Clean Water Act discharge permit · NPDES MO0040819
HUNTSVILLE NORTHWEST WWTF, Huntsville, MO: NPDES MO0040819 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
HUNTSVILLE NORTHWEST WWTF, held by HUNTSVILLE, CITY OF, holds NPDES permit MO0040819, which discharges to Tributary To E. Fk. Little Chariton R.. EPA’s file records it issued December 8, 2015 and expiring December 31, 2020. 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 | HUNTSVILLE NORTHWEST WWTF |
|---|---|
| Permittee as filed | HUNTSVILLE, CITY OF |
| NPDES ID | MO0040819 |
| 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 | December 8, 2015 |
| Expiration date | December 31, 2020 |
| Address | Huntsville, MO 65259 |
| Receiving water | Tributary to E. Fk. Little Chariton R. |
| Subwatershed | Sugar Creek-East Fork Little Chariton River (HUC 102802030204) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 17Pollutants on file
- 11Under a numeric limit
- 16With a violation of any kind
- 10With 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] | 4 | 154 | 150 | June 30, 2026 | 1,597% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 68 | 68 | December 31, 2015 | 967% over the limit |
| E. coli | 2 | 44 | 42 | June 30, 2026 | 74,657% over the limit |
| BOD, 5-day, percent removal | 0 | 5 | 5 | March 31, 2024 | 169% over the limit |
| Solids, suspended percent removal | 0 | 5 | 5 | September 30, 2024 | 126% over the limit |
| pH | 1 | 5 | 3 | March 31, 2023 | |
| Oil and grease [soxhlet extr.] tot. | 2 | 6 | 2 | December 31, 2025 | 65% over the limit |
| Solids, total suspended | 3 | 7 | 1 | March 31, 2020 | 5% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 5 | 1 | March 31, 2025 | 40% over the limit |
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 1 | 1 | December 31, 2012 | |
| Phosphorus, total [as P] | 2 | 6 | 0 | ||
| Nitrogen, total [as N] | 2 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 2 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 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
- 14Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 2, 2024 | Reporting Violations - Failure to Submit DMRs | ST6 |
| January 10, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| December 19, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| December 19, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 19, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| December 19, 2023 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| December 27, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| September 6, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 6, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
| September 6, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| September 6, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| June 29, 2018 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 30, 2018 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 30, 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 MO0040819 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.