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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting in February 2024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 12323720 Willow Creek at Opportunity, MT

Deer Lodge County, Montana
Hydrologic Unit Code 17010201
Latitude  46°06'25.79", Longitude 112°48'38.20" NAD83
Drainage area 28.6  square miles
Gage datum 4,930 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 Group Summary of Available Data
Parameter Group First
Number of
Number of
All -- include all parameter groups 2003-03-17 2023-11-01 327 10495
Information 2003-03-17 2023-11-01 265 1751
Physical 2003-03-17 2023-11-01 327 3374
Inorganics, Major, Metals 2003-03-17 2023-07-11 194 804
Inorganics, Major, Non-metals 2003-03-17 2023-11-01 235 832
Nutrient 2009-08-17 2009-08-18 21 189
Inorganics, Minor, Metals 2003-03-17 2023-07-11 232 2546
Inorganics, Minor, Non-metals 2003-03-17 2023-07-11 232 449
Organics, other 2013-04-09 2023-11-01 87 87
Sediment 2003-03-17 2023-08-15 167 463