Know Your Environment. Protect Your Health.

Chromium (total)

Hynes Estates Mutual Water Company

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND20ND
2020ND90ND
20211.10 ppb111.10 ppb
2022N/A00N/A
20232.65 ppb222.20 ppb - 3.10 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
2019-07-10CA3000519_005_005-201907101130ND
2019-11-07CA3000519_005_005-201911071310ND
2020-02-04CA3000519_005_005-202002041035ND
2020-03-12CA3000519_005_005-202003121015ND
2020-03-12CA3000519_005_005-202003121025ND
2020-05-05CA3000519_005_005-202005051010ND
2020-05-05CA3000519_001_001-202005051030ND
2020-05-21CA3000519_001_001-202005211100ND
2020-05-21CA3000519_001_001-202005211105ND
2020-06-16CA3000519_001_001-202006161000ND
2020-11-17CA3000519_001_001-202011170905ND
2021-08-03CA3000519_005_005-2021080310051.10 ppb
2023-02-01CA3000519_001_001-2023020111153.10 ppb
2023-07-13CA3000519_005_005-2023071310252.20 ppb