Is Lewistown, Montana tap water safe?
5 water systems report serving Lewistown. Your water depends on which one serves your address. Check your bill if unsure.
A
City of Lewistown
Serves 5,923 people · Groundwater · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
A
Mountain Acres Mb Hm Pk
Serves 320 people · Groundwater · Full report →
No health-based violations in the last 5 years; 3 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
D
King Ranch Colony
Serves 56 people · Groundwater · Full report →
19 health-based violations in the last 5 years; 7 monitoring/reporting violations; 2 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2024).
A
Deerfield Hutterite Colony
Serves 51 people · Groundwater · Full report →
No health-based violations in the last 5 years; 3 monitoring/reporting violations; 1 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2021).
A
Spring Creek Colony Lewistown
Serves 48 people · Groundwater · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; No UCMR 5 PFAS results on file; Latest lead 90th percentile on file is from 2019 (older than 5 years, not graded).