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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Cal/Am Water Company - San Marino

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

MORE ABOUT THIS CONTAMINANT

 

113

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.24 ppb5129ND - 12.2 ppb
20152.24 ppb144ND - 13.0 ppb
20161.79 ppb244ND - 12.0 ppb
2017ND10ND
2018ND10ND
2019ND220ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-299590-007-1000ND
2014-04-141225-006-1050ND
2014-04-141225-007-1110ND
2014-04-141225-011-085512.0 ppb
2014-04-141225-020-1045ND
2014-04-141225-023-0935ND
2014-04-141225-029-0950ND
2014-04-141225-032-1015ND
2014-04-141225-044-0925ND
2014-05-121225-014-1300ND
2014-05-13255667018.50 ppb
2014-05-13255664016.60 ppb
2014-05-13255669018.90 ppb
2014-05-13255670010.200 ppb
2014-05-13255657010.200 ppb
2014-05-13255672019.90 ppb
2014-05-14255668019.80 ppb
2014-05-14255658016.90 ppb
2014-05-14255656017.00 ppb
2014-05-14255655017.20 ppb
2014-05-14255673016.90 ppb
2014-05-191225-010-085012.0 ppb
2014-06-059590-010-1300ND
2014-06-169590-006-1125ND
2014-06-169590-007-1100ND
2014-06-169590-010-0850ND
2014-06-169590-011-0920ND
2014-06-169590-017-1305ND
2014-06-169590-020-1000ND
2014-06-169590-023-0945ND
2014-06-169590-029-1205ND
2014-06-169590-032-0735ND
2014-06-169590-044-1230ND
2014-06-231225-017-1045ND
2014-07-14255663015.90 ppb
2014-08-12266245010.300 ppb
2014-08-12266240015.70 ppb
2014-11-042743490112.2 ppb
2014-11-04274347015.30 ppb
2014-11-05274353019.30 ppb
2014-11-05274339018.20 ppb
2014-11-05274357018.20 ppb
2014-11-1027435401ND
2014-11-10274341017.80 ppb
2014-11-10274350017.10 ppb
2014-11-12274352019.90 ppb
2014-11-12274351019.40 ppb
2014-11-12274348016.80 ppb
2014-11-12274340018.10 ppb
2014-11-12274342016.60 ppb
2014-12-0431599259.20 ppb
2015-02-02282466017.00 ppb
2015-02-02282471010.300 ppb
2015-05-121225-007-1200ND
2015-05-121225-017-1245ND
2015-05-181225-011-105011.0 ppb
2015-05-181225-023-1110ND
2015-05-181225-032-1130ND
2015-05-181225-044-1110ND
2015-05-201225-006-1255ND
2015-05-201225-029-1235ND
2015-05-271225-010-083013.0 ppb
2015-05-271225-020-0855ND
2015-09-089588-010-0915ND
2015-09-089588-020-0935ND
2016-06-061225-006-1100ND
2016-06-061225-007-1210ND
2016-06-061225-010-100012.0 ppb
2016-06-061225-017-1130ND
2016-06-061225-020-1040ND
2016-06-061225-023-1135ND
2016-06-061225-029-1045ND
2016-06-061225-032-110511.0 ppb
2016-06-061225-044-1000ND
2016-06-099588-007-0915ND
2016-09-079588-011-110510.00 ppb
2016-09-079588-017-1020ND
2016-09-079588-023-1120ND
2016-09-079588-032-114010.00 ppb
2016-09-149590-006-0930ND
2016-09-149590-007-0835ND
2016-09-149590-010-0805ND
2016-09-149590-011-1130ND
2016-09-149590-017-0900ND
2016-09-149590-020-1145ND
2016-09-149590-023-1200ND
2016-09-149590-029-0920ND
2016-09-149590-032-1225ND
2016-09-149590-044-0945ND
2017-01-179590-020-1010ND
2018-09-209588-020-1040ND
2019-05-139588-017-1015ND
2019-05-139588-020-0930ND
2019-05-139588-023-0945ND
2019-05-139588-032-0955ND
2019-05-159590-006-1130ND
2019-05-159590-029-0845ND
2019-05-159590-044-0925ND
2019-06-189588-007-1050ND
2019-06-189590-007-1155ND
2019-06-189588-011-1005ND
2019-07-109590-006-1009ND
2019-07-109590-007-1104ND
2019-07-109590-011-0939ND
2019-07-109590-017-1041ND
2019-07-109590-020-0921ND
2019-07-109590-023-0833ND
2019-07-109590-029-1032ND
2019-07-109590-032-0823ND
2019-07-109590-044-1020ND
2019-07-179590-011-1050ND
2019-08-269588-010-0945ND
2019-08-269590-010-1001ND