Know Your Environment. Protect Your Health.

Chromium (total)

Joshua Basin 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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201816.3 ppb3311.0 ppb - 19.0 ppb
201928.5 ppb2224.0 ppb - 33.0 ppb
202022.5 ppb4413.0 ppb - 34.0 ppb
2021N/A00N/A
2022N/A00N/A
202324.0 ppb4412.0 ppb - 37.0 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
2018-05-10CA3610025_008_008-20180510060019.0 ppb
2018-11-05CA3610025_009_009-20181105053019.0 ppb
2018-11-05CA3610025_005_005-20181105050011.0 ppb
2019-02-11CA3610025_011_011-20190211081533.0 ppb
2019-02-11CA3610025_010_010-20190211073024.0 ppb
2020-11-17CA3610025_009_009-20201117080019.0 ppb
2020-11-17CA3610025_011_011-20201117093034.0 ppb
2020-11-17CA3610025_010_010-20201117100024.0 ppb
2020-11-17CA3610025_005_005-20201117073013.0 ppb
2023-11-07CA3610025_005_005-20231107063112.0 ppb
2023-11-07CA3610025_011_011-20231107092837.0 ppb
2023-11-07CA3610025_009_009-20231107082821.0 ppb
2023-11-07CA3610025_010_010-20231107071026.0 ppb