PFAS & Water Quality in Tucson, AZ

Where Tucson's drinking water comes from

Much of the Tucson area has historically leaned on groundwater pumped from the aquifer beneath the basin, and in recent decades the region tends to blend in Colorado River water delivered through the Central Arizona Project. The exact mix varies by neighborhood and year, so think of Tucson's supply as largely a desert-aquifer-plus-imported-river story rather than one single source.

Tucson and its surrounding county aren't served by one tap. Adjacent addresses can sit on entirely different public water systems, so the city-level picture above isn't automatically yours. To find out who serves your address, check a recent water bill or the systems listed above, then look up that utility's annual Consumer Confidence Report, which it publishes free every year. Calling the utility listed is the fastest honest answer when evaluating an address.

Tucson water hardness

Hardness is the dishes-and-water-heater question, not the health one, and we don't publish a number for Tucson because no reliable hardness dataset exists here. Groundwater across much of the desert Southwest tends to run on the harder side, but the only way to know your tap is to check: a cheap test strip, or the hardness figure many utilities tuck into their annual report, will tell you more than guessing at your cloudy drinking glasses.

Reading this when you're evaluating a Tucson address

City-level numbers describe the broad pattern around Tucson; two homes a mile apart can sit on different water systems with very different profiles. The address report fills that gap — it identifies the public water system serving a specific property, lists any PFAS detections on that exact system, and maps the nearby industrial and Superfund sources.