PORTSMOUTH WATER WORKS

PWSID: NH1951010 · PORTSMOUTH, NH · Serving 33,000 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.

PFOA7 ppt(MCL: 4 ppt)

PFOS5 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

10 ppt

Highest single detection

Highest detection

Pro feature

2023-07-18

Latest sample date

complete

Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5) · 522 compounds tested

Contaminant	Result (ppt)	MCL (ppt)	Status	Sample date
11Cl-PF3OUdS	ND	—	Below MRL	2024-01-19
HFPO-DA	ND	10	Below MRL	2023-07-18

520 more results hidden