Trinity Knolls Mutual Water Company
EPA ID: CA5301102 · 338 people served · 1 ZIP code
Trinity Knolls Mutual Water Company earns a clean bill from EPA monitoring — no violations in five years across a service area of 338 people.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Trinity Knolls Mutual Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Trinity Knolls Mutual Water Company serves a community with a median household income of $59,432 and an estimated 761 residents across its service area. Approximately 58% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 60% 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?
Trinity Knolls 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 3% of homes in Trinity 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
Trinity Knolls Mutual Water Company (EPA ID: CA5301102) is a community water system in California that serves approximately 338 people from groundwater sources.
This system serves ZIP code 96091 in Trinity Center.
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
- 96091 — Trinity Center
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Trinity Knolls Mutual Water Company (CA5301102) on EPA.gov.
Frequently Asked Questions
Is Trinity Knolls Mutual Water Company water safe to drink?
Based on EPA records, Trinity Knolls Mutual Water Company has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Trinity Knolls Mutual Water Company serve?
Trinity Knolls Mutual Water Company serves approximately 338 people across 1 ZIP code in California.
Where does Trinity Knolls Mutual Water Company get its water?
The primary water source is groundwater.