PWSID
MI0006110
State
Michigan
City
SOUTH LYON
Population served
11,055
Primary source
Groundwater
Score history
▼ 1 point — the score moved from 100 to 99 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 Feb 2025). Levels in parts per trillion (ppt).
GenX (HFPO-DA)
GenX (HFPO-DA)
5.4 ppt
limit 10 ppt
Lithium
9,980 ppt
limit —
Violations & enforcement
1
Violations on record
0
Unaddressed
0
Health-based
8
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Apr 2024. Official EPA record →
Recent enforcement actions
- State action · SIF Apr 2024
- State action · SOX Jan 2024
- State action · SIE Aug 2023
- State action · SIA Aug 2023
- State action · SOX Nov 2008
- State action · SIA Oct 2008
- State action · SIF Oct 2008
- State action · SIE Oct 2008
This profile is built from EPA public records for system MI0006110 — 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.