Phoenix Water Quality 2026
Reviewed by Joe Letorney, 30-year water treatment expert · Former WQA Certified Water Treatment Specialist (CWS), Level VI
Phoenix Water Services · Colorado River / Salt River Project · 2024–2026 data
Source: Phoenix Water CCR 2024 · EPA SDWIS · EPA UCMR5 · EWG Tap Water Database
Phoenix water has chromium-6 above California health goals, significant PFAS from Luke Air Force Base contamination, high arsenic, and extremely hard water from the Colorado River. A reverse osmosis filter is strongly recommended.
WaterCheckup Safety Score — an independent index from EPA public data and our formula. Not your utility’s official water quality rating, an EPA compliance grade, or a test of water at your tap. How we score →
Phoenix relies heavily on the Colorado River, delivered via the Central Arizona Project canal — an open-air system that picks up agricultural runoff, sediment, and other contaminants along its 336-mile route before reaching treatment plants. The city also draws from Salt River Project reservoirs and local groundwater, creating a blended supply that varies by season.
Desert cities fight two battles at once: high TDS/hardness from mineral-rich groundwater and imported surface water, plus emerging contaminants like PFAS that carbon alone may not handle at low parts-per-trillion levels. Phoenix residents often notice white scale on fixtures before they notice any health concern — that scale is calcium carbonate, and it is harmless to drink but expensive for appliances.
Chromium-6 has been debated in Arizona the same way as California. If your report shows elevated chromium-6 relative to health guidelines, reverse osmosis is the residential technology with the clearest removal data. Pair RO with a softener only if hardness is damaging fixtures; otherwise you may be over-buying equipment.
See best water filters for lead removal and what filters remove PFAS.
Phoenixwater may meet federal EPA limits while still showing contaminants above independent health guidelines (EWG, state advisories). EPA MCLs are often set on treatment feasibility — not a "zero risk" threshold. Compare levels below to health guidelines and state/U.S. utility averages, then see which filter technologies address your profile.
EPA UCMR5 PFAS plus utility/EWG averages with national and state benchmarks. Run a ZIP report for SDWIS samples at your address.
From Phoenix Water Services CCR 2024
Removes with: RO · Ion exchange
Can impair thyroid function — most concerning during pregnancy and childhood.
Removes with: RO · Carbon
Can cause anemia and nervous system effects in infants and young children at high levels.
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 23.44 ppb · AZ utility avg: 122.83 ppb
Removes with: RO · Carbon
EWG health guideline: 0.15 ppb
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 30.97 ppb · AZ utility avg: 35.56 ppb
Removes with: RO · Carbon
EWG health guideline: 700 ppb
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 43.45 ppb · AZ utility avg: 55.27 ppb
Removes with: RO · Carbon · Ion exchange
EWG health guideline: 100 ppb
Long-term exposure at high levels may affect the nervous system. Staining and taste issues at lower levels.
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 23.64 ppb · AZ utility avg: 21.93 ppb
Removes with: RO · Carbon
PFAS (“forever chemicals”) persist in the body. NSF 58 reverse osmosis or NSF P473-certified filters remove PFAS at the tap — standard pitchers do not.
Removes with: RO · Carbon
EWG health guideline: 0.06 ppb (HAA5)
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 21.57 ppb · AZ utility avg: 8.82 ppb
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 2.10 ppb · AZ utility avg: 9.40 ppb
Removes with: RO · Carbon
PFAS (“forever chemicals”) persist in the body. NSF 58 reverse osmosis or NSF P473-certified filters remove PFAS at the tap — standard pitchers do not.
Removes with: RO · Carbon
EWG health guideline: 0.004 ppb
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 1.52 ppb · AZ utility avg: 4.03 ppb
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 2.35 ppb · AZ utility avg: 2.63 ppb
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 1.89 ppt · AZ utility avg: 5.04 ppt
Removes with: RO
EWG health guideline: 0.14 ppm
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 1.10 ppm · AZ utility avg: 2.84 ppm
Removes with: RO
Radioactive — long-term exposure increases kidney toxicity and cancer risk.
Removes with: RO · Ion exchange
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 0.60 ppb · AZ utility avg: 0.84 ppb
Removes with: RO · Carbon
U.S. and state averages from EWG Tap Water Atlas utilities in our database. For your exact tap, use a ZIP report — home plumbing can differ from utility averages.
Reference matrix — not specific brands. NSF-certified carbon blocks, reverse osmosis (NSF 58), and ion-exchange softeners address different contaminants. Product picks below match this profile.
Phoenixutility data is a strong baseline — but lead often comes from your home's pipes, and PFAS can vary by neighborhood. Choose certified lab testing for certainty, or skip straight to NSF-certified filters matched to this profile.
SimpleLab Tap Score mail-in panels test PFAS, lead, nitrates, bacteria, and 100+ contaminants at your kitchen tap. Results in about a week — then pick filtration with real numbers, not guesses.
Tap Score City Test — from $89 →Accredited labs · Best if you have old plumbing, pregnancy, or want proof before installing RO
Get NSF 58 / NSF 53 picks matched to Phoenix's PFAS, lead, and disinfection byproduct profile — reviewed by a 30-year water treatment expert.
Take the 3-question filter quiz →Best when contaminants are already flagged above and you want the right RO or pitcher today
FREQUENTLY ASKED QUESTIONS
Is Phoenix, AZ tap water safe to drink?
Phoenix water meets all EPA and Arizona state drinking water standards. That said, independent analysis has flagged naturally occurring arsenic and chromium-6 (hexavalent chromium) at levels well above health-guideline thresholds set by groups like EWG, even though both remain within current legal limits — chromium-6 in particular has no federal enforceable limit yet.
Where does Phoenix get its water?
About 90-98% of Phoenix's water is surface water from the Salt and Verde Rivers (delivered via the Salt River Project) and the Colorado River (delivered via the Central Arizona Project). The remainder comes from local groundwater wells, with Lake Pleasant used to store Colorado River water before treatment.
Does Phoenix have arsenic in its water?
Yes — arsenic is naturally occurring in the desert geology of the region, and independent testing has found levels significantly above health-guideline thresholds (though within EPA's legal limit). Phoenix's aquifers have also historically been affected by Superfund sites with industrial contamination, adding to arsenic and chromium concerns in some groundwater sources.
Does Phoenix have hard water?
Yes, Phoenix water is hard, picking up calcium and magnesium as it moves through the desert's rock, soil, and river systems. A water softener is commonly used by Phoenix households to reduce scale buildup, along with a separate drinking-water filter for taste and contaminant reduction, since softeners don't remove things like arsenic or chromium-6.
Is there PFAS in Phoenix's water?
PFAS regulation for Arizona water providers is still ramping up — utilities must test by 2027 and meet new EPA drinking water standards by 2029. Phoenix has allocated funding toward PFAS remediation as part of broader state water investment, so this is an area worth monitoring as more testing data becomes available.
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Reviewed by Joe Letorney, 30-year water treatment expert · Former WQA Certified Water Treatment Specialist (CWS), Level VI
Data sourced from Phoenix Water CCR 2024, EPA SDWIS, EPA UCMR5, and EWG Tap Water Database. Some filter links are affiliate links.