AirWaterScore
Rankings
Every US state and county ranked by air and water quality, from the same EPA records as the lookup tools — drill down from a state or national rank to the counties behind it.
Every US state and territory with an EPA air monitor, ranked by a population-weighted air score, drilling down to the monitored counties behind each rank.
Open tool →Worst Water Violations by StateEvery US state and territory with an active public water system, ranked worst-first by a pooled drinking-water compliance score built from EPA SDWIS/ECHO violation records, drilling down to the counties behind each rank.
Open tool →Best & Worst Counties for Air and Water QualityEvery US county with both an EPA air monitor and an active water system, ranked by composite score — the top 100 best and worst in the country, each with a representative ZIP.
Open tool →Cleanest Drinking Water by StateEvery US state and territory with an active public water system, ranked best-first by the same pooled drinking-water compliance score as the worst-water ranking.
Open tool →