Is Desert Hills Water Tap Water Safe? Quality Report

Water source: SWP
Ownership: Private
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

118

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2010-07-01 → 2010-09-30
MCL	Health-based	Resolved	2010-04-01 → 2010-06-30
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2009-10-01 → 2009-12-31
MCL	Health-based	Resolved	2009-07-01 → 2009-09-30
MCL	Health-based	Resolved	2009-04-01 → 2009-06-30
MCL	Health-based	Resolved	2009-01-01 → 2009-03-31
MCL	Health-based	Resolved	2008-10-01 → 2008-12-31
MCL	Health-based	Resolved	2008-07-01 → 2008-09-30
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31

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
Arsenic	9.325 µg/L 93% of the EPA limit 10 µg/L worst single sample: 10.2 µg/L	60/60	SYR4	2012–2019
TTHM	73.26 µg/L 92% of the EPA limit 80 µg/L worst single sample: 90.1 µg/L	55/56	SYR4	2012–2019
Copper	184.5 µg/L 14% of the EPA limit 1300 µg/L worst single sample: 1100 µg/L	52/71	SYR4	2012–2017
Nitrate	2500 µg/L 25% of the EPA limit 10000 µg/L	52/52	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	24.45 µg/L 41% of the EPA limit 60 µg/L worst single sample: 33.6 µg/L	52/59	SYR4	2012–2019
Lead	8.35 µg/L 56% of the EPA limit 15 µg/L worst single sample: 10 µg/L	26/71	SYR4	2012–2017
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	12/12	LCR	2023
Nitrate-Nitrite	2370 µg/L 24% of the EPA limit 10000 µg/L worst single sample: 2500 µg/L	11/11	SYR4	2012–2017
Bromodichloromethane	27.675 µg/L No EPA limit set worst single sample: 29.6 µg/L	8/8	SYR4	2019
Bromoform	6.02 µg/L No EPA limit set worst single sample: 6.3 µg/L	8/8	SYR4	2019
Chloroform	36.595 µg/L No EPA limit set worst single sample: 40.2 µg/L	8/8	SYR4	2019
Dibromoacetic Acid	3.5 µg/L No EPA limit set	8/8	SYR4	2019
Dibromochloromethane	17.705 µg/L No EPA limit set worst single sample: 18.3 µg/L	8/8	SYR4	2019
Dichloroacetic Acid	13.7 µg/L No EPA limit set worst single sample: 14.4 µg/L	8/8	SYR4	2019
Trichloroacetic Acid	11.615 µg/L No EPA limit set worst single sample: 12 µg/L	8/8	SYR4	2019
Lithium	46.5 µg/L No EPA limit set	6/6	UCMR-5	2023
Barium	61.55 µg/L 3.1% of the EPA limit 2000 µg/L worst single sample: 62 µg/L	4/4	SYR4	2012–2018
Chromium	7.855 µg/L 7.9% of the EPA limit 100 µg/L worst single sample: 7.9 µg/L	4/4	SYR4	2012–2018
Fluoride	318.5 µg/L 8% of the EPA limit 4000 µg/L worst single sample: 320 µg/L	4/4	SYR4	2012–2018
Di(2-ethylhexyl) Phthalate	0.6200 µg/L 10% of the EPA limit 6 µg/L	2/8	SYR4	2012–2018
Monobromoacetic Acid	1.295 µg/L No EPA limit set worst single sample: 1.3 µg/L	2/8	SYR4	2019
Monochloroacetic Acid	2.38 µg/L No EPA limit set worst single sample: 2.4 µg/L	2/8	SYR4	2019

88 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 TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: TOWN OF CAVE CREEK
Phone: 480-479-9341
Email: [email protected]

Frequently asked questions about Desert Hills Water

Is Desert Hills Water tap water safe to drink?

EPA monitoring detected 22 contaminants in Desert Hills Water'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 Desert Hills Water's water?

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

How many people does Desert Hills Water serve?

Desert Hills Water reports serving 4,220 people in Arizona, per its EPA record.

Has Desert Hills Water had any water quality violations?

The EPA has 118 violations on file for Desert Hills Water, of which 13 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.