Is Prescott Valley, AZ tap water safe?
Supplied by Town of Prescott Valley · serves 57,048 people (23,770 connections) · Groundwater · EPA ID AZ0413048
Data: U.S. EPA · How we read the data · How we check it
Most of Prescott Valley gets its water from Town of Prescott Valley. Parts of the city are served by 3 smaller systems: Mingus West Water System (602 people), Ventura Ranch Dwid Water System (300 people), Mingus Mountain Academy Water System (130 people). Your water bill names your system.
Summary
No federal limits exceeded in EPA data.
- PFAS
- Not detectedNone of 29 PFAS found above EPA's reporting limits in 38 samples (2023–2025).
- Lithium
- Above screening levelHighest result 24.7 ppb. EPA uses 10 ppb to decide what to study further. It is not a health limit, and there is no federal limit for lithium. About 1 in 4 systems tested were above it.
- Lead
- Below action level0 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period Jan 2024 – now, still in progress (results reported so far). Your home's pipes can make yours higher.
- Violations
- None health-basedNo health-based violations since 2016.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Town of Prescott Valley's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (928) 759-3089. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 19 entry points tested Mar 2024 to Dec 2025. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Not detected Guideline 2,000 ppt | – |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Not detected Guideline 3,000 ppt | – |
29 PFAS tested, 0 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Detected in 4 of 38 samples. Highest result 24.7 ppb. EPA's non-enforceable screening level is 10 ppb. Above screening level The screening level is how EPA decides what to study further, not a health limit. There is no federal limit for lithium and no filter is certified to remove it. About lithium.
Lead and copper
Latest 90th percentile: 0 ppb lead (Jan 2024 – now (in progress)). Below action level
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2024 – now (in progress) | 0 ppb |
| Jan 2021 – Dec 2023 | 0 ppb |
| Jan 2019 – Dec 2021 | 0 ppb |
Earlier results (9)
| Jul 2020 – Dec 2020 | 0 ppb |
| Jan 2020 – Jun 2020 | 0 ppb |
| Jan 2017 – Dec 2019 | 0 ppb |
| Jan 2016 – Dec 2018 | 0 ppb |
| Jan 2014 – Dec 2016 | 0 ppb |
| Jan 2013 – Dec 2015 | 0 ppb |
| Jan 2011 – Dec 2013 | 0 ppb |
| Jan 2010 – Dec 2012 | 2 ppb |
| Jan 2008 – Dec 2010 | 2 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 3.4 ppb | 300 ppb |
| Vanadium | 34 ppb | 21 ppb |
| Strontium | 0.38 ppm | 1.5 ppm |
| Cobalt | 1.1 ppb | 70 ppb |
| Chromium-6 | 16 ppb | – |
| Molybdenum | 3.3 ppb | 40 ppb |
Where it serves
Prescott Valley
ZIP codes the system reported serving: 86314, 86315, 86327
Nearby utilities
- City of Prescott Prescott · 7 mi · PFAS above limit
- Arizona Water Company – Sedona Sedona · 35 mi · PFAS above limit
- Big Park Water Company Sedona · 35 mi · PFAS above limit
- City of Peoria Peoria · 56 mi
- City of Flagstaff Flagstaff · 57 mi
- Town of Payson Payson · 62 mi · PFAS above limit
Questions
Is Prescott Valley tap water safe to drink?
Most of Prescott Valley gets its water from Town of Prescott Valley. Town of Prescott Valley has no health-based violations since 2016. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Prescott Valley water have PFAS?
EPA tested Town of Prescott Valley for 29 PFAS between Mar 2024 and Dec 2025 and none were detected above the reporting limits (about 2 to 20 ppt depending on the chemical).
What is the lead level in Prescott Valley water?
The most recent 90th-percentile lead result for Town of Prescott Valley is 0 ppb, for the monitoring period that began Jan 2024 (still in progress). The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for AZ0413048: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID AZ0413048).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Town of Prescott Valley at (928) 759-3089, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.