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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

Los Angeles County WW District 40 Reg 38 Lake Los Angeles

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).

 

70

Samples

0

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20148.19 ppb14140.650 ppb - 13.0 ppb
201511.4 ppb16167.85 ppb - 13.9 ppb
201610.7 ppb20208.15 ppb - 13.4 ppb
20179.09 ppb20205.44 ppb - 12.0 ppb

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
2014-01-15201401160352AM11.0 ppb
2014-01-15201401160359AM1.70 ppb
2014-01-15201401160361AM13.0 ppb
2014-01-15201401160354AM1.50 ppb
2014-04-14201404210015AM12.0 ppb
2014-04-14201404210013AM12.0 ppb
2014-07-09201407110429AM0.650 ppb
2014-07-09201407110417AM12.0 ppb
2014-07-09201407110443AM4.40 ppb
2014-07-09201407110432AM9.90 ppb
2014-10-08201410090509AM12.0 ppb
2014-10-08201410090507AM0.900 ppb
2014-12-095442-003-095412.7 ppb
2014-12-095442-008-094810.9 ppb
2015-03-115442-003-102513.6 ppb
2015-03-245442-008-10229.40 ppb
2015-06-225442-003-091613.8 ppb
2015-06-225442-008-100711.1 ppb
2015-07-075442-003-100513.9 ppb
2015-07-075442-008-102910.7 ppb
2015-08-125442-003-104513.7 ppb
2015-08-125442-008-10198.10 ppb
2015-09-235442-008-11068.73 ppb
2015-09-235442-003-104613.3 ppb
2015-10-075442-003-104913.4 ppb
2015-10-075442-008-11159.47 ppb
2015-11-175442-003-101613.1 ppb
2015-11-175442-008-09488.28 ppb
2015-12-175442-003-094913.3 ppb
2015-12-175442-008-09397.85 ppb
2016-01-265442-008-11528.92 ppb
2016-01-265442-003-111813.4 ppb
2016-04-195442-008-09208.15 ppb
2016-04-195442-003-091012.8 ppb
2016-05-125442-008-09558.50 ppb
2016-05-125442-003-105011.8 ppb
2016-06-085442-003-112512.8 ppb
2016-06-085442-008-11159.44 ppb
2016-07-255442-008-113010.4 ppb
2016-07-255442-003-110011.4 ppb
2016-08-095442-008-095510.6 ppb
2016-08-095442-003-102511.6 ppb
2016-09-135442-008-105510.5 ppb
2016-09-135442-003-110511.9 ppb
2016-10-195442-003-103011.8 ppb
2016-10-195442-008-10158.77 ppb
2016-11-085442-008-09109.66 ppb
2016-11-085442-003-094010.9 ppb
2016-12-215442-008-10008.67 ppb
2016-12-215442-003-104011.4 ppb
2017-01-245442-008-10108.48 ppb
2017-01-245442-003-10225.44 ppb
2017-02-075442-003-09297.00 ppb
2017-02-075442-008-09189.50 ppb
2017-03-145442-003-100612.0 ppb
2017-03-145442-008-09369.00 ppb
2017-04-189590-008-09308.80 ppb
2017-05-179590-008-09269.90 ppb
2017-05-229590-010-10208.00 ppb
2017-06-129588-010-11108.60 ppb
2017-06-199588-010-11008.70 ppb
2017-06-219588-008-091111.0 ppb
2017-06-269588-010-10158.70 ppb
2017-07-039588-010-09168.80 ppb
2017-07-069588-010-10059.10 ppb
2017-07-109588-010-12258.90 ppb
2017-07-179588-008-093511.0 ppb
2017-07-179588-010-11248.40 ppb
2017-07-249588-010-10539.40 ppb
2017-09-199590-008-095311.0 ppb