Rancho Robles Mutual Water Company
EPA ID: CA4300577 · 103 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Rancho Robles Mutual Water Company (CA4300577): no EPA violations recorded in the last five years. Federal monitoring records confirm Rancho Robles Mutual Water Company has operated without any EPA violations for the full five-year window - covering every contaminant category and reporting cycle across a service area of approximately 103 residents, with no gaps in the compliance record.
Data: EPA SDWIS
Service Area Map
Coverage area for Rancho Robles Mutual Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Rancho Robles Mutual Water Company serves a community with a median household income of $157,458 and an estimated 6,766 residents across its service area. Approximately 76% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Rancho Robles 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.
Superfund Proximity Note: This service area ranks in the 80th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
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
Rancho Robles Mutual Water Company (EPA ID: CA4300577) is a community water system in California that serves approximately 103 people from groundwater sources.
This system serves ZIP code 95046 in San Martin.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0014 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.
- 95046 - San Martin
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Rancho Robles Mutual Water Company (CA4300577) on EPA.gov.
Frequently Asked Questions
Is Rancho Robles Mutual Water Company water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Rancho Robles Mutual Water Company in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Rancho Robles Mutual Water Company serve?
Rancho Robles Mutual Water Company serves approximately 103 people across 1 ZIP code in California.
Where does Rancho Robles Mutual Water Company get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Rancho Robles Mutual Water Company Water Quality Report, CA. https://zipcheckup.com/water-system/ca4300577/
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