Clean Water Act discharge permit · NPDES WY0020320
KEMMERER WASTEWATER TREATMENT, (Unknown City), WY: NPDES WY0020320 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
KEMMERER WASTEWATER TREATMENT, held by Kemmerer-Diamondville Joint Powers Board, holds NPDES permit WY0020320. EPA’s file records it issued August 1, 2025 and expiring August 31, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | KEMMERER WASTEWATER TREATMENT |
|---|---|
| Permittee as filed | Kemmerer-Diamondville Joint Powers Board |
| NPDES ID | WY0020320 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 1, 2025 |
| Expiration date | August 31, 2028 |
| Issuing agency | Wyoming Department of Environmental Quality |
| Address | (Unknown City), WY |
| Subwatershed | Oakley Draw-Hams Fork (HUC 140401070701) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 21Pollutants on file
- 20Under a numeric limit
- 7With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Solids, total dissolved | 7 | 26 | 26 | December 31, 2011 | 166% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 2 | 2 | January 31, 2013 | 97% over the limit |
| Solids, total suspended | 12 | 32 | 1 | February 28, 2013 | 329% over the limit |
| E. coli | 8 | 1 | 1 | January 31, 2013 | 7% over the limit |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 1 | September 30, 2016 | |
| Solids, suspended percent removal | 2 | 11 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 1 | 0 | ||
| BOD, 5-day, 20 deg. C | 12 | 0 | 0 | ||
| Chlorine, total residual | 8 | 0 | 0 | ||
| Temperature, water deg. centigrade | 6 | 0 | 0 | ||
| pH | 6 | 0 | 0 | ||
| Flow | 4 | 0 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 4 | 0 | 0 | ||
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | 4 | 0 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 0 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Duration | 2 | 0 | 0 | ||
| BOD, 5-day, percent removal | 2 | 0 | 0 | ||
| Produced water, oil and grease | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 21, 2026 | Management Practice Violations - Failure to Maintain Records | ST6 |
| May 21, 2026 | Reporting Violations - Improper/ Incorrect Reporting | 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 14, 2026.