Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

NPDES Permit for Wild Horse Hot Springs in Montana

Under National Pollutant Discharge Elimination System permit number MT-0000005, Wild Horse Hot Springs is authorized to discharge from from its geothermal soaking facility located on the Flathead Reservation at latitude 47.6407° N and longitude 114.5725° W, Lake County, Montana to an unnamed tributary of the Little Bitterroot River.

MT0000005 Wild Horse Hot Springs NPDES Permit (pdf) (344.35 KB, March 19, 2024)
The NPDES discharge permit.
MT0000005 Wild Horse Hot Springs Statement of Basis (pdf) (578.17 KB, March 19, 2024)
The statement of basis for the NPDES discharge permit.