Holyoke Water Pollution Control Facility
1 Berkshire St, Holyoke, MA 01040 · Hampden County · Publicly Owned Treatment Works
- Average flow
- 6.07 MGD
- Design flow
- —
- NPDES permit
- MAL101630
- Effective
- Permit expires
- December 2030
- Population served
- 34,070
- CWNS 2022
Holyoke Water Pollution Control Facility is a publicly owned wastewater treatment works in Holyoke, Hampden County, Massachusetts treating an average of 6.07 million gallons per day, serving about 34,070 residents. It discharges under NPDES permit MAL101630 (effective), which expires in December 2030, with 4 recorded violations in the last three years. EPA has recorded 9 formal enforcement actions naming the plant, the latest in August 2023.
Treatment technology
15 treatment structures and unit processes identified at Holyoke Water Pollution Control Facility.
Available with a free Klarifi account
See the full treatment train at Holyoke Water Pollution Control Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Holyoke Water Pollution Control Facility in EPA's ICIS system.
- Formal actions
- 9
- 0 since FY2020
- Penalties assessed
- $113,000
- all cases
- Compliance actions
- $72M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Aug 2023
CITY OF HOLYOKE
Judicial case · CWA, NPDES Permit Violations · Final Order Entered · Penalty $50,000 · Compliance actions $30M
EPA's description of the case:
“On March 23, 2023, the Department of Justice lodged a consent decree in federal court that will resolve violations of the Clean Water Act and corresponding Massachusetts laws by the City of Holyoke,…”
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Source: EPA ECHO, civil enforcement case 01-2016-2036.
Full case history with a free Klarifi account
Every action against Holyoke Water Pollution Control Facility with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for Holyoke Water Pollution Control Facility, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Holyoke Water Pollution Control Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Westfield · 8 mi away
2.95 MGD
Northampton · 8 mi away
4.21 MGD
Hadley · 10 mi away
0.32 MGD
Woronoco Village · 11 mi away
0.0045 MGD
Russell · 12 mi away
0.06 MGD
Palmer (three Rivers) · 13 mi away
1.37 MGD
Huntington · 14 mi away
0.03 MGD
Hadley · 14 mi away
3.36 MGD
Holyoke Water Pollution Control Facility: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated May 19, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms