Clean Water Act discharge permit · NPDES COG591120

SEIBERT WWTF, Seibert, CO: NPDES COG591120 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
93Pollutants under a numeric limit
6Pollutants with an effluent exceedance

SEIBERT WWTF, held by Seibert Town of, holds NPDES permit COG591120, which discharges to Unnamed Tributary To Sand Creek. EPA’s file records it issued October 31, 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	SEIBERT WWTF
Permittee as filed	Seibert Town of
NPDES ID	COG591120
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	October 31, 2024
Expiration date	December 31, 2029
Address	Seibert, CO 80845
Receiving water	Unnamed tributary to Sand Creek
Subwatershed	Lower Sand Creek (HUC 102500030204)

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

Effluent limits and exceedances

93Pollutants on file
93Under a numeric limit
92With 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 93 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
E. coli	4	10	8	July 31, 2026	368% over the limit
Nitrogen, ammonia total [as N]	48	4	2	May 31, 2025	76% over the limit
Sulfide-hydrogen sulfide [undissociated]	1	4	2	February 28, 2025	104,900% over the limit
Nitrogen, inorganic total	1	3	2	February 28, 2025	155% over the limit
BOD, 5-day, 20 deg. C	6	3	1	January 31, 2025	27% over the limit
BOD, 5-day, percent removal	1	2	1	January 31, 2025	119% over the limit
Sulfate	1	3	0
Flow, in conduit or thru treatment plant	4	2	0
Chlorine, total residual	4	2	0
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia	3	2	0
TU Static Renewal 7-Day Chronic Pimphales promelas	3	2	0
pH	2	2	0
Solids, total suspended	2	2	0
Manganese, dissolved [as Mn]	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
Selenium, 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

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 COG591120.

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.

This public-records page covers Clean Water Act discharge permit NPDES COG591120 for the SEIBERT WWTF in Seibert, CO, held by Seibert Town of and discharging to an unnamed tributary to Sand Creek, within the Lower Sand Creek subwatershed (HUC 102500030204). The permit's file lists 93 pollutants on file, of which 93 are under a numeric limit, 92 have a violation of any kind, and 6 have an effluent exceedance.