San Justo Mutual Water Company
EPA ID: CA3500550 · 160 people served · 1 ZIP code
ZipCheckup's reading of EPA records for San Justo Mutual Water Company (CA3500550): 2 violations recorded with unresolved status in the SDWIS data used. In the federal compliance data used here, San Justo Mutual Water Company has 2 violations listed as open; the utility serves approximately 160 people.
Data: EPA SDWIS
Service Area Map
Coverage area for San Justo Mutual Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with San Justo Mutual Water Company have a median household income of $106,377 and about 4,291 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 52% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
San Justo Mutual Water Company's water is classified in EPA records as a groundwater source. 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
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
San Justo Mutual Water Company (EPA ID: CA3500550) is a community water system in California that serves approximately 160 people from groundwater sources.
This system serves ZIP code 95045 in San Juan Bautista.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 2 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 |
|---|---|---|---|
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Unaddressed (current) |
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Health-based | Unaddressed (current) |
| July 1, 2021 | Consumer Confidence Rule | 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 AND COPPER RULE REVISIONS | Treatment Technique, Monitoring & Reporting | 2 | Yes |
| Consumer Confidence Rule | Other (notice or report rule) | 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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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.
- 95045 - San Juan Bautista
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for San Justo Mutual Water Company (CA3500550) on EPA.gov.
Frequently Asked Questions
Is San Justo Mutual Water Company water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current health-based noncompliance record for San Justo Mutual Water Company. Review the utility's current notices and EPA record. This system-level compliance history cannot determine conditions at a specific tap.
How many people does San Justo Mutual Water Company serve?
San Justo Mutual Water Company serves approximately 160 people across 1 ZIP code in California.
Where does San Justo Mutual Water Company get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). San Justo Mutual Water Company (CA): 1 Health Violation. https://zipcheckup.com/water-system/ca3500550/
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author = {{ZipCheckup}},
title = {{San Justo Mutual Water Company (CA): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca3500550/}
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What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
San Justo Mutual Water Company (EPA ID: CA3500550) - request the latest Consumer Confidence Report or ask about specific contaminants.