Billerica Wastewater Treatment Facility
70 Letchworth Avenue, Billerica, MA 01862 · Middlesex County · Publicly Owned Treatment Works
- Average flow
- 3.3 MGD
- Design flow
- 5.5 MGD
- NPDES permit
- MA0101711
- Effective
- Permit expires
- February 2029
- Population served
- 35,443
- CWNS 2022
Billerica Wastewater Treatment Facility is a publicly owned wastewater treatment works in Billerica, Middlesex County, Massachusetts treating an average of 3.3 million gallons per day against a permitted design capacity of 5.5 MGD, serving about 35,443 residents. It discharges under NPDES permit MA0101711 (effective), which expires in February 2029, with 51 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in January 2024.
Treatment technology
13 treatment structures and unit processes identified at Billerica Wastewater Treatment Facility.
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See the full treatment train at Billerica Wastewater Treatment Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 51
- Effluent violations
- 20
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 Billerica Wastewater Treatment Facility in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $10,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jan 2024
BILLERICA WWTP
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $10,000
EPA's description of the case:
“On July 16, 2019, EPA issued a Clean Water Act Administrative Order (Order) to the Town of Billerica, Massachusetts for violating the total aluminum limits contained in its National Pollutant…”
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Source: EPA ECHO, civil enforcement case 01-2019-2040.
Full case history with a free Klarifi account
Every action against Billerica Wastewater Treatment Facility with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
17 verified contacts for Billerica Wastewater Treatment Facility, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Billerica Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Concord · 9 mi away
0.83 MGD
Wayland · 17 mi away
0.03 MGD
Hudson · 19 mi away
1.33 MGD
Marlborough · 20 mi away
2.77 MGD
Salem · 21 mi away
21.66 MGD
Merrimac · 22 mi away
0.36 MGD
Ipswich · 24 mi away
0.66 MGD
Winthrop · 24 mi away
270.96 MGD
Billerica Wastewater Treatment 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 · Ozonation · Activated sludge · all terms