F11/100
PRAIRIE ISLAND — Water Quality Report 2026
Serving 6,699 people · Minnesota
Water Source
Groundwater
County
—
System ID
055294502
Violations
86
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – October 12, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 1, 2023 – September 20, 2023Rule: Total Coliform RuleEnforcement: 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, 2023 – December 31, 2023Enforcement: 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 PRAIRIE ISLAND
Is PRAIRIE ISLAND water safe to drink?
PRAIRIE ISLAND water receives a grade of F (11/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 86 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PRAIRIE ISLAND detected?
31 contaminants were tested in PRAIRIE ISLAND's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does PRAIRIE ISLAND have any EPA violations?
Yes, PRAIRIE ISLAND has 86 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, MR, Other.
How many people does PRAIRIE ISLAND serve?
PRAIRIE ISLAND serves approximately 6,699 people, Minnesota.
What type of water does PRAIRIE ISLAND provide?
PRAIRIE ISLAND sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is 055294502.
How does PRAIRIE ISLAND compare to other utilities in Minnesota?
PRAIRIE ISLAND scores 11/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Minnesota state page for a full comparison of water systems.