- Failed some Health Guidelines
- Passed All Legal Limits
- Met all Reporting and Monitoring Requirements
- Uses Chlorine plus Ammonia (Chloramines) disinfectant
Tap water in the city of San Jose comes from three different sources: groundwater, mountain water, and imported water. San Jose's groundwater is extracted from over 100 local wells that tap into the Santa Clara Valley Basin. Mountain water is collected from the Santa Cruz Mountains and treated. Imported water is also purchased from the Santa Clara Valley Water District. In recent years, radioactive elements, arsenic and lead have exceeded health guidelines.
San Jose, CA Water Quality Recent Violations
There was 1 health violation found in San Jose, CA by the EPA in the 2010-2012 reporting periods. They are listed in the table below.
Drinking Water Rule or Contaminant Date Violation Last Reported
Violation Type Violation Number of Violations Enforcement Action Total Coliform Rule
Health-Based: Maximum Contaminant Level violation
MCL, Monthly (TCR)
AO (without penalty) Issued
There were no reporting, montioring or other reported violations for in the 2010-2012 reporting periods
San Jose, CA Water Quality Historical Violations
|Contaminant||Total Tests||Positive Results||Above Health Limits||Above Legal Limits||EPA Regulated||Max Result||Health Limit||Legal Limit|
|Alpha particle activity||185||152||152||0||Yes||9.50||-||15|
|Combined Uranium (mg/L)||1||1||1||0||Yes||1.20||0.50||30|
|Combined Uranium (pCi/L)||9||3||0||0||Yes||0.96||15||15|
|Dichloromethane (methylene chloride)||14||2||0||0||Yes||2.30||500||5|
|Mercury (total inorganic)||104||35||0||0||Yes||2.32||2||2|
|Nitrate & nitrite||78||74||0||0||Yes||7.30||10||10|
|Total haloacetic acids (HAAs)||15||2||0||0||Yes||10||70||60|
|Total trihalomethanes (TTHMs)||298||49||0||0||Yes||69.30||-||80|
38 Contaminants were detected, 0 above legal limits, 7 above health guidelines, and 31 below limits for water suppliers serving San Jose, CA between 2004 and 2009.
140 Water Contaminants were tested for in the San Jose, CA area but not found in drinking water between 2004 and 2009.
Data Source: NYTimes.com
The scores and results above reflect a summary of the historical drinking water testing results that has been documented by the EPA and other sources. The color coding of the symbols was developed by WaterFilterComparisions.com as an easy way for individuals to gauge the historical effectiveness of San Jose water suppliers in meeting legal and health regulations in providing clean drinking water. This should only be used as a guide, and WaterFilterComparisons recommends you contact San Jose water suppliers to better understand the quality of the drinking water in San Jose, .