CITY OF HAMILTON WASTEWATER TREATMENT PLANT
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
T6N R21W S25 NW
HAMILTON, MT 59840
View on map ↗ - County
- RAVALLI County
- Inspections
- 3 · last Nov 19, 2025
- Total Penalties
- $0
- Registry ID
- 110002046946
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
Qtrs Non-Compliant
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Mar 3, 2020 | Jun 17, 2020 | Resolved |
| cwa | Schedule Event achieved late but reported | Aug 19, 2016 | — | Open |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Dec 29, 2015 | May 12, 2016 | Resolved |
| cwa | Monitoring Violations - Improper Analysis or Lab Error | Jan 9, 2014 | Feb 27, 2014 | Resolved |
| cwa | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | Jun 20, 2013 | Jul 24, 2013 | Resolved |
| cwa | WW SSO - Overflow to Dry Land or Building Backup | Jun 20, 2013 | Jul 24, 2013 | Resolved |
| cwa | WW SSO - Failure to report violation that may endanger public health 122.41(l)(7) | Jun 20, 2013 | Jul 24, 2013 | Resolved |
| cwa | Monitoring Violations - Improper Analysis or Lab Error | Dec 20, 2011 | Mar 1, 2012 | Resolved |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Dec 20, 2011 | Mar 1, 2012 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Solids, total suspended | DMR, Limited - Numeric Violation | 119.54 kg/d | 106.24 | +13% | Aug 2016 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.63 mg/L | 0.50 | +26% | Feb 2016 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.85 mg/L | 0.50 | +70% | Jan 2016 | Resolved |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 275.42 MPN/100mL | 252.00 | +9% | Oct 2015 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.63 mg/L | 0.50 | +26% | May 2015 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.58 mg/L | 0.50 | +16% | Apr 2015 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.63 mg/L | 0.50 | +26% | Mar 2015 | Resolved |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.