Rancho Cordova, CA Water Safety: 98/100 (2026)
3 ZIP codes · 8 water systems · Updated 2026-06-03
Water systems serving Rancho Cordova hold a strong EPA compliance record — the city places among the better-performing areas in CA with few health-based violations on file.
How Rancho Cordova Compares
Data: EPA SDWIS Last verified: 2026-06-03
Rancho Cordova Water: The Quick Version
- Average lead level: 0.0014 mg/L.
- Homes built before 1986: 35% — older plumbing may contain lead solder.
- Estimated remediation: $1,000 per household.
- CDC health risk index: 11.31.
Water Systems Serving Rancho Cordova
Water delivery in Rancho Cordova, CA is handled by 3 utilities rather than a single system — drawn from 8 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 3 ZIP codes in Rancho Cordova, California (population ~75,601), covering 8 community water systems serving approximately 446,980 people region-wide.
No EPA violations recorded across any ZIP codes in Rancho Cordova — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Rancho Cordova: A (98/100)
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
Rancho Cordova water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0014 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): 3 ZIP codes
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 95670 | A | Golden State Water Company - Cordova | 47,161 |
| 95741 | A | Golden State Water Company - Cordova | 47,161 |
| 95742 | A | Golden State Water Company - Cordova | 47,161 |
All ZIP Codes in Rancho Cordova
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.
CDC Health Data for Rancho Cordova
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
How Old Is Rancho Cordova's Housing Stock?
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
With a median build year of 1987, Rancho Cordova's housing stock reflects a city built across multiple eras. A substantial share of homes predate 1986 — the year lead solder in plumbing was federally banned — meaning the risk from plumbing materials is unevenly distributed across the city's neighborhoods and property types.
Most homes in Rancho Cordova 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.
Rancho Cordova: Remediation Cost in Perspective
Equity impact data for Rancho Cordova lands in the favorable tier — remediation claims a small slice of what properties here are worth.
Remediation costs in Rancho Cordova are relatively low compared to home values. The $400–$1,667 estimated range is a small fraction of median property value. Home values are 17% below the California average.
Protecting Children from Lead in Rancho Cordova
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.
Routinely in Rancho Cordova, where 35% of housing predates the solder ban and aggregate utility readings hover near the federal threshold, a faucet-level draw functions as a standard household step for families with small kids.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Rancho Cordova
Within the NFIP's national dataset, Rancho Cordova falls in moderate-exposure territory — 5 documented incidents spanning multiple decades, with 33% of local ZIP codes sitting inside FEMA flood boundaries. That combination warrants inclusion in any thorough local water quality review.
Rancho Cordova has a moderate flood history with 5 FEMA claims averaging $1,383 per payout. 33% 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.
Deep Dive Reports
Detailed analysis for Rancho Cordova, CA