Scottsdale City of Water Quality (Arizona) – 2025 Report Results

We read 27 results from Scottsdale City of’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.

Serves about 241,361 people · Water system ID AZ0407098 · Read the district’s 2025 report (opens in a new tab)

Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.

Results from the 2025 report

Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.

Contaminant	Result	Health goal	Legal limit	What it means
Arsenichighest running annual average · range 1.2 to 6.3 · Entry points · 2025 report, page 6	5.8 ppb	0.004 ppb	10 ppb	Above the health goal1,450x the health goal
Gross alpha (radioactivity)system-wide average · range ND to 2.3 · Entry points · 2025 report, page 6	0.5 pCi/L	0 pCi/L	15 pCi/L	Above the health goalThe health goal is zero
Lead90th percentile of 50 homes tested, 1 over the action level · sampled 2023 · Customer taps (50 homes) · 2025 report, page 6	2 ppb	0.2 ppb	15 ppb (action level)	Above the health goal10x the health goal
Total dissolved solidshighest measured · range 325 to 710 · Entry points · 2025 report, page 7	710 ppm	—	500 ppm guideline	Above the guideline1.4x the guideline (taste, odor or stains; not a health limit)
Uraniumsystem-wide average · range ND to 14 · Entry points · 2025 report, page 6	4.2 ppb	0.6 ppb	30 ppb	Above the health goal7x the health goal
Bariumsystem-wide average · range 0.04 to 0.13 · printed as 85 ppb · Entry points · 2025 report, page 6	0.09 ppm	2 ppm	2 ppm	Below the health goal
Chloridehighest measured · range ND to 105 · Entry points · 2025 report, page 7	105 ppm	—	250 ppm guideline	Within the guideline
Chlorineaverage · range ND to 1.4 · Distribution system · 2025 report, page 6	0.64 ppm	None set	4 ppm	Below the legal limit
Chromium (total)system-wide average · range ND to 25.7 · Entry points · 2025 report, page 6	4.1 ppb	None set	100 ppb	Below the legal limit
Copper90th percentile of 50 homes tested, 0 over the action level · printed as 170 ppb · sampled 2023 · Customer taps (50 homes) · 2025 report, page 6	0.17 ppm	0.3 ppm	1.3 ppm (action level)	Below the health goal
Disinfection byproducts (HAA5)highest running annual average · range 2.5 to 9.5 · Distribution system · 2025 report, page 6	9.1 ppb	None set	60 ppb	Below the legal limit
Disinfection byproducts (TTHM)highest running annual average · range 26.7 to 61.3 · Distribution system · 2025 report, page 6	52.7 ppb	None set	80 ppb	Below the legal limit
Fluoridesystem-wide average · range ND to 0.5 · Entry points · 2025 report, page 6	0.3 ppm	1 ppm	4 ppm	Below the health goal
Nitrate (as N)highest running annual average · range ND to 6.4 · Entry points · 2025 report, page 6	4 ppm	10 ppm	10 ppm	Below the health goal
pHhighest measured · range 6.7 to 8.2 · Entry points · 2025 report, page 7	8.2	—	—	Normal range
Seleniumsystem-wide average · range 1.1 to 2.4 · Entry points · 2025 report, page 6	1.9 ppb	30 ppb	50 ppb	Below the health goal
Sulfatehighest measured · range ND to 225 · Entry points · 2025 report, page 7	225 ppm	—	250 ppm guideline	Within the guideline
Total coliform bacteriahighest month · Distribution system · 2025 report, page 6	Not detected	0 % positive	5 % positive	Not detected
Turbidity (cloudiness)highest measured · Treatment plants · 2025 report, page 6	0.43 NTU	None set	1 NTU	Below the legal limit
Alkalinityhighest measured · range 113 to 135 · Entry points · 2025 report, page 7	135 ppm	None set	None	No health limit
Calciumhighest measured · range 61.9 to 81.3 · Entry points · 2025 report, page 7	81.3 ppm	None set	None	No health limit
Lithiumaverage · range 43.5 to 90.4 · Entry points · 2025 report, page 7	54.5 ppb	None set	None	No health limit
Magnesiumhighest measured · range 27 to 42 · Entry points · 2025 report, page 7	42 ppm	None set	None	No health limit
Nickelsystem-wide average · range ND to 4.5 · Entry points · 2025 report, page 6	Not detected	None set	None	No health limit
PFBS (a PFAS)highest measured · range ND to 3.2 · printed as 0.0032 ppb · Entry points · 2025 report, page 7	3.2 ppt	None set	None	No health limit
Sodiumhighest measured · range 48 to 140 · Entry points · 2025 report, page 7	140 ppm	None set	None	No health limit
Total organic carbonsystem-wide average · range 1.4 to 2.3 · Entry points · 2025 report, page 6	1.6 ppm	None set	None	No health limit

Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.

EPA testing for PFAS and lithium

EPA’s own nationwide testing (UCMR 5) found these in Scottsdale City of’s water between Jan 2025 and Dec 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.

PFBS3.2 pptFound in 1 of 18 samples · highest resultNo federal limit in force for this one
Lithium90.4 ppbFound in 18 of 18 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)

Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.

What you can do

Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.