Is Columbia, Maryland tap water safe?
2 water systems report serving Columbia. 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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WSSC Water (Washington Suburban Sanitary Commission)
Serves 1,900,000 people · Surface water · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Latest lead 90th percentile on file is from 2020 (older than 5 years, not graded).
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Howard County D.P.W. Distribution
Serves 286,158 people · Surface water · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Latest lead 90th percentile on file is from 2020 (older than 5 years, not graded).