Water Quality Report · Updated October 07, 2026
TOWN OF PRESCOTT VALLEY
TOWN OF PRESCOTT VALLEY delivers tap water graded C (70/100) by TapWaterSafety.org. The utility serves approximately 57,048 residents in PRESCOTT VALLEY, Arizona using groundwater. The most significant water quality concerns are: Arsenic significantly above health guideline; Chromium (hexavalent) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. For questions, the utility can be reached at 928-759-9062.
Is PRESCOTT VALLEY tap water safe to drink?
TOWN OF PRESCOTT VALLEY delivers tap water that earns a grade of C (70/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 57,048 residents in PRESCOTT VALLEY, drawing from groundwater.
Public testing data identifies 9 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Chromium (hexavalent), Total trihalomethanes (TTHMs), Dibromochloromethane, Haloacetic acids (HAA9), Bromodichloromethane, Nitrate, Nitrate and nitrite, Bromoform. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for TOWN OF PRESCOTT VALLEY (system ID AZ0413048) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 01/01/2024 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for PRESCOTT VALLEY residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for TOWN OF PRESCOTT VALLEY.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 5.49 ppb, 1372x above the EWG health guideline of 0.004 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 5.44 ppb, 272x above the EWG health guideline of 0.02 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 5.75 ppb, 38x above the EWG health guideline of 0.15 ppb.
Contact TOWN OF PRESCOTT VALLEY
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for PRESCOTT VALLEY
Filters matched to the specific contaminants in this water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts like TTHM. Look for NSF/ANSI 53 VOC or chloroform reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 70/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
5.49 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1372× over |
| Chromium (hexavalent) Heavy metal |
5.44 ppb | 0.02 | — | — | — | — | — | 272× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
5.75 ppb | 0.15 | 80.0 | 100 | — | — | — | 38× over |
| Dibromochloromethane Disinfection byproduct |
2.3 ppb | 0.1 | — | — | — | — | — | 23× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.916 ppb | 0.06 | — | — | — | — | — | 15× over |
| Bromodichloromethane Disinfection byproduct |
0.725 ppb | 0.06 | — | — | — | — | — | 12× over |
| Nitrate Inorganic |
1.04 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 7.4× over |
| Nitrate and nitrite Inorganic |
0.8 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 5.7× over |
| Bromoform Disinfection byproduct |
2.75 ppb | 0.5 | — | — | — | — | — | 5.5× over |
| Vanadium Other |
20.7 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.62 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
36.4 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
1.65 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Cobalt Other |
0.025 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.307 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.00773 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
7.33 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.278 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
1.87 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
TOWN OF PRESCOTT VALLEY service area
This water system serves 1 community in Yavapai County, Arizona. Click any city for its dedicated tap water quality page.
Find the right filter for PRESCOTT VALLEY water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.