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Tap water quality report

Prescott City of

EPA monitoring tested this supplier for 104 contaminants and detected 27. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
27
detected
42,217
people served
4
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Local government
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.

4
health-based violations
604
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-01-03
TT Health-based Resolved 2025-01-03
TT Health-based Resolved 2025-01-03
TT Health-based Resolved 2025-01-03
RPT Monitoring Unaddressed 2025-07-02
MR Monitoring Resolved 2025-04-01 → 2025-06-30
MR Monitoring Resolved 2025-04-01 → 2025-06-30
MR Monitoring Resolved 2025-04-01 → 2025-06-30
MR Monitoring Resolved 2025-04-01 → 2025-06-30
Other Monitoring Resolved 2025-03-25

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0126 µg/L 5/8 2023
Pfpea 0.0149 µg/L 5/8 2023
PFHXS 0.0065 µg/L 4/8 2023
PFBS 0.0075 µg/L 2/8 2023
Pfhpa 0.0036 µg/L 2/8 2023
PFOA 0.0114 µg/L 2/8 2023
PFOS 0.0087 µg/L 2/8 2023

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
78.345 µg/L 6%
of the EPA limit 1300 µg/L
worst single sample: 114 µg/L
100/100 SYR4 2013–2019
Nitrate
1700 µg/L 17%
of the EPA limit 10000 µg/L
worst single sample: 2780 µg/L
92/92 SYR4 2012–2019
Arsenic
9.75 µg/L 98%
of the EPA limit 10 µg/L
worst single sample: 58.9 µg/L
63/76 SYR4 2012–2019
TTHM
11.875 µg/L 15%
of the EPA limit 80 µg/L
worst single sample: 15 µg/L
26/26 SYR4 2012–2019
Combined Uranium
16.58 µg/L 55%
of the EPA limit 30 µg/L
worst single sample: 19.7 µg/L
14/14 SYR4 2016–2019
Nitrate-Nitrite
1694 µg/L 17%
of the EPA limit 10000 µg/L
worst single sample: 1700 µg/L
13/13 SYR4 2012–2018
Chromium
11.317 µg/L 11%
of the EPA limit 100 µg/L
worst single sample: 13 µg/L
12/13 SYR4 2012–2018
Barium
36.1 µg/L 1.8%
of the EPA limit 2000 µg/L
worst single sample: 37.2 µg/L
11/13 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2025
Combined Radium (-226 And -228)
1.2 pCi/L 24%
of the EPA limit 5 pCi/L
 6/21 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
3.5 pCi/L 23%
of the EPA limit 15 pCi/L
worst single sample: 3.9 pCi/L
6/14 SYR4 2016–2019
Lead
18.654 µg/L 124%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 22.6 µg/L
5/100 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
1.944 µg/L 3.2%
of the EPA limit 60 µg/L
worst single sample: 2 µg/L
5/28 SYR4 2012–2019
Lithium
18.9 µg/L
No EPA limit set
 5/8 UCMR-5 2023
Fluoride
1052.15 µg/L 26%
of the EPA limit 4000 µg/L
worst single sample: 1100 µg/L
4/13 SYR4 2012–2018
Trichloroethylene
3.455 µg/L 69%
of the EPA limit 5 µg/L
worst single sample: 3.5 µg/L
4/34 SYR4 2012–2019
Tetrachloroethylene
0.9110 µg/L 18%
of the EPA limit 5 µg/L
worst single sample: 0.9200 µg/L
3/34 SYR4 2012–2019
Thallium, Total
1.643 µg/L 82%
of the EPA limit 2 µg/L
worst single sample: 1.73 µg/L
3/13 SYR4 2012–2018
Selenium
4.88 µg/L 9.8%
of the EPA limit 50 µg/L
worst single sample: 4.98 µg/L
2/13 SYR4 2012–2018
Antimony, Total
2.54 µg/L 42%
of the EPA limit 6 µg/L
 1/13 SYR4 2012–2018
77 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-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GRAHAM, NATHAN
Phone
928-237-0640
Email
[email protected]

Frequently asked questions about Prescott City of

Is Prescott City of tap water safe to drink?

EPA monitoring detected 27 contaminants in Prescott 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 Prescott City of's water?

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

How many people does Prescott City of serve?

Prescott City of reports serving 42,217 people in Arizona, per its EPA record.

Has Prescott City of had any water quality violations?

The EPA has 604 violations on file for Prescott City of, of which 4 are health-based (a contaminant limit or required treatment was breached) and 1 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.