Know Your Environment. Protect Your Health.

Chromium (total)

Windthorst Water Supply Corporation

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20191.10 ppb111.10 ppb
20201.10 ppb111.10 ppb
2021ND10ND
20223.10 ppb113.10 ppb
20234.90 ppb114.90 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
2018-09-11Q1835996004ND
2019-09-16Q19655510051.10 ppb
2020-03-04Q20082240021.10 ppb
2021-08-10Q2121376004ND
2022-07-12Q22194800063.10 ppb
2023-02-21Q23070620034.90 ppb