B63/100
Chilchinbeto NTUA — Water Quality Report 2026
Serving 1,276 people · Arizona
Water Source
Groundwater
County
—
System ID
NN0400290
Violations
34
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
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – September 24, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – September 24, 2024Enforcement: Resolving — corrective action underway
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 Chilchinbeto NTUA
Is Chilchinbeto NTUA water safe to drink?
Chilchinbeto NTUA water receives a grade of B (63/100), which is considered good. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Chilchinbeto NTUA detected?
1 contaminants were tested in Chilchinbeto NTUA's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Chilchinbeto NTUA have any EPA violations?
Yes, Chilchinbeto NTUA has 34 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MON, Other.
How many people does Chilchinbeto NTUA serve?
Chilchinbeto NTUA serves approximately 1,276 people, Arizona. The system provides water to 1 community: Chilchinbeto.
What type of water does Chilchinbeto NTUA provide?
Chilchinbeto NTUA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NN0400290.
How does Chilchinbeto NTUA compare to other utilities in Arizona?
Chilchinbeto NTUA scores 63/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Arizona state page for a full comparison of water systems.