C45/100
Cottonwood-Tselani NTUA — Water Quality Report 2026
Serving 1,334 people · Arizona
Water Source
Purchased Groundwater
County
—
System ID
NN0403021
Violations
36
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 Cottonwood-Tselani NTUA
Is Cottonwood-Tselani NTUA water safe to drink?
Cottonwood-Tselani NTUA water receives a grade of C (45/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 36 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has Cottonwood-Tselani NTUA detected?
1 contaminants were tested in Cottonwood-Tselani NTUA's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Cottonwood-Tselani NTUA have any EPA violations?
Yes, Cottonwood-Tselani NTUA has 36 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, Other, MCL. 4 are health-based violations.
How many people does Cottonwood-Tselani NTUA serve?
Cottonwood-Tselani NTUA serves approximately 1,334 people, Arizona. The system provides water to 1 community: Cottonwood, Tselani.
What type of water does Cottonwood-Tselani NTUA provide?
Cottonwood-Tselani NTUA sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NN0403021.
How does Cottonwood-Tselani NTUA compare to other utilities in Arizona?
Cottonwood-Tselani NTUA scores 45/100 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.