Clean Water Act discharge permit · NPDES COG589159
OAK CREEK TOWN OF, Oak Creek, CO: NPDES COG589159 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 51Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
OAK CREEK TOWN OF, held by Oak Creek Town of, holds NPDES permit COG589159, which discharges to Oak Creek. EPA’s file records it issued October 29, 2021 and expiring September 30, 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 | OAK CREEK TOWN OF |
|---|---|
| Permittee as filed | Oak Creek Town of |
| NPDES ID | COG589159 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | October 29, 2021 |
| Expiration date | September 30, 2028 |
| Address | Oak Creek, CO 80467 |
| Receiving water | Oak Creek |
| Subwatershed | Outlet Oak Creek (HUC 140500010404) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 51Pollutants on file
- 51Under a numeric limit
- 51With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 24 | 23 | 11 | March 31, 2025 | 338% over the limit |
| BOD, 5-day, percent removal | 1 | 15 | 8 | April 30, 2026 | 47% over the limit |
| Solids, suspended percent removal | 1 | 15 | 8 | June 30, 2026 | 273% over the limit |
| E. coli | 2 | 17 | 5 | June 30, 2024 | 1,080% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 27 | 3 | April 30, 2024 | 60% over the limit |
| Sulfide-hydrogen sulfide [undissociated] | 1 | 12 | 3 | August 31, 2025 | 2,900% over the limit |
| Manganese, dissolved [as Mn] | 2 | 10 | 3 | August 31, 2024 | 42% over the limit |
| Iron, dissolved [as Fe] | 1 | 10 | 3 | December 31, 2025 | 94% over the limit |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | 3 | 11 | 2 | December 31, 2024 | 99,999% over the limit |
| Static Renewal 7 Day Chronic Pimephales promelas | 3 | 10 | 1 | December 31, 2023 | 40% over the limit |
| Iron, total recoverable | 2 | 9 | 1 | August 31, 2024 | 142% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 40 | 0 | ||
| Sodium adsorption ratio | 4 | 32 | 0 | ||
| Solids, total suspended | 4 | 26 | 0 | ||
| Zinc, potentially dissolved | 3 | 24 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 2 | 18 | 0 | ||
| Silver, potentially dissolved | 2 | 18 | 0 | ||
| Copper, potentially dissolved | 2 | 18 | 0 | ||
| Cadmium, potentially dissolvd | 2 | 18 | 0 | ||
| Lead, potentially dissolvd | 2 | 18 | 0 | ||
| Nickel, potentially dissolvd | 2 | 18 | 0 | ||
| Selenium, potentially dissolvd | 2 | 18 | 0 | ||
| Bicarbonate ion- [as HCO3] | 2 | 16 | 0 | ||
| Calcium, total recoverable | 2 | 16 | 0 | ||
| Magnesium, total recoverable | 2 | 16 | 0 | ||
| Sodium, total recoverable | 2 | 16 | 0 | ||
| Sodium Absorption Ratio | 2 | 16 | 0 | ||
| Manganese, potentially dissolvd | 2 | 14 | 0 | ||
| Plant capacity fact. percent of capacity | 2 | 13 | 0 | ||
| Temperature, water deg. centigrade | 4 | 12 | 0 | ||
| Chlorine, total residual | 4 | 12 | 0 | ||
| pH | 2 | 12 | 0 | ||
| Cyanide, weak acid, dissociable | 1 | 11 | 0 | ||
| Arsenic, total recoverable | 2 | 9 | 0 | ||
| Chloride [as Cl] | 1 | 9 | 0 | ||
| Nickel, total recoverable | 1 | 9 | 0 | ||
| Cadmium, total recoverable | 1 | 9 | 0 | ||
| Lead, total recoverable | 1 | 9 | 0 | ||
| Molybdenum, total recoverable | 1 | 9 | 0 | ||
| Arsenic, potentially dissolved | 1 | 9 | 0 | ||
| Chromium, trivalent, potentially dissolvd | 1 | 9 | 0 | ||
| Chromium, trivalent total recoverable | 1 | 9 | 0 | ||
| Radium 226 + radium 228, total | 1 | 9 | 0 | ||
| Uranium, total | 1 | 9 | 0 | ||
| Mercury, total [low level] | 1 | 9 | 0 | ||
| Sulfate | 1 | 9 | 0 | ||
| Conductivity | 1 | 8 | 0 | ||
| Solids, total dissolved | 3 | 6 | 0 | ||
| Nitrogen, inorganic total | 2 | 6 | 0 | ||
| Oil and grease | 1 | 6 | 0 | ||
| Oil and grease visual | 1 | 6 | 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 |
|---|---|---|
| April 1, 2024 | Effluent Violations - Failed Toxicity Test | ST6 |
| April 1, 2024 | Monitoring Violations - Failure to Monitor for Toxicity Requirements | ST6 |
| January 1, 2024 | 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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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.