Know Your Environment. Protect Your Health.

Chromium (total)

Town of Hampstead

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20183.45 ppb113ND - 31.0 ppb
2019N/A00N/A
20201.000 ppb85ND - 4.00 ppb
20210.500 ppb84ND - 1.000 ppb
2022ND20ND
2023ND20ND

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
2018-06-04E054175_12ND
2018-09-05E055512_04ND
2018-09-05E055512_064.00 ppb
2018-09-05E055512_0831.0 ppb
2018-09-05E055512_10ND
2018-09-05E055512_15ND
2018-09-05E055512_18ND
2018-09-05E055512_20ND
2018-10-02E19001148003ND
2018-10-02E1900148002ND
2018-12-03E056641_023.00 ppb
2020-03-03E062383-061.000 ppb
2020-03-03E062383-181.000 ppb
2020-03-03E20002994004ND
2020-06-03E20003718002ND
2020-07-29E21000292002ND
2020-09-01E064325-041.000 ppb
2020-09-01E064325-111.000 ppb
2020-12-14E065517_024.00 ppb
2021-01-21E21001852002ND
2021-06-02E067105_141.000 ppb
2021-09-01E068099_051.000 ppb
2021-09-01E068099_061.000 ppb
2021-09-01E068099_12ND
2021-09-01E068099_15ND
2021-09-01E068099_16ND
2021-12-02E069059_021.000 ppb
2022-03-01E2200123702ND
2022-08-03E230002502ND
2023-03-01030123-316BB1-3ND
2023-12-04120423-316AA1-BB3ND