Clean Water Act discharge permit · NPDES COG604476
MURPHY USA - MISSISSIPPI & CHAMBERS, Aurora, CO: NPDES COG604476 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MURPHY USA - MISSISSIPPI & CHAMBERS, held by KTK General Contracting Limitied, holds NPDES permit COG604476, which discharges to West Tollgate Creek. EPA’s file records it issued July 7, 2025 and expiring December 31, 2026. 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 | MURPHY USA - MISSISSIPPI & CHAMBERS |
|---|---|
| Permittee as filed | KTK General Contracting Limitied |
| NPDES ID | COG604476 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 7, 2025 |
| Expiration date | December 31, 2026 |
| Address | Aurora, CO 80012 |
| Receiving water | West Tollgate Creek |
| Subwatershed | Barr Lake (HUC 101900030501) |
| SIC | 5984 – Liquefied Petroleum Gas Dealers |
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
- 8Pollutants on file
- 8Under a numeric limit
- 8With 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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| pH | 2 | 24 | 0 | ||
| Solids, total suspended | 2 | 24 | 0 | ||
| Chlorine, total residual | 2 | 24 | 0 | ||
| Oil and grease | 1 | 12 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 12 | 0 | ||
| Flow, total | 1 | 12 | 0 | ||
| Duration of discharge | 1 | 12 | 0 | ||
| Oil and grease visual | 1 | 12 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG604476.
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 COG604476.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, COG604476.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 COG604476 there.
Nearby on the register
- Discharge permits in Aurora
- Every permit record in Aurora, A to Z
- Discharge permits in Colorado
- Every permit record in Colorado, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.