Clean Water Act discharge permit · NPDES COG591002

DEER TRAIL WWTF, Deer Trail, CO: NPDES COG591002 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
94Pollutants under a numeric limit
7Pollutants with an effluent exceedance

DEER TRAIL WWTF, held by Deer Trail Town of, holds NPDES permit COG591002, which discharges to Unnamed Tributary To Eaast Bijou Creek. EPA’s file records it issued January 25, 2024 and expiring December 31, 2029. 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	DEER TRAIL WWTF
Permittee as filed	Deer Trail Town of
NPDES ID	COG591002
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 25, 2024
Expiration date	December 31, 2029
Address	Deer Trail, CO 80105
Receiving water	unnamed tributary to Eaast Bijou Creek
Subwatershed	First Creek-East Bijou Creek (HUC 101900110109)

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

Effluent limits and exceedances

94Pollutants on file
94Under a numeric limit
7With a violation of any kind
7With 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 94 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Nitrogen, ammonia total [as N]	48	4	4	May 31, 2024	21% over the limit
BOD, 5-day, 20 deg. C	6	4	4	April 30, 2026	52% over the limit
E. coli	4	3	3	September 30, 2024	284% over the limit
Chlorine, total residual	4	2	2	August 31, 2025	460% over the limit
Nitrogen, inorganic total	2	1	1	April 30, 2024	1% over the limit
Sulfide-hydrogen sulfide [undissociated]	1	1	1	September 30, 2024	9,900% over the limit
Solids, suspended percent removal	1	1	1	January 31, 2025	4% over the limit
Solids, total suspended	4	0	0
Flow, in conduit or thru treatment plant	4	0	0
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia	4	0	0
TU Static Renewal 7-Day Chronic Pimphales promelas	4	0	0
Nitrogen, nitrite total [as N]	3	0	0
Plant capacity fact. percent of capacity	2	0	0
pH	2	0	0
Chromium, hexavalent dissolved [as Cr]	2	0	0
Silver, potentially dissolved	2	0	0
Copper, potentially dissolved	2	0	0
Cadmium, potentially dissolvd	2	0	0
Lead, potentially dissolvd	2	0	0
Manganese, potentially dissolvd	2	0	0
Nickel, potentially dissolvd	2	0	0
Selenium, potentially dissolvd	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
PFAS Sum	2	0	0
3-Perfluoropropyl propanoic acid (3:3 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 COG591002.

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 COG591002 there.

Nearby on the register

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