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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

City of Carlsbad

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).

 

8

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND130ND
20130.200 ppb220.0600 ppb - 0.340 ppb
20140.0683 ppb660.0400 ppb - 0.0900 ppb
2015ND150ND
2016ND120ND
2017ND140ND

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
2013-10-2329183700.340 ppb
2013-10-2329183820.0600 ppb
2014-01-2229617880.0700 ppb
2014-01-2229618030.0800 ppb
2014-04-1630095790.0700 ppb
2014-04-1630095680.0900 ppb
2014-07-3130735920.0400 ppb
2014-07-3130735710.0600 ppb