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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of San Juan Capistrano

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

 

193

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND320ND
2015ND320ND
2016ND320ND
2017ND320ND
2018ND320ND
20190.879 ppb335ND - 9.00 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
2014-02-109590-801-0727ND
2014-02-109590-802-1231ND
2014-02-109590-803-0748ND
2014-02-109590-804-0858ND
2014-02-109590-805-1309ND
2014-02-109590-806-1150ND
2014-02-109590-807-1120ND
2014-02-109590-808-1107ND
2014-05-129590-801-0808ND
2014-05-129590-802-0833ND
2014-05-129590-803-0819ND
2014-05-129590-804-0939ND
2014-05-129590-805-1032ND
2014-05-129590-806-1159ND
2014-05-129590-807-1101ND
2014-05-129590-808-1114ND
2014-08-119590-801-0738ND
2014-08-119590-802-0833ND
2014-08-119590-803-0815ND
2014-08-119590-804-0848ND
2014-08-119590-805-1121ND
2014-08-119590-806-1029ND
2014-08-119590-807-0959ND
2014-08-119590-808-0947ND
2014-11-109590-801-0645ND
2014-11-109590-802-1512ND
2014-11-109590-803-1450ND
2014-11-109590-804-0815ND
2014-11-109590-805-1340ND
2014-11-109590-806-1410ND
2014-11-109590-807-1000ND
2014-11-109590-808-1430ND
2015-02-099590-801-1407ND
2015-02-099590-802-1000ND
2015-02-099590-803-1430ND
2015-02-099590-804-1020ND
2015-02-099590-805-1146ND
2015-02-099590-806-1120ND
2015-02-099590-807-1100ND
2015-02-099590-808-1045ND
2015-05-119590-801-0901ND
2015-05-119590-802-1500ND
2015-05-119590-803-1440ND
2015-05-119590-804-0937ND
2015-05-119590-805-1352ND
2015-05-119590-806-1227ND
2015-05-119590-807-1140ND
2015-05-119590-808-1123ND
2015-08-109590-801-0827ND
2015-08-109590-802-0839ND
2015-08-109590-803-0850ND
2015-08-109590-804-0918ND
2015-08-109590-805-1208ND
2015-08-109590-806-1057ND
2015-08-109590-807-1025ND
2015-08-109590-808-1015ND
2015-11-119590-801-0818ND
2015-11-119590-802-0750ND
2015-11-119590-803-0720ND
2015-11-119590-804-0844ND
2015-11-119590-805-1113ND
2015-11-119590-806-1045ND
2015-11-119590-807-1028ND
2015-11-119590-808-1008ND
2016-02-039590-801-1150ND
2016-02-039590-802-0806ND
2016-02-039590-803-0752ND
2016-02-039590-804-0858ND
2016-02-039590-805-1131ND
2016-02-039590-806-1051ND
2016-02-039590-807-1017ND
2016-02-039590-808-1006ND
2016-05-109590-801-0747ND
2016-05-109590-802-0759ND
2016-05-109590-803-0809ND
2016-05-109590-804-0830ND
2016-05-109590-805-1100ND
2016-05-109590-806-1010ND
2016-05-109590-807-0932ND
2016-05-109590-808-0920ND
2016-08-099590-801-0703ND
2016-08-099590-802-0719ND
2016-08-099590-803-0730ND
2016-08-099590-804-0755ND
2016-08-099590-805-1002ND
2016-08-099590-806-0912ND
2016-08-099590-807-0843ND
2016-08-099590-808-1019ND
2016-11-169590-801-0753ND
2016-11-169590-802-0815ND
2016-11-169590-803-0836ND
2016-11-169590-804-0903ND
2016-11-169590-805-1058ND
2016-11-169590-806-1020ND
2016-11-169590-807-0951ND
2016-11-169590-808-0926ND
2017-02-189590-801-0925ND
2017-02-189590-802-0740ND
2017-02-189590-803-0802ND
2017-02-189590-804-0822ND
2017-02-189590-805-1030ND
2017-02-189590-806-1009ND
2017-02-189590-807-0945ND
2017-02-189590-808-0903ND
2017-05-099590-801-0831ND
2017-05-099590-802-0850ND
2017-05-099590-803-0906ND
2017-05-099590-804-0933ND
2017-05-099590-805-1234ND
2017-05-099590-806-1132ND
2017-05-099590-807-1047ND
2017-05-099590-808-1032ND
2017-08-149590-801-0747ND
2017-08-149590-802-0812ND
2017-08-149590-803-0836ND
2017-08-149590-804-0931ND
2017-08-149590-805-1104ND
2017-08-149590-806-0845ND
2017-08-149590-807-0810ND
2017-08-149590-808-1054ND
2017-11-149590-801-0743ND
2017-11-149590-802-0809ND
2017-11-149590-803-0830ND
2017-11-149590-804-0913ND
2017-11-149590-805-1250ND
2017-11-149590-806-1127ND
2017-11-149590-807-1056ND
2017-11-149590-808-1030ND
2018-02-149590-801-0737ND
2018-02-149590-802-0815ND
2018-02-149590-803-0837ND
2018-02-149590-804-0900ND
2018-02-149590-805-1047ND
2018-02-149590-806-1018ND
2018-02-149590-807-0949ND
2018-02-149590-808-0929ND
2018-05-159590-801-0825ND
2018-05-159590-802-0847ND
2018-05-159590-803-0910ND
2018-05-159590-804-0950ND
2018-05-159590-805-1319ND
2018-05-159590-806-1153ND
2018-05-159590-807-1124ND
2018-05-159590-808-1058ND
2018-08-149590-801-0803ND
2018-08-149590-802-0830ND
2018-08-149590-803-0848ND
2018-08-149590-804-0930ND
2018-08-149590-805-1254ND
2018-08-149590-806-1127ND
2018-08-149590-807-1058ND
2018-08-149590-808-1038ND
2018-11-139590-801-0912ND
2018-11-139590-802-0939ND
2018-11-139590-803-1002ND
2018-11-139590-804-1021ND
2018-11-139590-805-1200ND
2018-11-139590-806-1130ND
2018-11-139590-807-1107ND
2018-11-139590-808-1043ND
2019-02-125867-801-1415ND
2019-02-125867-805-0755ND
2019-02-125867-806-0930ND
2019-02-125867-808-1015ND
2019-02-205867-801-1115ND
2019-02-205867-802-1100ND
2019-02-205867-803-1040ND
2019-02-205867-804-0854ND
2019-02-205867-807-1055ND
2019-05-145867-805-0735ND
2019-05-145867-806-0815ND
2019-05-145867-807-1515ND
2019-05-155867-801-1020ND
2019-05-155867-802-1010ND
2019-05-155867-803-0940ND
2019-05-155867-804-0855ND
2019-05-155867-808-0830ND
2019-08-135867-801-0920ND
2019-08-135867-802-0840ND
2019-08-135867-803-1005ND
2019-08-135867-804-0825ND
2019-08-135867-805-13253.00 ppb
2019-08-135867-806-1235ND
2019-08-135867-807-1200ND
2019-08-135867-808-11302.00 ppb
2019-11-195867-801-11107.00 ppb
2019-11-195867-802-10458.00 ppb
2019-11-195867-803-10259.00 ppb
2019-11-195867-804-0945ND
2019-11-195867-805-0805ND
2019-11-195867-806-0845ND
2019-11-195867-807-0905ND
2019-11-195867-808-0925ND