ZipCheckup grade for 91361: C.
A mixed picture - some signals here are worth your attention.
Your top priority: have older plumbing checked for lead solder. Check your ZIP → EPA: reduce lead
Westlake Village, CA (91361): 1 Violation Recorded for Mapped Water Systems - 66/100
EPA data combined for 5 water systems mapped to this ZIP (largest mapped system: California Water Service Company - Westlake)
EPA records for the water systems mapped to 91361 in Westlake Village, CA contain 1 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 1 violation (non-health) (since 2021).
- Lead The reported 90th-percentile lead result of 0.003 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
- Flood 35 cumulative NFIP claim records. Check the current FEMA map for a specific address.
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Score Breakdown
Overall Home Safety Score: 66/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (6) HIGH
Your Water System
ZIP code 91361 in Westlake Village, California is mapped to the water system California Water Service Company - Westlake (EPA ID: CA5610016). This system provides water to approximately 19,533 people from surface water sources.
There are 5 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| California Water Service Company - Westlake | CA5610016 | 19,533 | Surface water |
| Las Virgenes Mwd | CA1910225 | 72,602 | Surface water |
| City of Thousand Oaks Water Department | CA5610020 | 53,157 | Surface water |
| Cal American Water Company | CA5610040 | 66,809 | Surface water |
| Ventura Cwwd No. 38 - Lake Sherwood | CA5610069 | 1,759 | Surface water |
Other Water Quality Reports in California
- 90001 (Los Angeles)
- 90002 (Los Angeles)
- 90003 (Los Angeles)
- 90004 (Los Angeles)
- 90005 (Los Angeles)
- 90006 (Los Angeles)
- 90007 (Los Angeles)
- 90008 (Los Angeles)
- 90009 (Los Angeles)
- 90010 (Los Angeles)
- 90011 (Los Angeles)
- 90012 (Los Angeles)
- 90013 (Los Angeles)
- 90014 (Los Angeles)
- 90015 (Los Angeles)
- 90016 (Los Angeles)
- 90017 (Los Angeles)
- 90018 (Los Angeles)
- 90019 (Los Angeles)
- 90020 (Los Angeles)
Nearby Water Quality Reports
- 91358 (Thousand Oaks) - 2 mi
- 91359 (Westlake Village) - 2 mi
- 91363 (Thousand Oaks) - 2 mi
- 91362 (Thousand Oaks) - 3 mi
- 91376 (Agoura Hills) - 4 mi
- 91360 (Thousand Oaks) - 5 mi - 2 violations recorded for mapped water systems
- 91377 (Oak Park) - 5 mi
- 91319 (Newbury Park) - 5 mi
- 91301 (Agoura Hills) - 5 mi
- 91320 (Newbury Park) - 6 mi - 1 violation recorded for mapped water systems
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for California Water Service Company - Westlake (CA5610016) on EPA.gov.
5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
UCMR 5 PFAS monitoring: no reportable detections in available records
Available federal UCMR5 records for water systems mapped to ZIP code 91361 show no PFAS detections among the compounds tested, at the program's reporting levels.
The EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5) required community and non-transient non-community water systems serving 3,300 or more people to test for 29 PFAS compounds and lithium between 2023 and 2025. Systems with no detections at the federal minimum reporting level had no results at or above that reporting level.
Environmental Hazards (11) HIGH
Home & Infrastructure (6) OK
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Westlake Village
Based on local data for ZIP 91361, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Home & Flood Insurance
The ZIP code for this report in Westlake Village has 35 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.
Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote
Check Your Flood Zone (Free)FEMA flood map lookup - see if your property is in a flood zone
Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)
Gutter Installation & Repair
The median home in 91361 was built around 1974. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsWindow Replacement
The median build year of homes in Westlake Village is 1974; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.
Typical cost: Window replacement: typically $300–$800 per window installed
Estimate Your Home Maintenance CostsRoofing Inspection & Repair
Homes built around 1974 may be on their second or third roof. A professional inspection can catch damage before leaks start.
Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500
Estimate Your Home Insurance NeedsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 91361 safe to drink?
EPA SDWIS records 1 violation since 2021 across the water systems mapped to ZIP 91361 (primary system: California Water Service Company - Westlake), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 91361's water come from?
The recorded water source for California Water Service Company - Westlake, a system mapped to ZIP code 91361, is Surface water. This system serves approximately 19,533 people.
How does Westlake Village water compare to the national average?
Westlake Village's Home Safety Score ranks lower than 71% of U.S. ZIP codes, and lower than 79% of ZIP codes within California.
How can I get my water tested in Westlake Village?
If California Water Service Company - Westlake supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
Is lead a concern in 91361 tap water?
The Lead and Copper Rule record selected for 91361 reports a 90th-percentile lead result of 0.003 mg/L for a water system mapped to this ZIP (record date 2024-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.
What is the radon risk for 91361?
91361 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Ventura County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
What does the NFIP claim history show for ZIP 91361?
FEMA records contain 35 flood insurance claims filed in ZIP code 91361; the recorded rated-zone value (the most frequent one if there are several claims) is C, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Westlake Village, CA (91361): 1 Violation Recorded for Mapped Water Systems - 66/100. https://zipcheckup.com/report/91361/
@misc{zipcheckup-report-91361,
author = {{ZipCheckup}},
title = {{Westlake Village, CA (91361): 1 Violation Recorded for Mapped Water Systems - 66/100}},
year = {2026},
url = {https://zipcheckup.com/report/91361/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 91361
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 91358 | Thousand Oaks, CA | 1.6 mi | N/A | 0 |
| 91359 | Westlake Village, CA | 1.9 mi | N/A | 0 |
| 91363 | Thousand Oaks, CA | 2.2 mi | N/A | 0 |
| 91362 | Thousand Oaks, CA | 3.4 mi | C | 0 |
| 91376 | Agoura Hills, CA | 3.7 mi | N/A | 0 |
| 91360 | Thousand Oaks, CA | 4.7 mi | C | 2 |
| 91377 | Oak Park, CA | 4.8 mi | C | 0 |
| 91319 | Newbury Park, CA | 4.9 mi | N/A | 0 |
| 91301 | Agoura Hills, CA | 4.9 mi | B | 0 |
| 91320 | Newbury Park, CA | 6.0 mi | C | 1 |
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