Know Your Environment. Protect Your Health.

Chromium (total)

Holtville, City Of

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.

 

7

Samples

1

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
202365.0 ppb21ND - 130.0 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
2018-04-26CA1310005_001_001-201804260937ND
2019-07-25CA1310005_001_001-201907250833ND
2020-10-22CA1310005_001_001-202010221531ND
2021-02-25CA1310005_001_001-202102251334ND
2022-04-27CA1310005_001_001-202204271220ND
2023-07-27CA1310005_001_001-202307271125130.0 ppb
2023-10-25CA1310005_001_001-202310250925ND