Sierra Bella Mutual Water Company
EPA ID: CA1500341 · 60 people served · 1 ZIP code
Five years of EPA monitoring have produced no violations for Sierra Bella Mutual Water Company — the supplier serving 60 residents has kept every contaminant level within federal limits, a result that places it among the top-performing utilities for systems with a service population of comparable size.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 1 (2023) to 6 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Sierra Bella Mutual Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Sierra Bella Mutual Water Company serves a community with a median household income of $39,844 and an estimated 2,415 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 67% 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?
Sierra Bella 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.
About 1% of homes in Kern 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
Sierra Bella Mutual Water Company (EPA ID: CA1500341) is a community water system in California that serves approximately 60 people from groundwater sources.
This system serves ZIP code 93285 in Wofford Heights.
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
- 93285 — Wofford Heights
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Sierra Bella Mutual Water Company (CA1500341) on EPA.gov.
Frequently Asked Questions
Is Sierra Bella Mutual Water Company water safe to drink?
Based on EPA records, Sierra Bella Mutual Water Company has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Sierra Bella Mutual Water Company serve?
Sierra Bella Mutual Water Company serves approximately 60 people across 1 ZIP code in California.
Where does Sierra Bella Mutual Water Company get its water?
The primary water source is groundwater.