Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chromium (hexavalent)

San Francisco Regional Water System

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND20ND
2015ND30ND
2016ND10ND
2017ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-06-179590-001-1130ND
2014-06-179590-016-0904ND
2015-05-279590-001-1235ND
2015-05-279590-016-0830ND
2015-06-189590-015-0915ND
2016-06-219590-016-1055ND
2017-06-199590-001-1025ND
2017-06-199590-015-1100ND
2017-06-199590-016-0953ND