Public water monitoring in Oracle shows a safety record well above the AZ median — health-based violations are isolated exceptions rather than recurring patterns, the city's systems have stayed compliant across recent reporting cycles, and no cluster of recurring exceedances appears in any single service area.

Data: EPA SDWIS Last verified: 2026-06-03

Overview

We track water quality and home safety data for 1 ZIP code in Oracle, Arizona (population ~5,235), covering 1 community water system serving approximately 10,585 people region-wide.

No EPA violations recorded across any ZIP codes in Oracle — an excellent indicator of water quality.

Home Safety Score

Average Home Safety Score for Oracle: B (83/100)

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

Oracle water systems draw from: Groundwater.

Lead & Copper

• Average lead level (90th percentile): 0.0020 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.

Areas with No Violations

All ZIP Codes in Oracle

• 85623 [B]

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.

Housing Age Profile

Compared to many older metro areas, Oracle carries a relatively newer housing profile — the median build year of 2008 places most of the stock in the post-1986 era when lead solder was federally banned from new plumbing. That shift meaningfully reduces the baseline likelihood of lead leaching from copper joint solder. Homes from before 1986 do still exist in the mix, however, and individual testing remains the only way to confirm what a specific tap actually delivers.

2008

Median Year Built

29%

Pre-1986 (Lead Paint Risk)

9%

Pre-1970 (Lead Pipes Risk)

Pre-1970 (9%) 1970–1986 (20%) Post-1986 (71%)

Most homes in Oracle 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.

Cost Context: What Remediation Means for Oracle Homeowners

At current valuations, Oracle sits in the low remediation-share tier — the equity impact of fixing documented issues is proportionally minor.

Median Home Value

$384,700

Est. Remediation

$400

Remediation as % of home value 0.1%

Remediation costs in Oracle are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 26% above the Arizona average.

Lead Exposure Risk for Children in Oracle

29%

Homes Built Before 1986

0.002

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 homes from the pre-rule era make up 29% of Oracle's inventory, a contained slice. Citywide aggregate readings stay below 0.015 mg/L under EPA Lead and Copper Rule monitoring, suggesting systemic lead is not a dominant local concern. What the aggregate cannot do is reflect conditions inside any single building, where interior plumbing age, water chemistry, and stagnation patterns interact differently than they do across thousands of service connections combined into one figure.

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