Clean Water Act discharge permit · NPDES CO0039748
RAINBOW PARK WWTP, Fremont County, CO: NPDES CO0039748 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
RAINBOW PARK WWTP, held by Fremont Sanitation District, holds NPDES permit CO0039748, which discharges to Arkansas River. EPA’s file records it issued February 26, 2009 and expiring March 31, 2014. 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 | RAINBOW PARK WWTP |
|---|---|
| Permittee as filed | Fremont Sanitation District |
| NPDES ID | CO0039748 |
| 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 | February 26, 2009 |
| Expiration date | March 31, 2014 |
| Address | Fremont County, CO 81226 |
| Receiving water | ARKANSAS RIVER |
| Subwatershed | Brush Hollow Creek-Arkansas River (HUC 110200020408) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 20Pollutants on file
- 19Under a numeric limit
- 7With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Selenium, potentially dissolvd | 2 | 4 | 4 | June 30, 2015 | 155% over the limit |
| Mercury, total [as Hg] | 2 | 2 | 2 | April 30, 2009 | 809% over the limit |
| Silver, potentially dissolved | 3 | 1 | 1 | December 31, 2010 | 52% over the limit |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | 1 | 1 | 1 | December 31, 2015 | 15% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 34 | 0 | ||
| Cyanide, weak acid, dissociable | 3 | 2 | 0 | ||
| Phosphorus, total [as P] | 0 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 36 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 6 | 0 | 0 | ||
| Solids, total suspended | 4 | 0 | 0 | ||
| Cadmium, potentially dissolvd | 3 | 0 | 0 | ||
| Chlorine, total residual | 3 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Iron, total recoverable | 2 | 0 | 0 | ||
| E. coli, thermotol, MF, MTEC | 2 | 0 | 0 | ||
| Oil and grease | 1 | 0 | 0 | ||
| BOD, 5-day, percent removal | 1 | 0 | 0 | ||
| Solids, suspended percent removal | 1 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 0 | ||
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 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 CO0039748.
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.
Watch this permit
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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 CO0039748 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.