Clean Water Act discharge permit · NPDES CO0048873

SOMERSET WWTF, Somerset, CO: NPDES CO0048873 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
7Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

SOMERSET WWTF, held by Gunnison County, holds NPDES permit CO0048873, which discharges to North Fork Gunnison River. EPA’s file records it issued July 31, 2013 and expiring August 31, 2018.

SOMERSET WWTF, Somerset, Colorado: Individual permit CO0048873, held by Gunnison County; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued July 31, 2013, term to August 31, 2018; discharges to North Fork Gunnison River.

BOD, 5-day, 20 deg. C: 1 limit, 25 violations of any kind, 2 effluent exceedances, latest July 31, 2020, largest 44% over the limit.
Solids, total dissolved: 3 limits, 3 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 4 limits, 2 violations of any kind, 0 effluent exceedances.
pH: 2 limits, 2 violations of any kind, 0 effluent exceedances.
Oil and grease: 1 limit, 1 violation of any kind, 0 effluent exceedances.
Chlorine, total residual: 1 limit, 1 violation of any kind, 0 effluent exceedances.
Oil and grease visual: 1 limit, 1 violation of any kind, 0 effluent exceedances.

Colorado holds 206 Publicly owned treatment works coverages of this permit type in EPA’s file; 177 were issued before CO0048873. Gunnison County holds 10 permits in Colorado.

Other permits held by Gunnison County

TAYLOR PARK (MURDIE FLATS) PIT, Taylor Park: COG501907, issued April 30, 2017
KEBLER PASS PIT, Crested Butte: COG501908, issued May 22, 2017
TARAMARCAZ PIT, Doyleville: COG501909, issued April 30, 2017
WATSON FLATS, Gunnison County: COG502034, issued May 22, 2017
DOS RIOS WTP, Gunnison: COG641170, issued August 27, 2014
GUNNISON/CRESTED BUTTE REGIONAL AIRPORT, Gunnison: COR900199, issued May 18, 2012
GUNNISON COUNTY LANDFILL, Gunnison County: COR900424, issued May 21, 2012
GUNNISON COUNTY RECYCLING CENTER, Gunnison: COR900447, issued May 31, 2012
GUNNISON COUNTY RECYCLING CENTER, Gunnison: COR901659, issued July 1, 2024

Coverages issued nearest CO0048873

April 30, 2013: TELLURIDE REGIONAL WWTF, San Miguel County, CO0041840, held by Telluride Town of
May 30, 2013: MT CRESTED BUTTE WATER AND SANITATION DIST, Mount Crested Butte, CO0027171, held by Mt Crested Butte WSD
May 30, 2013: WEST MONTROSE SANITATION DIST WWTF, Montrose, CO0030449, held by West Montrose Sanitation District
May 30, 2013: MONTROSE WWTP, Montrose County, CO0039624, held by Montrose City of
May 31, 2013: HAROLD D THOMPSON REGIONAL WW RECLAMATION FACILITY, Fountain, CO0000005, held by Lower Fountain Metro Sewage Disposal Dist
August 27, 2013: LOMA LINDA SAN DIST WWTF, La Plata County, CO0000011, held by Loma Linda Sanitation District
August 30, 2013: RANGELY WWTF, Rangely, CO0000010, held by Rangely Town of
August 30, 2013: PALISADE WWTF, Mesa County, CO0000012, held by Palisade Town of
October 30, 2013: ANTONITO TOWN OF, Antonito, CO0040975, held by Antonito Town of
January 28, 2014: LA JARA, TOWN OF, La Jara, CO0020150, held by La Jara Town of

SOMERSET WWTF among its neighbors

EPA’s permit file holds 2 discharge permits in the Bear Creek-North Fork Gunnison River subwatershed (HUC 140200040403), CO0048873 among them. Its county holds 69, 3 of them major permits; CO0048873 is a minor permit.

Other permits in the Bear Creek-North Fork Gunnison River subwatershed (HUC 140200040403)

WEST ELK MINE, Somerset: COR428910, minor permit, permit term to March 31, 2029

Identity

Facility as filed	SOMERSET WWTF
Permittee as filed	Gunnison County
NPDES ID	CO0048873
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	July 31, 2013
Expiration date	August 31, 2018
Address	Somerset, CO 81434
Receiving water	North Fork Gunnison River
Subwatershed	Bear Creek-North Fork Gunnison River (HUC 140200040403)

Effluent limits and exceedances

7Pollutants on file
7Under a numeric limit
7With a violation of any kind
1With 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
BOD, 5-day, 20 deg. C	1	25	2	July 31, 2020	44% over the limit
Solids, total dissolved	3	3	0
Flow, in conduit or thru treatment plant	4	2	0
pH	2	2	0
Oil and grease	1	1	0
Chlorine, total residual	1	1	0
Oil and grease visual	1	1	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES CO0048873.

Inspections

EPA’s inspection file holds no inspection for NPDES CO0048873.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES CO0048873.

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

The page covers NPDES permit CO0048873 for the SOMERSET WWTF in Somerset, CO, held by Gunnison County, which discharges to the North Fork Gunnison River within the Bear Creek-North Fork Gunnison River subwatershed (HUC 140200040403). The permit is listed as administratively continued, with an issue date of July 31, 2013 and an expiration date of August 31, 2018, and the file shows 7 pollutants on file, 7 under a numeric limit, 1 pollutant with an effluent exceedance, and 1 with a violation of any kind.