PWSID
MA3031000
State
Massachusetts
City
BILLERICA
Population served
42,119
Primary source
Surface water
Score history
▼ 17 points — the score moved from 100 to 83 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Aug 2025). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
5.5 ppt
limit 4 ppt
PFPeA
8 ppt
limit —
PFHxA
6.1 ppt
limit —
PFBA
5.5 ppt
limit —
PFBS
3.1 ppt
limit —
Violations & enforcement
2
Violations on record
0
Unaddressed
1
Health-based
20
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Aug 2023. Official EPA record →
Recent enforcement actions
- State action · SOX Aug 2023
- State action · SFL Jul 2023
- State action · SOX May 2023
- State action · SOX Jan 2023
- State action · SOX Jul 2014
- State action · SFJ May 2014
- State action · SFL Jun 2009
- State action · SFR May 2007
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
2 stations · latest Aug 2024
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system MA3031000 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.