Clean Water Act discharge permit · NPDES COG317261

NORTH OF BOULDER CREEK UTILITY EXPANSION - CU BOULDER, Boulder, CO: NPDES COG317261 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
115Pollutants under a numeric limit
0Pollutants with an effluent exceedance

NORTH OF BOULDER CREEK UTILITY EXPANSION - CU BOULDER, held by WE O'Neil Construction Company of CO, holds NPDES permit COG317261, which discharges to South Boulder Creek. EPA’s file records it issued May 15, 2026 and expiring May 31, 2028. 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.

What the register holds for NORTH OF BOULDER CREEK UTILITY EXPANSION - CU BOULDER: its NPDES ID, its permit type and status, its dates, its address in Boulder, Colorado, its receiving water, and 115 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COG317261.

Identity

Facility as filed	NORTH OF BOULDER CREEK UTILITY EXPANSION - CU BOULDER
Permittee as filed	WE O'Neil Construction Company of CO
NPDES ID	COG317261
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	May 15, 2026
Expiration date	May 31, 2028
Address	Boulder, CO 80302
Receiving water	South Boulder Creek
Subwatershed	City of Boulder-Boulder Creek (HUC 101900050406)

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

Effluent limits and exceedances

115Pollutants on file
115Under a numeric limit
0With a violation of any kind
0With 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 115 are shown.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Copper, potentially dissolved	4	0	0
Lead, potentially dissolvd	4	0	0
Arsenic, total recoverable	3	0	0
Iron, total recoverable	3	0	0
Mercury, total [as Hg]	3	0	0
1,4-Dioxane	3	0	0
pH	2	0	0
Solids, total suspended	2	0	0
Selenium, total recoverable	2	0	0
Thallium, total recoverable	2	0	0
Beryllium, total recoverable [as Be]	2	0	0
Barium, total recoverable	2	0	0
Iron, dissolved [as Fe]	2	0	0
Manganese, dissolved [as Mn]	2	0	0
Nickel, total recoverable	2	0	0
Silver total recoverable	2	0	0
Zinc, total recoverable	2	0	0
Aluminum, total recoverable	2	0	0
Cadmium, total recoverable	2	0	0
Lead, total recoverable	2	0	0
Chromium, total recoverable	2	0	0
Copper, total recoverable	2	0	0
Molybdenum, total recoverable	2	0	0
Chromium, hexavalent dissolved [as Cr]	2	0	0
Antimony, total recoverable	2	0	0
Zinc, potentially dissolved	2	0	0
Silver, potentially dissolved	2	0	0
Arsenic, potentially dissolved	2	0	0
Cadmium, potentially dissolvd	2	0	0
Chromium, trivalent, potentially dissolvd	2	0	0
Manganese, potentially dissolvd	2	0	0
Nickel, potentially dissolvd	2	0	0
Selenium, potentially dissolvd	2	0	0
Thallium, potentially dissolvd	2	0	0
Uranium, potentially dissolvd	2	0	0
Total phenols	2	0	0
Chromium, trivalent total recoverable	2	0	0
Uranium, total	2	0	0
Carbon tetrachloride	2	0	0
1,2-Dichloroethane	2	0	0
Bromoform	2	0	0
Chloroform	2	0	0
Toluene	2	0	0
Benzene	2	0	0
Acenaphthene	2	0	0
Acrolein	2	0	0
Anthracene	2	0	0
Benzo[k]fluoranthene	2	0	0
Benzo[a]pyrene	2	0	0
Bis[2-chloroethyl] ether	2	0	0
Bis[2-chloroisopropyl] ether	2	0	0
Butyl benzyl phthalate	2	0	0
Chlorobenzene	2	0	0
Chlorodibromomethane	2	0	0
Chrysene	2	0	0
Diethyl phthalate	2	0	0
Dimethyl phthalate	2	0	0
1,2-Diphenylhydrazine	2	0	0
Fluoranthene	2	0	0
Fluorene	2	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG317261.

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 COG317261.

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 COG317261 there.

Nearby on the register

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