PWSID
MN1100002
State
Minnesota
City
Chaska
Population served
30,000
Primary source
Groundwater
Score history
No change since tracking began Jun 18, 2026.
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 Oct 2023). Levels in parts per trillion (ppt).
Lithium
15,000 ppt
limit —
Violations & enforcement
1
Violations on record
0
Unaddressed
0
Health-based
5
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Nov 2001. Official EPA record →
Recent enforcement actions
- State action · SOX Nov 2001
- State action · SFJ Nov 2001
- State action · SIA Sep 1986
- State action · SOX Sep 1986
- State action · SOX Sep 1984
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
6 stations · latest Oct 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 MN1100002 — 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.