Clean Water Act discharge permit · NPDES COG603078

NEW CARDINAL MILL, Boulder County, CO: NPDES COG603078 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
3Pollutants with an effluent exceedance

NEW CARDINAL MILL, held by Boulder County Park and Open Space Dept, holds NPDES permit COG603078, which discharges to Coon Track Creek. EPA’s file records it issued August 19, 2008 and expiring December 31, 2012. 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	NEW CARDINAL MILL
Permittee as filed	Boulder County Park and Open Space Dept
NPDES ID	COG603078
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	August 19, 2008
Expiration date	December 31, 2012
Address	Boulder County, CO 80466
Receiving water	Coon Track Creek
Subwatershed	North Boulder Creek (HUC 101900050401)

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

Effluent limits and exceedances

11Pollutants on file
11Under a numeric limit
11With a violation of any kind
3With 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
Flow, in conduit or thru treatment plant	2	60	6	December 31, 2021	367% over the limit
pH	2	80	2	June 30, 2017
Solids, total suspended	2	80	2	December 31, 2021	16% over the limit
Zinc, potentially dissolved	2	80	0
Copper, potentially dissolved	2	80	0
Lead, potentially dissolvd	2	80	0
Mercury, total [as Hg]	2	80	0
Oil and grease visual	1	40	0
Oil and grease	1	39	0
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia	1	4	0
LC50 Static Renewal 96Hr Acute Pimephales promelas	1	4	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 COG603078.

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 COG603078 there.

Nearby on the register

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

This public-records page covers NPDES permit COG603078 for NEW CARDINAL MILL in Boulder County, CO, held by Boulder County Park and Open Space Dept, which discharges to Coon Track Creek within the North Boulder Creek subwatershed (HUC 101900050401). The permit is listed as administratively continued, with 11 pollutants on file, 11 under a numeric limit, and 3 with an effluent exceedance.