Monochloroacetic acid

Beauregard Water Works District #3

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

276

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	ND	36	0	ND
2015	ND	48	0	ND
2016	ND	48	0	ND
2017	0.102 ppb	48	4	ND - 1.60 ppb
2018	0.149 ppb	48	10	ND - 1.30 ppb
2019	0.157 ppb	48	8	ND - 0.940 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
2014-03-25	1287963	ND
2014-03-25	1287965	ND
2014-03-25	1287966	ND
2014-03-25	1287967	ND
2014-03-25	1287968	ND
2014-03-25	1287969	ND
2014-03-25	1287963	ND
2014-03-25	1287965	ND
2014-03-25	1287966	ND
2014-03-25	1287967	ND
2014-03-25	1287968	ND
2014-03-25	1287969	ND
2014-06-25	1312926	ND
2014-06-25	1312927	ND
2014-06-25	1312928	ND
2014-06-25	1312929	ND
2014-06-25	1312930	ND
2014-06-25	1312931	ND
2014-06-25	1312926	ND
2014-06-25	1312927	ND
2014-06-25	1312928	ND
2014-06-25	1312929	ND
2014-06-25	1312930	ND
2014-06-25	1312931	ND
2014-12-03	1355129	ND
2014-12-03	1355130	ND
2014-12-03	1355131	ND
2014-12-03	1355132	ND
2014-12-03	1355133	ND
2014-12-03	1355134	ND
2014-12-03	1355129	ND
2014-12-03	1355130	ND
2014-12-03	1355131	ND
2014-12-03	1355132	ND
2014-12-03	1355133	ND
2014-12-03	1355134	ND
2015-03-24	1381708	ND
2015-03-24	1381712	ND
2015-03-24	1381713	ND
2015-03-24	1381714	ND
2015-03-24	1381715	ND
2015-03-24	1381716	ND
2015-03-24	1381708	ND
2015-03-24	1381712	ND
2015-03-24	1381713	ND
2015-03-24	1381714	ND
2015-03-24	1381715	ND
2015-03-24	1381716	ND
2015-06-23	1405172	ND
2015-06-23	1405174	ND
2015-06-23	1405175	ND
2015-06-23	1405176	ND
2015-06-23	1405177	ND
2015-06-23	1405178	ND
2015-06-23	1405172	ND
2015-06-23	1405174	ND
2015-06-23	1405175	ND
2015-06-23	1405176	ND
2015-06-23	1405177	ND
2015-06-23	1405178	ND
2015-09-24	1430267	ND
2015-09-24	1430270	ND
2015-09-24	1430271	ND
2015-09-24	1430272	ND
2015-09-24	1430273	ND
2015-09-24	1430274	ND
2015-09-24	1430267	ND
2015-09-24	1430270	ND
2015-09-24	1430271	ND
2015-09-24	1430272	ND
2015-09-24	1430273	ND
2015-09-24	1430274	ND
2015-12-09	1450373	ND
2015-12-09	1450374	ND
2015-12-09	1450375	ND
2015-12-09	1450376	ND
2015-12-09	1450377	ND
2015-12-09	1450378	ND
2015-12-09	1450373	ND
2015-12-09	1450374	ND
2015-12-09	1450375	ND
2015-12-09	1450376	ND
2015-12-09	1450377	ND
2015-12-09	1450378	ND
2016-03-22	1476807	ND
2016-03-22	1476808	ND
2016-03-22	1476809	ND
2016-03-22	1476810	ND
2016-03-22	1476811	ND
2016-03-22	1476812	ND
2016-03-22	1476807	ND
2016-03-22	1476808	ND
2016-03-22	1476809	ND
2016-03-22	1476810	ND
2016-03-22	1476811	ND
2016-03-22	1476812	ND
2016-06-27	1502670	ND
2016-06-27	1502671	ND
2016-06-27	1502672	ND
2016-06-27	1502673	ND
2016-06-27	1502674	ND
2016-06-27	1502675	ND
2016-06-27	1502670	ND
2016-06-27	1502671	ND
2016-06-27	1502672	ND
2016-06-27	1502673	ND
2016-06-27	1502674	ND
2016-06-27	1502675	ND
2016-09-27	1528120	ND
2016-09-27	1528121	ND
2016-09-27	1528122	ND
2016-09-27	1528123	ND
2016-09-27	1528124	ND
2016-09-27	1528125	ND
2016-09-27	1528120	ND
2016-09-27	1528121	ND
2016-09-27	1528122	ND
2016-09-27	1528123	ND
2016-09-27	1528124	ND
2016-09-27	1528125	ND
2016-12-19	1549784	ND
2016-12-19	1549785	ND
2016-12-19	1549786	ND
2016-12-19	1549787	ND
2016-12-19	1549788	ND
2016-12-19	1549789	ND
2016-12-19	1549784	ND
2016-12-19	1549785	ND
2016-12-19	1549786	ND
2016-12-19	1549787	ND
2016-12-19	1549788	ND
2016-12-19	1549789	ND
2017-03-02	35298738001	ND
2017-03-02	35298738002	ND
2017-03-02	35298738003	ND
2017-03-02	35298738004	ND
2017-03-02	35298738005	ND
2017-03-02	35298738006	ND
2017-03-02	35298738001	ND
2017-03-02	35298738002	ND
2017-03-02	35298738003	ND
2017-03-02	35298738004	ND
2017-03-02	35298738005	ND
2017-03-02	35298738006	ND
2017-06-01	35315802009	ND
2017-06-01	35315802010	ND
2017-06-01	35315802011	ND
2017-06-01	35315802012	ND
2017-06-01	35315802013	ND
2017-06-01	35315802014	1.60 ppb
2017-06-01	35315802009	ND
2017-06-01	35315802010	ND
2017-06-01	35315802011	ND
2017-06-01	35315802012	ND
2017-06-01	35315802013	ND
2017-06-01	35315802014	1.60 ppb
2017-09-07	35335094001	ND
2017-09-07	35335094002	ND
2017-09-07	35335094003	ND
2017-09-07	35335094004	ND
2017-09-07	35335094005	ND
2017-09-07	35335094006	ND
2017-09-07	35335094001	ND
2017-09-07	35335094002	ND
2017-09-07	35335094003	ND
2017-09-07	35335094004	ND
2017-09-07	35335094005	ND
2017-09-07	35335094006	ND
2017-12-06	35362366001	ND
2017-12-06	35362366002	ND
2017-12-06	35362366003	ND
2017-12-06	35362366004	ND
2017-12-06	35362366005	ND
2017-12-06	35362366006	0.850 ppb
2017-12-06	35362366001	ND
2017-12-06	35362366002	ND
2017-12-06	35362366003	ND
2017-12-06	35362366004	ND
2017-12-06	35362366005	ND
2017-12-06	35362366006	0.850 ppb
2018-03-07	35379177001	0.640 ppb
2018-03-07	35379177002	0.490 ppb
2018-03-07	35379177003	0.470 ppb
2018-03-07	35379177004	0.670 ppb
2018-03-07	35379177005	ND
2018-03-07	35379177006	ND
2018-03-07	35379177001	0.640 ppb
2018-03-07	35379177002	0.490 ppb
2018-03-07	35379177003	0.470 ppb
2018-03-07	35379177004	0.670 ppb
2018-03-07	35379177005	ND
2018-03-07	35379177006	ND
2018-06-13	35398741001	ND
2018-06-13	35398741002	ND
2018-06-13	35398741003	ND
2018-06-13	35398741004	ND
2018-06-13	35398741005	ND
2018-06-13	35398741006	ND
2018-06-13	35398741001	ND
2018-06-13	35398741002	ND
2018-06-13	35398741003	ND
2018-06-13	35398741004	ND
2018-06-13	35398741005	ND
2018-06-13	35398741006	ND
2018-09-04	35416221001	ND
2018-09-04	35416221002	ND
2018-09-04	35416221003	1.30 ppb
2018-09-04	35416226001	ND
2018-09-04	35416226002	ND
2018-09-04	35416226003	ND
2018-09-04	35416221001	ND
2018-09-04	35416221002	ND
2018-09-04	35416221003	1.30 ppb
2018-09-04	35416226001	ND
2018-09-04	35416226002	ND
2018-09-04	35416226003	ND
2018-12-12	35437374001	ND
2018-12-12	35437374002	ND
2018-12-12	35437374003	ND
2018-12-12	35437374004	ND
2018-12-12	35437374005	ND
2018-12-12	35437374006	ND
2018-12-12	35437374001	ND
2018-12-12	35437374002	ND
2018-12-12	35437374003	ND
2018-12-12	35437374004	ND
2018-12-12	35437374005	ND
2018-12-12	35437374006	ND
2019-03-11	35454715001	ND
2019-03-11	35454715002	ND
2019-03-11	35454716001	ND
2019-03-11	35454716002	ND
2019-03-11	35454716003	ND
2019-03-11	35454715001	ND
2019-03-11	35454715002	ND
2019-03-11	35454716001	ND
2019-03-11	35454716002	ND
2019-03-11	35454716003	ND
2019-03-14	35454715003	ND
2019-03-14	35454715003	ND
2019-06-03	35474282001	ND
2019-06-03	35474282002	ND
2019-06-03	35474282003	ND
2019-06-03	35474284001	ND
2019-06-03	35474284002	ND
2019-06-03	35474284003	ND
2019-06-03	35474282001	ND
2019-06-03	35474282002	ND
2019-06-03	35474282003	ND
2019-06-03	35474284001	ND
2019-06-03	35474284002	ND
2019-06-03	35474284003	ND
2019-09-03	35495824001	0.940 ppb
2019-09-03	35495831001	0.940 ppb
2019-09-03	35495831002	0.940 ppb
2019-09-03	35495831003	0.940 ppb
2019-09-03	35495824001	0.940 ppb
2019-09-03	35495831001	0.940 ppb
2019-09-03	35495831002	0.940 ppb
2019-09-03	35495831003	0.940 ppb
2019-09-26	35501131001	ND
2019-09-26	35501131002	ND
2019-09-26	35501131001	ND
2019-09-26	35501131002	ND
2019-12-02	35516981001	ND
2019-12-02	35516981002	ND
2019-12-02	35516981003	ND
2019-12-02	35516986001	ND
2019-12-02	35516986002	ND
2019-12-02	35516986003	ND
2019-12-02	35516981001	ND
2019-12-02	35516981002	ND
2019-12-02	35516981003	ND
2019-12-02	35516986001	ND
2019-12-02	35516986002	ND
2019-12-02	35516986003	ND