F0/100
ORO VALLEY WATER UTILITY — Water Quality Report 2026
Serving 42,316 people · Arizona
Water Source
Groundwater
County
—
System ID
AZ0410164
Violations
1806
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2019.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About ORO VALLEY WATER UTILITY
Is ORO VALLEY WATER UTILITY water safe to drink?
ORO VALLEY WATER UTILITY water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 1806 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ORO VALLEY WATER UTILITY detected?
66 contaminants were tested in ORO VALLEY WATER UTILITY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ORO VALLEY WATER UTILITY have any EPA violations?
Yes, ORO VALLEY WATER UTILITY has 1806 EPA violation(s) on record, with the most recent in 2019. Violation types include MR, MCL, Other. 8 are health-based violations.
How many people does ORO VALLEY WATER UTILITY serve?
ORO VALLEY WATER UTILITY serves approximately 42,316 people, Arizona. The system provides water to 1 community: Oro Valley.
What type of water does ORO VALLEY WATER UTILITY provide?
ORO VALLEY WATER UTILITY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0410164.
How does ORO VALLEY WATER UTILITY compare to other utilities in Arizona?
ORO VALLEY WATER UTILITY scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Arizona state page for a full comparison of water systems.