WELLESLEY WATER DIVISION

PWSID: MA3317000 · WELLESLEY, MA · Serving 29,550 people

Type: CWSOwner: LSource: SW

Settlement eligible

May qualify for 3M/DuPont settlement funds

Exceeds MCL

One or more PFAS compounds exceed EPA Maximum Contaminant Levels. Corrective action required by 2031.

PFOA6.3 ppt(MCL: 4 ppt)

PFOS6.6 ppt(MCL: 4 ppt)

EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31

Exact contamination levels

Upgrade to Pro to see PFOA/PFOS ppt values and MCL comparison charts.

PFAS compounds detected

6.6 ppt

Highest single detection

Highest detection

Pro feature

2025-07-23

Latest sample date

complete

Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5) · 290 compounds tested

Contaminant	Result (ppt)	MCL (ppt)	Status	Sample date
PFBS	ND	—	Below MRL	2025-10-01
NEtFOSAA	ND	—	Below MRL	2025-01-21

288 more results hidden