Clean Water Act discharge permit · NPDES MO0108227
CHILLICOTHE WWTP, Chillicothe, MO: NPDES MO0108227 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
CHILLICOTHE WWTP, held by City of Chillicothe, holds NPDES permit MO0108227, which discharges to Coon Creek. EPA’s file records it issued October 2, 2017 and expiring June 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CHILLICOTHE WWTP |
|---|---|
| Permittee as filed | City of Chillicothe |
| NPDES ID | MO0108227 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 2, 2017 |
| Expiration date | June 30, 2022 |
| Address | Chillicothe, MO 64601 |
| Receiving water | Coon Creek |
| Subwatershed | Blackwell Branch-Grand River (HUC 102801011708) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 24Pollutants on file
- 20Under a numeric limit
- 18With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 2 | 116 | 22 | October 31, 2016 | 4,606% over the limit |
| Cadmium, total recoverable | 2 | 10 | 8 | March 31, 2022 | 1,567% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 122 | 4 | December 31, 2017 | 60% over the limit |
| Cyanide, free [amenable to chlorination] | 2 | 6 | 4 | March 31, 2021 | 203% over the limit |
| Lead, total recoverable | 2 | 4 | 2 | June 30, 2020 | 108% over the limit |
| Solids, total suspended | 2 | 2 | 1 | October 31, 2018 | 82% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 58 | 0 | ||
| Coliform, fecal general | 0 | 50 | 0 | ||
| Spray irrigation | 0 | 26 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 6 | 0 | ||
| Nitrogen, total [as N] | 2 | 2 | 0 | ||
| Phosphorus, total [as P] | 2 | 2 | 0 | ||
| Iron, total recoverable | 2 | 2 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 1 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 2 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 2 | 1 | 0 | ||
| Nitrogen, nitrate [NO3], [water] | 0 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [TKN] [water] | 0 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| E. coli | 2 | 0 | 0 | ||
| BOD, 5-day, percent removal | 1 | 0 | 0 | ||
| Solids, suspended percent removal | 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
- 8Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 12, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| June 12, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| June 12, 2023 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| December 22, 2017 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| March 29, 2017 | Effluent Violations - Numeric effluent violation | ST6 |
| March 29, 2017 | Permit Violations - Violation Specified in Comment | ST6 |
| March 29, 2017 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| March 29, 2017 | 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 MO0108227 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.