C56/100
Oljato NTUA — Water Quality Report 2026
Serving 1,276 people · Arizona
Water Source
Groundwater
County
—
System ID
NN4900224
Violations
33
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 2020.
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 Oljato NTUA
Is Oljato NTUA water safe to drink?
Oljato NTUA water receives a grade of C (56/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 33 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has Oljato NTUA detected?
1 contaminants were tested in Oljato NTUA's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Oljato NTUA have any EPA violations?
Yes, Oljato NTUA has 33 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, Other, MCL. 2 are health-based violations.
How many people does Oljato NTUA serve?
Oljato NTUA serves approximately 1,276 people, Arizona. The system provides water to 1 community: Oljeto.
What type of water does Oljato NTUA provide?
Oljato NTUA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NN4900224.
How does Oljato NTUA compare to other utilities in Arizona?
Oljato NTUA scores 56/100 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.