Chromium (hexavalent)

Water Authority of Western Nassau

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	0.303 ppb	10	9	ND - 0.620 ppb
2015	0.316 ppb	14	13	ND - 1.10 ppb
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
2014-12-23	35169517013AM	ND
2014-12-23	35169517001AM	0.370 ppb
2014-12-23	35169517007AM	0.0910 ppb
2014-12-23	35169517003AM	0.560 ppb
2014-12-23	35169517005AM	0.0370 ppb
2014-12-23	35169517011AM	0.390 ppb
2014-12-23	35169517009AM	0.620 ppb
2014-12-29	35169790005AM	0.210 ppb
2014-12-29	35169790001AM	0.510 ppb
2014-12-29	35169790003AM	0.240 ppb
2015-06-25	35195584001AM	0.0560 ppb
2015-06-25	35195584003AM	0.190 ppb
2015-07-21	35200053007AM	0.0380 ppb
2015-07-21	35200053005AM	1.10 ppb
2015-07-21	35200053003AM	0.630 ppb
2015-07-21	35200053013AM	ND
2015-07-23	35200053009AM	0.0860 ppb
2015-07-23	35200053001AM	0.370 ppb
2015-07-23	35200053011AM	0.310 ppb
2015-07-27	35200053017AM	0.260 ppb
2015-07-27	15080804-001	0.814 ppb
2015-07-27	35200053019AM	0.240 ppb
2015-11-12	35216561001AM	0.270 ppb
2015-11-12	35216561003AM	0.0540 ppb