Chromium (hexavalent)

Manchester Water Department

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

MORE ABOUT THIS CONTAMINANT

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	0.279 ppb	22	21	ND - 0.810 ppb
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	N/A	0	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-03-03	35128814009AM	0.750 ppb
2014-03-03	35128814005AM	0.0330 ppb
2014-03-03	35128814007AM	0.0390 ppb
2014-03-03	35128814003AM	0.0720 ppb
2014-03-03	35128814001AM	0.0900 ppb
2014-03-04	35128919001AM	0.810 ppb
2014-03-04	35128919003AM	0.760 ppb
2014-03-31	35132407001AM	0.320 ppb
2014-03-31	35132407003AM	0.200 ppb
2014-06-17	35142680001AM	ND
2014-06-17	35142680003AM	0.0410 ppb
2014-09-08	35154373003AM	0.0480 ppb
2014-09-08	35154373001AM	0.0330 ppb
2014-09-09	35154734001AM	0.710 ppb
2014-09-09	35154734003AM	0.720 ppb
2014-09-10	35154778001AM	0.320 ppb
2014-09-10	35154778003AM	0.160 ppb
2014-09-16	35155693001AM	0.0590 ppb
2014-09-16	35155693003AM	0.0820 ppb
2014-09-16	35155693005AM	0.750 ppb
2014-12-15	35168214001AM	0.0650 ppb
2014-12-15	35168214003AM	0.0680 ppb