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Tap water quality report

Holbrook City of

EPA monitoring tested this supplier for 101 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

101
contaminants tested
10
detected
4,833
people served
4
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Local government
Counties served
Navajo

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.

4
health-based violations
203
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2023-07-09
TT Health-based Resolved 2023-07-09
MCL Health-based Resolved 2008-03-01 → 2008-03-31
MCL Health-based Resolved 2005-07-01 → 2005-07-31
MR Monitoring Unaddressed 2026-01-01
MR Monitoring Archived 2025-10-01 → 2025-10-31
MR Monitoring Archived 2025-10-01 → 2025-10-31
RPT Monitoring Unaddressed 2025-07-02
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01

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
140 µg/L 11%
of the EPA limit 1300 µg/L
worst single sample: 520 µg/L
74/80 SYR4 2013–2019
Lead
9.24 µg/L 62%
of the EPA limit 15 µg/L
worst single sample: 13 µg/L
37/80 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
TTHM
8.625 µg/L 11%
of the EPA limit 80 µg/L
worst single sample: 8.8 µg/L
6/6 SYR4 2012–2019
Lithium
18 µg/L
No EPA limit set
 6/6 UCMR-5 2025
Total Haloacetic Acids (HAA5)
1.84 µg/L 3.1%
of the EPA limit 60 µg/L
worst single sample: 1.9 µg/L
5/6 SYR4 2012–2019
Barium
23.4 µg/L 1.2%
of the EPA limit 2000 µg/L
worst single sample: 24 µg/L
4/4 SYR4 2012–2018
Fluoride
417 µg/L 10%
of the EPA limit 4000 µg/L
worst single sample: 420 µg/L
4/4 SYR4 2012–2018
2,4-D
2.1 µg/L 3%
of the EPA limit 70 µg/L
 1/20 SYR4 2014–2019
Combined Radium (-226 And -228)
1.6 pCi/L 32%
of the EPA limit 5 pCi/L
 1/2 SYR4 2015–2018
91 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-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitrateNitrate-NitriteNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HOLBROOK CITY OF
Phone
928-524-6225
Email
rsullivan@holbrookaz.gov

Frequently asked questions about Holbrook City of

Is Holbrook City of tap water safe to drink?

EPA monitoring detected 10 contaminants in Holbrook 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 Holbrook City of's water?

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

How many people does Holbrook City of serve?

Holbrook City of reports serving 4,833 people in Arizona, per its EPA record.

Has Holbrook City of had any water quality violations?

The EPA has 203 violations on file for Holbrook City of, of which 4 are health-based (a contaminant limit or required treatment was breached) and 2 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.