Know Your Environment. Protect Your Health.

Chromium (total)

Arlington Water Department

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.67 ppb31ND - 5.00 ppb
20192.00 ppb21ND - 4.00 ppb
2020N/A00N/A
20212.40 ppb21ND - 4.80 ppb
20222.05 ppb21ND - 4.10 ppb
20231.95 ppb21ND - 3.90 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
2018-04-175.00 ppb
2018-08-14ND
2018-08-14ND
2019-04-024.00 ppb
2019-09-11ND
2021-04-0640958864.80 ppb
2021-09-154180777ND
2022-04-1342688994.10 ppb
2022-09-144359678ND
2023-04-0444397563.90 ppb
2023-09-214527327ND