Is Oak Creek, WI 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 Creek Waterworks.
Oak Creek Waterworks supplies Oak Creek (32,104 people).
Water system
Oak Creek Waterworks
32,104 people · Surface water · EPA ID WI2410172
| 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: 2 ppb at the 90th percentile (Sep 2023, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 5
Across Wisconsin, 18 of 196 water systems EPA tested had PFAS above a 2024 federal limit, and 4 systems were above the lead action level in results from the last five years. Wisconsin results.
Oak Creek 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 Creek city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Franklin 6 mi Franklin Water Utility | None above limits | 3 ppb |
| Caledonia 6 mi Village of Caledonia Water Utility | None above limits | 3.3 ppb |
| West Allis 11 mi West Allis Waterworks | None above limits | 2.4 ppb |
| Racine 12 mi Racine Waterworks | None above limits | 3.3 ppb |
| Muskego 12 mi Muskego Water Utility | None above limits | 3.89 ppb |
| Milwaukee 13 mi Milwaukee Waterworks | None above limits | 5.3 ppb |
Oak Creek ZIP codes (1)
- 53154
Questions
Is Oak Creek tap water safe to drink?
Oak Creek Waterworks had 5 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 Creek, WI?
Oak Creek Waterworks, which serves 32,104 people.
Does Oak Creek tap water have PFAS?
None detected above EPA's reporting limits. Oak Creek Waterworks had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.
Do Oak Creek homes have lead pipes?
Census estimates put 36% of Oak Creek homes as built before 1980 (Wisconsin: 57%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Oak Creek Waterworks'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.