Know Your Environment. Protect Your Health.

Chromium (total)

Town of Poolesville

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019N/A00N/A
2020N/A00N/A
2021ND40ND
20220.576 ppb73ND - 1.71 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
2018-12-176389_428_1_3ND
2018-12-176389_428_1_4ND
2018-12-176389_428_1_5ND
2018-12-176389_428_1_6ND
2018-12-176389_428_2ND
2018-12-176389_428_1_1ND
2021-01-21E21001855002ND
2021-04-06E21002756002ND
2021-08-05E22000418003ND
2021-08-05E22000418002ND
2022-07-19E2300012302ND
2022-07-19E2300012303ND
2022-07-19E2300012304ND
2022-12-13FWL0344_011.71 ppb
2022-12-13FWL0348_011.000 ppb
2022-12-13FWL0349_011.32 ppb
2022-12-13FWL0350_01ND
2023-10-18E2400146902ND