CASTLE ROCK TOWN OF

PWSID: CO0118010 · CASTLE ROCK, CO · Serving 106,822 people

Type: CWSOwner: LSource: SW

Settlement eligible

May qualify for 3M/DuPont settlement funds

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

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

PFAS compounds detected

25 ppt

Highest single detection

Highest detection

Pro feature

2024-08-07

Latest sample date

partial

Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5) · 348 compounds tested

Contaminant	Result (ppt)	MCL (ppt)	Status	Sample date
4:2 FTS	ND	—	Below MRL	2024-02-21
ADONA	ND	—	Below MRL	2023-06-28

346 more results hidden