Waukesha County, Wisconsin
32 ZIP codes · Avg score 52/100 · Grade D
ZipCheckup grade for Waukesha County: D.
Federal records show several conditions worth reviewing.
In Waukesha County, the Home Safety grade falls below the midpoint of the scale; this page tracks 32 ZIP codes there.
How Waukesha County Compares
How Waukesha County Compares
Waukesha County scores 18 points below the Wisconsin state average (70/100) and 21 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: Waukesha County, Wisconsin
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 10.2%, diabetes 10.5%)
Modeled additional annual cost estimate per homeowner: $962, largest modeled factor: Flood
49% of homes built before 1980 (lead paint was banned for residential use in 1978)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $962
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
176,283 housing units in Waukesha County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Waukesha County
Modeled remediation costs in Waukesha County can be compared with the median property value; actual costs vary by property.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Waukesha County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Waukesha County ZIP codes
8 community water systems mapped to Waukesha County ZIP codes; EPA may list more systems serving the county.
- D
- F
- D
- C
- C
- C
Show all 8 water systems
- D
- D
39 water systems mapped to Waukesha County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Waukesha County
5 water systems with violations in EPA records.
- D
- F
- F
- F
All ZIP Codes in Waukesha County
32 ZIP codes tracked in Waukesha County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 53122 | Elm Grove | 65 | C | 6 (1 health) | $470K |
| 2 | 53149 | Mukwonago | 65 | C | 4 | $385K |
| 3 | 53005 | Brookfield | 64 | C | 8 (1 health) | $386K |
| 4 | 53151 | New Berlin | 64 | C | 2 | $351K |
| 5 | 53051 | Menomonee Falls | 62 | C | 10 (2 health) | $342K |
| 6 | 53045 | Brookfield | 61 | C | 22 (11 health) | $444K |
| 7 | 53066 | Oconomowoc | 60 | C | 10 (2 health) | $403K |
| 8 | 53150 | Muskego | 60 | C | 7 (1 health) | $391K |
| 9 | 53089 | Sussex | 50 | D | 42 (22 health) | $387K |
| 10 | 53146 | New Berlin | 50 | D | 76 (60 health) | $319K |
| 11 | 53189 | Waukesha | 50 | D | 79 (60 health) | $373K |
| 12 | 53029 | Hartland | 33 | F | 50 (25 health) | $450K |
| 13 | 53072 | Pewaukee | 33 | F | 142 (95 health) | $424K |
| 14 | 53186 | Waukesha | 33 | F | 97 (71 health) | $278K |
| 15 | 53188 | Waukesha | 33 | F | 133 (94 health) | $317K |
| 16 | 53007 | Butler | — | — | 2 | $216K |
| 17 | 53008 | Brookfield | — | — | — | |
| 18 | 53017 | Colgate | — | — | 6 (1 health) | $477K |
| 19 | 53018 | Delafield | — | — | 26 (6 health) | $485K |
| 20 | 53046 | Lannon | — | — | 0 | $256K |
| 21 | 53052 | Menomonee Falls | — | — | — | |
| 22 | 53056 | Merton | — | — | — | |
| 23 | 53058 | Nashotah | — | — | 23 (4 health) | $506K |
| 24 | 53064 | North Lake | — | — | — | |
| 25 | 53069 | Okauchee | — | — | 2 | $399K |
| 26 | 53103 | Big Bend | — | — | $381K | |
| 27 | 53118 | Dousman | — | — | 3 (1 health) | $367K |
| 28 | 53119 | Eagle | — | — | 4 | $374K |
| 29 | 53127 | Genesee Depot | — | — | 4 | — |
| 30 | 53153 | North Prairie | — | — | 4 | $394K |
| 31 | 53183 | Wales | — | — | 76 (61 health) | $383K |
| 32 | 53187 | Waukesha | — | — | — |
Recommended Buyer Guides for Waukesha County
These buyer guides are matched by rule rather than by hand - a PFAS record adds a PFAS filter guide, a lead action-level exceedance adds lead filter guides, a high share of pre-1978 homes adds lead paint test kits, EPA Radon Zone 1 add radon kits, and a top flood or wildfire risk adds related equipment.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Waukesha County, Wisconsin
Overview
Waukesha County in Wisconsin covers 32 tracked ZIP records with an average Home Safety Score of D (52/100) across 15 scored records.
25 of 26 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 104 health-based violations appear in the available health breakdown.
← Back to Wisconsin Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
What You Can Do
Waukesha County has an average Home Safety grade of D across its scored ZIP records. Here are steps to protect your household.
Test your tap water
Ask a certified laboratory which tests it offers for lead, bacteria, and other contaminants relevant to your home; a $20-$50 kit may cover only certain contaminants.
Consider a certified water filter
NSF/ANSI-certified filters reduce the specific contaminants listed on their certification. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It reports monitored contaminants detected in the utility's water and related compliance information.
Check for lead in your home
49% of homes in this county were built before 1980. Older plumbing and solder can leach lead into drinking water, especially after water sits in the pipes.