LEWISTOWN CITY OF
PWSID: MT0000271 · LEWISTOWN, MT · Serving 5,923 people
Type: CWSOwner: LSource: GW
Compliant
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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N/A ppt
Highest single detection
2025-08-18
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 58 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| PFPeA | ND | — | Below MRL | 2025-02-18 |
| 6:2 FTS | ND | — | Below MRL | 2025-02-18 |
| PFBA | ND | — | Below MRL | 2025-02-18 |
| 4:2 FTS | ND | — | Below MRL | 2025-02-18 |
| 8:2 FTS | ND | — | Below MRL | 2025-02-18 |
Violation history(7 violations, all resolved)
Monitoring & Reporting - PFOA(PFOA)
2014-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFOS(PFOS)
2014-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFHxS(PFHxS)
2014-01-01 · Resolved · Tier 3
Monitoring & Reporting - HFPO-DA (GenX)(HFPO-DA (GenX))
2014-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFNA(PFNA)
2014-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFBS(PFBS)
2014-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFHxA
Violation details
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