In recent monitoring cycles, San Pedro tap water shows a mixed record for CA — several systems have documented violations alongside areas with clean compliance histories.

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

Overview

We track water quality and home safety data for 4 ZIP codes in San Pedro, California (population ~85,556), covering 1 community water system serving approximately 3,875,566 people region-wide.

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

Home Safety Score

Average Home Safety Score for San Pedro: C (58/100)

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

San Pedro water systems draw from: Surface water.

Lead & Copper

• Lead data: not yet available for San Pedro
• 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): 4 ZIP codes
• Zone 3 (Low): 0 ZIP codes

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

Areas with No Violations

All ZIP Codes in San Pedro

• 90731 [C]
• 90732 [C]
• 90733 [D]
• 90734 [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.

San Pedro: Remediation Cost in Perspective

Remediation costs in San Pedro are small relative to typical property values — the cost-to-value ratio here is favorable.

Median Home Value

$808,800

Est. Remediation

$1,000

Remediation as % of home value 0.1%

Remediation costs in San Pedro are relatively low compared to home values. The $400–$1,700 estimated range is a small fraction of median property value. Home values are 10% above the California average.

Climate-Related Water Risk for San Pedro

FEMA data shows 50% of San Pedro's ZIP codes mapped into designated flood zones, paired with an NFIP record of 14 claims. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.

14

Total FEMA Flood Claims

$8,122

Avg Claim Payout

50%

ZIPs in FEMA Flood Zones

~1

Est. Claims/Year

San Pedro has a moderate flood history with 14 FEMA claims averaging $8,122 per payout. 50% 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>$1,000</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.