Clean Water Act discharge permit · NPDES CO0026671
LONGMONT WWTF, Longmont, CO: NPDES CO0026671 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 24Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
LONGMONT WWTF, held by Longmont City of, holds NPDES permit CO0026671, which discharges to St. Vrain Creek. EPA’s file records it issued October 31, 2011 and expiring November 30, 2016. 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 | LONGMONT WWTF |
|---|---|
| Permittee as filed | Longmont City of |
| NPDES ID | CO0026671 |
| 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 | October 31, 2011 |
| Expiration date | November 30, 2016 |
| Address | Longmont, CO 80501 |
| Receiving water | St. Vrain Creek |
| Subwatershed | Calkins Lake-Saint Vrain Creek (HUC 101900050706) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 83Pollutants on file
- 24Under a numeric limit
- 73With 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 83 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Coliform, fecal general | 0 | 5 | 5 | April 30, 2007 | 1,478% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 8 | 4 | August 31, 2004 | 70% over the limit |
| Chlorine, total residual | 4 | 4 | 4 | April 30, 2006 | 4,362% over the limit |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | 0 | 4 | 3 | December 31, 2006 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 10 | 2 | February 29, 2004 | 10% over the limit |
| Solids, total suspended | 6 | 6 | 2 | February 28, 2007 | 49% over the limit |
| Sulfide-hydrogen sulfide [undissociated] | 0 | 49 | 1 | August 31, 2025 | 283% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 3 | 1 | June 30, 2003 | 90% over the limit |
| Solids, suspended percent removal | 2 | 1 | 1 | February 28, 2007 | 40% over the limit |
| Iron, total recoverable | 2 | 190 | 0 | ||
| Chloride [as Cl] | 0 | 48 | 0 | ||
| Aluminum, total recoverable | 0 | 48 | 0 | ||
| Temperature, water deg. centigrade | 4 | 43 | 0 | ||
| Silver, potentially dissolved | 4 | 28 | 0 | ||
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | 6 | 21 | 0 | ||
| PFAS Sum | 0 | 11 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 6 | 0 | ||
| Perfluorohexanesulfonic acid (PFHxS) | 0 | 6 | 0 | ||
| Nonylphenol | 4 | 5 | 0 | ||
| Cyanide, weak acid, dissociable | 2 | 5 | 0 | ||
| Perfluorooctanoic acid (PFOA) | 0 | 5 | 0 | ||
| Perfluorobutanoic acid (PFBA) | 0 | 5 | 0 | ||
| Perfluoroheptanoic acid (PFHpA) | 0 | 5 | 0 | ||
| Perfluorobutanesulfonic acid (PFBS) | 0 | 5 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 0 | 5 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 0 | 5 | 0 | ||
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 0 | 5 | 0 | ||
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 0 | 5 | 0 | ||
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | 0 | 5 | 0 | ||
| Potassium 9-chlorohexadecafluoro-3-oxanonane-1-sulfonate | 0 | 5 | 0 | ||
| Potassium 11-chloroeicosafluoro-3-oxaundecane-1-sulfonate | 0 | 5 | 0 | ||
| Nitrogen, inorganic total | 0 | 4 | 0 | ||
| Total phenols | 0 | 4 | 0 | ||
| Perfluoropentanoic acid (PFPeA) | 0 | 4 | 0 | ||
| Perfluorohexanoic acid (PFHxA) | 0 | 4 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 0 | 4 | 0 | ||
| Perfluoro-2-methoxypropanoic acid | 0 | 4 | 0 | ||
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | 0 | 4 | 0 | ||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | 0 | 4 | 0 | ||
| Static Renewal 7 Day Chronic Pimephales promelas | 6 | 3 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 0 | 3 | 0 | ||
| Perfluorononanoic acid (PFNA) | 0 | 3 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 0 | 3 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 0 | 3 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 0 | 3 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 0 | 3 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 0 | 3 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 0 | 3 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 0 | 3 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 0 | 3 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 0 | 3 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 0 | 3 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 0 | 3 | 0 | ||
| Perfluoropentanesulfonic acid (PFPeS) | 0 | 3 | 0 | ||
| Perfluorononanesulfonic acid (PFNS) | 0 | 3 | 0 | ||
| Perfluorododecanesulfonic acid (PFDoS) | 0 | 3 | 0 | ||
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | 0 | 3 | 0 | ||
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | 0 | 3 | 0 | ||
| Selenium, total recoverable | 0 | 2 | 0 | ||
| Silver total recoverable | 0 | 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 CO0026671.
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.