Tap Water Quality Report
Tap water quality in PRESCOTT VALLEY, Arizona
Tap water in PRESCOTT VALLEY, Arizona receives a grade of C (70/100) from TapWaterSafety.org. It's served by TOWN OF PRESCOTT VALLEY. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in PRESCOTT VALLEY's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving 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.
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.
Recommended filters for PRESCOTT VALLEY
Filters matched to the specific contaminants in PRESCOTT VALLEY's 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.
All contaminants detected in PRESCOTT VALLEY's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. 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, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from TOWN OF PRESCOTT VALLEY.