Maywood, CA Water Safety: 72/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
Looking at federal monitoring data for Maywood, 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.
How Maywood Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Maywood Water
- Homes built before 1986: 90% — older plumbing may contain lead solder.
- Estimated remediation: $1,000 per household.
- CDC health risk index: 10.71.
Who Supplies Your Water in Maywood
3 water systems are tracked federally in Maywood, CA. The top 3 providers collectively serve most residential addresses, but because they operate independently, infrastructure maintenance standards and compliance histories differ from one service zone to another.
Overview
We track water quality and home safety data for 1 ZIP code in Maywood, California, covering 3 community water systems serving approximately 24,522 people.
No EPA violations recorded across any ZIP codes in Maywood — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Maywood: 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
Maywood water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Maywood
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 90270 | B | Maywood Mutual Water Company #2 | 6,349 |
All ZIP Codes in Maywood
- 90270 [B]
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 Maywood
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
Housing & Infrastructure in Maywood
With 90% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Reading the housing age data for Maywood — median build year 1957 — the overriding implication is that the plumbing materials inside a typical home here reflect pre-1986 construction standards. In practical terms, that means lead-soldered copper joints are common across much of the housing stock. Where those materials are present, water can leach lead as it moves through joints — a pathway that corrosion control treatment under federal rules is designed to reduce, though it cannot eliminate lead risk where the plumbing materials themselves contain lead.
Over half of homes in Maywood were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Maywood Homeowners
In Maywood, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.
Remediation costs in Maywood are relatively low compared to home values. The $400–$1,600 estimated range is a small fraction of median property value. Home values are 19% below the California average.
Lead Exposure Risk for Children in Maywood
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.
Pulling a tap sample fills the gap that utility data cannot close, particularly here where 90% of housing dates from the pre-rule era and citywide monitoring sits at or above the regulatory mark in Maywood.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Maywood, CA