Is San Jose tap water safe to drink?
Yes but with caveats
San Jose's water meets EPA minimum standards but has some concerns including PFAS detected. Filtration is recommended for sensitive individuals.
4 Issues Detected in San Jose
PFAS (Forever Chemicals) Detected
PFAS are man-made chemicals that do not break down and accumulate in the body.
PFAS details for San JoseModerately Hard Water (9.1 GPG)
Hardness above 7 GPG can cause minor scale buildup.
Hardness data for San Jose951,019,511,095,112 · Sacramento Delta and local groundwater
San Jose, CA Water Quality Report
Water Quality Data
Contaminant Levels
Health Insights
- 1With a hardness of 9.1 GPG, San Jose residents may notice white scale on faucets. Hard water increases maintenance costs.
- 2PFAS have been identified in San Jose's water at 3.5 parts per trillion. A reverse osmosis system is the most reliable home treatment.
- 3Chlorine levels may affect the taste of San Jose's tap water. A carbon filter improves flavor.
Score
San Jose tap water is sourced from Sacramento Delta and local groundwater and treated by San Jose Water Company. PFAS forever chemicals have been detected. Water hardness is hard at 9.1 GPG which may cause scale buildup. Overall purity score: 63/100 (Moderate). Updated for 2026.
MATCHED TO SAN JOSE'S WATER DATA
Best Water Filters for San Jose, CA (2026)
Matched to PFAS Detected, Hard Water (9.1 GPG), Moderate Chlorine in San Jose.
Clearly Filtered Water Pitcher
Pitcher Filter
$80-95
Why this fits San Jose
- Removes 99%+ of PFAS detected in San Jose's water
- Eliminates chlorine taste and odor from San Jose's water
- NSF/ANSI 42 + NSF/ANSI 53 + NSF/ANSI 401 certified
Waterdrop G3P800 Tankless RO
Tankless Reverse Osmosis
$380-450
Why this fits San Jose
- Removes 99%+ of PFAS detected in San Jose's water
- Eliminates chlorine taste and odor from San Jose's water
- NSF/ANSI 58 + NSF 372 certified
APEC Water Systems ROES-50
Under-Sink Reverse Osmosis
$195-220
Why this fits San Jose
- Removes 99%+ of PFAS detected in San Jose's water
- Eliminates chlorine taste and odor from San Jose's water
- NSF/ANSI 58 certified
Waterdrop 10UA Under-Sink Filter
Under-Sink Carbon Filter
$40-60
Why this fits San Jose
- Eliminates chlorine taste and odor from San Jose's water
- NSF/ANSI 42 certified
- Budget-friendly at $40-60
As an Amazon Associate, PurityMap may earn from qualifying purchases. Based on latest San Jose water data.
Know exactly what's in YOUR tap
City data shows averages. Your home may differ.
Test Your Water — $25-30Explore San Jose Water Data
San Jose Water FAQ
Is San Jose CA tap water safe to drink in 2026?
Does San Jose CA use chlorine or chloramine for disinfection?
How hard is San Jose CA water and what is the TDS level?
Has PFAS been found in San Jose CA drinking water?
What is the best water filter for San Jose?
Nearby Reports
Compare across all 50 US states
Data Sources
- EPA SDWIS
- EWG Tap Water Database
- San Jose Water Company CCR
- USGS monitoring data
PurityMap compiles public data. Updated March 2026.