Clean Water Act discharge permit · NPDES MOG640020
HAMILTON MUNICIPAL WTP, Hamilton, MO: NPDES MOG640020 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 21Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
HAMILTON MUNICIPAL WTP, held by City of Hamilton, holds NPDES permit MOG640020, which discharges to Tributary To Tom Creek. EPA’s file records it issued April 1, 2024 and expiring February 24, 2029. 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 | HAMILTON MUNICIPAL WTP |
|---|---|
| Permittee as filed | City of Hamilton |
| NPDES ID | MOG640020 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 1, 2024 |
| Expiration date | February 24, 2029 |
| Address | Hamilton, MO 64644 |
| Receiving water | Tributary to Tom Creek |
| Subwatershed | Tom Creek (HUC 102801011501) |
| SIC | 4941 – Water Supply |
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
- 21Pollutants on file
- 21Under a numeric limit
- 21With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Solids, settleable | 4 | 18 | 9 | March 31, 2018 | 39,900% over the limit |
| pH | 5 | 7 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 6 | 0 | ||
| Chlorine, total residual | 4 | 6 | 0 | ||
| Phosphorus, total [as P] | 2 | 4 | 0 | ||
| Total production - mass | 2 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 2 | 0 | ||
| Sodium, total [as Na] | 2 | 2 | 0 | ||
| Chloride [as Cl] | 2 | 2 | 0 | ||
| Arsenic, total [as As] | 2 | 2 | 0 | ||
| Cadmium, total [as Cd] | 2 | 2 | 0 | ||
| Chromium, total [as Cr] | 2 | 2 | 0 | ||
| Copper, total [as Cu] | 2 | 2 | 0 | ||
| Lead, total [as Pb] | 2 | 2 | 0 | ||
| Molybdenum, total [as Mo] | 2 | 2 | 0 | ||
| Nickel, total [as Ni] | 2 | 2 | 0 | ||
| Zinc, total [as Zn] | 2 | 2 | 0 | ||
| Aluminum, total [as Al] | 2 | 2 | 0 | ||
| Selenium, total [as Se] | 2 | 2 | 0 | ||
| Mercury, total [as Hg] | 2 | 2 | 0 | ||
| Report due [yrmoda] | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 17, 2026 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 14, 2020 | Permit Violations - Unapproved Operation | 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 MOG640020 there.
Nearby on the register
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- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.