Grafton, WI: 8 Violations — 71/100 (2026)
1 ZIP code · 8 water systems · Updated 2026-06-03
Residents of Grafton generally live with tap water that beats the WI safety average on key EPA compliance metrics.
How Grafton Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Grafton Water
- Your city's water systems recorded 8 violations in the past 5 years.
- Average lead level: 0.0033 mg/L.
- Homes built before 1986: 50% — older plumbing may contain lead solder.
- Estimated remediation: $2,200 per household.
- CDC health risk index: 11.4.
Who Supplies Your Water in Grafton
3 independent water providers serve Grafton, WI — 8 systems appear in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Grafton, Wisconsin (population ~19,040), covering 8 community water systems serving approximately 41,490 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Grafton: B (71/100)
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
Grafton water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0033 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Technique | 6 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 4 | 1 |
| Consumer Confidence Report Rule | Reporting | 4 | 1 |
| Revised Total Coliform Rule | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 53024 | B | 8 | 0 | Grafton Waterworks |
All ZIP Codes in Grafton
- 53024 [B] — 8 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.
Health Outcomes in Grafton
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
Top Contaminants in Grafton Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Grafton
With 50% 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
Because the majority of Grafton's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1984 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in Grafton were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Grafton Homeowners
At current valuations, Grafton sits in the low remediation-share tier — the equity impact of fixing documented issues is proportionally minor.
Remediation costs in Grafton are relatively low compared to home values. The $1,200–$3,400 estimated range is a small fraction of median property value. Home values are 53% above the Wisconsin average.
Lead Exposure Risk for Children in Grafton
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 Grafton represents 50% 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.
Flood & Climate Risk in Grafton
Within the NFIP's national dataset, Grafton falls in moderate-exposure territory — 14 documented incidents spanning multiple decades, with 100% of local ZIP codes sitting inside FEMA flood boundaries. That combination warrants inclusion in any thorough local water quality review.
Grafton has a moderate flood history with 14 FEMA claims averaging $12,078 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>$2,200</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.
Deep Dive Reports
Detailed analysis for Grafton, WI