Know Your Environment. Protect Your Health.

Chromium (total)

Cal Am - Dunnigan

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201843.5 ppb4441.0 ppb - 47.0 ppb
201936.3 ppb4419.0 ppb - 43.0 ppb
202027.0 ppb32ND - 42.0 ppb
202118.3 ppb94ND - 44.0 ppb
202221.9 ppb105ND - 68.0 ppb
202336.1 ppb1411ND - 71.0 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-02-14CA5700712_001_001-20180214090043.0 ppb
2018-05-15CA5700712_001_001-20180515090047.0 ppb
2018-08-14CA5700712_001_001-20180814100541.0 ppb
2018-11-06CA5700712_001_001-20181106103043.0 ppb
2019-02-19CA5700712_001_001-20190219113043.0 ppb
2019-05-08CA5700712_001_001-20190508092619.0 ppb
2019-08-14CA5700712_001_001-20190814130042.0 ppb
2019-11-26CA5700712_001_001-20191126101041.0 ppb
2020-02-12CA5700712_001_001-20200212101539.0 ppb
2020-05-14CA5700712_001_001-20200514090542.0 ppb
2020-05-14CA5700712_011_011-202005141018ND
2021-02-10CA5700712_011_011-202102101010ND
2021-02-10CA5700712_001_001-20210210093043.0 ppb
2021-05-12CA5700712_001_001-20210512090044.0 ppb
2021-05-12CA5700712_011_011-202105121055ND
2021-08-12CA5700712_011_011-202108121035ND
2021-08-12CA5700712_011_011-202108121008ND
2021-08-18CA5700712_001_001-20210818111541.0 ppb
2021-11-10CA5700712_001_001-20211110090037.0 ppb
2021-11-10CA5700712_011_011-202111101155ND
2022-02-15CA5700712_001_001-20220215105537.0 ppb
2022-02-15CA5700712_011_011-202202151125ND
2022-03-17CA5700712_001_001-20220317113038.0 ppb
2022-05-18CA5700712_011_011-202205181300ND
2022-05-18CA5700712_001_001-20220518113037.0 ppb
2022-08-17CA5700712_011_011-202208170930ND
2022-08-17CA5700712_001_001-20220817083039.0 ppb
2022-08-23CA5700712_050_050-20220823090068.0 ppb
2022-11-09CA5700712_001_001-202211091015ND
2022-11-09CA5700712_011_011-202211091043ND
2023-01-17CA5700712_050_050-20230117110051.0 ppb
2023-01-17CA5700712_050_050-20230117110048.0 ppb
2023-02-07CA5700712_001_001-20230207094838.0 ppb
2023-02-07CA5700712_050_050-20230207123560.0 ppb
2023-02-07CA5700712_011_011-202302071325ND
2023-03-20CA5700712_011_011-202303201252ND
2023-05-08CA5700712_011_011-202305081045ND
2023-05-08CA5700712_050_050-20230508102055.0 ppb
2023-05-08CA5700712_001_001-20230508090038.0 ppb
2023-08-03CA5700712_050_050-20230803105046.0 ppb
2023-08-07CA5700712_001_001-20230807090030.0 ppb
2023-11-08CA5700712_001_001-20231108085051.0 ppb
2023-11-08CA5700712_011_011-20231108105017.0 ppb
2023-11-08CA5700712_050_050-20231108094071.0 ppb