Skip to main content
WaterSafeCheck

Maricopa, AZ Tap Water Quality

Water safety reports for all 4 ZIP codes in Maricopa, Arizona

Average Score

56/100

Health Violations

108

ZIP Codes

4

High Lead Risk

0

of 4 ZIP codes

C

About Tap Water in Maricopa, AZ

Water quality in Maricopa, AZ is currently rated with a moderate C grade (average score: 56/100 across 4 ZIP codes). This rating indicates that while the water provided by Gw Santa Cruz Water Company is treated and regulated, there have been notable compliance issues or contaminant detections recently. Residents should stay informed about the specific challenges affecting their local supply.

The accumulation of 108 health-based violations over the past 5 years highlights systemic challenges within Maricopa's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by Arizona Department of Environmental Quality. The city relies on ground water, which may require significant treatment upgrades to address these recurring issues.

Fortunately, the modeled risk for widespread lead exposure in Maricopa's municipal water is relatively low compared to national averages. However, because lead typically enters drinking water through the corrosion of older, individual home plumbing rather than the main supply lines, residents in homes built before 1986 should still exercise caution by running the tap before use.

Health-Based Contaminant Violations in Maricopa

EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Maricopa water systems over the past 5 years.

LeadConsumer Confidence Report RuleCombined RadiumBariumStage 2 DBP Rule

Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.

Water Quality by ZIP Code — Maricopa, AZ

Click any ZIP code for the full water quality report

C
85138

Maricopa, AZ

Score: 58/10027 violations
C
85139

Maricopa, AZ

Score: 58/10027 violations
C
85239

Maricopa, AZ

Score: 58/10027 violations
D
85238

Maricopa, AZ

Score: 50/10027 violations

Frequently Asked Questions — Maricopa Water Quality

Is tap water safe to drink in Maricopa, AZ?+
Tap water in Maricopa has a grade of C, indicating compliance concerns in recent years. Families with young children or pregnant women should consider using a certified NSF/ANSI 53 water filter for drinking and cooking.
What is the water quality score for Maricopa?+
The average water quality score across 4 ZIP codes in Maricopa, AZ is 56/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Maricopa have lead in its tap water?+
Lead risk ratings in Maricopa are relatively low based on EPA monitoring data. However, lead in home plumbing is a separate concern — if your home was built before 1986, individual tap testing is recommended.
How do I get the water quality report for Maricopa?+
Each ZIP code in Maricopa has a full water quality report on this site — click any ZIP code below. You can also get the annual Consumer Confidence Report (CCR) from your local water utility. The CCR is required to be published every year by July 1 and contains actual contaminant measurements and violation history.
Where does Maricopa's tap water come from?+
Tap water in Maricopa, AZ primarily comes from ground water. Groundwater systems pump water from underground aquifers, which is naturally filtered through soil and rock but can still contain naturally occurring contaminants.

Looking for water quality in other cities in Arizona?

View All Cities in Arizona →