Water systems serving Sun City hold a strong EPA compliance record - the city places among the better-performing areas in AZ with few health-based violations on file.

Data: EPA SDWIS

Overview

We track home safety data for 3 ZIP codes in Sun City, Arizona (population ~48,447), covering 3 community water systems serving approximately 240,415 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 3 ZIP codes.

2 of 2 ZIP codes 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 Sun City: B (70/100)

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

Sun City water systems draw from: Groundwater, Surface water.

Lead & Copper

• Average lead level (90th percentile): 0.0000 mg/L (EPA action level: 0.015 mg/L)
• 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

Dominant radon zone: Zone 2 (Moderate Risk)

• Zone 1 (High): 0 ZIP codes
• Zone 2 (Moderate): 3 ZIP codes
• Zone 3 (Low): 0 ZIP codes

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

Top Contaminants

Areas with Most Violations

All ZIP Codes in Sun City

• 85351 [B] - 8 violations
• 85372
• 85373 [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

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

Housing Age Profile

Federal plumbing rules changed in two stages - lead pipes were phased out before 1970, and lead solder was banned in 1986 - but in Sun City, where the median build year is 1974, most of the housing was already in place before those rules took effect. The materials installed under older standards remain embedded in a substantial portion of the residential inventory today.

1974

Median Year Built

75%

Pre-1986 (Lead Paint Risk)

2%

Pre-1970 (Lead Pipes Risk)

Pre-1970 (2%) 1970–1986 (73%) Post-1986 (25%)

Over half of homes in Sun City 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 Sun City Homeowners

Within the Sun City market, estimated remediation claims a small portion of typical property equity - the financial burden is proportionally low.

Median Home Value

$317,100

Est. Remediation

$1,400

Remediation as % of home value 0.4%

Remediation costs in Sun City are relatively low compared to home values. The $667–$2,233 estimated range is a small fraction of median property value. Home values are 4% above the Arizona average.

Lead Exposure Risk for Children in Sun City

75%

Homes Built Before 1986

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.

Wherever 75% of local housing was built before solder rules changed - as is the case in Sun City - a faucet-level sample closes the gap that aggregate utility data cannot.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Historical NFIP Claim Context in Sun City

3

Total FEMA Flood Claims

$5,071

Avg Reported Sum With Payment Data

Historical NFIP data for Sun City contains 3 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $5,071.

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>$1,400</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.