Is Oak Park, MI tap water safe?
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data for Oak Park Water System. 1 PFAS were detected below the limits.
Oak Park Water System supplies Oak Park (29,654 people).
Water system
Oak Park Water System
29,654 people · Purchased surface water · EPA ID MI0004880
Buys treated water from Great Lakes Water Authority.
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS Not detected | – | 4 ppt |
| PFHxS Not detected | – | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.
Lead: 0 ppb at the 90th percentile (Dec 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0
Across Michigan, 5 of 311 water systems EPA tested had PFAS above a 2024 federal limit, and 26 systems were above the lead action level in results from the last five years. Michigan results.
Oak Park homes and lead pipes
Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.
Housing: Census American Community Survey 2020–2024 5-year estimates for Oak Park city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Royal Oak 3 mi City of Royal Oak | None above limits | 4 ppb |
| Southfield 4 mi Southfield Water System | None above limits | 0 ppb |
| Madison Heights 5 mi Madison Heights Water System | None above limits | 7.4 ppb |
| Detroit 7 mi City of Detroit | None above limits | 7.5 ppb |
| Redford charter 7 mi Waterford Township | None above limits | 1 ppb |
| Hamtramck 8 mi Hamtramck Water System | None above limits | 11.9 ppb |
Oak Park ZIP codes (1)
- 48237
Questions
Is Oak Park tap water safe to drink?
Oak Park Water System has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.
Who supplies water in Oak Park, MI?
Oak Park Water System, which serves 29,654 people.
Does Oak Park tap water have PFAS?
Oak Park Water System had 1 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.
Do Oak Park homes have lead pipes?
Census estimates put 89% of Oak Park homes as built before 1980 (Michigan: 62%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Oak Park Water System's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.