Clean Water Act discharge permit · NPDES COG591115

DURANGO WEST METRO DIST NO 2 WWTF, Hesperus, CO: NPDES COG591115 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
96Pollutants under a numeric limit
2Pollutants with an effluent exceedance

DURANGO WEST METRO DIST NO 2 WWTF, held by Durango West Metropolitan District No 2, holds NPDES permit COG591115, which discharges to Unnmd Trib/Coal Gulch/Lightner Crk/Animas River. EPA’s file records it issued September 10, 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	DURANGO WEST METRO DIST NO 2 WWTF
Permittee as filed	Durango West Metropolitan District No 2
NPDES ID	COG591115
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	September 10, 2024
Expiration date	December 31, 2029
Address	Hesperus, CO 81326
Receiving water	Unnmd trib/Coal Gulch/Lightner Crk/Animas River
Subwatershed	Outlet Lightner Creek (HUC 140801040603)

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

Effluent limits and exceedances

96Pollutants on file
96Under a numeric limit
79With a violation of any kind
2With 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 96 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Chloride [as Cl]	2	3	3	February 28, 2025	313% over the limit
Sulfide-hydrogen sulfide [undissociated]	2	3	3	January 31, 2025	16,567% over the limit
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia	3	2	0
TU Static Renewal 7-Day Chronic Pimphales promelas	3	2	0
Aluminum, total recoverable	2	2	0
Lead, total recoverable	2	2	0
Chromium, hexavalent dissolved [as Cr]	2	2	0
Zinc, potentially dissolved	2	2	0
Silver, potentially dissolved	2	2	0
Copper, potentially dissolved	2	2	0
Cadmium, potentially dissolvd	2	2	0
Lead, potentially dissolvd	2	2	0
Nickel, potentially dissolvd	2	2	0
Uranium, potentially dissolvd	2	2	0
Perfluorooctanoic acid (PFOA)	2	2	0
Perfluorobutanoic acid (PFBA)	2	2	0
Perfluorooctanesulfonamide (PFOSA)	2	2	0
Perfluoropentanoic acid (PFPeA)	2	2	0
Perfluorohexanoic acid (PFHxA)	2	2	0
Perfluoroheptanoic acid (PFHpA)	2	2	0
Perfluorononanoic acid (PFNA)	2	2	0
Perfluorodecanoic acid (PFDA)	2	2	0
Perfluoroundecanoic acid (PFUnA)	2	2	0
Perfluorododecanoic acid (PFDoA)	2	2	0
Perfluorotridecanoic acid (PFTrDA)	2	2	0
Perfluorotetradecanoic acid (PFTeDA)	2	2	0
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)	2	2	0
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)	2	2	0
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)	2	2	0
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)	2	2	0
Perfluorobutanesulfonic acid (PFBS)	2	2	0
Perfluorodecanesulfonic acid (PFDS)	2	2	0
Perfluoroheptanesulfonic acid (PFHpS)	2	2	0
Perfluorohexanesulfonic acid (PFHxS)	2	2	0
Perfluorooctanesulfonic acid (PFOS)	2	2	0
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)	2	2	0
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)	2	2	0
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)	2	2	0
Perfluoropentanesulfonic acid (PFPeS)	2	2	0
Perfluorononanesulfonic acid (PFNS)	2	2	0
Hexafluoropropylene oxide dimer acid (HFPO-DA)	2	2	0
Perfluoro-2-methoxypropanoic acid	2	2	0
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)	2	2	0
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)	2	2	0
Perfluorododecanesulfonic acid (PFDoS)	2	2	0
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)	2	2	0
Potassium 9-chlorohexadecafluoro-3-oxanonane-1-sulfonate	2	2	0
Potassium 11-chloroeicosafluoro-3-oxaundecane-1-sulfonate	2	2	0
N-methyl perfluorooctanesulfonamide (NMeFOSA)	2	2	0
N-ethyl perfluorooctanesulfonamide (NEtFOSA)	2	2	0
PFAS Sum	2	2	0
3-Perfluoropropyl propanoic acid (3:3 FTCA)	2	2	0
3-Perfluoroheptyl propanoic acid (7:3 FTCA)	2	2	0
Perfluoro-4-methoxybutanoic acid (PFMBA)	2	2	0
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)	2	2	0
Cyanide, total [as CN]	1	1	0
Arsenic, total recoverable	1	1	0
Iron, total recoverable	1	1	0
Arsenic, total [as As]	1	1	0
Cadmium, total [as Cd]	1	1	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 COG591115.

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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Nearby on the register

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