Mariposa Pines Mutual
EPA ID: CA2210906 · 284 people served · 1 ZIP code
Although compliance varies widely among water utilities nationally, Mariposa Pines Mutual stands out with zero EPA violations over five consecutive monitoring years, delivering safe tap water to 284 residents and showing no enforcement activity across the entire reporting span.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Mariposa Pines Mutual Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Mariposa Pines Mutual serves a community with a median household income of $64,707 and an estimated 10,164 residents across its service area. Approximately 54% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 50% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Mariposa Pines Mutual'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.
About 3% of homes in Mariposa County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
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
Mariposa Pines Mutual (EPA ID: CA2210906) is a community water system in California that serves approximately 284 people from groundwater sources.
This system serves ZIP code 95338 in Mariposa.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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
- 95338 — Mariposa
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Mariposa Pines Mutual (CA2210906) on EPA.gov.
Frequently Asked Questions
Is Mariposa Pines Mutual water safe to drink?
Based on EPA records, Mariposa Pines Mutual has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Mariposa Pines Mutual serve?
Mariposa Pines Mutual serves approximately 284 people across 1 ZIP code in California.
Where does Mariposa Pines Mutual get its water?
The primary water source is groundwater.