Is Claremont, California tap water safe?
3 water systems report serving Claremont. 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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Gswc - Claremont
Serves 39,776 people · Surface water · Full report →
No health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).
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Three Valleys MWD
Population not reported (often a wholesaler) · Surface water · Full report →
No health-based violations in the last 5 years; No UCMR 5 PFAS results on file.
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West End Consolidated Water Company
Population not reported (often a wholesaler) · Groundwater · Full report →
No health-based violations in the last 5 years; No UCMR 5 PFAS results on file.