Know Your Environment. Protect Your Health.

Chromium (total)

City Of Glen Rose

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND40ND
20202.40 ppb112.40 ppb
20212.50 ppb112.50 ppb
20220.875 ppb41ND - 3.50 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
2019-05-01Q1917515005ND
2019-05-01Q1917515006ND
2019-05-01Q1917515018ND
2019-05-01Q1917515019ND
2022-02-22Q22062420033.50 ppb
2022-11-03Q2233476001ND
2022-11-03Q2233476004ND
2022-11-03Q2233476005ND
2023-01-11Q2301770005ND