Clean Water Act discharge permit · NPDES COG591185

YAMPA WWTF, Routt County, CO: NPDES COG591185 discharge permit, effluent exceedances, inspections, penalties

Name: YAMPA WWTF, NPDES COG591185: Clean Water Act discharge permit record
Creator: Velarion Records
License: https://www.usa.gov/government-works

EffectivePermit status
MinorDischarger class
64Pollutants under a numeric limit
6Pollutants with an effluent exceedance

YAMPA WWTF, held by Yampa Town of, holds NPDES permit COG591185, which discharges to Yampa River. EPA’s file records it issued November 2, 2022 and expiring December 31, 2031. 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.

Identity

Facility as filed	YAMPA WWTF
Permittee as filed	Yampa Town of
NPDES ID	COG591185
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	November 2, 2022
Expiration date	December 31, 2031
Address	Routt County, CO 80483
Receiving water	Yampa River
Subwatershed	Lawson Creek-Yampa River (HUC 140500010107)

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

Effluent limits and exceedances

64Pollutants on file
64Under a numeric limit
7With a violation of any kind
6With 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; the 60 with the most exceedances of 64 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	4	7	7	July 31, 2026	110% over the limit
Solids, suspended percent removal	1	5	5	July 31, 2026	271% over the limit
Chlorine, total residual	2	4	4	October 31, 2025	67% over the limit
BOD, 5-day, 20 deg. C	6	3	3	May 31, 2026	50% over the limit
BOD, 5-day, percent removal	1	2	2	April 30, 2026	95% over the limit
Nitrogen, ammonia total [as N]	25	1	1	February 28, 2026	23% over the limit
Carbon, tot organic [TOC]	2	2	0
Flow, in conduit or thru treatment plant	4	0	0
Solids, total dissolved	4	0	0
Aluminum, total recoverable	3	0	0
Plant capacity fact. percent of capacity	2	0	0
pH	2	0	0
Nitrogen, nitrite total [as N]	2	0	0
Nitrogen, inorganic total	2	0	0
Chloride [as Cl]	2	0	0
Arsenic, total recoverable	2	0	0
E. coli	2	0	0
Sulfide-hydrogen sulfide [undissociated]	2	0	0
Perfluorooctanoic acid (PFOA)	2	0	0
Perfluorobutanoic acid (PFBA)	2	0	0
Perfluorooctanesulfonamide (PFOSA)	2	0	0
Perfluoropentanoic acid (PFPeA)	2	0	0
Perfluorohexanoic acid (PFHxA)	2	0	0
Perfluoroheptanoic acid (PFHpA)	2	0	0
Perfluorononanoic acid (PFNA)	2	0	0
Perfluorodecanoic acid (PFDA)	2	0	0
Perfluoroundecanoic acid (PFUnA)	2	0	0
Perfluorododecanoic acid (PFDoA)	2	0	0
Perfluorotridecanoic acid (PFTrDA)	2	0	0
Perfluorotetradecanoic acid (PFTeDA)	2	0	0
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)	2	0	0
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)	2	0	0
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)	2	0	0
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)	2	0	0
Perfluorobutanesulfonic acid (PFBS)	2	0	0
Perfluorodecanesulfonic acid (PFDS)	2	0	0
Perfluoroheptanesulfonic acid (PFHpS)	2	0	0
Perfluorohexanesulfonic acid (PFHxS)	2	0	0
Perfluorooctanesulfonic acid (PFOS)	2	0	0
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)	2	0	0
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)	2	0	0
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)	2	0	0
Perfluoropentanesulfonic acid (PFPeS)	2	0	0
Perfluorononanesulfonic acid (PFNS)	2	0	0
Hexafluoropropylene oxide dimer acid (HFPO-DA)	2	0	0
Perfluoro-2-methoxypropanoic acid	2	0	0
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)	2	0	0
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)	2	0	0
Perfluorododecanesulfonic acid (PFDoS)	2	0	0
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)	2	0	0
Potassium 9-chlorohexadecafluoro-3-oxanonane-1-sulfonate	2	0	0
Potassium 11-chloroeicosafluoro-3-oxaundecane-1-sulfonate	2	0	0
N-methyl perfluorooctanesulfonamide (NMeFOSA)	2	0	0
N-ethyl perfluorooctanesulfonamide (NEtFOSA)	2	0	0
Methanol, total	2	0	0
PFAS Sum	2	0	0
3-Perfluoropropyl propanoic acid (3:3 FTCA)	2	0	0
3-Perfluoroheptyl propanoic acid (7:3 FTCA)	2	0	0
Perfluoro-4-methoxybutanoic acid (PFMBA)	2	0	0
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)	2	0	0

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 COG591185.

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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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 COG591185 there.

Nearby on the register

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

This page is a Velarion Records public-records entry for Clean Water Act discharge permit COG591185, held by Yampa Town of for the YAMPA WWTF in Routt County, CO, which discharges to the Yampa River in the Lawson Creek-Yampa River subwatershed (HUC 140500010107). The page lists 64 pollutants on file, 64 of them under a numeric limit, with 6 pollutants showing an effluent exceedance and 7 showing a violation of any kind.