MONTESANO CITY OF

PWSID: WA5356000 · Montesano, WA · Serving 5,492 people

Type: CWSOwner: LSource: GW

Compliant

All PFAS compounds below EPA Maximum Contaminant Levels.

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

Exact contamination levels

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PFAS compounds detected

N/A ppt

Highest single detection

Highest detection

Pro feature

2024-09-20

Latest sample date

partial

Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5) · 116 compounds tested

Contaminant	Result (ppt)	MCL (ppt)	Status	Sample date
11Cl-PF3OUdS	ND	—	Below MRL	2024-03-19
ADONA	ND	—	Below MRL	2024-03-19

114 more results hidden