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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Calleguas Municipal Water District

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.250 ppb81ND - 2.00 ppb
20151.25 ppb86ND - 2.00 ppb
20161.000 ppb85ND - 2.00 ppb
20175.25 ppb81ND - 42.0 ppb
2018ND80ND
2019ND80ND

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
2014-01-105867-010-1130ND
2014-01-105867-006-0945ND
2014-03-215867-007-1125ND
2014-03-315867-006-10202.00 ppb
2014-04-115867-009-1010ND
2014-04-185867-011-1030ND
2014-05-075867-004-0915ND
2014-11-185867-008-1315ND
2015-02-025867-004-0815ND
2015-02-195867-017-14151.000 ppb
2015-10-215867-014-1020ND
2015-10-275867-016-11302.00 ppb
2015-10-275867-015-13001.000 ppb
2015-10-275867-012-10302.00 ppb
2015-11-045867-004-13402.00 ppb
2015-11-055867-013-11402.00 ppb
2016-04-045867-004-08402.00 ppb
2016-04-055867-023-1000ND
2016-04-055867-022-0930ND
2016-04-065867-021-11502.00 ppb
2016-04-065867-020-13051.000 ppb
2016-04-065867-019-10302.00 ppb
2016-04-065867-018-11001.000 ppb
2016-11-075867-004-0745ND
2017-03-215867-004-1040ND
2017-04-175867-009-1245ND
2017-04-175867-008-100542.0 ppb
2017-04-185867-006-1130ND
2017-04-195867-011-1050ND
2017-10-165867-004-0855ND
2017-11-065867-007-1015ND
2017-11-065867-010-1120ND
2018-02-135867-016-0945ND
2018-02-135867-015-1050ND
2018-02-265867-004-0915ND
2018-03-075867-013-1320ND
2018-03-085867-014-1330ND
2018-03-085867-012-1000ND
2018-04-305867-017-1030ND
2018-11-055867-004-0820ND
2019-01-295867-004-0930ND
2019-02-045867-018-0945ND
2019-02-055867-022-1020ND
2019-02-055867-023-0945ND
2019-02-075867-020-0840ND
2019-02-115867-021-0930ND
2019-02-195867-019-1100ND
2019-11-045867-004-0800ND