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Granite Dells Water Company

EPA monitoring tested this supplier for 72 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

72
contaminants tested
14
detected
50
people served
2
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Private
Counties served
Yavapai

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.

2
health-based violations
28
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1983-03-30 → 1983-07-29
MCL Health-based Archived 1980-01-25 → 1980-03-24
MR Monitoring Resolved 2026-01-01
MR Monitoring Resolved 2026-01-01
Other Monitoring Resolved 2025-10-02
Other Monitoring Resolved 2025-10-02
Other Monitoring Resolved 2024-10-02
Other Monitoring Resolved 2024-10-02
Other Monitoring Resolved 2022-10-02
Other Monitoring Resolved 2022-10-02

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
261 µg/L 20%
of the EPA limit 1300 µg/L
worst single sample: 270 µg/L
19/20 SYR4 2013–2018
Nitrate
2900 µg/L 29%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0100 mg/L 67%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Lead
14.25 µg/L 95%
of the EPA limit 15 µg/L
worst single sample: 18.8 µg/L
11/20 SYR4 2013–2018
TTHM
16.8 µg/L 21%
of the EPA limit 80 µg/L
worst single sample: 17.9 µg/L
3/3 SYR4 2014–2017
Beryllium, Total
2.595 µg/L 65%
of the EPA limit 4 µg/L
worst single sample: 2.6 µg/L
2/2 SYR4 2014–2017
Combined Radium (-226 And -228)
1.37 pCi/L 27%
of the EPA limit 5 pCi/L
worst single sample: 1.4 pCi/L
2/2 SYR4 2014–2017
Combined Uranium
11.845 µg/L 39%
of the EPA limit 30 µg/L
worst single sample: 12 µg/L
2/2 SYR4 2014–2017
Fluoride
2000 µg/L 50%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2017
Gross Alpha, Excl. Radon And U
6.695 pCi/L 45%
of the EPA limit 15 pCi/L
worst single sample: 6.8 pCi/L
2/2 SYR4 2014–2017
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/2 SYR4 2014–2017
Barium
24 µg/L 1.2%
of the EPA limit 2000 µg/L
 1/2 SYR4 2014–2017
Nitrate-Nitrite
2300 µg/L 23%
of the EPA limit 10000 µg/L
 1/1 SYR4 2014
Total Haloacetic Acids (HAA5)
2 µg/L 3.3%
of the EPA limit 60 µg/L
 1/3 SYR4 2014–2017
58 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HORSLEY, RICK
Phone
928-778-3081
Email
[email protected]

Frequently asked questions about Granite Dells Water Company

Is Granite Dells Water Company tap water safe to drink?

EPA monitoring detected 14 contaminants in Granite Dells Water Company'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 Granite Dells Water Company's water?

EPA monitoring detected Copper, Nitrate, Lead, Lead, TTHM, and others. The full list with the level and data source for each is above.

How many people does Granite Dells Water Company serve?

Granite Dells Water Company reports serving 50 people in Arizona, per its EPA record.

Has Granite Dells Water Company had any water quality violations?

The EPA has 28 violations on file for Granite Dells Water Company, of which 2 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.