Clean Water Act discharge permit · NPDES COG641044
BIG MAC WATER TREATMENT PLANT, Grand County, CO: NPDES COG641044 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
BIG MAC WATER TREATMENT PLANT, held by Grand County Water and Sanitation 1, holds NPDES permit COG641044, which discharges to Vasquez Creek. EPA’s file records it issued December 29, 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 | BIG MAC WATER TREATMENT PLANT |
|---|---|
| Permittee as filed | Grand County Water and Sanitation 1 |
| NPDES ID | COG641044 |
| 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 | December 29, 2005 |
| Expiration date | October 31, 2010 |
| Address | Grand County, CO 80482 |
| Receiving water | VASQUEZ CREEK |
| Subwatershed | Vasquez Creek (HUC 140100010201) |
| SIC | 4941 – Water Supply |
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
- 7Pollutants on file
- 7Under a numeric limit
- 7With a violation of any kind
- 1With 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 | 8 | 111 | 1 | June 30, 2021 | 160% over the limit |
| pH | 8 | 110 | 0 | ||
| Solids, total suspended | 8 | 110 | 0 | ||
| Chlorine, total residual | 8 | 110 | 0 | ||
| Solids, total dissolved | 6 | 110 | 0 | ||
| Oil and grease | 4 | 55 | 0 | ||
| Oil and grease visual | 4 | 55 | 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 COG641044.
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, COG641044.
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 COG641044 there.
Nearby on the register
- Discharge permits in Grand County
- Every permit record in Grand County, 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.