03 433 5227
Inorganics, Minor, Non-metals 1969-07-10 2023-11-03 433 876
Organics, other 1969-08-14 1971-06-02 23 23
Sediment 1986-07-17 2023-11-03 2505 3402