Is Scottsdale City of Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Maricopa

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

956

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	1999-05-01 → 1999-05-31
MCL	Health-based	Archived	1988-07-01 → 1988-09-30
MCL	Health-based	Archived	1988-01-01 → 1988-03-31
MCL	Health-based	Archived	1988-01-01 → 1988-03-31
MCL	Health-based	Archived	1982-02-26 → 1982-03-25
MCL	Health-based	Archived	1982-02-19 → 1982-03-18
MCL	Health-based	Archived	1982-01-26 → 1982-02-25
MR	Monitoring	Resolved	2025-03-01 → 2025-03-31
MR	Monitoring	Resolved	2025-03-01 → 2025-03-31
MR	Monitoring	Resolved	2025-03-01 → 2025-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFBS	0.0032 µg/L	1/18	2025

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	5725 µg/L 57% of the EPA limit 10000 µg/L worst single sample: 7000 µg/L	276/316	SYR4	2012–2019
TTHM	70.425 µg/L 88% of the EPA limit 80 µg/L worst single sample: 102 µg/L	268/268	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	18.46 µg/L 31% of the EPA limit 60 µg/L worst single sample: 27.6 µg/L	265/268	SYR4	2012–2019
Arsenic	6.8 µg/L 68% of the EPA limit 10 µg/L worst single sample: 9.6 µg/L	203/207	SYR4	2012–2019
Copper	172.75 µg/L 13% of the EPA limit 1300 µg/L worst single sample: 748 µg/L	120/120	SYR4	2014–2017
Barium	132.65 µg/L 6.6% of the EPA limit 2000 µg/L worst single sample: 984 µg/L	48/48	SYR4	2012–2019
Fluoride	500 µg/L 13% of the EPA limit 4000 µg/L worst single sample: 700 µg/L	48/49	SYR4	2012–2019
Selenium	2.7 µg/L 5.4% of the EPA limit 50 µg/L	39/48	SYR4	2012–2019
Nitrate-Nitrite	5105 µg/L 51% of the EPA limit 10000 µg/L worst single sample: 6400 µg/L	38/42	SYR4	2012–2019
Lead	5.965 µg/L 40% of the EPA limit 15 µg/L worst single sample: 7.3 µg/L	32/120	SYR4	2014–2017
Chromium	32.71 µg/L 33% of the EPA limit 100 µg/L worst single sample: 42.4 µg/L	27/48	SYR4	2012–2019
Lithium	90.4 µg/L No EPA limit set	18/18	UCMR-5	2025
Combined Uranium	4.675 µg/L 16% of the EPA limit 30 µg/L worst single sample: 5.2 µg/L	16/18	SYR4	2014–2017
Gross Alpha, Excl. Radon And U	2.58 pCi/L 17% of the EPA limit 15 pCi/L worst single sample: 2.7 pCi/L	13/18	SYR4	2014–2017
Lead	0.0023 mg/L 15% of the EPA limit 0.0150 mg/L	11/11	LCR	2023
Dichloromethane	0.9880 µg/L 20% of the EPA limit 5 µg/L worst single sample: 1 µg/L	4/111	SYR4	2012–2019
Xylenes, Total	2.95 µg/L 0% of the EPA limit 10000 µg/L worst single sample: 3 µg/L	3/111	SYR4	2012–2019
Combined Radium (-226 And -228)	0.7000 pCi/L 14% of the EPA limit 5 pCi/L	1/17	SYR4	2014–2017
Ethylene Dibromide	0.0860 µg/L 172% of the EPA limit, at the 95th percentile of samples — 0.0500 µg/L	1/50	SYR4	2014–2019
Ethylbenzene	0.5500 µg/L 0.1% of the EPA limit 700 µg/L	1/111	SYR4	2012–2019

82 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEndothallEndrinGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BUTLER, SUSAN M
Phone: 480-312-8712
Email: [email protected]

Frequently asked questions about Scottsdale City of

Is Scottsdale City of tap water safe to drink?

EPA monitoring detected 21 contaminants in Scottsdale City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Scottsdale City of's water?

EPA monitoring detected Nitrate, TTHM, Total Haloacetic Acids (HAA5), Arsenic, Copper, and others. The full list with the level and data source for each is above.

How many people does Scottsdale City of serve?

Scottsdale City of reports serving 241,361 people in Arizona, per its EPA record.

Has Scottsdale City of had any water quality violations?

The EPA has 956 violations on file for Scottsdale City of, of which 7 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.