Clean Water Act
WALLKILL STP
Quick Summary
- •Assessed $0 in total penalties since records began.
- Address
-
600 ROUTE 211 EAST
MIDDLETOWN, NY 10940
View on map ↗ - County
- ORANGE County
- Inspections
- 5 · last Jun 30, 2025
- Total Penalties
- $0 · last Jun 7, 2002
- Registry ID
- 110019153912
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 | Schedule Event reported late | Mar 28, 2024 | — | Open |
| cwa | Schedule Event unachieved and not reported | Mar 28, 2024 | — | Open |
| cwa | Schedule Event achieved late but reported | Mar 28, 2024 | — | Open |
| cwa | Schedule Event unachieved but reported | Mar 28, 2024 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 28, 2023 | — | Open |
| cwa | Schedule Event achieved late but reported | Jul 1, 2021 | — | Open |
| cwa | Management Practice Violations - Improper Operation and Maintenance | Jan 5, 2021 | Jul 14, 2021 | Resolved |
| cwa | Schedule Event unachieved but reported | Jan 31, 2017 | Mar 18, 2019 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 31, 2017 | Mar 18, 2019 | Resolved |
| cwa | Schedule Event reported late | Jan 31, 2017 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 31, 2017 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 28, 2016 | — | Open |
| cwa | Schedule Event unachieved but reported | Jan 31, 2016 | Mar 10, 2016 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 31, 2016 | Mar 10, 2016 | Resolved |
| cwa | Schedule Event reported late | Jan 31, 2016 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 31, 2016 | — | Open |
| cwa | Schedule Event reported late | Jan 31, 2015 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 31, 2015 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 28, 2014 | — | Open |
| cwa | Schedule Event unachieved but reported | Oct 28, 2014 | Dec 4, 2014 | Resolved |
| cwa | Schedule Event unachieved and not reported | Oct 28, 2014 | Dec 4, 2014 | Resolved |
| cwa | Schedule Event reported late | Oct 28, 2014 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 28, 2013 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 31, 2013 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 28, 2012 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 28, 2011 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 31, 2011 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 28, 2010 | — | Open |
| cwa | Schedule Event unachieved and not reported | Apr 1, 2010 | Mar 29, 2011 | Resolved |
| cwa | Schedule Event unachieved and not reported | Apr 1, 2010 | Feb 3, 2011 | Resolved |
| cwa | Schedule Event reported late | Apr 1, 2010 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 1, 2010 | — | Open |
| cwa | Schedule Event unachieved but reported | Apr 1, 2010 | Feb 3, 2011 | Resolved |
| cwa | Schedule Event reported late | Apr 1, 2010 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 1, 2010 | — | Open |
| cwa | Schedule Event unachieved but reported | Apr 1, 2010 | Mar 29, 2011 | Resolved |
| cwa | Schedule Event unachieved and not reported | Oct 28, 2006 | Nov 28, 2006 | Resolved |
| cwa | Schedule Event achieved late but reported | Oct 28, 2005 | — | Open |
| cwa | Schedule Event unachieved and not reported | Feb 15, 1998 | Jun 30, 1998 | Resolved |
| cwa | Schedule Event unachieved and not reported | Feb 15, 1998 | Mar 17, 1998 | 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 |
|---|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 4.90 MGD | 4.00 | +23% | Jan 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 4.70 MGD | 4.00 | +18% | Dec 2023 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 4.30 MGD | 4.00 | +8% | Apr 2022 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 816.40 MPN/100mL | 400.00 | +104% | Sep 2021 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 79.10 % | 85.00 | +39% | Jun 2021 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 77.10 % | 85.00 | +53% | Jan 2021 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 74.90 % | 85.00 | +67% | Oct 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 38.60 mg/L | 30.00 | +29% | Oct 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 1,060.18 kg/d | 681.00 | +56% | Oct 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 140.00 mg/L | 45.00 | +211% | Oct 2019 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 47.00 mg/L | 45.00 | +4% | Jun 2019 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 83.60 % | 85.00 | +9% | Apr 2019 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 84.70 % | 85.00 | +2% | Dec 2018 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 4.10 MGD | 4.00 | +3% | Nov 2018 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 190.00 mg/L | 45.00 | +322% | Dec 2017 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 82.30 % | 85.00 | +18% | Dec 2017 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 469.80 kg/d | 454.00 | +3% | Dec 2017 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 59.00 mg/L | 40.00 | +48% | Dec 2017 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 1,870.46 kg/d | 681.00 | +175% | Dec 2017 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 51.70 mg/L | 30.00 | +72% | Dec 2017 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 455.00 MPN/100mL | 400.00 | +14% | Oct 2017 | Open |
| Oxygen demand, ultimate | DMR, Limited - Numeric Violation | 51.00 mg/L | 50.40 | +1% | Jul 2017 | Open |
| Nitrogen, ammonia, total [as NH3] | DMR, Limited - Numeric Violation | 6.18 mg/L | 4.10 | +51% | Jul 2017 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 445.00 MPN/100mL | 400.00 | +11% | Oct 2016 | Open |
| Nitrogen, ammonia, total [as NH3] | DMR, Limited - Numeric Violation | 11.70 mg/L | 4.10 | +185% | Oct 2016 | Resolved |
| Oxygen demand, ultimate | DMR, Limited - Numeric Violation | 60.00 mg/L | 50.40 | +19% | Oct 2016 | Open |
| Oxygen demand, ultimate | DMR, Limited - Numeric Violation | 73.50 mg/L | 50.40 | +46% | Sep 2016 | Open |
| Nitrogen, ammonia, total [as NH3] | DMR, Limited - Numeric Violation | 10.60 mg/L | 4.10 | +159% | Sep 2016 | Resolved |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 525.00 MPN/100mL | 400.00 | +31% | Sep 2015 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 50.00 mg/L | 45.00 | +11% | Feb 2015 | Open |
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.
CWA 309G2B AO For Class II Penalties
Clean Water Act
· Case 02-1995-N034
Administrative - Formal
· Case 02-2021-3007 · Feb 18, 2021
State Administrative Order of Consent
Clean Water Act
· Case NY-N00002208 · Jun 7, 2002
$20,000
State Administrative Order of Consent
Clean Water Act
· Case NY-N00001990 · Nov 21, 1997
$1,200
State Administrative Order of Consent
Clean Water Act
· Case NY-N00002045 · Nov 3, 1997
$1,200
CWA 309A AO For Compliance
Clean Water Act
· Case 02-1995-N035 · Mar 30, 1995
CWA 309A AO For Compliance
Clean Water Act
· Case 02-1994-N070 · Sep 21, 1994
State CWA Non Penalty AO
Clean Water Act
· Case NY-N00000800 · Jan 3, 1987
State CWA Non Penalty AO
Clean Water Act
· Case NY-N00000585 · Jan 2, 1987
State CWA Non Penalty AO
Clean Water Act
· Case NY-N00001198 · May 16, 1985
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