Is London, Ohio tap water safe?
3 water systems report serving London. Your water depends on which one serves your address. Check your bill if unsure. This list is matched from the ZIP codes in this place, so it may include nearby systems.
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Mid-Ohio WSD - Chrisman Avenue WTP
Serves 10,256 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 5 monitoring/reporting violations; 1 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
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Mid-Ohio WSD - Old Springfield Road WTP
Serves 5,176 people · Groundwater · Full report →
No health-based violations in the last 5 years; 2 monitoring/reporting violations; 1 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
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Choctaw Utilities, Inc.
Serves 2,200 people · Groundwater · Full report →
No health-based violations in the last 5 years; 4 monitoring/reporting violations; 1 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).