Round Rock, AZ Water Safety: 53/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
State safety rankings put Round Rock, AZ near the lower tier — below-average compliance on record.
How Round Rock Compares
Data: EPA SDWIS Last verified: 2026-06-03
Round Rock Water: The Quick Version
- Homes built before 1986: 41% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 16.06 — above typical levels.
Water Systems Serving Round Rock
A single utility carries the primary residential water load in Round Rock, AZ — the dominant provider across 1 federally tracked system.
Overview
We track water quality and home safety data for 1 ZIP code in Round Rock, Arizona, covering 1 community water system serving approximately 918 people.
No EPA violations recorded across any ZIP codes in Round Rock — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Round Rock: D (53/100)
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
Round Rock water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Round Rock
- 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
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 86547 | D | SANDERS SCHOOL DISTRICT | 350 |
All ZIP Codes in Round Rock
- 86547 [D]
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.
CDC Health Data for Round Rock
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
How Old Is Round Rock's Housing Stock?
With 41% 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
Development in Round Rock unfolded across multiple decades, and the median build year of 1981 reflects a housing inventory where eras of construction are genuinely mixed — including portions that predate the federal prohibition on lead solder in plumbing.
Most homes in Round Rock 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.
Round Rock: Remediation Cost in Perspective
In Round Rock, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.
Remediation costs in Round Rock are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 84% below the Arizona average.
Protecting Children from Lead in Round Rock
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.
Locally, 41% of Round Rock homes carry interior plumbing from the era when lead solder was still permitted in new builds, and citywide monitoring approaches or crosses the EPA action benchmark. Households can find a draw-test kit and certified filtration through verified retailers.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Round Rock
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 41% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Round Rock, AZ