Clean Water Act discharge permit · NPDES COG591199
MANASSA WWTF, Manassa, CO: NPDES COG591199 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 78Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
MANASSA WWTF, held by Manassa Town of, holds NPDES permit COG591199, which discharges to Manassa Eastfield Ditch To N Branch Of Conejos Riv. EPA’s file records it issued June 5, 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 | MANASSA WWTF |
|---|---|
| Permittee as filed | Manassa Town of |
| NPDES ID | COG591199 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 5, 2024 |
| Expiration date | December 31, 2028 |
| Address | Manassa, CO 81141 |
| Receiving water | Manassa Eastfield Ditch to N Branch of Conejos Riv |
| Subwatershed | McIntire Spring-Conejos River (HUC 130100050408) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 78Pollutants on file
- 78Under a numeric limit
- 37With a violation of any kind
- 8With 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 78 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| E. coli | 2 | 33 | 23 | June 30, 2026 | 417% over the limit |
| Sulfide-hydrogen sulfide [undissociated] | 2 | 25 | 20 | June 30, 2026 | 24,900% over the limit |
| BOD, 5-day, percent removal | 1 | 20 | 15 | June 30, 2026 | 233% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 28 | 14 | June 30, 2026 | 363% over the limit |
| Solids, total suspended | 4 | 20 | 8 | February 28, 2026 | 145% over the limit |
| Nitrogen, ammonia total [as N] | 24 | 14 | 4 | September 30, 2025 | 49% over the limit |
| Nitrogen, inorganic total | 1 | 9 | 4 | October 31, 2025 | 132% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 13 | 1 | June 30, 2025 | 17% over the limit |
| pH | 2 | 10 | 0 | ||
| Chloride [as Cl] | 2 | 5 | 0 | ||
| Nitrogen, nitrite total [as N] | 1 | 5 | 0 | ||
| Oil and grease | 1 | 5 | 0 | ||
| Chlorine, total residual | 1 | 5 | 0 | ||
| Sulfate | 1 | 5 | 0 | ||
| Oil and grease visual | 1 | 5 | 0 | ||
| Plant capacity fact. percent of capacity | 2 | 2 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 2 | 2 | 0 | ||
| Zinc, potentially dissolved | 2 | 2 | 0 | ||
| Silver, potentially dissolved | 2 | 2 | 0 | ||
| Copper, potentially dissolved | 2 | 2 | 0 | ||
| Cadmium, potentially dissolvd | 2 | 2 | 0 | ||
| Lead, potentially dissolvd | 2 | 2 | 0 | ||
| Manganese, potentially dissolvd | 2 | 2 | 0 | ||
| Nickel, potentially dissolvd | 2 | 2 | 0 | ||
| Selenium, potentially dissolvd | 2 | 2 | 0 | ||
| Arsenic, total recoverable | 1 | 1 | 0 | ||
| Iron, total recoverable | 1 | 1 | 0 | ||
| Iron, dissolved [as Fe] | 1 | 1 | 0 | ||
| Manganese, dissolved [as Mn] | 1 | 1 | 0 | ||
| Nickel, total recoverable | 1 | 1 | 0 | ||
| Cadmium, total recoverable | 1 | 1 | 0 | ||
| Lead, total recoverable | 1 | 1 | 0 | ||
| Molybdenum, total recoverable | 1 | 1 | 0 | ||
| Arsenic, potentially dissolved | 1 | 1 | 0 | ||
| Chromium, trivalent, potentially dissolvd | 1 | 1 | 0 | ||
| Chromium, trivalent total recoverable | 1 | 1 | 0 | ||
| Mercury, total [as Hg] | 1 | 1 | 0 | ||
| Perfluorooctanoic acid (PFOA) | 2 | 0 | 0 | ||
| Perfluorobutanoic acid (PFBA) | 2 | 0 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 2 | 0 | 0 | ||
| Perfluoropentanoic acid (PFPeA) | 2 | 0 | 0 | ||
| Perfluorohexanoic acid (PFHxA) | 2 | 0 | 0 | ||
| Perfluoroheptanoic acid (PFHpA) | 2 | 0 | 0 | ||
| Perfluorononanoic acid (PFNA) | 2 | 0 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 2 | 0 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 2 | 0 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 2 | 0 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 2 | 0 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 2 | 0 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 2 | 0 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 2 | 0 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 2 | 0 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 2 | 0 | 0 | ||
| Perfluorobutanesulfonic acid (PFBS) | 2 | 0 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 2 | 0 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 2 | 0 | 0 | ||
| Perfluorohexanesulfonic acid (PFHxS) | 2 | 0 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 2 | 0 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 2 | 0 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 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 COG591199.
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 COG591199 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.