Unlike many cities its size in CA, Anaheim keeps health-based violation rates low — systems here score at or above the state average for tap water safety, with no systemic concerns flagged in the current data set.

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

Water Quality Map: Anaheim, CA

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Overview

We track water quality and home safety data for 17 ZIP codes in Anaheim, California (population ~361,314), covering 10 community water systems serving approximately 1,232,477 people region-wide.

17 of 17 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.

Home Safety Score

Average Home Safety Score for Anaheim: A (96/100)

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

Anaheim water systems draw from: Groundwater, Surface water.

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 3 (Low Risk)

• Zone 1 (High): 0 ZIP codes
• Zone 2 (Moderate): 0 ZIP codes
• Zone 3 (Low): 17 ZIP codes

Top Contaminants

Areas with Most Violations

All ZIP Codes in Anaheim

• 92801 [A] — 2 violations
• 92802 [A] — 2 violations
• 92803 [A] — 2 violations
• 92804 [A] — 2 violations
• 92805 [A] — 2 violations
• 92806 [A] — 2 violations
• 92807 [A] — 2 violations
• 92808 [A] — 2 violations
• 92809 [A] — 2 violations
• 92812 [A] — 2 violations
• 92814 [A] — 2 violations
• 92815 [A] — 2 violations
• 92816 [A] — 2 violations
• 92817 [A] — 2 violations
• 92825 [A] — 2 violations
• 92850 [A] — 2 violations
• 92899 [A] — 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

Updated daily.

Cost Context: What Remediation Means for Anaheim Homeowners

In Anaheim, the equity impact of remediation is proportionally small — not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.

Median Home Value

$729,700

Est. Remediation

$1,188

Remediation as % of home value 0.2%

Remediation costs in Anaheim are relatively low compared to home values. The $541–$1,912 estimated range is a small fraction of median property value. Home values are 1% below the California average.

Lead Exposure Risk for Children in Anaheim

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.

Lead risk in Anaheim appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.

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

Flood & Climate Risk in Anaheim

The NFIP claim record for Anaheim — 59 filed incidents — reflects genuine, recurring flood exposure rather than an isolated event or two. When a community accumulates flood claims at this volume and carries 41% of its ZIP codes inside FEMA-designated zones, flood history starts to factor into water quality planning in ways it doesn't for lower-exposure areas. Flooding introduces specific contamination pathways — runoff overwhelming treatment facility intake, surface water infiltrating private wells, and pressure disruptions in distribution systems allowing backflow — all of which become more relevant as flood frequency increases.

59

Total FEMA Flood Claims

$2,404

Avg Claim Payout

41%

ZIPs in FEMA Flood Zones

~3

Est. Claims/Year

Anaheim has a moderate flood history with 59 FEMA claims averaging $2,404 per payout. 41% 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>$1,188</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.