Maricopa, AZ
GW SANTA CRUZ WATER CO · Serves 84K people · Groundwater
Select your water system from the dropdown below
contaminants
detected
exceed
guidelines
Most concerning
Arsenic
1828×health limit
TraceAlso detected: Lead, strontium, chlorate, Fluoride, Barium, Copper, vanadium, Chromium (total), molybdenum, Gross alpha, Selenium, manganese… (+13 more contaminants)
Enter your email to receive the latest report in PDF
The truth about legal limits
Legal does not equal safe.
Meeting EPA legal limits does not mean your water is safe for drinking.
We benchmark against the strictest independent health-based guidelines.
All Contaminants
24Filter by health risk
Critical findings — every contaminant in your water that exceeds the EWG health limit by 10× or more. Start here.
Filtration Analysis
Viven
Multi-stage
Activated
Carbon filter
Reverse
Osmosis only
PFAS / Forever Chemicals
Viven
99.9%Carbon
PartialRO only
YesHeavy Metals
Viven
99.9%Carbon
LimitedRO only
YesRadionuclides
Viven
99.9%Carbon
NoRO only
YesMinerals re-added
Viven
YesCarbon
NoRO only
NoContaminants in your water that Viven removes
Reserve nowFrequently asked
Maricopa water quality questions
- Is tap water in Maricopa, AZ (ZIP 85139) safe to drink?
- Tap water for ZIP 85139, served by GW SANTA CRUZ WATER CO, has 13 contaminants detected above independent EWG health guidelines, including Arsenic at 1828× the guideline. Meeting EPA legal limits does not necessarily mean water is safe — federal legal limits are often far higher than the latest health-based guidelines.
- What contaminants are in Maricopa, AZ tap water?
- EPA monitoring data for ZIP 85139 shows 23 contaminants detected, including Arsenic, Chromium-6, HAA9, HAA6Br, TTHM, HAA5. Each detected level is compared against both EPA legal limits and the stricter EWG health guidelines.
- Does Maricopa, AZ tap water have PFAS ("forever chemicals")?
- No PFAS were detected in the available testing (30 compounds tested) for ZIP 85139. PFAS testing coverage varies by water system, so absence in the data does not guarantee none are present.
- How can I remove these contaminants from my drinking water?
- A multi-stage filtration system that combines activated carbon, reverse osmosis, and remineralization removes PFAS, heavy metals, and disinfection byproducts while restoring beneficial minerals. The Viven faucet is engineered to remove 99.9% of the contaminants found in tap water.
- Where does this Maricopa, AZ water quality data come from?
- This report is built from U.S. EPA data: the Unregulated Contaminant Monitoring Rule (UCMR 3/4/5), the Six-Year Review (SYR4), the Lead and Copper Rule (LCR), and SDWIS violation records. Detected levels are compared against EPA legal limits and Environmental Working Group (EWG) health guidelines. Data last updated 2026-05-01.
Check water quality for another area