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Clean Water Act discharge permit · NPDES MTR109230

LAKE ELMO STATE PARK, Billings, MT: NPDES MTR109230 discharge permit, effluent exceedances, inspections, penalties

LAKE ELMO STATE PARK, held by Fish Wildlife & Parks, holds NPDES permit MTR109230, which discharges to Lake Elmo. EPA’s file records it issued November 5, 2021 and expiring December 31, 2022. 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 LAKE ELMO STATE PARK: its NPDES ID, its permit type and status, its dates, its address in Billings, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR109230.

Identity

Facility as filedLAKE ELMO STATE PARK
Permittee as filedFish Wildlife & Parks
NPDES IDMTR109230
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedNovember 5, 2021
Expiration dateDecember 31, 2022
AddressBillings, MT 59105
Receiving waterLAKE ELMO
SubwatershedFivemile Creek (HUC 100700070401)
SIC1794 – Excavation Work

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 MTR109230.

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 MTR109230.

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MTR109230.

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How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

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 MTR109230 there.

Nearby on the register

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

What this page shows

The LAKE ELMO STATE PARK storm water construction permit is one of 262 such permits on EPA's NPDES register in Yellowstone County, and 5.0% of those 262 carry a violation on file. Among the 253 storm water construction permits in the county, 54.2% were issued earlier than this one, which was issued November 5, 2021. The permit sits within a subwatershed that holds 14 NPDES permits, this one included, and it has no pollutant recorded under a numeric limit or with an effluent exceedance.