Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chlorate

Bodcaw Rural Water System

NOTE: Bodcaw Rural Water System purchases water from Hope Water Light Comm. which is required to test for chlorate. Sample information shown below was taken by Hope Water Light Comm..

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND20ND
2014N/A00N/A
2015117.0 ppb6630.8 ppb - 260.0 ppb
2016N/A00N/A
2017N/A00N/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: Bodcaw Rural Water System purchases water from Hope Water Light Comm. which is required to test for chlorate. Sample information shown below was taken by Hope Water Light Comm..

Date Lab ID Result
2013-01-02130040001ND
2013-01-02130040003ND
2015-03-11Y150710039ND
2015-03-11Y150710037523.0 ppb
2015-03-11Y150710038ND
2015-03-11Y150710042ND
2015-03-11Y150710041ND
2015-03-11Y150710040ND
2015-06-10Y1516200141,390.0 ppb
2015-06-10Y151620015ND
2015-09-09Y152530016ND
2015-09-09Y152530015ND
2015-09-09Y152530017ND
2015-09-09Y152530013ND
2015-09-09Y1525300121,330.0 ppb
2015-09-09Y152530014ND