Chromium (total)

Hampton Shaler Water Authority

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	N/A	0	0	N/A
2015	0.163 ppb	21	6	ND - 0.850 ppb
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	ND	2	0	ND
2019	N/A	0	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2015-03-10	35179716011AM	ND
2015-03-10	35179716003AM	ND
2015-03-10	35179716001AM	0.270 ppb
2015-03-10	35179716007AM	0.590 ppb
2015-03-10	35179716009AM	ND
2015-03-10	35179716005AM	ND
2015-05-18	12815204	ND
2015-06-10	35193400001AM	ND
2015-06-10	35193400003AM	ND
2015-06-10	35193400005AM	ND
2015-06-10	35193400007AM	ND
2015-09-15	35208036005AM	ND
2015-09-15	35208036003AM	ND
2015-09-15	35208036011AM	ND
2015-09-15	35208036009AM	ND
2015-09-15	35208036007AM	0.850 ppb
2015-10-19	35213476001AM	0.680 ppb
2015-12-07	35220148007AM	ND
2015-12-07	35220148005AM	0.540 ppb
2015-12-07	35220148001AM	0.500 ppb
2015-12-07	35220148003AM	ND
2018-07-12	18G1213-01	ND
2018-07-26	18G2476-01	ND