Clean Water Act discharge permit · NPDES MO0049492
ALTON WWTP, Alton, MO: NPDES MO0049492 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
ALTON WWTP, held by City of Alton, holds NPDES permit MO0049492, which discharges to Piney Cr.. EPA’s file records it issued November 3, 2015 and expiring June 30, 2020. 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 | ALTON WWTP |
|---|---|
| Permittee as filed | City of Alton |
| NPDES ID | MO0049492 |
| 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 | November 3, 2015 |
| Expiration date | June 30, 2020 |
| Address | Alton, MO 65606 |
| Receiving water | Piney Cr. |
| Subwatershed | Piney Creek (HUC 110100110304) |
| 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
- 15Pollutants on file
- 14Under a numeric limit
- 15With a violation of any kind
- 7With 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 | 29 | 11 | December 31, 2018 | |
| Nitrogen, ammonia total [as N] | 4 | 25 | 7 | December 31, 2022 | 208% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 36 | 5 | November 30, 2019 | 80% over the limit |
| Solids, total suspended | 3 | 31 | 4 | December 31, 2017 | 123% over the limit |
| Coliform, fecal general | 0 | 3 | 3 | March 31, 2008 | 99,900% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 6 | 2 | June 30, 2024 | 107% over the limit |
| E. coli | 2 | 19 | 1 | February 28, 2017 | 310% over the limit |
| Oxygen, dissolved [DO] | 2 | 18 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 18 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 18 | 0 | ||
| Chlorine, total residual | 2 | 18 | 0 | ||
| Nitrogen, total [as N] | 2 | 4 | 0 | ||
| Phosphorus, total [as P] | 2 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 1 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 24, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| April 24, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| April 5, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| August 2, 2021 | Effluent Violations - Numeric effluent violation | 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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Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.