Monochloroacetic acid

Blanchard Water System

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

200

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	1.73 ppb	40	36	ND - 3.70 ppb
2015	1.94 ppb	32	24	ND - 3.60 ppb
2016	0.525 ppb	32	10	ND - 2.90 ppb
2017	0.806 ppb	32	6	ND - 5.70 ppb
2018	1.58 ppb	32	4	ND - 13.0 ppb
2019	5.06 ppb	32	30	ND - 15.5 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 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 system toxicity.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-03-07	680-99282-1	1.70 ppb
2014-03-07	680-99282-2	1.20 ppb
2014-03-07	680-99282-3	ND
2014-03-07	680-99282-4	1.20 ppb
2014-03-07	680-99282-1	1.70 ppb
2014-03-07	680-99282-2	1.20 ppb
2014-03-07	680-99282-3	ND
2014-03-07	680-99282-4	1.20 ppb
2014-05-05	680-101033-15	3.00 ppb
2014-05-05	680-101033-16	2.50 ppb
2014-05-05	680-101033-17	2.50 ppb
2014-05-05	680-101033-18	1.50 ppb
2014-05-05	680-101033-15	3.00 ppb
2014-05-05	680-101033-16	2.50 ppb
2014-05-05	680-101033-17	2.50 ppb
2014-05-05	680-101033-18	1.50 ppb
2014-06-03	680-102087-15	3.40 ppb
2014-06-03	680-102087-16	3.40 ppb
2014-06-03	680-102087-17	3.50 ppb
2014-06-03	680-102087-18	3.70 ppb
2014-06-03	680-102087-15	3.40 ppb
2014-06-03	680-102087-16	3.40 ppb
2014-06-03	680-102087-17	3.50 ppb
2014-06-03	680-102087-18	3.70 ppb
2014-09-02	680-104983-15	ND
2014-09-02	680-104983-16	1.60 ppb
2014-09-02	680-104983-17	1.80 ppb
2014-09-02	680-104983-18	1.50 ppb
2014-09-02	680-104983-15	ND
2014-09-02	680-104983-16	1.60 ppb
2014-09-02	680-104983-17	1.80 ppb
2014-09-02	680-104983-18	1.50 ppb
2014-12-02	680-107795-1	0.490 ppb
2014-12-02	680-107795-2	0.440 ppb
2014-12-02	680-107795-3	0.530 ppb
2014-12-02	680-107795-4	0.640 ppb
2014-12-02	680-107795-1	0.490 ppb
2014-12-02	680-107795-2	0.440 ppb
2014-12-02	680-107795-3	0.530 ppb
2014-12-02	680-107795-4	0.640 ppb
2015-03-04	680-110410-6	ND
2015-03-04	680-110410-7	ND
2015-03-04	680-110410-8	ND
2015-03-04	680-110410-9	ND
2015-03-04	680-110410-6	ND
2015-03-04	680-110410-7	ND
2015-03-04	680-110410-8	ND
2015-03-04	680-110410-9	ND
2015-06-02	680-113293-13	3.60 ppb
2015-06-02	680-113293-14	3.20 ppb
2015-06-02	680-113293-15	2.30 ppb
2015-06-02	680-113293-16	3.30 ppb
2015-06-02	680-113293-13	3.60 ppb
2015-06-02	680-113293-14	3.20 ppb
2015-06-02	680-113293-15	2.30 ppb
2015-06-02	680-113293-16	3.30 ppb
2015-09-01	680-116264-1	2.90 ppb
2015-09-01	680-116264-2	2.10 ppb
2015-09-01	680-116264-3	2.70 ppb
2015-09-01	680-116264-4	2.70 ppb
2015-09-01	680-116264-1	2.90 ppb
2015-09-01	680-116264-2	2.10 ppb
2015-09-01	680-116264-3	2.70 ppb
2015-09-01	680-116264-4	2.70 ppb
2015-12-01	680-119631-13	2.50 ppb
2015-12-01	680-119631-14	0.900 ppb
2015-12-01	680-119631-15	2.30 ppb
2015-12-01	680-119631-16	2.60 ppb
2015-12-01	680-119631-13	2.50 ppb
2015-12-01	680-119631-14	0.900 ppb
2015-12-01	680-119631-15	2.30 ppb
2015-12-01	680-119631-16	2.60 ppb
2016-03-01	680-122612-13	2.90 ppb
2016-03-01	680-122612-14	1.50 ppb
2016-03-01	680-122612-15	1.50 ppb
2016-03-01	680-122612-16	1.50 ppb
2016-03-01	680-122612-13	2.90 ppb
2016-03-01	680-122612-14	1.50 ppb
2016-03-01	680-122612-15	1.50 ppb
2016-03-01	680-122612-16	1.50 ppb
2016-06-07	680-126182-1	1.000 ppb
2016-06-07	680-126182-2	ND
2016-06-07	680-126182-3	ND
2016-06-07	680-126182-4	ND
2016-06-07	680-126182-1	1.000 ppb
2016-06-07	680-126182-2	ND
2016-06-07	680-126182-3	ND
2016-06-07	680-126182-4	ND
2016-09-07	680-129623-10	ND
2016-09-07	680-129623-11	ND
2016-09-07	680-129623-8	ND
2016-09-07	680-129623-9	ND
2016-09-07	680-129623-10	ND
2016-09-07	680-129623-11	ND
2016-09-07	680-129623-8	ND
2016-09-07	680-129623-9	ND
2016-12-06	680-132880-1	ND
2016-12-06	680-132880-2	ND
2016-12-06	680-132880-3	ND
2016-12-06	680-132880-4	ND
2016-12-06	680-132880-1	ND
2016-12-06	680-132880-2	ND
2016-12-06	680-132880-3	ND
2016-12-06	680-132880-4	ND
2017-03-09	35300169001	ND
2017-03-09	35300169002	ND
2017-03-09	35300169003	ND
2017-03-09	35300169004	ND
2017-03-09	35300169001	ND
2017-03-09	35300169002	ND
2017-03-09	35300169003	ND
2017-03-09	35300169004	ND
2017-06-16	35318967009	ND
2017-06-16	35318967010	ND
2017-06-16	35318967011	ND
2017-06-16	35318967012	ND
2017-06-16	35318967009	ND
2017-06-16	35318967010	ND
2017-06-16	35318967011	ND
2017-06-16	35318967012	ND
2017-09-22	35339070011	2.40 ppb
2017-09-22	35339070012	5.70 ppb
2017-09-22	35339070013	4.80 ppb
2017-09-22	35339070039	ND
2017-09-22	35339070011	2.40 ppb
2017-09-22	35339070012	5.70 ppb
2017-09-22	35339070013	4.80 ppb
2017-09-22	35339070039	ND
2017-12-20	35364996001	ND
2017-12-20	35364996002	ND
2017-12-20	35364996003	ND
2017-12-20	35364996004	ND
2017-12-20	35364996001	ND
2017-12-20	35364996002	ND
2017-12-20	35364996003	ND
2017-12-20	35364996004	ND
2018-03-27	35382529001	ND
2018-03-27	35382529002	ND
2018-03-27	35382529003	ND
2018-03-27	35382529004	ND
2018-03-27	35382529001	ND
2018-03-27	35382529002	ND
2018-03-27	35382529003	ND
2018-03-27	35382529004	ND
2018-06-22	35400070001	ND
2018-06-22	35400070002	ND
2018-06-22	35400070003	ND
2018-06-22	35400070004	ND
2018-06-22	35400070001	ND
2018-06-22	35400070002	ND
2018-06-22	35400070003	ND
2018-06-22	35400070004	ND
2018-09-11	35417283001	ND
2018-09-11	35417283002	ND
2018-09-11	35417283003	ND
2018-09-11	35417283004	ND
2018-09-11	35417283001	ND
2018-09-11	35417283002	ND
2018-09-11	35417283003	ND
2018-09-11	35417283004	ND
2018-12-06	35435843001	12.2 ppb
2018-12-06	35435843002	ND
2018-12-06	35435843003	13.0 ppb
2018-12-06	35435843004	ND
2018-12-06	35435843001	12.2 ppb
2018-12-06	35435843002	ND
2018-12-06	35435843003	13.0 ppb
2018-12-06	35435843004	ND
2019-03-01	35451811001	1.80 ppb
2019-03-01	35451811002	1.60 ppb
2019-03-01	35451811003	1.70 ppb
2019-03-01	35451811004	1.60 ppb
2019-03-01	35451811001	1.80 ppb
2019-03-01	35451811002	1.60 ppb
2019-03-01	35451811003	1.70 ppb
2019-03-01	35451811004	1.60 ppb
2019-06-20	35477232001	15.0 ppb
2019-06-20	35477232002	14.8 ppb
2019-06-20	35477232003	15.1 ppb
2019-06-20	35477232004	15.5 ppb
2019-06-20	35477232001	15.0 ppb
2019-06-20	35477232002	14.8 ppb
2019-06-20	35477232003	15.1 ppb
2019-06-20	35477232004	15.5 ppb
2019-09-18	35499049001	2.80 ppb
2019-09-18	35499049002	2.20 ppb
2019-09-18	35499049003	2.60 ppb
2019-09-18	35499049004	2.70 ppb
2019-09-18	35499049001	2.80 ppb
2019-09-18	35499049002	2.20 ppb
2019-09-18	35499049003	2.60 ppb
2019-09-18	35499049004	2.70 ppb
2019-12-02	35516626001	1.30 ppb
2019-12-02	35516626002	1.20 ppb
2019-12-02	35516626003	1.000 ppb
2019-12-02	35516626004	ND
2019-12-02	35516626001	1.30 ppb
2019-12-02	35516626002	1.20 ppb
2019-12-02	35516626003	1.000 ppb
2019-12-02	35516626004	ND