Chlorate

Dan River Water Inc

NOTE: Dan River Water Inc purchases water from City of Eden which is required to test for chlorate. Sample information shown below was taken by City of Eden.

Chlorate forms in drinking water as a byproduct of disinfection. Chlorate impairs thyroid function, making chlorate exposure most harmful during pregnancy and childhood. Read More.

In 2002, California scientists proposed an advisory value, called an action level, for chlorate at 200 parts per billion. Between 2013 and 2015, the EPA collected data through the Unregulated Contaminant Monitoring Rule program and found that over 15 percent of water tests from 38 percent of utilities had chlorate levels above a health-protective concentration, which federal scientists defined as 210 parts per billion, nearly equivalent to the California advisory value.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	6	ND
2015	ND	6	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	N/A	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 210 ppb

The EWG Health Guideline of 210 ppb for chlorate was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against hormone disruption.

ppb = parts per billion

All test results

NOTE: Dan River Water Inc purchases water from City of Eden which is required to test for chlorate. Sample information shown below was taken by City of Eden.

Date	Lab ID	Result
2013-10-02	35110786003AM	ND
2013-10-02	35110786001AM	ND
2014-01-06	35121859001AM	ND
2014-01-06	35121859003AM	ND
2014-04-02	14041515-002	ND
2014-04-02	14041515-001	ND
2014-07-07	35145016003AM	ND
2014-07-07	35145016001AM	ND