Clean Water Act discharge permit · NPDES COG589015

CROOK WWTF, Crook, CO: NPDES COG589015 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
5Pollutants with an effluent exceedance

CROOK WWTF, held by Crook, Town of, holds NPDES permit COG589015, which discharges to Unnamed Drainage Ditch. EPA’s file records it issued October 17, 2005 and expiring October 31, 2010. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	CROOK WWTF
Permittee as filed	Crook, Town of
NPDES ID	COG589015
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	October 17, 2005
Expiration date	October 31, 2010
Address	Crook, CO 80726
Receiving water	UNNAMED DRAINAGE DITCH
Subwatershed	Town of Crook (HUC 101900121201)
SIC	4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

13Pollutants on file
10Under a numeric limit
12With a violation of any kind
5With 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, percent removal	1	23	5	July 31, 2016	1,353% over the limit
Flow, in conduit or thru treatment plant	6	71	3	June 30, 2015	375% over the limit
BOD, 5-day, 20 deg. C	10	114	2	July 31, 2016	180% over the limit
Solids, total suspended	4	36	2	July 31, 2016	65% over the limit
E. coli	0	36	2	June 30, 2015	99,999% over the limit
Plant capacity fact. percent of capacity	0	41	0
pH	2	32	0
Oil and grease	1	16	0
Oil and grease visual	1	16	0
Nitrogen, ammonia total [as N]	0	5	0
E. coli, thermotol, MF, MTEC	2	2	0
Chlorine, total residual	2	2	0
Coliform, fecal general	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 COG589015.

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.

Watch this permit

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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 COG589015 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES COG589015 for the CROOK WWTF in Crook, CO, held by Crook, Town of, which is administratively continued and classed as a Minor Discharger. The file lists 13 pollutants on file, 10 under a numeric limit, 5 with an effluent exceedance and 12 with a violation.