Know Your Environment. Protect Your Health.

Chromium (total)

Foothill Estates Ws

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
2018ND10ND
2019N/A00N/A
2020ND20ND
2021N/A00N/A
20224.20 ppb443.30 ppb - 5.10 ppb
20232.67 ppb64ND - 5.30 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
2018-12-18CA2702198_002_002-201812181601ND
2020-08-27CA2702198_002_002-202008271331ND
2020-11-19CA2702198_002_002-202011191436ND
2022-06-24CA2702198_002_002-2022062411045.10 ppb
2022-09-26CA2702198_002_002-2022092611423.70 ppb
2022-11-30CA2702198_002_002-2022113009443.30 ppb
2022-12-14CA2702198_002_002-2022121414344.70 ppb
2023-03-28CA2702198_002_002-2023032815303.00 ppb
2023-06-23CA2702198_002_002-2023062313053.50 ppb
2023-08-24CA2702198_002_002-202308241439ND
2023-09-19CA2702198_001_001-202309191413ND
2023-10-06CA2702198_001_001-2023100609305.30 ppb
2023-11-28CA2702198_002_002-2023112809304.20 ppb