Non-Compliance
Clean Air Act
Clean Water Act
RCRA
UPPER BLACKSTONE 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
-
50 ROUTE 20
MILLBURY, MA 01527
View on map ↗ - County
- WORCESTER County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221320
- Inspections
- 4 · last Sep 19, 2025
- Total Penalties
- $0 · last Apr 26, 2002
- Registry ID
- 110024373417
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.
0
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
12
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
0
Hazardous Waste (RCRA)
Qtrs Non-Compliant
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 | Schedule Event unachieved and not reported | Dec 31, 2024 | Apr 1, 2025 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jul 31, 2023 | Aug 31, 2023 | Resolved |
| cwa | Schedule Event unachieved and not reported | Sep 30, 2018 | Oct 31, 2018 | Resolved |
| cwa | Schedule Event unachieved and not reported | Feb 1, 2017 | Mar 4, 2017 | Resolved |
| cwa | Schedule Event reported late | Aug 5, 2009 | — | Open |
| cwa | Schedule Event achieved late but reported | Aug 5, 2009 | — | Open |
| cwa | Schedule Event unachieved but reported | Aug 5, 2009 | Jan 16, 2010 | Resolved |
| cwa | Schedule Event unachieved and not reported | Aug 5, 2009 | Jan 16, 2010 | Resolved |
| cwa | Schedule Event achieved late but reported | Feb 19, 2007 | — | Open |
| cwa | Schedule Event reported late | Oct 15, 2006 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 15, 2006 | — | Open |
| cwa | Schedule Event reported late | Aug 1, 2006 | — | Open |
| cwa | Schedule Event unachieved but reported | Aug 1, 2006 | Jan 10, 2008 | Resolved |
| cwa | Schedule Event unachieved and not reported | Aug 1, 2006 | Jan 10, 2008 | Resolved |
| cwa | Schedule Event achieved late but reported | Aug 1, 2006 | — | Open |
| rcra | Standards Applicable to Generators of HW: Manifest Requirements Applicable to Small and Large Quantity Generators | Nov 5, 2004 | Dec 14, 2004 | Resolved |
| cwa | Schedule Event achieved late but reported | Apr 1, 2004 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 1, 2001 | — | Open |
| cwa | Schedule Event unachieved and not reported | Apr 1, 2001 | Mar 28, 2002 | Resolved |
| cwa | Schedule Event achieved late but reported | Jul 1, 1995 | — | Open |
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 |
|---|---|---|---|---|---|---|
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 6.31 mg/L | 6.00 | +5% | Aug 2024 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.01 mg/L | 0.01 | +1% | Jan 2024 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.85 mg/L | 6.00 | +36% | Jan 2024 | Open |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | DMR, Limited - Numeric Violation | 25.00 % | 90.00 | +72% | Dec 2023 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.11 mg/L | 6.00 | +32% | Dec 2023 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 5.20 mg/L | 6.00 | +13% | Aug 2023 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 7.69 mg/L | 4.00 | +92% | Oct 2022 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.96 mg/L | 0.45 | +113% | Oct 2022 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 10.37 mg/L | 4.00 | +159% | Sep 2022 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6.90 mg/L | 2.00 | +245% | Sep 2022 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.94 mg/L | 0.45 | +109% | Sep 2022 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Overdue | 0.94 mg/L | 0.45 | +109% | Sep 2022 | Resolved |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.01 mg/L | 0.01 | +17% | Sep 2022 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 737.75 kg/d | 424.04 | +74% | Sep 2022 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 12.20 mg/L | 6.00 | +103% | Sep 2022 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.53 mg/L | 0.45 | +18% | Aug 2022 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 6.87 mg/L | 6.00 | +15% | Aug 2022 | Resolved |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 5.60 mg/L | 6.00 | +7% | Feb 2022 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 1,429.00 | +99,999% | Feb 2022 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 2.70 mg/L | 6.00 | +55% | Sep 2021 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.90 mg/L | 6.00 | +35% | Aug 2021 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 866.40 MPN/100mL | 400.00 | +117% | Jul 2021 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.00 mg/L | 6.00 | +33% | Jul 2021 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 517.20 MPN/100mL | 400.00 | +29% | Sep 2020 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 5.60 mg/L | 6.00 | +7% | Aug 2020 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.80 mg/L | 6.00 | +37% | Oct 2019 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 739.10 MPN/100mL | 400.00 | +85% | Apr 2019 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 5.40 mg/L | 6.00 | +10% | Apr 2019 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 2.20 mg/L | 0.02 | +10,376% | Jan 2019 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.07 mg/L | 0.02 | +260% | Jan 2019 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.60 mg/L | 6.00 | +40% | Jan 2019 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.00 mg/L | 6.00 | +33% | Sep 2018 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.21 mg/L | 0.02 | +900% | Jul 2018 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 400.00 | +99,999% | Jul 2018 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 2.60 mg/L | 6.00 | +57% | Jul 2018 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 4.30 MPN/100mL | 200.00 | +99,999% | Apr 2018 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 400.00 | +99,999% | Apr 2018 | Open |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.01 mg/L | 0.01 | +22% | Feb 2018 | Open |
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +87% | Jan 2018 | Open |
| Cadmium, total [as Cd] | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +20% | Dec 2017 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 34.80 mg/L | 22.00 | +58% | Oct 2017 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 2.50 mg/L | 6.00 | +58% | Oct 2017 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 1.30 mg/L | 6.00 | +78% | Oct 2016 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 29.00 mg/L | 27.00 | +7% | Aug 2016 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 488.40 MPN/100mL | 400.00 | +22% | Apr 2016 | 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.
Administrative - Formal
· Case 01-2001-0190
Administrative - Formal
· Case 01-2014-2003 · May 1, 2014
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-MAD000212134-001 · Nov 16, 2004
Administrative - Formal
· Case 01-2002-0037 · Apr 26, 2002
$2,000
Administrative - Formal
· Case 01-2002-0171 · Feb 26, 2002
CWA 309A AO For Compliance
Clean Water Act
· Case 01-2002-N003 · Feb 26, 2002
CWA 309A AO For Compliance
Clean Water Act
· Case 01-1994-N012 · Apr 5, 1994
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