Know Your Environment. Protect Your Health.

Chromium (total)

Town of Ponder

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020N/A00N/A
20215.57 ppb335.10 ppb - 6.50 ppb
20223.90 ppb113.90 ppb
2023N/A00N/A

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
2018-03-07Q1809461009ND
2018-03-07Q1809461010ND
2018-03-13Q1810192004ND
2019-04-04Q1913697006ND
2021-06-28Q21167570145.10 ppb
2021-06-28Q21167570155.10 ppb
2021-06-28Q21167570166.50 ppb
2022-06-30Q22185500173.90 ppb