Is De Pere, 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 De Pere Waterworks Service Area 1.
4 public water systems serve parts of De Pere. The largest, De Pere Waterworks Service Area 1, serves 25,660 people. Your water bill names your system.
Largest system
De Pere Waterworks Service Area 1
25,660 people · Purchased surface water · EPA ID WI4050453
Buys treated water from Central Brown County 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: 0.66 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: 0
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.
De Pere 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 De Pere city (tables B25034, B25003). Estimates for small places have a margin of error.
Other water systems serving De Pere
- Ledgeview Tn Sanitary District 27,602 people · Purchased surface water · Wisconsin · lists this cityTotal trihalomethanes (TTHM) violationAlso: Lithium above screening level
- Lawrence Waterworks5,398 people · Purchased surface water · Wisconsin · lists this cityNo PFAS above limits
- De Pere Waterworks Service Area 2118 people · Purchased surface water · Wisconsin · lists this cityNot in EPA's PFAS sample
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Green Bay 8 mi Green Bay Waterworks | None above limits | 2.5 ppb |
| Appleton 19 mi Appleton Waterworks | None above limits | 1.3 ppb |
| Neenah 27 mi Neenah Waterworks | None above limits | 10 ppb |
| Manitowoc 30 mi Manitowoc Waterworks | None above limits | 7.7 ppb |
| Oshkosh 37 mi Oshkosh Waterworks | None above limits | 6.1 ppb |
| Fond du Lac 49 mi Fond du Lac Waterworks | None above limits | 6.1 ppb |
De Pere ZIP codes (1)
- 54115
Questions
Is De Pere tap water safe to drink?
De Pere Waterworks Service Area 1 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 De Pere, WI?
4 public water systems serve parts of De Pere. The largest is De Pere Waterworks Service Area 1 (25,660 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.
Does De Pere tap water have PFAS?
None detected above EPA's reporting limits. De Pere Waterworks Service Area 1 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 De Pere homes have lead pipes?
Census estimates put 42% of De Pere 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. De Pere Waterworks Service Area 1'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.