Clean Water Act discharge permit · NPDES CO0027171
MT CRESTED BUTTE WATER AND SANITATION DIST, Mount Crested Butte, CO: NPDES CO0027171 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 27Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
MT CRESTED BUTTE WATER AND SANITATION DIST, held by Mt Crested Butte WSD, holds NPDES permit CO0027171, which discharges to Woods Creek. EPA’s file records it issued May 30, 2013 and expiring June 30, 2018. 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 | MT CRESTED BUTTE WATER AND SANITATION DIST |
|---|---|
| Permittee as filed | Mt Crested Butte WSD |
| NPDES ID | CO0027171 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 30, 2013 |
| Expiration date | June 30, 2018 |
| Address | Mount Crested Butte, CO 81225 |
| Receiving water | WOODS CREEK |
| Subwatershed | Washington Gulch-Slate River (HUC 140200010206) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 54Pollutants on file
- 27Under a numeric limit
- 50With 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, percent removal | 1 | 14 | 10 | April 30, 2014 | 153% over the limit |
| Solids, suspended percent removal | 1 | 12 | 9 | April 30, 2014 | 173% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 17 | 6 | December 31, 2019 | 323% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 17 | 5 | May 31, 2008 | 42% over the limit |
| Zinc, potentially dissolved | 3 | 10 | 4 | October 31, 2011 | 126% over the limit |
| pH | 2 | 11 | 3 | December 31, 2016 | |
| Copper, potentially dissolved | 6 | 67 | 2 | May 31, 2024 | 150% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 30 | 2 | August 31, 2004 | 138% over the limit |
| Cyanide, weak acid, dissociable | 3 | 23 | 1 | December 31, 2018 | 15% over the limit |
| Mercury, total [low level] | 0 | 1 | 1 | March 31, 2026 | 70% over the limit |
| Nickel, total recoverable | 0 | 44 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 4 | 18 | 0 | ||
| Cadmium, potentially dissolvd | 4 | 17 | 0 | ||
| Solids, total dissolved | 4 | 13 | 0 | ||
| Mercury, total [as Hg] | 1 | 13 | 0 | ||
| Solids, total suspended | 4 | 12 | 0 | ||
| Silver, potentially dissolved | 4 | 12 | 0 | ||
| Lead, potentially dissolvd | 6 | 9 | 0 | ||
| Plant capacity fact. percent of capacity | 2 | 6 | 0 | ||
| Arsenic, total [as As] | 0 | 5 | 0 | ||
| Selenium, total [as Se] | 0 | 5 | 0 | ||
| Selenium, potentially dissolvd | 3 | 4 | 0 | ||
| Chlorine, total residual | 2 | 4 | 0 | ||
| Arsenic, total recoverable | 1 | 4 | 0 | ||
| Chromium, total [as Cr] | 0 | 4 | 0 | ||
| Chromium, trivalent, potentially dissolvd | 0 | 4 | 0 | ||
| Coliform, fecal general | 0 | 4 | 0 | ||
| Chromium, trivalent dissolved, as Cr | 0 | 4 | 0 | ||
| Oil and grease | 1 | 3 | 0 | ||
| Oil and grease visual | 1 | 3 | 0 | ||
| Cyanide, total [as CN] | 0 | 3 | 0 | ||
| Cadmium, total [as Cd] | 0 | 3 | 0 | ||
| Copper, total [as Cu] | 0 | 3 | 0 | ||
| Lead, total [as Pb] | 0 | 3 | 0 | ||
| Molybdenum, total [as Mo] | 0 | 3 | 0 | ||
| Nickel, total [as Ni] | 0 | 3 | 0 | ||
| Silver, total [as Ag] | 0 | 3 | 0 | ||
| Zinc, total [as Zn] | 0 | 3 | 0 | ||
| Chromium, total recoverable | 0 | 3 | 0 | ||
| Phenols | 0 | 3 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 3 | 0 | ||
| %Effect Static Renewal 7Day Chronic Pimephales promelas | 0 | 3 | 0 | ||
| Temperature, water deg. centigrade | 2 | 2 | 0 | ||
| Iron, dissolved [as Fe] | 0 | 2 | 0 | ||
| Manganese, dissolved [as Mn] | 0 | 2 | 0 | ||
| Nickel, potentially dissolvd | 0 | 2 | 0 | ||
| E. coli, thermotol, MF, MTEC | 0 | 2 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 0 | 2 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 0 | 2 | 0 | ||
| Iron, total recoverable | 0 | 1 | 0 | ||
| Nonylphenol | 3 | 0 | 0 | ||
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Static Renewal 7 Day Chronic Pimephales promelas | 3 | 0 | 0 | ||
| E. coli | 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 CO0027171.
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 CO0027171 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.