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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Lake Arrowhead CSD

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.

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52

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND80ND
2016ND70ND
2017ND160ND
2018ND70ND
2019ND60ND

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
2014-06-263761-004-1108ND
2014-07-093761-013-1204ND
2014-07-093761-012-1228ND
2014-07-093761-010-1221ND
2014-07-093761-009-1238ND
2014-07-093761-007-1253ND
2014-07-093761-006-1216ND
2014-07-093761-002-0843ND
2015-04-223761-004-1110ND
2015-07-083761-002-1007ND
2015-07-083761-007-1112ND
2015-07-083761-006-1047ND
2015-07-083761-009-1105ND
2015-07-083761-011-1042ND
2015-07-083761-012-1056ND
2015-08-123761-013-1010ND
2016-06-083761-004-1057ND
2016-07-133761-002-1302ND
2016-07-143761-013-1010ND
2016-07-143761-012-1033ND
2016-07-143761-006-1027ND
2016-07-143761-007-1052ND
2016-07-143761-009-1043ND
2017-02-233761-004-0900ND
2017-04-193761-002-0955ND
2017-04-193761-005-0921ND
2017-06-073761-005-0924ND
2017-06-073761-002-1221ND
2017-06-073761-604-1152ND
2017-07-183761-002-1136ND
2017-07-193761-009-0837ND
2017-07-193761-007-0905ND
2017-07-193761-012-0936ND
2017-07-193761-006-0920ND
2017-07-193761-013-0917ND
2017-07-193761-013-1011ND
2017-09-063761-002-0900ND
2017-09-063761-004-1204ND
2017-09-063761-604-1315ND
2018-02-143761-004-0925ND
2018-05-233761-007-0930ND
2018-07-113761-013-0932ND
2018-07-113761-013-0917ND
2018-07-113761-012-0955ND
2018-07-113761-006-0944ND
2018-08-153761-002-0855ND
2019-02-273761-004-1000ND
2019-07-103761-002-0843ND
2019-07-173761-013-1000ND
2019-07-173761-012-1025ND
2019-07-173761-009-1030ND
2019-07-173761-006-1018ND