Is San Ramon, CA Tap Water Safe to Drink?
San Ramon, CA tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Contaminants including lithium have been detected at or below guideline thresholds.
Where Does San Ramon Get Its Water?
Water in San Ramon, CA is provided by 2 public water systems: DUBLIN SAN RAMON SERVICES DISTRICT and EAST BAY MUD.
How Is San Ramon Tap Water Treated?
Treated water is disinfected using calcium hypochlorite and free chlorine and ozone. Treatment includes air stripping, conventional treatment (coagulation, flocculation, and filtration), groundwater disinfection, ion exchange, in-line filtration and post-ozone biofiltration.
What's in San Ramon Tap Water?
The following contaminants were detected most frequently in San Ramon public water systems. All detected levels fall at or below EPA health guidelines in this dataset.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| lithium | 9 µg/L | — | 0 ZIPs | Within guideline |
| PFTrDA | 0.007 µg/L | 0.007 µg/L | 2 ZIPs | Within guideline |
| 6:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| PFBA | 0.005 µg/L | — | 0 ZIPs | Within guideline |
| 8:2 FTS | 0.005 µg/L | — | 0 ZIPs | Within guideline |
Health Risk Profile for San Ramon
Current EPA monitoring data for San Ramon shows contaminant levels within guideline thresholds across all ZIP codes in this dataset. As with all public water systems, sensitive populations may choose to use a certified filter for additional peace of mind.
Best Broad-Spectrum Filters for This Water Profile
This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.
8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.
See recommendations matched to your exact address: choose your ZIP code below.
Frequently Asked Questions about San Ramon Tap Water
Is San Ramon tap water safe to drink?
San Ramon tap water currently meets EPA health guidelines across all monitored ZIP codes in this dataset. Sensitive populations may still choose to use a certified filter as a precaution.
What contaminants are in San Ramon tap water?
The most commonly detected contaminants in San Ramon water systems include: lithium, PFTrDA, 6:2 FTS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does San Ramon get its drinking water?
San Ramon receives water from 2 public water systems, including DUBLIN SAN RAMON SERVICES DISTRICT.
Do I need a water filter in San Ramon?
Current data does not show guideline exceedances in San Ramon. A certified filter can still reduce trace contaminants and improve taste for households that prefer filtered water.
How often is San Ramon tap water tested?
Public water systems in San Ramon are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2024-09-03.
Tap water reports by ZIP in San Ramon
- 94582 - Tassajara CCD, San Ramon tap water report Some concern
- 94583 - Norris Canyon, San Ramon tap water report Some concern
Water utilities serving San Ramon, CA
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- EAST BAY MUDSome concern
- DUBLIN SAN RAMON SERVICES DISTRICTLooks OK
- ZONE 7 WATER AGENCYNo recent federal sampling
Also covers / overlaps with
- Central Contra Costa CCD, CA · Township
- Norris Canyon, CA · CDP
- Tassajara CCD, CA · Township