Looking at federal monitoring data for Long Beach, CA: the city clears benchmarks set under the Safe Drinking Water Act with room to spare — recorded exceedances are rare, and the systems serving local households have not triggered any pattern of repeat deficiencies in recent cycles.

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

Water Quality Map: Long Beach, 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 27 ZIP codes in Long Beach, California, covering 5 community water systems serving approximately 468,810 people.

27 of 27 ZIP codes (100%) have recorded EPA violations. 54 health-based violations documented.

Home Safety Score

Average Home Safety Score for Long Beach: B (72/100)

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

Long Beach water systems draw from: Groundwater, Surface water.

Lead & Copper

• Average lead level (90th percentile): 0.0031 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): 27 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 Long Beach

• 90801 [B] — 19 violations ⚠
• 90802 [B] — 19 violations ⚠
• 90803 [C] — 19 violations ⚠
• 90804 [B] — 19 violations ⚠
• 90805 [C] — 19 violations ⚠
• 90806 [B] — 19 violations ⚠
• 90807 [B] — 19 violations ⚠
• 90808 [B] — 19 violations ⚠
• 90809 [B] — 19 violations ⚠
• 90810 [B] — 19 violations ⚠
• 90813 [B] — 19 violations ⚠
• 90814 [B] — 19 violations ⚠
• 90815 [B] — 19 violations ⚠
• 90822 [B] — 19 violations ⚠
• 90831 [B] — 19 violations ⚠
• 90832 [B] — 19 violations ⚠
• 90833 [B] — 19 violations ⚠
• 90834 [B] — 19 violations ⚠
• 90835 [B] — 19 violations ⚠
• 90840 [B] — 19 violations ⚠
• 90842 [B] — 19 violations ⚠
• 90844 [B] — 19 violations ⚠
• 90846 [B] — 19 violations ⚠
• 90847 [B] — 19 violations ⚠
• 90848 [B] — 19 violations ⚠
• 90853 [B] — 19 violations ⚠
• 90899 [B] — 19 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.

How Remediation Costs Compare in Long Beach

Because property values in Long Beach comfortably exceed estimated remediation costs, the equity impact here is proportionally small.

Median Home Value

$699,800

Est. Remediation

$1,011

Remediation as % of home value 0.1%

Remediation costs in Long Beach are relatively low compared to home values. The $615–$1,685 estimated range is a small fraction of median property value. Home values are 5% below the California average.

Long Beach: Lead Risk & Vulnerable Populations

0.0031

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 Long Beach 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.

Long Beach: Flood History & Water Damage Risk

370 FEMA flood insurance claims are on file for Long Beach, and 44% of local ZIP codes fall within federally designated flood zones — enough to put flood exposure on the planning radar, though short of the concentrated-risk threshold where treatment-system vulnerability becomes a primary consideration.

370

Total FEMA Flood Claims

$20,377

Avg Claim Payout

44%

ZIPs in FEMA Flood Zones

~19

Est. Claims/Year

Long Beach has a moderate flood history with 370 FEMA claims averaging $20,377 per payout. 44% 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>$1,011</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.