Drilling into federal monitoring figures for Grafton in WI, the pattern is middle-of-the-road - some utilities have documented MCL exceedances or treatment technique violations in recent years, while others have operated without a single flag, making the city's grade a genuine average rather than a rounded-down high.

Data: EPA SDWIS

Overview

We track home safety data for 1 ZIP code in Grafton, Wisconsin (population ~19,040), covering 4 community water systems serving approximately 41,890 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.

Home Safety Score

Average Home Safety Score for Grafton: C (67/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor	What It Measures
Water Quality	EPA violations and compliance history
PFAS MCL Screen	UCMR 5 testing against the covered federal MCLs
Radon Risk	EPA radon zone classification
Annual AQI	EPA AirData county-year median with at least 90 observed days

Water Sources

Grafton water systems draw from: Groundwater, Surface water.

Lead & Copper

• Average lead level (90th percentile): 0.0076 mg/L (EPA action level: 0.015 mg/L)
• 0 of 1 ZIP code with known status 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

Areas with Most Violations

All ZIP Codes in Grafton

• 53024 [C] - 2 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

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

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.

1984

Median Year Built

50%

Pre-1986 (Lead Paint Risk)

20%

Pre-1970 (Lead Pipes Risk)

Pre-1970 (20%) 1970–1986 (30%) Post-1986 (50%)

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.

Median Home Value

$353,700

Est. Remediation

$2,200

Remediation as % of home value 0.6%

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

50%

Homes Built Before 1986

0.0076

mg/L Avg Lead (Limit: 0.015)

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.

Historical NFIP Claim Context in Grafton

14

Total FEMA Flood Claims

$18,789

Avg Reported Sum With Payment Data

100%

A/V Share of Claim-Record ZIPs

Historical NFIP data for Grafton contains 14 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $18,789. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

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. The <strong>$2,200</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.