Clean Water Act discharge permit · NPDES MO0099635
EUREKA DWTP, Eureka, MO: NPDES MO0099635 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
EUREKA DWTP, held by PUBLIC WATER SUPPLY DISTRICT NO. 2, holds NPDES permit MO0099635, which discharges to Big R.. EPA’s file records it issued January 22, 2026 and expiring January 31, 2031. 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 | EUREKA DWTP |
|---|---|
| Permittee as filed | PUBLIC WATER SUPPLY DISTRICT NO. 2 |
| NPDES ID | MO0099635 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 22, 2026 |
| Expiration date | January 31, 2031 |
| Address | Eureka, MO 63025 |
| Receiving water | Big R. |
| Subwatershed | Big River (HUC 071401040407) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 20Pollutants on file
- 6Under a numeric limit
- 20With 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 |
|---|---|---|---|---|---|
| pH | 2 | 124 | 41 | February 28, 2026 | |
| Chlorine, total residual | 2 | 58 | 2 | June 30, 2011 | 80% over the limit |
| Lead, total [as Pb] | 0 | 20 | 2 | March 31, 2012 | 281% over the limit |
| Solids, settleable | 2 | 55 | 1 | December 31, 2009 | 100% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 44 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 2 | 42 | 0 | ||
| Solids, total suspended | 0 | 40 | 0 | ||
| Fluoride | 0 | 40 | 0 | ||
| Zinc, total recoverable | 0 | 40 | 0 | ||
| Aluminum, total recoverable | 0 | 40 | 0 | ||
| Cadmium, total recoverable | 0 | 40 | 0 | ||
| Lead, total recoverable | 0 | 40 | 0 | ||
| Chloroform | 0 | 40 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 24 | 0 | ||
| Nitrogen, total [as N] | 0 | 24 | 0 | ||
| Phosphorus, total [as P] | 0 | 24 | 0 | ||
| Fluoride, total [as F] | 0 | 13 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 3 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 0 | 3 | 0 | ||
| Iron, total recoverable | 2 | 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
- 11Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 29, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| July 29, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| November 20, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| September 30, 2019 | Reporting Violations - Failure to Submit DMRs | ST6 |
| September 30, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 31, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| January 31, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 31, 2019 | WW Storm Water Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| January 31, 2019 | Reporting Violations - Failure to Submit DMRs | ST6 |
| September 28, 2018 | Effluent Violations - Numeric effluent violation | ST6 |
| June 29, 2018 | 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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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 MO0099635 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.