Clean Water Act discharge permit · NPDES CO0047457
DURANGO/LA PLATA COUNTY AIRPORT, La Plata County, CO: NPDES CO0047457 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 12Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
DURANGO/LA PLATA COUNTY AIRPORT, held by Durango La Plata County Airport, holds NPDES permit CO0047457, which discharges to Florida River. EPA’s file records it issued December 20, 2012 and expiring January 31, 2018. 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 | DURANGO/LA PLATA COUNTY AIRPORT |
|---|---|
| Permittee as filed | Durango La Plata County Airport |
| NPDES ID | CO0047457 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 20, 2012 |
| Expiration date | January 31, 2018 |
| Address | La Plata County, CO 81303 |
| Receiving water | Florida River |
| Subwatershed | Cottonwood Gulch-Florida River (HUC 140801040803) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 12Under a numeric limit
- 18With a violation of any kind
- 9With 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 | 138 | 28 | September 30, 2018 | 285% over the limit |
| Chlorine, total residual | 4 | 71 | 20 | July 31, 2024 | 260% over the limit |
| Solids, total suspended | 4 | 92 | 9 | June 30, 2020 | 87% over the limit |
| BOD, 5-day, percent removal | 1 | 35 | 9 | September 30, 2018 | 287% over the limit |
| Nitrogen, ammonia total [as N] | 26 | 66 | 7 | February 29, 2020 | 84% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 0 | 7 | 7 | May 31, 2023 | 69% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 0 | 5 | 5 | January 31, 2025 | 72% over the limit |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | 0 | 4 | 4 | December 31, 2023 | 69% over the limit |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 2 | 2 | June 30, 2023 | 99% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 100 | 0 | ||
| E. coli, thermotol, MF, MTEC | 0 | 55 | 0 | ||
| pH | 2 | 53 | 0 | ||
| Solids, total dissolved | 4 | 34 | 0 | ||
| Oil and grease | 1 | 25 | 0 | ||
| Oil and grease visual | 1 | 25 | 0 | ||
| Plant capacity fact. percent of capacity | 2 | 10 | 0 | ||
| E. coli | 2 | 2 | 0 | ||
| Lead, total recoverable | 0 | 1 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 1, 2021 | Effluent Violations - Failed Toxicity Test | ST6 |
| January 1, 2020 | Effluent Violations - Failed Toxicity Test | ST6 |
| January 1, 2019 | Effluent Violations - Failed Toxicity Test | ST6 |
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 CO0047457 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.