Phoenix blends water from the Colorado River, Salt River, and local groundwater – creating some of the hardest municipal water in the country at 200–500 ppm TDS. Beyond hardness, arsenic and other contaminants in some groundwater sources and PFAS contamination near Luke Air Force Base are the main health concerns. A reverse osmosis system handles all three. For taste alone, a carbon pitcher filter helps.
Is Phoenix tap water safe to drink? Phoenix tap water meets EPA drinking water standards. However, some groundwater sources contain arsenic near the 10 ppb federal limit, PFAS from Luke Air Force Base contaminates West Valley groundwater, and the water is extremely hard (200-500 ppm TDS). A reverse osmosis filter addresses all three concerns.
Why is Phoenix water so hard? Phoenix water is hard because all three sources – the Colorado River, the Salt River, and local groundwater – carry high mineral loads. The Colorado River picks up calcium and magnesium as it flows through limestone formations in the desert Southwest. According to the USGS, Phoenix-area water averages 250-500 mg/L hardness, classified as very hard.
Does a Brita filter help with Phoenix water? A Brita filter reduces chlorine taste and lead but does not remove hardness minerals, arsenic, or most PFAS. You'll still get spots on dishes and scale buildup. For Phoenix water, a reverse osmosis system or a ZeroWater pitcher (which removes dissolved solids) is more effective. Brita is the minimum, not the solution.
Does Phoenix water have PFAS? Yes. UCMR5 testing detected PFAS in Phoenix-area water systems. Luke Air Force Base in Glendale is a major source – monitoring wells near the base have shown PFAS levels exceeding 70,000 parts per trillion. West Valley residents are closest to the contamination plume. Check your zip code for specific results.
Is there arsenic in Phoenix water? Some Phoenix-area groundwater sources contain naturally occurring arsenic from volcanic rock formations. According to the Arizona Department of Environmental Quality, arsenic is the most common groundwater contaminant in the state. The City of Phoenix treats for arsenic to meet the federal 10 ppb limit, but smaller systems in the metro have had compliance issues. An RO filter removes arsenic effectively.