KnowYourWellWater

Check Your Well Water

Well Water Quality by State

Well water is local. Each state page summarizes documented regional conditions, recommended tests and the official agencies to consult — citing EPA, USGS, CDC and state sources. We don’t invent county- or ZIP-level data.

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AlabamaDocumented guidance AlaskaDocumented guidance ArizonaDocumented guidance ArkansasDocumented guidance CaliforniaDocumented guidance ColoradoDocumented guidance ConnecticutDocumented guidance DelawareDocumented guidance FloridaDocumented guidance GeorgiaDocumented guidance HawaiiDocumented guidance IdahoDocumented guidance IllinoisDocumented guidance IndianaDocumented guidance IowaDocumented guidance KansasDocumented guidance KentuckyDocumented guidance LouisianaDocumented guidance MaineDocumented guidance MarylandDocumented guidance MassachusettsDocumented guidance MichiganDocumented guidance MinnesotaDocumented guidance MississippiDocumented guidance MissouriDocumented guidance MontanaDocumented guidance NebraskaDocumented guidance NevadaDocumented guidance New HampshireDocumented guidance New JerseyDocumented guidance New MexicoDocumented guidance New YorkDocumented guidance North CarolinaDocumented guidance North DakotaDocumented guidance OhioDocumented guidance OklahomaDocumented guidance OregonDocumented guidance PennsylvaniaDocumented guidance Rhode IslandDocumented guidance South CarolinaDocumented guidance South DakotaDocumented guidance TennesseeDocumented guidance TexasDocumented guidance UtahDocumented guidance VermontDocumented guidance VirginiaDocumented guidance WashingtonDocumented guidance West VirginiaDocumented guidance WisconsinDocumented guidance WyomingDocumented guidance

Private wells and regulation

Private wells are generally not covered by the federal Safe Drinking Water Act, though state and local requirements may apply. Public-system limits (like EPA MCLs) are useful reference points, not automatic legal limits for your well.