A86/100
Stillwater — Water Quality Report 2026
Serving 19,462 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1820024
Violations
3
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.008 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
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: July 2, 2025 – November 22, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – December 12, 2022Enforcement: 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 Stillwater
Is Stillwater water safe to drink?
Stillwater water receives a grade of A (86/100), which is considered excellent. Out of 66 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Stillwater detected?
66 contaminants were tested in Stillwater's water. Notable contaminants include PFOS, Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does Stillwater have any EPA violations?
Yes, Stillwater has 3 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, MR.
How many people does Stillwater serve?
Stillwater serves approximately 19,462 people, Minnesota.
What type of water does Stillwater provide?
Stillwater sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1820024.
How does Stillwater compare to other utilities in Minnesota?
Stillwater scores 86/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Minnesota state page for a full comparison of water systems.