Know Your Environment. Protect Your Health.

Chromium (total)

Westchester County Water District #3

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
2018ND10ND
2019ND10ND
2020ND40ND
20210.250 ppb41ND - 1.000 ppb
20221.75 ppb42ND - 4.00 ppb
2023ND40ND

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
2018-10-02AU21376INPND
2019-11-21AV24564INPND
2020-04-28AW07856INPND
2020-11-17AW22089INPND
2020-12-15AW23893-INPND
2020-12-15AW23891-INPND
2021-04-06AX06359-INPND
2021-10-29AX21799-INP1.000 ppb
2021-11-09AX22573-INPND
2021-11-09AX22576-INPND
2022-04-11AY05984-INPND
2022-10-19AY18880-INPND
2022-11-01AY19679-INP4.00 ppb
2022-11-01AY19681-INP3.00 ppb
2023-04-25AZ07359-INPND
2023-10-19AZ19381-INPND
2023-11-01AZ20238-INPND
2023-11-01AZ20240-INPND