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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 12340000 Blackfoot River near Bonner MT

Missoula County, Montana
Hydrologic Unit Code 17010203
Latitude  46°53'57.88", Longitude 113°45'22.75" NAD83
Drainage area 2,287  square miles
Gage datum 3,344.76 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
Number of
Number of
All -- include all parameter groups 1974-09-27 2023-11-03 2592 29958
Information 1980-06-17 2023-11-03 2525 10193
Physical 1974-09-27 2023-11-03 2592 11153
Inorganics, Major, Metals 1986-04-16 2023-11-03 276 660
Inorganics, Major, Non-metals 1985-03-28 2023-11-03 286 603
Nutrient 1999-05-26 2009-06-23 91 469
Inorganics, Minor, Metals 1985-03-28 2023-11-03 284 3401
Inorganics, Minor, Non-metals 1985-03-28 2023-11-03 284 566
Sediment 1985-03-28 2023-11-03 2227 2913