Clean Water Act discharge permit · NPDES COG591010
PURGATORY METROPOLITAN DIST, Durango, CO: NPDES COG591010 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 77Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
PURGATORY METROPOLITAN DIST, held by Purgatory Metro District, holds NPDES permit COG591010, which discharges to Unnamed Drainage Tributary To Cascade Creek. EPA’s file records it issued July 8, 2024 and expiring December 31, 2028. 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 | PURGATORY METROPOLITAN DIST |
|---|---|
| Permittee as filed | Purgatory Metro District |
| NPDES ID | COG591010 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 8, 2024 |
| Expiration date | December 31, 2028 |
| Address | Durango, CO 81301 |
| Receiving water | unnamed drainage tributary to Cascade Creek |
| Subwatershed | Outlet Cascade Creek (HUC 140801040203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 77Pollutants on file
- 77Under a numeric limit
- 72With 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; the 60 with the most exceedances of 77 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 24 | 44 | 44 | July 31, 2026 | 1,028% over the limit |
| Sulfide-hydrogen sulfide [undissociated] | 2 | 25 | 22 | July 31, 2026 | 29,966,566% over the limit |
| Chloride [as Cl] | 2 | 20 | 17 | July 31, 2026 | 573% over the limit |
| Sulfate | 1 | 20 | 17 | July 31, 2026 | 104% over the limit |
| Arsenic, total recoverable | 3 | 16 | 14 | July 31, 2026 | 99,900% over the limit |
| E. coli | 2 | 13 | 11 | July 31, 2026 | 99,999% over the limit |
| Nitrogen, inorganic total | 2 | 7 | 6 | July 31, 2026 | 168% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 3 | 1 | November 30, 2024 | 49,820% over the limit |
| Chlorine, total residual | 2 | 3 | 1 | October 31, 2025 | 689% over the limit |
| Chromium, hexavalent dissolved [as Cr] | 2 | 8 | 0 | ||
| Zinc, potentially dissolved | 2 | 8 | 0 | ||
| Silver, potentially dissolved | 2 | 8 | 0 | ||
| Cadmium, potentially dissolvd | 2 | 8 | 0 | ||
| Lead, potentially dissolvd | 2 | 8 | 0 | ||
| Nickel, potentially dissolvd | 2 | 8 | 0 | ||
| Selenium, potentially dissolvd | 2 | 8 | 0 | ||
| Uranium, potentially dissolvd | 2 | 8 | 0 | ||
| Aluminum, total recoverable | 3 | 6 | 0 | ||
| Copper, potentially dissolved | 2 | 6 | 0 | ||
| Manganese, potentially dissolvd | 2 | 6 | 0 | ||
| Iron, dissolved [as Fe] | 1 | 5 | 0 | ||
| Nickel, total recoverable | 1 | 4 | 0 | ||
| Cadmium, total recoverable | 1 | 4 | 0 | ||
| Lead, total recoverable | 1 | 4 | 0 | ||
| Molybdenum, total recoverable | 1 | 4 | 0 | ||
| Arsenic, potentially dissolved | 1 | 4 | 0 | ||
| Chromium, trivalent, potentially dissolvd | 1 | 4 | 0 | ||
| Chromium, trivalent total recoverable | 1 | 4 | 0 | ||
| Mercury, total [as Hg] | 1 | 4 | 0 | ||
| Manganese, dissolved [as Mn] | 1 | 3 | 0 | ||
| Perfluorooctanoic acid (PFOA) | 2 | 2 | 0 | ||
| Perfluorobutanoic acid (PFBA) | 2 | 2 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 2 | 2 | 0 | ||
| Perfluoropentanoic acid (PFPeA) | 2 | 2 | 0 | ||
| Perfluorohexanoic acid (PFHxA) | 2 | 2 | 0 | ||
| Perfluoroheptanoic acid (PFHpA) | 2 | 2 | 0 | ||
| Perfluorononanoic acid (PFNA) | 2 | 2 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 2 | 2 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 2 | 2 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 2 | 2 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 2 | 2 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 2 | 2 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 2 | 2 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 2 | 2 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 2 | 2 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 2 | 2 | 0 | ||
| Perfluorobutanesulfonic acid (PFBS) | 2 | 2 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 2 | 2 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 2 | 2 | 0 | ||
| Perfluorohexanesulfonic acid (PFHxS) | 2 | 2 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 2 | 2 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 2 | 2 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 2 | 2 | 0 | ||
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 2 | 2 | 0 | ||
| Perfluoropentanesulfonic acid (PFPeS) | 2 | 2 | 0 | ||
| Perfluorononanesulfonic acid (PFNS) | 2 | 2 | 0 | ||
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 2 | 2 | 0 | ||
| Perfluoro-2-methoxypropanoic acid | 2 | 2 | 0 | ||
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | 2 | 2 | 0 | ||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | 2 | 2 | 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 COG591010.
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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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.