Sierra Csa #5, Sierra Brooks
EPA ID: CA4600009 · 726 people served · 1 ZIP code
Sierra Csa #5, Sierra Brooks carries zero EPA violations in five years — a spotless record for a utility serving 726 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Sierra Csa #5, Sierra Brooks Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Sierra Csa #5, Sierra Brooks serves a community with a median household income of $111,643 and an estimated 191 residents across its service area. Approximately 86% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Sierra Csa #5, Sierra Brooks'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 Sierra 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 Csa #5, Sierra Brooks (EPA ID: CA4600009) is a community water system in California that serves approximately 726 people from groundwater sources.
This system serves ZIP code 95936 in Downieville.
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
- 95936 — Downieville
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Sierra Csa #5, Sierra Brooks (CA4600009) on EPA.gov.
Frequently Asked Questions
Is Sierra Csa #5, Sierra Brooks water safe to drink?
Based on EPA records, Sierra Csa #5, Sierra Brooks has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Sierra Csa #5, Sierra Brooks serve?
Sierra Csa #5, Sierra Brooks serves approximately 726 people across 1 ZIP code in California.
Where does Sierra Csa #5, Sierra Brooks get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.