B64/100
Dennehotso NTUA — Water Quality Report 2026
Serving 1,040 people · Arizona
Water Source
Groundwater
County
—
System ID
NN0400296
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 2017.
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 Dennehotso NTUA
Is Dennehotso NTUA water safe to drink?
Dennehotso NTUA water receives a grade of B (64/100), 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 Dennehotso NTUA detected?
1 contaminants were tested in Dennehotso NTUA's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Dennehotso NTUA have any EPA violations?
Yes, Dennehotso NTUA has 33 EPA violation(s) on record, with the most recent in 2017. Violation types include MON, MR.
How many people does Dennehotso NTUA serve?
Dennehotso NTUA serves approximately 1,040 people, Arizona. The system provides water to 1 community: Dennehotso.
What type of water does Dennehotso NTUA provide?
Dennehotso NTUA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NN0400296.
How does Dennehotso NTUA compare to other utilities in Arizona?
Dennehotso NTUA scores 64/100 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.