Clean Water Act discharge permit · NPDES MT0031631

CITY OF BOZEMAN - LYMAN CREEK RESERVOIR, Bozeman, MT: NPDES MT0031631 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
4Pollutants under a numeric limit
0Pollutants with an effluent exceedance

CITY OF BOZEMAN - LYMAN CREEK RESERVOIR, held by CITY OF BOZEMAN, holds NPDES permit MT0031631, which discharges to Lyman Creek Bridger Creek. EPA’s file records it issued August 29, 2017 and expiring September 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for CITY OF BOZEMAN - LYMAN CREEK RESERVOIR: its NPDES ID, its permit type and status, its dates, its address in Bozeman, Montana, its receiving water, and 4 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MT0031631.

Identity

Facility as filed	CITY OF BOZEMAN - LYMAN CREEK RESERVOIR
Permittee as filed	CITY OF BOZEMAN
NPDES ID	MT0031631
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	August 29, 2017
Expiration date	September 30, 2022
Address	Bozeman, MT 59715
Receiving water	LYMAN CREEK BRIDGER CREEK
Subwatershed	Lower Bridger Creek (HUC 100200080802)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

4Pollutants on file
4Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Flow rate	2	0	0
pH	2	0	0
Chlorine, total residual	2	0	0
Fluoride, total [as F]	1	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MT0031631.

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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0031631.

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, MT0031631.

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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 MT0031631 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers the Clean Water Act discharge permit NPDES MT0031631 held by CITY OF BOZEMAN for CITY OF BOZEMAN - LYMAN CREEK RESERVOIR in Bozeman, Montana, which discharges to Lyman Creek and Bridger Creek. The register lists the permit as administratively continued, with a discharger class of 4 and 4 pollutants under a numeric limit, and 0 pollutants with an effluent exceedance.