Clean Water Act discharge permit · NPDES CO0020311
SILVERTON TOWN OF WWTF, Silverton, CO: NPDES CO0020311 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 19Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
SILVERTON TOWN OF WWTF, held by Silverton Town of, holds NPDES permit CO0020311, which discharges to Animas River. EPA’s file records it issued November 28, 2012 and expiring December 31, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SILVERTON TOWN OF WWTF |
|---|---|
| Permittee as filed | Silverton Town of |
| NPDES ID | CO0020311 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 28, 2012 |
| Expiration date | December 31, 2017 |
| Address | Silverton, CO 81433 |
| Receiving water | ANIMAS RIVER |
| Subwatershed | Mineral Creek (HUC 140801040103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 23Pollutants on file
- 19Under a numeric limit
- 22With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 6 | 59 | 29 | August 31, 2023 | 107% over the limit |
| pH | 2 | 25 | 17 | October 31, 2024 | |
| Chlorine, total residual | 1 | 16 | 10 | November 30, 2025 | 270% over the limit |
| E. coli, thermotol, MF, MTEC | 0 | 14 | 8 | August 31, 2009 | 860% over the limit |
| E. coli | 2 | 7 | 5 | January 31, 2021 | 99,999% over the limit |
| Lead, potentially dissolvd | 2 | 33 | 3 | September 30, 2025 | 26% over the limit |
| Solids, total suspended | 4 | 20 | 2 | September 30, 2020 | 19% over the limit |
| BOD, 5-day, percent removal | 1 | 4 | 2 | October 31, 2020 | 33% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 8 | 1 | February 28, 2014 | 74% over the limit |
| Coliform, fecal general | 0 | 1 | 1 | April 30, 2005 | 42% over the limit |
| Zinc, potentially dissolved | 2 | 32 | 0 | ||
| Manganese, potentially dissolvd | 2 | 32 | 0 | ||
| Copper, potentially dissolved | 2 | 30 | 0 | ||
| Cadmium, potentially dissolvd | 2 | 30 | 0 | ||
| Aluminum, total recoverable | 2 | 26 | 0 | ||
| Iron, total recoverable | 1 | 14 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 10 | 0 | ||
| Solids, total dissolved | 4 | 6 | 0 | ||
| Oil and grease visual | 1 | 3 | 0 | ||
| Oil and grease | 1 | 2 | 0 | ||
| Iron, dissolved [as Fe] | 0 | 2 | 0 | ||
| Aluminum, dissolved [as Al] | 0 | 2 | 0 | ||
| Plant capacity fact. percent of capacity | 2 | 0 | 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 CO0020311.
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 CO0020311 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.