Clean Water Act discharge permit · NPDES COG588057
SOUTH DURANGO SD WWTF, La Plata County, CO: NPDES COG588057 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
SOUTH DURANGO SD WWTF, held by South Durango Sanitation District, holds NPDES permit COG588057, which discharges to Animas River. EPA’s file records it issued July 7, 2005 and expiring May 31, 2010. 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 | SOUTH DURANGO SD WWTF |
|---|---|
| Permittee as filed | South Durango Sanitation District |
| NPDES ID | COG588057 |
| 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 | July 7, 2005 |
| Expiration date | May 31, 2010 |
| Address | La Plata County, CO 81303 |
| Receiving water | ANIMAS RIVER |
| Subwatershed | Basin Creek-Animas River (HUC 140801040901) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 13Under a numeric limit
- 14With 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 |
|---|---|---|---|---|---|
| E. coli | 2 | 36 | 2 | July 31, 2012 | 1,150% over the limit |
| BOD, 5-day, 20 deg. C | 10 | 94 | 1 | February 28, 2006 | 56% over the limit |
| Coliform, fecal general | 2 | 1 | 1 | October 31, 2008 | 33% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 66 | 0 | ||
| Solids, total suspended | 6 | 62 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 34 | 0 | ||
| pH | 4 | 32 | 0 | ||
| Plant capacity fact. percent of capacity | 0 | 32 | 0 | ||
| Chlorine, total residual | 3 | 18 | 0 | ||
| Solids, total dissolved | 4 | 16 | 0 | ||
| Oil and grease | 1 | 16 | 0 | ||
| BOD, 5-day, percent removal | 1 | 16 | 0 | ||
| Solids, suspended percent removal | 1 | 16 | 0 | ||
| Oil and grease visual | 1 | 16 | 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 COG588057.
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
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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 COG588057 there.
Nearby on the register
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- Every permit record in Colorado, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.