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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Eastern Municipal Water District

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

 

394

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20148.92 ppb6042ND - 34.0 ppb
20159.98 ppb7352ND - 44.0 ppb
20162.06 ppb6812ND - 25.0 ppb
20173.92 ppb6113ND - 53.0 ppb
2018ND640ND
20192.16 ppb6820ND - 20.0 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
2014-01-024790-081-0000ND
2014-01-024790-104-0000ND
2014-01-064790-063-0750ND
2014-02-034790-063-074010.00 ppb
2014-02-034790-081-07258.30 ppb
2014-03-034790-063-080020.0 ppb
2014-03-034790-081-081814.0 ppb
2014-03-174790-101-1422ND
2014-03-174790-102-1422ND
2014-03-184790-103-084914.0 ppb
2014-03-184790-104-105514.0 ppb
2014-03-184790-107-1325ND
2014-03-184790-108-150428.0 ppb
2014-03-184790-109-115013.0 ppb
2014-03-184790-111-14205.70 ppb
2014-03-184790-113-094412.0 ppb
2014-03-194790-106-14205.20 ppb
2014-03-194790-110-1420ND
2014-03-194790-112-1420ND
2014-04-014790-063-0945ND
2014-04-014790-081-0807ND
2014-05-054790-063-071534.0 ppb
2014-05-054790-081-080022.0 ppb
2014-06-024790-063-081015.0 ppb
2014-06-024790-081-08306.00 ppb
2014-06-064790-101-092913.0 ppb
2014-06-064790-102-083814.0 ppb
2014-06-064790-111-10186.60 ppb
2014-06-174790-113-000018.0 ppb
2014-06-184790-112-0000ND
2014-06-204790-106-0000ND
2014-06-204790-108-000017.0 ppb
2014-07-014790-063-082010.00 ppb
2014-07-014790-081-08237.00 ppb
2014-08-044790-063-07557.80 ppb
2014-08-044790-081-083031.0 ppb
2014-08-184790-071-0900ND
2014-09-024790-063-070514.0 ppb
2014-09-024790-104-083317.0 ppb
2014-09-154790-101-07597.70 ppb
2014-09-154790-102-075911.0 ppb
2014-09-164790-104-11008.80 ppb
2014-09-174790-103-08599.50 ppb
2014-09-174790-107-08593.60 ppb
2014-09-174790-109-08596.70 ppb
2014-09-174790-111-085910.00 ppb
2014-09-174790-112-101610.00 ppb
2014-09-184790-110-10372.80 ppb
2014-10-014790-063-082628.0 ppb
2014-10-014790-081-095613.0 ppb
2014-12-014790-063-07306.80 ppb
2014-12-014790-081-09157.60 ppb
2014-12-084790-101-1039ND
2014-12-084790-102-09272.40 ppb
2014-12-084790-111-0824ND
2014-12-094790-104-10396.70 ppb
2014-12-104790-106-1328ND
2014-12-104790-112-0933ND
2014-12-114790-103-081524.0 ppb
2014-12-114790-110-0854ND
2015-01-054790-063-0735ND
2015-01-054790-081-0800ND
2015-02-024790-063-074015.0 ppb
2015-02-024790-081-083014.0 ppb
2015-03-024790-063-073512.0 ppb
2015-03-024790-081-0928ND
2015-03-164790-101-104812.0 ppb
2015-03-164790-102-09166.30 ppb
2015-03-164790-111-1234ND
2015-03-174790-103-095517.0 ppb
2015-03-174790-104-12507.90 ppb
2015-03-174790-109-11535.10 ppb
2015-03-174790-113-10272.30 ppb
2015-03-184790-106-08423.30 ppb
2015-03-184790-108-14093.40 ppb
2015-03-204790-107-0000ND
2015-03-204790-110-0000ND
2015-03-204790-112-0000ND
2015-04-014790-063-000020.0 ppb
2015-04-014790-081-150035.0 ppb
2015-05-044790-063-074528.0 ppb
2015-05-044790-081-083840.0 ppb
2015-06-014790-063-0725ND
2015-06-014790-081-0802ND
2015-06-154790-101-0959ND
2015-06-154790-102-095917.0 ppb
2015-06-154790-108-095916.0 ppb
2015-06-154790-111-0959ND
2015-06-164790-106-101135.0 ppb
2015-06-164790-112-1011ND
2015-06-174790-104-11105.00 ppb
2015-06-174790-107-1110ND
2015-06-174790-109-111014.0 ppb
2015-06-174790-113-11105.00 ppb
2015-06-184790-103-1240ND
2015-06-184790-110-12403.40 ppb
2015-07-014790-063-09009.20 ppb
2015-07-014790-081-075510.00 ppb
2015-08-044790-063-101542.0 ppb
2015-08-044790-071-08303.30 ppb
2015-08-044790-081-082027.0 ppb
2015-09-014790-063-081634.0 ppb
2015-09-014790-081-074633.0 ppb
2015-09-144790-101-10267.20 ppb
2015-09-144790-102-08356.50 ppb
2015-09-144790-103-1435ND
2015-09-154790-104-102028.0 ppb
2015-09-154790-107-1350ND
2015-09-154790-108-14432.20 ppb
2015-09-154790-109-12082.90 ppb
2015-09-154790-111-1418ND
2015-09-154790-113-11254.20 ppb
2015-09-164790-106-090429.0 ppb
2015-09-164790-112-12558.00 ppb
2015-09-174790-110-13472.70 ppb
2015-10-054790-063-073812.0 ppb
2015-10-054790-081-08059.20 ppb
2015-11-024790-063-074021.0 ppb
2015-11-024790-081-083223.0 ppb
2015-12-014790-063-071620.0 ppb
2015-12-024790-081-084244.0 ppb
2015-12-144790-104-12055.50 ppb
2015-12-144790-107-09033.20 ppb
2015-12-144790-109-1015ND
2015-12-144790-113-1040ND
2015-12-154790-101-08504.50 ppb
2015-12-154790-102-12103.20 ppb
2015-12-154790-111-14442.60 ppb
2015-12-164790-106-09264.90 ppb
2015-12-164790-108-1437ND
2015-12-164790-112-1333ND
2015-12-184790-103-14184.70 ppb
2015-12-184790-110-14184.50 ppb
2016-01-044790-063-090024.0 ppb
2016-01-044790-081-084525.0 ppb
2016-02-014790-063-080013.0 ppb
2016-03-024790-063-0756ND
2016-03-024790-081-0835ND
2016-03-214790-101-11209.00 ppb
2016-03-214790-102-0858ND
2016-03-214790-111-0811ND
2016-03-224790-104-11552.20 ppb
2016-03-224790-113-1322ND
2016-03-244790-103-14052.60 ppb
2016-03-244790-110-13192.30 ppb
2016-04-044790-063-08052.10 ppb
2016-04-044790-081-08482.80 ppb
2016-05-024790-063-102018.0 ppb
2016-05-024790-081-074518.0 ppb
2016-06-014790-063-0756ND
2016-06-014790-081-0809ND
2016-06-204790-101-0854ND
2016-06-204790-102-0715ND
2016-06-204790-111-0634ND
2016-06-214790-104-0900ND
2016-06-214790-107-1326ND
2016-06-214790-108-1401ND
2016-06-214790-109-1047ND
2016-06-214790-113-1125ND
2016-06-224790-103-1154ND
2016-06-224790-106-1230ND
2016-06-224790-112-0833ND
2016-06-234790-110-1236ND
2016-07-054790-063-1026ND
2016-07-054790-081-0836ND
2016-08-014790-071-0835ND
2016-08-014790-081-0830ND
2016-08-024790-063-0840ND
2016-09-014790-063-080721.0 ppb
2016-09-014790-081-0946ND
2016-09-194790-101-1424ND
2016-09-194790-102-0915ND
2016-09-194790-111-0805ND
2016-09-204790-104-1020ND
2016-09-204790-107-1329ND
2016-09-204790-113-1158ND
2016-09-214790-106-0817ND
2016-09-214790-108-1459ND
2016-09-214790-112-1229ND
2016-09-224790-103-0000ND
2016-09-224790-109-0000ND
2016-09-224790-110-0000ND
2016-10-034790-063-0720ND
2016-10-034790-081-0752ND
2016-10-044790-063-0720ND
2016-11-014790-063-0915ND
2016-11-014790-081-0818ND
2016-12-054790-063-0755ND
2016-12-054790-081-0723ND
2016-12-134790-101-0000ND
2016-12-134790-102-0000ND
2016-12-134790-103-0000ND
2016-12-134790-106-0000ND
2016-12-134790-107-0000ND
2016-12-134790-108-0000ND
2016-12-134790-109-0000ND
2016-12-134790-110-0000ND
2016-12-134790-111-0000ND
2016-12-134790-112-0000ND
2016-12-134790-113-0000ND
2016-12-144790-104-1315ND
2017-01-034790-081-0855ND
2017-01-044790-063-0740ND
2017-02-014790-063-0803ND
2017-02-014790-081-0600ND
2017-03-014790-063-0656ND
2017-03-014790-081-0625ND
2017-03-204790-101-1111ND
2017-03-204790-102-0822ND
2017-03-214790-103-0920ND
2017-03-214790-104-1225ND
2017-03-214790-108-1447ND
2017-03-214790-111-1347ND
2017-03-214790-113-1124ND
2017-03-224790-106-0940ND
2017-03-224790-112-1305ND
2017-03-234790-107-0000ND
2017-03-234790-109-0000ND
2017-03-234790-110-0000ND
2017-04-034790-063-0000ND
2017-04-034790-081-0000ND
2017-05-014790-063-0831ND
2017-05-014790-081-0854ND
2017-06-014790-063-0815ND
2017-06-014790-081-0813ND
2017-06-194790-101-1023ND
2017-06-194790-102-0900ND
2017-06-194790-111-0802ND
2017-06-204790-104-1047ND
2017-06-204790-106-12512.80 ppb
2017-06-204790-107-1337ND
2017-06-204790-108-1420ND
2017-06-204790-113-1153ND
2017-06-214790-106-1008ND
2017-06-214790-112-1237ND
2017-06-224790-103-0000ND
2017-06-224790-110-0000ND
2017-07-054790-063-0741ND
2017-07-054790-081-0821ND
2017-08-014790-063-1030ND
2017-08-014790-081-1126ND
2017-08-024790-071-0815ND
2017-09-054790-063-072518.0 ppb
2017-09-054790-081-082428.0 ppb
2017-09-184790-101-12252.50 ppb
2017-09-184790-102-08509.30 ppb
2017-09-184790-108-13387.60 ppb
2017-09-194790-104-111048.0 ppb
2017-09-194790-107-1304ND
2017-09-194790-109-11563.40 ppb
2017-09-194790-111-1430ND
2017-09-194790-113-10262.10 ppb
2017-09-204790-103-13476.50 ppb
2017-09-204790-106-112719.0 ppb
2017-09-204790-112-0851ND
2017-09-214790-110-0805ND
2017-10-024790-063-080639.0 ppb
2017-10-024790-081-084253.0 ppb
2017-11-204790-081-0628ND
2017-12-044790-063-0805ND
2017-12-044790-081-0840ND
2017-12-114790-081-0755ND
2018-01-024790-063-0825ND
2018-01-024790-081-0618ND
2018-02-054790-063-0807ND
2018-02-054790-081-0819ND
2018-03-054790-081-0835ND
2018-03-194790-101-1108ND
2018-03-194790-102-0813ND
2018-03-204790-081-1150ND
2018-03-204790-103-0848ND
2018-03-204790-108-1344ND
2018-03-204790-111-1247ND
2018-03-204790-113-1040ND
2018-03-214790-106-0955ND
2018-03-214790-112-1302ND
2018-03-224790-107-0810ND
2018-03-224790-109-0836ND
2018-03-224790-110-1342ND
2018-04-024790-063-0755ND
2018-04-024790-081-0805ND
2018-05-014790-063-0708ND
2018-05-014790-081-0811ND
2018-06-044790-063-0805ND
2018-06-044790-081-0840ND
2018-06-184790-101-1005ND
2018-06-184790-102-0845ND
2018-06-184790-111-0800ND
2018-06-194790-081-1015ND
2018-06-194790-107-1259ND
2018-06-194790-108-1338ND
2018-06-194790-109-1212ND
2018-06-194790-113-1120ND
2018-06-204790-103-1120ND
2018-06-204790-106-0900ND
2018-06-204790-110-1045ND
2018-06-204790-112-1237ND
2018-07-024790-063-0856ND
2018-07-024790-081-0814ND
2018-09-044790-063-0815ND
2018-09-044790-081-0745ND
2018-09-174790-101-1209ND
2018-09-174790-102-0830ND
2018-09-174790-108-1321ND
2018-09-184790-081-1023ND
2018-09-184790-107-1222ND
2018-09-184790-109-1102ND
2018-09-184790-111-1357ND
2018-09-194790-106-0825ND
2018-09-194790-112-1232ND
2018-10-014790-063-0654ND
2018-10-014790-081-0752ND
2018-12-034790-063-0850ND
2018-12-034790-081-0725ND
2018-12-104790-101-1223ND
2018-12-104790-102-0839ND
2018-12-104790-108-1349ND
2018-12-114790-081-1012ND
2018-12-114790-107-1230ND
2018-12-114790-109-1100ND
2018-12-114790-111-1355ND
2018-12-124790-106-0805ND
2018-12-124790-112-1218ND
2018-12-134790-103-0756ND
2018-12-134790-110-0909ND
2018-12-134790-113-0824ND
2019-01-024790-081-0727ND
2019-01-074790-063-0715ND
2019-02-044790-063-0710ND
2019-02-044790-081-0707ND
2019-03-044790-063-0818ND
2019-03-184790-101-1045ND
2019-03-184790-102-0817ND
2019-03-194790-104-1143ND
2019-03-194790-107-1531ND
2019-03-194790-108-1326ND
2019-03-194790-109-1601ND
2019-03-194790-111-1242ND
2019-03-194790-113-1047ND
2019-03-204790-103-0902ND
2019-03-204790-106-0925ND
2019-03-204790-112-1306ND
2019-03-214790-110-1205ND
2019-04-014790-063-0730ND
2019-04-014790-081-0707ND
2019-05-064790-063-1301ND
2019-05-064790-081-1422ND
2019-06-034790-063-1315ND
2019-06-034790-081-1435ND
2019-06-174790-101-10115.30 ppb
2019-06-174790-102-09046.60 ppb
2019-06-184790-104-10074.80 ppb
2019-06-184790-107-1159ND
2019-06-184790-108-12373.60 ppb
2019-06-184790-113-1055ND
2019-06-194790-106-09456.80 ppb
2019-06-194790-112-12284.70 ppb
2019-06-204790-103-1325ND
2019-06-204790-109-1210ND
2019-06-204790-110-1220ND
2019-06-204790-111-1130ND
2019-07-084790-063-1515ND
2019-07-114790-081-1418ND
2019-08-054790-063-140420.0 ppb
2019-09-034790-063-1411ND
2019-09-034790-081-15235.60 ppb
2019-09-164790-104-1405ND
2019-09-164790-113-1333ND
2019-09-174790-101-1228ND
2019-09-174790-102-0945ND
2019-09-174790-106-1010ND
2019-09-174790-108-1010ND
2019-09-174790-109-1228ND
2019-09-174790-111-1035ND
2019-09-174790-112-0935ND
2019-09-184790-106-09226.40 ppb
2019-09-184790-107-11462.70 ppb
2019-09-184790-109-1030ND
2019-09-194790-103-0754ND
2019-09-194790-106-0832ND
2019-09-194790-110-0832ND
2019-10-084790-063-1425ND
2019-10-084790-081-1519ND
2019-11-044790-063-131412.0 ppb
2019-11-044790-081-14047.40 ppb
2019-12-054790-081-132415.0 ppb
2019-12-164790-104-14297.50 ppb
2019-12-174790-101-10305.50 ppb
2019-12-174790-102-09095.40 ppb
2019-12-184790-103-10066.00 ppb
2019-12-184790-106-08528.00 ppb
2019-12-184790-108-13145.70 ppb
2019-12-184790-112-0940ND
2019-12-194790-110-12058.00 ppb