Placentia, CA Water Safety: 85/100 (2026)
2 ZIP codes · 5 water systems · Updated 2026-06-03
Placentia tap water earns a high safety grade — above-average compliance with CA and federal standards.
How Placentia Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Placentia Water
- Estimated remediation: $1,800 per household.
- CDC health risk index: 10.23.
Who Supplies Your Water in Placentia
Water delivery in Placentia, CA is handled by 3 utilities rather than a single system — drawn from 5 providers in federal records, each filing its own compliance reports and setting its own rates.
Overview
We track water quality and home safety data for 2 ZIP codes in Placentia, California (population ~52,384), covering 5 community water systems serving approximately 671,206 people region-wide.
No EPA violations recorded across any ZIP codes in Placentia — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Placentia: A (85/100)
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
Placentia water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Placentia
- 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): 2 ZIP codes
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 92870 | B | Yorba Linda Water District | 84,292 |
| 92871 | A | Yorba Linda Water District | 84,292 |
All ZIP Codes in Placentia
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.
Health Outcomes in Placentia
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
Cost Context: What Remediation Means for Placentia Homeowners
Given current Placentia valuations, the remediation-to-property-value ratio is low — most homeowners are looking at a proportionally modest share that fits within routine financial planning.
Remediation costs in Placentia are relatively low compared to home values. The $1,200–$2,600 estimated range is a small fraction of median property value. Home values are 18% above the California average.
Flood & Climate Risk in Placentia
Over the multi-decade window covered by the National Flood Insurance Program, Placentia has accumulated 12 claims — a total that suggests more than isolated flood exposure. With 50% of ZIP codes in designated flood zones, the water-quality implications of flooding move from hypothetical to periodically relevant: treatment intake can be compromised, wells can be infiltrated, and distribution backflow can occur.
Placentia has a moderate flood history with 12 FEMA claims averaging $4,761 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>$1,800</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 Placentia, CA