Altadena, CA Home Safety: Home Safety 58/100
2 ZIP codes · 4 water systems · Updated
ZipCheckup grade for Altadena: C.
A mixed picture - some signals here are worth your attention.
Across water systems in Altadena, safety results are uneven - a portion carry active or recent violations, while others meet federal standards without incident, placing the city in the middle tier for CA.
How Altadena Compares
Data: EPA SDWIS
Key Facts for Altadena Residents
- Estimated remediation: $1,600 per household.
- CDC health risk index: 10.71.
Altadena's Water Providers
Residential water in Altadena, CA is supplied by 3 separate utilities - not one centralized authority. Each of those providers operates under its own service territory boundary, maintains its own distribution infrastructure, and files compliance documentation with the EPA on its own timeline. Federal data counts 4 water systems in the area, with these providers collectively accounting for the dominant share of household connections.
- C
- C
- C
Overview
We track home safety data for 2 ZIP codes in Altadena, California (population ~36,402), covering 4 community water systems serving approximately 194,494 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 2 ZIP codes.
The available EPA record reports 0 violations for 1 ZIP code with a reported violation count.
Home Safety Score
Average Home Safety Score for Altadena: C (58/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Altadena water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0000 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 2 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
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 91001 | C | Lincoln Avenue Water Company | 16,088 |
All ZIP Codes in Altadena
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Altadena Community Health Snapshot
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 Remediation Costs Compare in Altadena
Placing remediation in the context of Altadena's property market, the equity share is low - most homeowners here are weighing a financial commitment that fits comfortably within routine property planning, far from the threshold where remediation becomes a material equity decision rather than a standard upkeep consideration.
Remediation costs in Altadena are relatively low compared to home values. The $800–$2,500 estimated range is a small fraction of median property value. Home values are 47% above the California average.
Altadena: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Altadena contains 35 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $2,474. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The <strong>$1,600</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Altadena
- Test your water at home. City-level data shows averages - your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Altadena, CA