D38/100
THREE MILE WATER DIST — Water Quality Report 2026
Serving 2,458 people · Idaho
Water Source
Groundwater
County
—
System ID
ID1110028
Violations
31
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.56 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.011 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 THREE MILE WATER DIST
Is THREE MILE WATER DIST water safe to drink?
THREE MILE WATER DIST water receives a grade of D (38/100), which is considered poor. 1 contaminant(s) exceed EPA legal limits and 31 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has THREE MILE WATER DIST detected?
2 contaminants were tested in THREE MILE WATER DIST's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does THREE MILE WATER DIST have any EPA violations?
Yes, THREE MILE WATER DIST has 31 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MCL, MR. 5 are health-based violations.
How many people does THREE MILE WATER DIST serve?
THREE MILE WATER DIST serves approximately 2,458 people, Idaho.
What type of water does THREE MILE WATER DIST provide?
THREE MILE WATER DIST sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is ID1110028.
How does THREE MILE WATER DIST compare to other utilities in Idaho?
THREE MILE WATER DIST scores 38/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Idaho state page for a full comparison of water systems.