Thousand Oaks, CA: 2 Violations - Home Safety 67/100
4 ZIP codes · 6 water systems · Updated
ZipCheckup grade for Thousand Oaks: C.
A mixed picture - some signals here are worth your attention.
Thousand Oaks shows moderate tap water quality for CA - some areas carry documented EPA violations while others meet standards without issues.
How Thousand Oaks Compares
Data: EPA SDWIS
Key Facts for Thousand Oaks Residents
- Your city's water systems recorded 2 violations in the past 5 years.
- Average lead level: 0.003 mg/L.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 10.81.
Thousand Oaks's Water Providers
In Thousand Oaks, CA, residential water supply is distributed across multiple utilities rather than concentrated in one. The 3 leading providers out of 6 tracked systems each control their own infrastructure, file separate EPA compliance reports, and set independent rate schedules.
- C
- C
- C
Overview
We track home safety data for 4 ZIP codes in Thousand Oaks, California (population ~78,520), covering 6 community water systems serving approximately 339,539 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 4 ZIP codes.
1 of 2 ZIP codes with a reported violation count in the available EPA record (50%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Thousand Oaks: C (67/100)
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
Thousand Oaks water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0030 mg/L (EPA action level: 0.015 mg/L)
- 0 of 2 ZIP codes with known status exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 3 ZIP codes
- Zone 2 (Moderate): 1 ZIP code
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Lead | Inorganic | 2 | 1 |
| Consumer Confidence Report Rule | Reporting | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 91360 | C | 2 | 0 | Cal American Water Company |
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 91362 | C | City of Thousand Oaks Water Department | 53,157 |
All ZIP Codes in Thousand Oaks
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.
Thousand Oaks 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
What's in Thousand Oaks's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Thousand Oaks
When remediation costs are measured against Thousand Oaks home values, the resulting ratio is in the low tier - addressing documented water and safety issues here claims only a minor fraction of typical equity, and most homeowners are in a position where the financial commitment is straightforward rather than a material burden on their household budget.
Remediation costs in Thousand Oaks are relatively low compared to home values. The $1,200–$2,400 estimated range is a small fraction of median property value. Home values are 46% above the California average.
Thousand Oaks: Lead Risk & Vulnerable Populations
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.
Lead risk in Thousand Oaks appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Thousand Oaks: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Thousand Oaks contains 45 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $10,219. 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>$1,800</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 Thousand Oaks
- 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. Filters rated for Lead can reduce the most common contaminant found in Thousand Oaks's water.
- 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 Thousand Oaks, CA