Johnson Creek, WI: 1 Health Violation — 69/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
Across Johnson Creek, EPA compliance data for WI sits at a moderate level — not alarming, but not uniformly clean across all service areas either.
How Johnson Creek Compares
Data: EPA SDWIS Last verified: 2026-06-03
Johnson Creek Water: The Quick Version
- Your city's water systems recorded 17 violations in the past 5 years.
- Average lead level: 0.0028 mg/L.
- Homes built before 1986: 42% — older plumbing may contain lead solder.
- Estimated remediation: $2,700 per household.
- CDC health risk index: 12.75 — above typical levels.
Water Systems Serving Johnson Creek
3 independent water providers serve Johnson Creek, WI — 3 systems appear in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Johnson Creek, Wisconsin (population ~4,319), covering 3 community water systems serving approximately 6,868 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. 1 health-based violation documented.
Home Safety Score
Average Home Safety Score for Johnson Creek: C (69/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Johnson Creek water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0028 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | 10 | 1 |
| Combined Radium | Radionuclides | 6 | 1 |
| Consumer Confidence Report Rule | Reporting | 6 | 1 |
| Stage 1 DBP Rule | Treatment Technique | 4 | 1 |
| Stage 2 DBP Rule | Treatment Technique | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 53038 | C | 17 | 1 | Johnson Creek Waterworks |
All ZIP Codes in Johnson Creek
- 53038 [C] — 17 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Johnson Creek
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Johnson Creek
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Johnson Creek's Housing Stock?
With 42% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
The story of Johnson Creek's housing stock is one of layered development — neighborhoods built in different decades, each carrying the plumbing standards of their era. The median build year of 1996 reflects that layered character. Before 1986, lead solder was standard in copper plumbing; before 1970, lead pipes were commonly used for service lines. A substantial portion of the pre-1986 homes visible in the distribution above still carry the plumbing materials of those earlier standards — creating a risk environment that the city-wide aggregate water data doesn't fully capture.
Most homes in Johnson Creek were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Johnson Creek: Remediation Cost in Perspective
The household financial picture for Johnson Creek homeowners is proportionally favorable — addressing documented issues claims a small slice of equity, and the cost-to-value ratio puts this area well within the manageable tier.
Remediation costs in Johnson Creek are relatively low compared to home values. The $1,750–$3,900 estimated range is a small fraction of median property value. Home values are 29% above the Wisconsin average.
Protecting Children from Lead in Johnson Creek
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Older stock in Johnson Creek represents 42% of the inventory, and citywide monitoring runs at or above the federal action level — making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Johnson Creek
The National Flood Insurance Program captures decades of claims at the local level, building a record of cumulative community flood exposure. For Johnson Creek, that record documents 1 claim and 100% of ZIP codes inside FEMA-designated flood zones. What makes those numbers relevant to water quality is the set of mechanisms flooding activates: heavy precipitation that floods treatment intake zones can introduce contaminants upstream of normal filtration; well casings in low-lying areas can be infiltrated by floodwaters carrying bacteria, sediment, and chemical residue; and distribution system pressure changes during flooding can create backflow conditions. These effects become more probable as flood frequency and magnitude increase — and the NFIP record indicates both are meaningful factors locally.
Johnson Creek has a moderate flood history with 1 FEMA claims averaging $43 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,700</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Johnson Creek
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Surface Water Treatment Rule can reduce the most common contaminant found in Johnson Creek's water.
- Check your home's plumbing. With 42% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Johnson Creek, WI