F0/100
Upper Moenkopi — Water Quality Report 2026
Serving 1,740 people · Arizona
Water Source
Groundwater
County
—
System ID
090400104
Violations
311
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
3
Unresolved
0
Health-Related
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024 – December 31, 2024Rule: Stage 1 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
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 Upper Moenkopi
Is Upper Moenkopi water safe to drink?
Upper Moenkopi water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 311 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has Upper Moenkopi detected?
1 contaminants were tested in Upper Moenkopi's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Upper Moenkopi have any EPA violations?
Yes, Upper Moenkopi has 311 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, Other, MCL. 8 are health-based violations.
How many people does Upper Moenkopi serve?
Upper Moenkopi serves approximately 1,740 people, Arizona. The system provides water to 1 community: Upper Moenkopi.
What type of water does Upper Moenkopi provide?
Upper Moenkopi sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is 090400104.
How does Upper Moenkopi compare to other utilities in Arizona?
Upper Moenkopi scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Arizona state page for a full comparison of water systems.