San Justo Mutual Water Company
EPA ID: CA3500550 · 160 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for San Justo Mutual Water Company (CA3500550): 2 unresolved EPA violations on record. Not yet resolved: 2 EPA violations at San Justo Mutual Water Company, affecting about 160 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for San Justo Mutual Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The San Justo Mutual Water Company serves a community with a median household income of $106,377 and an estimated 4,291 residents across its service area. 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 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 San Justo Mutual Water Company compares to EPA limits
What This Means For You
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
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 | Stage 2 DBP Rule | Non-health-based | Unaddressed (current) |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unaddressed (current) |
| July 1, 2021 | Surface Water Treatment 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 |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Surface Water Treatment Rule | Treatment Failure | 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.
- 95045 - San Juan Bautista
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record 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
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
San Justo Mutual Water Company (EPA ID: CA3500550) - request the latest Consumer Confidence Report or ask about specific contaminants.