ZIP Code 48178
Low Level2
PFAS Detected
0
Above EPA Limits
1
Water System
54%
Highest % of MCL
SOUTH LYON, CITY OF
MI0006110 Low LevelWater Type
Groundwater
PFAS Detected
2
Above MCL
0
State
Michigan
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
HFPO-DA GenX (Hexafluoropropylene oxide dimer acid) | 5.40ppt | 54% of limit
| 10 ppt | Below limit |
lithium | 9980.00ppt | No federal limit | — | Unregulated |
Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.
UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.
Detection values represent the highest single-sample result measured at entry points to the distribution system.