JOHNSTON MUNICIPAL WATER SUPPLY
PWSID: IA7740011 · JOHNSTON, IA · Serving 24,064 people
Type: CWSOwner: LSource: SW
Settlement eligible
Settlement details
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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
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Upgrade to ProDetection summary
33 ppt
Highest single detection
2025-09-15
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 232 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| 6:2 FTS | ND | — | Below MRL | 2025-01-06 |
| 4:2 FTS | ND | — | Below MRL | 2025-01-06 |
| 8:2 FTS | ND | — | Below MRL | 2025-01-06 |
| PFMPA | ND | — | Below MRL | 2025-01-06 |
| PFPeA | ND | — | Below MRL | 2025-01-06 |