Clean Water Act discharge permit · NPDES MO0023205
ASH GROVE WWTP, Ash Grove, MO: NPDES MO0023205 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 12Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
ASH GROVE WWTP, held by City of Ash Grove, holds NPDES permit MO0023205, which discharges to Sac R.. EPA’s file records it issued June 19, 2019 and expiring December 31, 2023. 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 | ASH GROVE WWTP |
|---|---|
| Permittee as filed | City of Ash Grove |
| NPDES ID | MO0023205 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 19, 2019 |
| Expiration date | December 31, 2023 |
| Address | Ash Grove, MO 65604 |
| Receiving water | Sac R. |
| Subwatershed | Dry Branch-Sac River (HUC 102901060206) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 13Pollutants on file
- 12Under a numeric limit
- 13With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 6 | 38 | 8 | May 31, 2023 | 883% over the limit |
| E. coli | 2 | 10 | 6 | June 30, 2025 | 99,999% over the limit |
| E. coli, colony forming units [CFU] | 0 | 16 | 4 | May 31, 2017 | 99,999% over the limit |
| Solids, total suspended | 2 | 32 | 2 | October 31, 2015 | 93% over the limit |
| pH | 2 | 29 | 1 | March 31, 2008 | |
| BOD, 5-day, 20 deg. C | 2 | 30 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 26 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 10 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 8 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 8 | 0 | ||
| Phosphorus, total [as P] | 4 | 8 | 0 | ||
| BOD, 5-day, percent removal | 1 | 2 | 0 | ||
| Solids, suspended percent removal | 1 | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 23, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| September 25, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| August 31, 2022 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| August 31, 2022 | Management Practice Violations - No Licensed/Certified Operator | ST6 |
| January 29, 2018 | Effluent Violations - Narrative Effluent Violation | ST6 |
| January 29, 2018 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| January 29, 2018 | Permit Violations - Violation Specified in Comment | 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 MO0023205 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.