CASTLE ROCK TOWN OF
PWSID: CO0118010 · CASTLE ROCK, CO · Serving 106,822 people
Type: CWSOwner: LSource: SW
Settlement eligible
Settlement details
Upgrade to Pro to view eligibility details and access the claims portal.
Upgrade to ProCompliant
All PFAS compounds below EPA Maximum Contaminant Levels.
Key contaminants vs MCL
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.
Upgrade to ProDetection summary
25 ppt
Highest single detection
2024-08-07
Latest sample date
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 |
| 9Cl-PF3ONS | ND | — | Below MRL | 2023-06-28 |
| NMeFOSAA | ND | — | Below MRL | 2023-06-28 |
| PFUnA | ND | — | Below MRL | 2023-06-28 |