Hollister Ranch Estates
EPA ID: CA3500904 · 150 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Hollister Ranch Estates (CA3500904): 1 EPA violation in the last five years. Since the flagged events, Hollister Ranch Estates resolved all 1 violation - compliant today, 150 residents served.
Data: EPA SDWIS
Service Area Map
Coverage area for Hollister Ranch Estates Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Hollister Ranch Estates serves a community with a median household income of $108,156 and an estimated 58,374 residents across its service area. Approximately 47% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Hollister Ranch Estates's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Detected Contaminants
How Hollister Ranch Estates compares to EPA limits
What This Means For You
Lead at 1 mg/L (action level) exceeds the EPA maximum of 0.015 mg/L (action level). Brain damage in children, kidney & blood pressure in adults. Consider reverse osmosis filtration.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 1 detection recorded. 1 exceeds federal EPA limits (4 ppt for PFOA/PFOS).
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
Similar-sized systems in California
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Hollister Ranch Estates (EPA ID: CA3500904) is a community water system in California that serves approximately 150 people from groundwater sources.
This system serves ZIP code 95023 in Hollister.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| April 1, 2023 | Lead | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead | Inorganic | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CA or modeled from parcel and building-footprint data.
- 95023 - Hollister
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Hollister Ranch Estates (CA3500904) on EPA.gov.
Frequently Asked Questions
Is Hollister Ranch Estates water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Hollister Ranch Estates; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Hollister Ranch Estates serve?
Hollister Ranch Estates serves approximately 150 people across 1 ZIP code in California.
Where does Hollister Ranch Estates get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Hollister Ranch Estates (CA): 1 EPA Violation. https://zipcheckup.com/water-system/ca3500904/
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author = {{ZipCheckup}},
title = {{Hollister Ranch Estates (CA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca3500904/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Hollister Ranch Estates (EPA ID: CA3500904) - request the latest Consumer Confidence Report or ask about specific contaminants.