Ventura County, California
48 ZIP codes · Avg score 63/100 · Grade C
ZipCheckup grade for Ventura County: C.
A mixed picture - some signals here are worth your attention.
For Ventura County, the grade is neither top-tier nor bottom-tier; it summarizes data for 48 ZIP codes rather than measuring water at any home, and because it blends several sources, a middle result can come from very different mixes of strengths and weaknesses.
How Ventura County Compares
How Ventura County Compares
Ventura County scores 13 points below the California state average (76/100) and 10 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: Ventura County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.8 (asthma 9.5%, diabetes 11.4%)
Modeled additional annual cost estimate per homeowner: $2,365, largest modeled factor: Wildfire
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,365
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Ventura County
Modeled remediation costs in Ventura County can be compared with the median property value; actual costs vary by property.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Ventura County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Ventura County ZIP codes
8 community water systems mapped to Ventura County ZIP codes; EPA may list more systems serving the county.
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Show all 8 water systems
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47 water systems mapped to Ventura County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Ventura County
5 water systems with violations in EPA records.
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All ZIP Codes in Ventura County
48 ZIP codes tracked in Ventura County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 91307 | West Hills | 67 | C | 1 | $907K |
| 2 | 91362 | Thousand Oaks | 67 | C | 0 | $1078K |
| 3 | 91377 | Oak Park | 67 | C | 0 | $1017K |
| 4 | 92101 | San Diego | 67 | C | 0 | $741K |
| 5 | 93004 | Ventura | 67 | C | 0 | $751K |
| 6 | 93030 | Oxnard | 67 | C | 0 | $640K |
| 7 | 93035 | Oxnard | 67 | C | 0 | $747K |
| 8 | 91320 | Newbury Park | 66 | C | 1 | $918K |
| 9 | 91360 | Thousand Oaks | 66 | C | 2 | $887K |
| 10 | 91361 | Westlake Village | 66 | C | 1 | $1329K |
| 11 | 93003 | Ventura | 66 | C | 3 (1 health) | $782K |
| 12 | 93021 | Moorpark | 66 | C | 4 | $863K |
| 13 | 93033 | Oxnard | 66 | C | 1 | $549K |
| 14 | 93041 | Port Hueneme | 65 | C | 4 | $556K |
| 15 | 93063 | Simi Valley | 65 | C | 3 | $746K |
| 16 | 93065 | Simi Valley | 65 | C | 3 | $760K |
| 17 | 93022 | Oak View | 64 | C | 5 (3 health) | $705K |
| 18 | 93015 | Fillmore | 63 | C | 5 (2 health) | $590K |
| 19 | 93001 | Ventura | 61 | C | 10 (8 health) | $761K |
| 20 | 93023 | Ojai | 59 | C | 10 (4 health) | $889K |
| 21 | 93060 | Santa Paula | 59 | C | 13 (5 health) | $583K |
| 22 | 93036 | Oxnard | 56 | C | 9 (2 health) | $649K |
| 23 | 93010 | Camarillo | 50 | D | 1 | $810K |
| 24 | 93012 | Camarillo | 43 | D | 10 (4 health) | $794K |
| 25 | 91319 | Newbury Park | — | — | — | |
| 26 | 91358 | Thousand Oaks | — | — | — | |
| 27 | 93002 | Ventura | — | — | — | |
| 28 | 93005 | Ventura | — | — | — | |
| 29 | 93006 | Ventura | — | — | — | |
| 30 | 93007 | Ventura | — | — | — | |
| 31 | 93009 | Ventura | — | — | — | |
| 32 | 93011 | Camarillo | — | — | — | |
| 33 | 93016 | Fillmore | — | — | — | |
| 34 | 93020 | Moorpark | — | — | — | |
| 35 | 93024 | Ojai | — | — | — | |
| 36 | 93031 | Oxnard | — | — | — | |
| 37 | 93032 | Oxnard | — | — | — | |
| 38 | 93040 | Piru | — | — | $581K | |
| 39 | 93042 | Point Mugu Nawc | — | — | 3 | — |
| 40 | 93043 | Port Hueneme Cbc Base | — | — | 2 | — |
| 41 | 93044 | Port Hueneme | — | — | — | |
| 42 | 93061 | Santa Paula | — | — | — | |
| 43 | 93062 | Simi Valley | — | — | — | |
| 44 | 93064 | Brandeis | — | — | 3 | — |
| 45 | 93066 | Somis | — | — | 1 | $1366K |
| 46 | 93093 | Simi Valley | — | — | — | |
| 47 | 93094 | Simi Valley | — | — | — | |
| 48 | 93099 | Simi Valley | — | — | — |
Recommended Buyer Guides for Ventura County
Which guides appear depends on what the county data show.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Ventura County, California
Overview
Ventura County in California covers 48 tracked ZIP records with an average Home Safety Score of C (63/100) across 24 scored records.
22 of 28 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 17 health-based violations appear in the available health breakdown.
← Back to California Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.