Bromochloroacetic acid

City of Redmond Water System

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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191

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	0.332 ppb	31	7	ND - 1.80 ppb
2015	0.944 ppb	32	20	ND - 2.26 ppb
2016	0.957 ppb	32	15	ND - 3.18 ppb
2017	0.445 ppb	32	7	ND - 2.97 ppb
2018	0.298 ppb	32	6	ND - 2.30 ppb
2019	0.299 ppb	32	6	ND - 1.88 ppb

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
2014-01-08	00363	ND
2014-01-08	00364	ND
2014-01-08	00366	ND
2014-01-08	00367	ND
2014-01-08	00368	ND
2014-01-08	00370	1.20 ppb
2014-01-08	00365	ND
2014-04-09	06211	ND
2014-04-09	06214	ND
2014-04-09	06217	1.30 ppb
2014-04-09	06216	ND
2014-04-09	06215	ND
2014-04-09	06218	ND
2014-04-09	06213	1.80 ppb
2014-04-09	06212	ND
2014-07-09	12238	ND
2014-07-09	12237	1.50 ppb
2014-07-09	12234	ND
2014-07-09	12232	ND
2014-07-09	12231	ND
2014-07-09	12235	ND
2014-07-09	12233	1.80 ppb
2014-07-09	12236	ND
2014-10-08	18873	1.70 ppb
2014-10-08	18872	ND
2014-10-08	18870	ND
2014-10-08	18868	ND
2014-10-08	18871	ND
2014-10-08	18867	ND
2014-10-08	18869	1.000 ppb
2014-10-08	18874	ND
2015-01-07	15208	1.17 ppb
2015-01-07	15207	1.67 ppb
2015-01-07	15203	1.37 ppb
2015-01-07	15202	1.18 ppb
2015-01-07	15206	1.28 ppb
2015-01-07	15201	1.08 ppb
2015-01-07	15204	1.000 ppb
2015-01-07	15205	1.28 ppb
2015-04-08	88707	1.64 ppb
2015-04-08	88708	ND
2015-04-08	88706	ND
2015-04-08	88705	ND
2015-04-08	88704	ND
2015-04-08	88703	1.81 ppb
2015-04-08	88701	ND
2015-04-08	88702	ND
2015-07-08	37607	1.35 ppb
2015-07-08	37608	ND
2015-07-08	37606	ND
2015-07-08	37605	ND
2015-07-08	37604	ND
2015-07-08	37603	2.26 ppb
2015-07-08	37601	ND
2015-07-08	37602	1.44 ppb
2015-10-07	18907	1.57 ppb
2015-10-07	18908	ND
2015-10-07	18906	2.05 ppb
2015-10-07	18905	1.82 ppb
2015-10-07	18904	1.54 ppb
2015-10-07	18903	2.08 ppb
2015-10-07	18901	1.12 ppb
2015-10-07	18902	1.51 ppb
2016-01-06		1.79 ppb
2016-01-06		2.48 ppb
2016-01-06		2.68 ppb
2016-01-06		1.25 ppb
2016-01-06		3.17 ppb
2016-01-06		1.15 ppb
2016-01-06		2.44 ppb
2016-01-06		ND
2016-04-08		1.02 ppb
2016-04-08		ND
2016-04-08		ND
2016-04-08		ND
2016-04-08		1.23 ppb
2016-04-08		ND
2016-04-08		2.25 ppb
2016-04-08		3.18 ppb
2016-07-06		ND
2016-07-06		ND
2016-07-06		2.38 ppb
2016-07-06		ND
2016-07-06		ND
2016-07-06		ND
2016-07-06		ND
2016-07-06		1.85 ppb
2016-10-04		1.69 ppb
2016-10-04		ND
2016-10-04		ND
2016-10-04		2.07 ppb
2016-10-04		ND
2016-10-04		ND
2016-10-04		ND
2016-10-04		ND
2017-01-11		ND
2017-01-11		ND
2017-01-11		ND
2017-01-11		ND
2017-01-11		ND
2017-01-11		ND
2017-01-11		ND
2017-01-11		2.15 ppb
2017-04-11		ND
2017-04-11		ND
2017-04-11		ND
2017-04-11		ND
2017-04-11		ND
2017-04-11		ND
2017-04-11		2.47 ppb
2017-04-11		2.97 ppb
2017-07-05		ND
2017-07-05		ND
2017-07-05		1.04 ppb
2017-07-05		ND
2017-07-05		ND
2017-07-05		ND
2017-07-05		ND
2017-07-05		2.33 ppb
2017-10-11		1.77 ppb
2017-10-11		ND
2017-10-11		ND
2017-10-11		ND
2017-10-11		ND
2017-10-11		ND
2017-10-11		1.52 ppb
2017-10-11		ND
2018-01-10		ND
2018-01-10		ND
2018-01-10		1.48 ppb
2018-01-10		ND
2018-01-10		ND
2018-01-10		ND
2018-01-10		ND
2018-01-10		ND
2018-04-04		ND
2018-04-04		ND
2018-04-04		1.84 ppb
2018-04-04		ND
2018-04-04		ND
2018-04-04		ND
2018-04-04		ND
2018-04-04		1.20 ppb
2018-07-03		ND
2018-07-03		ND
2018-07-03		2.30 ppb
2018-07-03		ND
2018-07-03		ND
2018-07-03		ND
2018-07-03		ND
2018-07-03		1.17 ppb
2018-10-03		ND
2018-10-03		ND
2018-10-03		1.56 ppb
2018-10-03		ND
2018-10-03		ND
2018-10-03		ND
2018-10-03		ND
2018-10-03		ND
2019-01-09		ND
2019-01-09		ND
2019-01-09		1.83 ppb
2019-01-09		ND
2019-01-09		ND
2019-01-09		ND
2019-01-09		ND
2019-01-09		ND
2019-04-03		ND
2019-04-03		ND
2019-04-03		1.74 ppb
2019-04-03		ND
2019-04-03		ND
2019-04-03		ND
2019-04-03		ND
2019-04-03		1.20 ppb
2019-07-01		ND
2019-07-01		ND
2019-07-01		1.85 ppb
2019-07-01		ND
2019-07-01		ND
2019-07-01		ND
2019-07-01		ND
2019-07-01		1.06 ppb
2019-10-02		ND
2019-10-02		ND
2019-10-02		1.88 ppb
2019-10-02		ND
2019-10-02		ND
2019-10-02		ND
2019-10-02		ND
2019-10-02		ND