Westborough Wastewater Treatment Plant
7 Meadow Road, Westborough, MA 01581 · Worcester County · Publicly Owned Treatment Works
- Average flow
- 4.86 MGD
- Design flow
- 7.7 MGD
- NPDES permit
- MA0100412
- Effective
- Permit expires
- April 2027
- Population served
- 51,131
- CWNS 2022
Westborough Wastewater Treatment Plant is a publicly owned wastewater treatment works in Westborough, Worcester County, Massachusetts treating an average of 4.86 million gallons per day against a permitted design capacity of 7.7 MGD, serving about 51,131 residents. It discharges under NPDES permit MA0100412 (effective), which expires in April 2027, with 2 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in September 2006.
Treatment technology
15 treatment structures and unit processes identified at Westborough Wastewater Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Westborough Wastewater Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
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 Westborough Wastewater Treatment Plant in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Compliance actions
- $6,000
- required by EPA orders
- EPA inspections
- 1
- latest Apr 2005
Latest case · Sep 2006
WESTBOROUGH WASTEWATER TREATMENT BOARD
Administrative order · CWA, Effluent Limitations - NPDES Toxic & Pretreatment Effluent Standards · Final Order Issued · Compliance actions $3,000
Source: EPA ECHO, civil enforcement case 01-2006-2227.
Full case history with a free Klarifi account
Every action against Westborough Wastewater Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Westborough
Westborough's capital improvement plan lists 12 water, sewer and wastewater line items worth $19M starting 2026–2028. The largest budgeted items are shown here.
All water and sewer capital projects in Westborough →
| Project | Budget | Years |
|---|---|---|
| Sewer Pump Station Improvements | $7,700,000 | 2026–2030 |
| Sewer Line Analysis | $3,060,000 | 2026–2028 |
| Water Main Replacement | $2,850,000 | 2027–2030 |
| Well and Booster Station Improvements | $1,800,000 | 2026–2030 |
| Water Tower Maintenance | $1,200,000 | 2027–2029 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
3 verified contacts for Westborough Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Westborough Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Marlborough · 4 mi away
1.58 MGD
Marlborough · 9 mi away
2.77 MGD
Millbury · 9 mi away
30.02 MGD
Hudson · 10 mi away
1.33 MGD
East Douglas · 14 mi away
0.15 MGD
Leicester · 15 mi away
0.13 MGD
North Oxford · 15 mi away
0.26 MGD
Wayland · 15 mi away
0.03 MGD
Westborough Wastewater Treatment Plant: 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 March 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms