Clean Water Act discharge permit · NPDES COG641183
MILL CREEK PARK WATER TREATMENT FACILITY, Dumont, CO: NPDES COG641183 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
MILL CREEK PARK WATER TREATMENT FACILITY, held by Mill Creek Park Water and Improvement Assoc, holds NPDES permit COG641183, which discharges to Mill Creek. EPA’s file records it issued October 27, 2015 and expiring September 30, 2016. 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 | MILL CREEK PARK WATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | Mill Creek Park Water and Improvement Assoc |
| NPDES ID | COG641183 |
| 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 27, 2015 |
| Expiration date | September 30, 2016 |
| Address | Dumont, CO 80436 |
| Receiving water | Mill Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Mill Creek-Clear Creek (HUC 101900040202) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 8Under a numeric limit
- 8With 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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Chlorine, total residual | 4 | 6 | 2 | September 30, 2019 | 216% over the limit |
| Zinc, potentially dissolved | 4 | 5 | 1 | December 31, 2021 | 24% over the limit |
| pH | 4 | 4 | 0 | ||
| Solids, total suspended | 4 | 4 | 0 | ||
| Cadmium, potentially dissolvd | 4 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Oil and grease | 2 | 2 | 0 | ||
| Oil and grease visual | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 14, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| December 14, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
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 COG641183 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.