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Clean Water Act discharge permit · NPDES MTG770026

PPL MONTANA - RYAN DAM WATER SYSTEM, Great Falls, MT: NPDES MTG770026 discharge permit, effluent exceedances, inspections, penalties

PPL MONTANA - RYAN DAM WATER SYSTEM, held by PPL MONTANA LLC, holds NPDES permit MTG770026, which discharges to Missouri River. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for PPL MONTANA - RYAN DAM WATER SYSTEM: its NPDES ID, its permit type and status, its its address in Great Falls, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTG770026.

Identity

Facility as filedPPL MONTANA - RYAN DAM WATER SYSTEM
Permittee as filedPPL MONTANA LLC
NPDES IDMTG770026
Permit statusNot needed
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
Issuing agencyMONTANA DEQ
AddressGreat Falls, MT 59404
Receiving waterMISSOURI RIVER
Receiving water impaired303(D) Listed
SubwatershedMissouri River-Rainbow Dam (HUC 100301021204)
SIC4941 – Water Supply

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTG770026.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTG770026.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MTG770026 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers Clean Water Act NPDES permit MTG770026 for PPL MONTANA - RYAN DAM WATER SYSTEM in Great Falls, MT, held by PPL MONTANA LLC and discharging to the MISSOURI RIVER. The facts list a permit status of Not needed, a discharger class of Minor, zero pollutants under a numeric limit, and zero pollutants with an effluent exceedance. The page also notes that the receiving water is 303(D) Listed and that the subwatershed is Missouri River-Rainbow Dam (HUC 100301021204).