PWSID
MN1820024
State
Minnesota
City
Stillwater
Population served
19,462
Primary source
Groundwater
Score history
▼ 52 points — the score moved from 100 to 48 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Jun 2025). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
8.1 ppt
limit 4 ppt
PFOA
Perfluorooctanoic acid
4 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
7.2 ppt
limit 10 ppt
Lithium
9,000 ppt
limit —
PFBA
108 ppt
limit —
PFPeA
3.8 ppt
limit —
Violations & enforcement
2
Violations on record
0
Unaddressed
0
Health-based
9
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jan 2025. Official EPA record →
Recent enforcement actions
- State action · SFJ Jan 2025
- State action · SOX Nov 2024
- State action · SOX Dec 2022
- State action · SFJ Nov 2022
- State action · SIA Dec 1989
- State action · SIA Sep 1989
- State action · SIA Sep 1988
- State action · SIA Sep 1987
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
2 stations · latest Oct 2024
Copper
2 stations · latest Aug 2025
Lead
2 stations · latest Aug 2025
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system MN1820024 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.