Know Your Environment. Protect Your Health.

Chromium (total)

Concho Rural Water Grape Creek

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

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20191.60 ppb331.40 ppb - 1.90 ppb
2020ND10ND
2021ND10ND
20227.65 ppb227.30 ppb - 8.00 ppb
2023ND10ND

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
2019-02-28Q19085910011.40 ppb
2019-02-28Q19085910121.90 ppb
2019-02-28Q19085910131.50 ppb
2020-03-04Q2008293011ND
2022-03-03Q22074580028.00 ppb
2022-03-03Q22074580067.30 ppb
2023-03-09Q2309465016ND