C47/100
Mariano Lake-Pinedale-Church Rock NTUA — Water Quality Report 2026
Serving 4,562 people · Arizona
Water Source
Groundwater
County
—
System ID
NN3500211
Violations
34
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.012 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2021.
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 Mariano Lake-Pinedale-Church Rock NTUA
Is Mariano Lake-Pinedale-Church Rock NTUA water safe to drink?
Mariano Lake-Pinedale-Church Rock NTUA water receives a grade of C (47/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 34 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has Mariano Lake-Pinedale-Church Rock NTUA detected?
31 contaminants were tested in Mariano Lake-Pinedale-Church Rock NTUA's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Mariano Lake-Pinedale-Church Rock NTUA have any EPA violations?
Yes, Mariano Lake-Pinedale-Church Rock NTUA has 34 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, MON, Other. 4 are health-based violations.
How many people does Mariano Lake-Pinedale-Church Rock NTUA serve?
Mariano Lake-Pinedale-Church Rock NTUA serves approximately 4,562 people, Arizona. The system provides water to 1 community: Mariano Lake, Pinedale, Churchrock.
What type of water does Mariano Lake-Pinedale-Church Rock NTUA provide?
Mariano Lake-Pinedale-Church Rock NTUA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NN3500211.
How does Mariano Lake-Pinedale-Church Rock NTUA compare to other utilities in Arizona?
Mariano Lake-Pinedale-Church Rock NTUA scores 47/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Arizona state page for a full comparison of water systems.