Bromochloroacetic acid

Yelm City Of

Bromochloroacetic acid is formed when chlorine or other disinfectants are used to treat drinking water. Bromochloroacetic acid and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.

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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
2013	N/A	0	0	N/A
2014	ND	12	0	ND
2015	1.14 ppb	16	11	ND - 2.10 ppb
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	1.30 ppb	2	2	1.20 ppb - 1.40 ppb
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 bromochloroacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-06-05	83152	ND
2014-06-05	83150	ND
2014-06-05	83151	ND
2014-06-05	83149	ND
2014-07-17	83277	ND
2014-07-17	83275	ND
2014-07-17	83276	ND
2014-07-17	83278	ND
2014-10-16	83745	ND
2014-10-16	83748	ND
2014-10-16	83746	ND
2014-10-16	83747	ND
2015-02-06	83965	1.30 ppb
2015-02-06	83962	1.30 ppb
2015-02-06	83964	ND
2015-02-06	83963	ND
2015-04-02	84080	ND
2015-04-02	84083	1.80 ppb
2015-04-02	84081	2.10 ppb
2015-04-02	84082	2.10 ppb
2015-07-13	84320	ND
2015-07-13	84319	1.40 ppb
2015-07-13	84321	1.60 ppb
2015-07-13	84318	1.60 ppb
2015-10-09	84655	ND
2015-10-09	84656	1.40 ppb
2015-10-09	84658	2.00 ppb
2015-10-09	84657	1.70 ppb
2016-08-11		ND
2016-08-11		ND
2017-08-08		ND
2017-08-08		ND
2018-10-04		1.40 ppb
2018-10-04		1.20 ppb