Water quality · Nevada
Water quality in Nevada
Water quality (EPA SDWIS) data for ZIP codes in Nevada. Pick a ZIP below to dive into the water quality summary.
Last verified 2026-05-13 · methodology
What lands here
Pages show the CWS serving the address, any health-based violations in the last 3 years, most recent lead and copper sampling result, and a link to the primary SDWIS record.
Source & refresh
EPA SDWIS. Refreshed quarterly (federal mandate). Primary source →
Nevada top concern
Wildfire, water-supply (Colorado River allotment)
Nevada's wildfire risk concentrates in the western Sierra foothills (Reno, Carson City, Lake Tahoe). Las Vegas water supply tied to declining Lake Mead Colorado River allotment. EPA SDWIS shows arsenic challenges in some rural systems.
See Nevada state page for the full state-level rollup across all 12 dimensions.
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Lead and Copper Rule 2024 — the federal lead-pipe inventory mandate
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