Northstar Csd - Martis Valley
EPA ID: CA3110051 · 4,493 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Northstar Csd - Martis Valley (CA3110051): no drinking-water violations recorded since 2021. Searching the federal compliance records for Northstar Csd - Martis Valley turns up no EPA violations in any contaminant category the file covers; the utility's service area includes approximately 4,493 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Northstar Csd - Martis Valley Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Northstar Csd - Martis Valley have a median household income of $128,535 and about 19,231 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 43% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Northstar Csd - Martis Valley's water is classified in EPA records as a groundwater source. 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 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 3 detections recorded. 1 detection is above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
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
Northstar Csd - Martis Valley (EPA ID: CA3110051) is a community water system in California that serves approximately 4,493 people from groundwater sources.
This system serves ZIP code 96161 in Truckee.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0008 mg/L | No | 2023-12-31 |
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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.
- 96161 - Truckee
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Northstar Csd - Martis Valley (CA3110051) on EPA.gov.
Frequently Asked Questions
Is Northstar Csd - Martis Valley water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Northstar Csd - Martis Valley 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 Northstar Csd - Martis Valley serve?
Northstar Csd - Martis Valley serves approximately 4,493 people across 1 ZIP code in California.
Where does Northstar Csd - Martis Valley get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Northstar Csd - Martis Valley Water Quality Report, CA. https://zipcheckup.com/water-system/ca3110051/
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title = {{Northstar Csd - Martis Valley Water Quality Report, CA}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca3110051/}
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