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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Cal/Am Water Company - San Marino

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).

MORE ABOUT THIS CONTAMINANT

 

142

Samples

0

Samples exceeding legal limit (MCL)

141

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20147.30 ppb50500.0400 ppb - 11.3 ppb
20158.04 ppb21210.0400 ppb - 10.7 ppb
20167.21 ppb1716ND - 10.4 ppb
20177.91 ppb25253.83 ppb - 10.6 ppb
20188.89 ppb886.40 ppb - 11.0 ppb
20197.69 ppb21214.00 ppb - 9.50 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
2014-01-299590-007-10002.60 ppb
2014-05-12255666016.90 ppb
2014-05-13255667018.39 ppb
2014-05-13255664017.10 ppb
2014-05-13255669018.97 ppb
2014-05-13255670010.0400 ppb
2014-05-13255672018.98 ppb
2014-05-13255657010.0500 ppb
2014-05-14255668019.79 ppb
2014-05-14255658017.05 ppb
2014-05-14255656017.41 ppb
2014-05-14255655016.73 ppb
2014-05-14255673016.66 ppb
2014-05-19255665019.09 ppb
2014-06-059590-010-13009.90 ppb
2014-06-169590-006-11256.50 ppb
2014-06-169590-007-11003.60 ppb
2014-06-169590-010-08509.80 ppb
2014-06-169590-011-09209.70 ppb
2014-06-169590-017-13058.70 ppb
2014-06-169590-020-10006.30 ppb
2014-06-169590-023-09458.20 ppb
2014-06-169590-029-12057.50 ppb
2014-06-169590-032-07358.90 ppb
2014-06-169590-044-12303.80 ppb
2014-07-14255663015.96 ppb
2014-08-12266245010.0400 ppb
2014-08-12266240016.32 ppb
2014-11-042743490110.3 ppb
2014-11-04274347014.72 ppb
2014-11-05274353018.32 ppb
2014-11-05274339018.04 ppb
2014-11-05274357018.21 ppb
2014-11-101225-006-09557.13 ppb
2014-11-101225-007-09104.39 ppb
2014-11-101225-010-114511.1 ppb
2014-11-101225-011-09009.69 ppb
2014-11-101225-017-09305.34 ppb
2014-11-101225-020-08456.62 ppb
2014-11-101225-023-08308.66 ppb
2014-11-101225-029-10058.40 ppb
2014-11-101225-032-08009.13 ppb
2014-11-101225-044-10154.35 ppb
2014-11-122743520111.3 ppb
2014-11-12274351019.76 ppb
2014-11-12274348017.93 ppb
2014-11-12274340018.35 ppb
2014-11-12274342018.37 ppb
2014-12-041225-010-08309.93 ppb
2014-12-049590-010-083010.00 ppb
2015-01-261225-010-110510.2 ppb
2015-01-261225-011-08509.96 ppb
2015-02-02282471010.0400 ppb
2015-02-02282466015.84 ppb
2015-04-081225-010-074510.7 ppb
2015-04-231225-010-14459.81 ppb
2015-04-239590-010-144510.00 ppb
2015-04-279590-010-101510.00 ppb
2015-05-121225-007-12004.34 ppb
2015-05-121225-017-12455.51 ppb
2015-05-181225-011-105010.1 ppb
2015-05-181225-023-11108.63 ppb
2015-05-181225-032-11309.09 ppb
2015-05-181225-044-11104.78 ppb
2015-05-201225-006-12558.58 ppb
2015-05-201225-029-12358.78 ppb
2015-05-271225-020-08556.29 ppb
2015-07-289590-010-10009.70 ppb
2015-09-089588-010-091510.00 ppb
2015-09-089588-020-09356.40 ppb
2015-09-159590-010-135010.00 ppb
2016-05-259590-010-082010.00 ppb
2016-05-259590-023-11209.50 ppb
2016-05-259590-032-11359.50 ppb
2016-06-099588-007-09153.80 ppb
2016-09-079588-011-11059.30 ppb
2016-09-079588-017-10205.70 ppb
2016-09-079588-023-1120ND
2016-11-071225-006-09557.24 ppb
2016-11-071225-007-10303.96 ppb
2016-11-071225-010-091010.4 ppb
2016-11-071225-011-10458.84 ppb
2016-11-071225-020-09256.70 ppb
2016-11-071225-023-09408.58 ppb
2016-11-071225-029-09457.94 ppb
2016-11-071225-032-10008.68 ppb
2016-11-071225-044-08504.05 ppb
2016-12-059588-032-10458.40 ppb
2017-03-019588-010-08459.60 ppb
2017-03-019588-023-10008.60 ppb
2017-03-019588-032-10109.20 ppb
2017-03-151225-006-08005.48 ppb
2017-03-151225-029-08306.18 ppb
2017-03-151225-044-08153.83 ppb
2017-06-089588-010-091510.00 ppb
2017-06-089588-023-10259.10 ppb
2017-06-089588-032-10458.90 ppb
2017-06-191225-029-083510.6 ppb
2017-06-261225-006-08209.68 ppb
2017-06-261225-044-09105.28 ppb
2017-06-291225-029-11107.58 ppb
2017-09-111225-006-09006.99 ppb
2017-09-111225-029-09207.53 ppb
2017-09-111225-044-10003.91 ppb
2017-09-209588-010-090010.00 ppb
2017-09-209588-023-09559.60 ppb
2017-09-209588-032-10259.00 ppb
2017-12-041225-006-08406.88 ppb
2017-12-041225-029-08557.56 ppb
2017-12-041225-044-09403.88 ppb
2017-12-059588-010-091010.00 ppb
2017-12-059588-023-09259.50 ppb
2017-12-059588-032-09359.00 ppb
2018-03-069588-023-10108.50 ppb
2018-03-069588-032-10009.60 ppb
2018-06-149588-032-11008.70 ppb
2018-09-209588-020-10406.40 ppb
2018-09-209588-023-10208.70 ppb
2018-09-209588-032-10558.90 ppb
2018-12-189588-023-09409.30 ppb
2018-12-189588-032-101511.0 ppb
2019-03-199588-023-09309.00 ppb
2019-03-199588-032-09409.30 ppb
2019-05-139588-017-10155.60 ppb
2019-05-139588-020-09306.50 ppb
2019-05-139588-023-09458.70 ppb
2019-05-139588-032-09558.80 ppb
2019-05-159590-006-11307.10 ppb
2019-05-159590-029-08457.30 ppb
2019-05-159590-044-09254.00 ppb
2019-06-189588-007-10504.00 ppb
2019-06-189588-011-10057.20 ppb
2019-08-079588-011-10009.50 ppb
2019-08-079588-023-10258.80 ppb
2019-08-079588-032-10359.00 ppb
2019-08-269588-010-09458.50 ppb
2019-11-041225-006-12207.78 ppb
2019-11-041225-029-11558.34 ppb
2019-11-199588-011-09508.80 ppb
2019-11-199588-023-10007.10 ppb
2019-11-199588-032-10058.50 ppb
2019-12-209588-010-09107.60 ppb