Gilbert, AZ: 28 Health Violations — 70/100 (2026)
7 ZIP codes · 10 water systems · Updated 2026-06-03
Compared to statewide averages in AZ, Gilbert scores well — health violations are below the norm and systems generally operate within federal standards.
How Gilbert Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Gilbert, AZ
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Gilbert's 7 ZIP codes.
Key Facts for Gilbert Residents
- Your city's water systems recorded 357 violations in the past 5 years.
- Average lead level: 0.0003 mg/L.
- Homes built before 1986: 10% — older plumbing may contain lead solder.
- Estimated remediation: $2,629 per household.
- CDC health risk index: 11.3.
Gilbert's Water Providers
Residential addresses in Gilbert, AZ are served by 3 primary water providers out of 10 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 7 ZIP codes in Gilbert, Arizona (population ~272,707), covering 10 community water systems serving approximately 1,059,836 people region-wide.
7 of 7 ZIP codes (100%) have recorded EPA violations. 28 health-based violations documented.
Home Safety Score
Average Home Safety Score for Gilbert: B (70/100)
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
Gilbert water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0003 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)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 7 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Chlorite | Disinfection Byproducts | 64 | 7 |
| Consumer Confidence Report Rule | Reporting | 56 | 7 |
| Fecal Coliform | Microbiological | 48 | 7 |
| Barium | Inorganic | 40 | 7 |
| E. coli | Microbiological | 40 | 7 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 85233 | B | 51 | 4 | Gilbert, Town of |
| 85234 | B | 51 | 4 | Gilbert, Town of |
| 85295 | B | 51 | 4 | Gilbert, Town of |
| 85296 | B | 51 | 4 | Gilbert, Town of |
| 85297 | B | 51 | 4 | Gilbert, Town of |
| 85298 | B | 51 | 4 | Gilbert, Town of |
| 85299 | C | 51 | 4 | Gilbert, Town of |
All ZIP Codes in Gilbert
- 85233 [B] — 51 violations ⚠
- 85234 [B] — 51 violations ⚠
- 85295 [B] — 51 violations ⚠
- 85296 [B] — 51 violations ⚠
- 85297 [B] — 51 violations ⚠
- 85298 [B] — 51 violations ⚠
- 85299 [C] — 51 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.
Gilbert Community Health Snapshot
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
What's in Gilbert's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Gilbert Infrastructure Age
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Why does housing age matter for water safety? Homes built before 1986 may have lead-soldered copper plumbing joints — a practice banned that year. Gilbert's median build year of 2002 places much of the city's housing in the post-ban era, reducing that specific risk pathway for most residents.
Most homes in Gilbert 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.
How Remediation Costs Compare in Gilbert
Within the Gilbert market, estimated remediation claims a small portion of typical property equity — the financial burden is proportionally low.
Remediation costs in Gilbert are relatively low compared to home values. The $1,386–$4,643 estimated range is a small fraction of median property value. Home values are 73% above the Arizona average.
Gilbert: Lead Risk & Vulnerable Populations
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.
Where pre-rule stock represents a smaller fraction of the inventory — 10% across Gilbert — the structural drivers of household exposure run thinner. Aggregate readings under the federal benchmark reinforce that picture, with one-home draws remaining the only direct measurement for a specific address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Gilbert: Flood History & Water Damage Risk
Flood exposure in Gilbert is meaningful by NFIP measures — 21 claims on record and 86% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Gilbert has a moderate flood history with 21 FEMA claims averaging $5,376 per payout. 86% 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>$2,629</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 Gilbert, AZ