Dublin San Ramon Services District
EPA ID: CA0110009 · 98,776 people served · 6 ZIP codes
ZipCheckup's reading of EPA SDWIS for Dublin San Ramon Services District (CA0110009): no EPA violations recorded in the last five years. For the full five-year period covered by EPA monitoring, Dublin San Ramon Services District has supplied tap water to 98,776 residents with no violations of any type on record.
Data: EPA SDWIS
Service Area Map
Coverage area for Dublin San Ramon Services District Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Dublin San Ramon Services District serves a community with a median household income of $205,108 and an estimated 232,506 residents across its service area.
🌊 Where Does Your Water Come From?
Dublin San Ramon Services District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 18 detections recorded. 5 exceed federal EPA limits (4 ppt for PFOA/PFOS). 2 exceed state limits.
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
Dublin San Ramon Services District (EPA ID: CA0110009) is a community water system in California that serves approximately 98,776 people from surface water sources.
This system provides water to 6 ZIP codes across 6 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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
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.
- 94506 - Danville
- 94551 - Livermore
- 94552 - Castro Valley
- 94568 - Dublin
- 94582 - San Ramon
- 94588 - Pleasanton
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Dublin San Ramon Services District (CA0110009) on EPA.gov.
Frequently Asked Questions
Is Dublin San Ramon Services District water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Dublin San Ramon Services District 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 Dublin San Ramon Services District serve?
Dublin San Ramon Services District serves approximately 98,776 people across 6 ZIP codes in California.
Where does Dublin San Ramon Services District get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Dublin San Ramon Services District, CA: Serves 99K People. https://zipcheckup.com/water-system/ca0110009/
@misc{zipcheckup-water-system-ca0110009,
author = {{ZipCheckup}},
title = {{Dublin San Ramon Services District, CA: Serves 99K People}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca0110009/}
}