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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

San Jose Water Company

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

 

330

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
2014ND610ND
20150.0677 ppb311ND - 2.10 ppb
2016ND480ND
2017ND620ND
2018ND640ND
20190.105 ppb641ND - 6.70 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
2014-02-281610-900-0957ND
2014-02-281610-901-1241ND
2014-02-281610-902-0900ND
2014-02-281610-903-0926ND
2014-02-281610-904-0910ND
2014-02-281610-905-1212ND
2014-02-281610-906-1021ND
2014-02-281610-907-1225ND
2014-02-281610-908-0941ND
2014-02-281610-909-1009ND
2014-02-281610-910-1032ND
2014-02-281610-911-1054ND
2014-02-281610-912-1414ND
2014-02-281610-913-1351ND
2014-02-281610-914-1320ND
2014-02-281610-915-1110ND
2014-05-071610-900-0925ND
2014-05-071610-901-1007ND
2014-05-071610-902-0753ND
2014-05-071610-903-0913ND
2014-05-071610-904-0807ND
2014-05-071610-905-0933ND
2014-05-071610-906-1035ND
2014-05-071610-907-0943ND
2014-05-071610-908-0900ND
2014-05-071610-909-1025ND
2014-05-071610-910-1055ND
2014-05-071610-911-1116ND
2014-05-071610-912-1323ND
2014-05-071610-913-1430ND
2014-05-071610-914-1420ND
2014-05-071610-915-1235ND
2014-08-251610-901-1138ND
2014-08-251610-902-0933ND
2014-08-251610-904-0947ND
2014-08-251610-905-1108ND
2014-08-251610-907-1123ND
2014-08-251610-908-1025ND
2014-08-251610-909-1155ND
2014-08-251610-910-1217ND
2014-08-251610-911-1333ND
2014-08-251610-912-1417ND
2014-08-251610-913-1449ND
2014-08-251610-914-1438ND
2014-08-251610-915-1350ND
2014-11-071610-900-1015ND
2014-11-071610-901-1055ND
2014-11-071610-902-0909ND
2014-11-071610-903-1004ND
2014-11-071610-904-0920ND
2014-11-071610-905-1024ND
2014-11-071610-906-1222ND
2014-11-071610-907-1040ND
2014-11-071610-908-0948ND
2014-11-071610-909-1103ND
2014-11-071610-910-1243ND
2014-11-071610-911-1303ND
2014-11-071610-912-1353ND
2014-11-071610-913-1427ND
2014-11-071610-914-1411ND
2014-11-071610-915-1334ND
2015-02-061610-900-1014ND
2015-02-061610-901-0958ND
2015-02-061610-902-1306ND
2015-02-061610-903-1228ND
2015-02-061610-904-1259ND
2015-02-061610-905-0923ND
2015-02-061610-906-0858ND
2015-02-061610-907-0948ND
2015-02-061610-908-1024ND
2015-02-061610-909-0913ND
2015-02-061610-910-1041ND
2015-02-061610-911-1154ND
2015-02-061610-912-1339ND
2015-02-061610-913-1418ND
2015-02-061610-914-1400ND
2015-02-061610-915-1051ND
2015-05-291610-900-1115ND
2015-05-291610-901-1339ND
2015-05-291610-902-1000ND
2015-05-291610-903-1105ND
2015-05-291610-904-1016ND
2015-05-291610-905-13102.10 ppb
2015-05-291610-906-1240ND
2015-05-291610-907-1322ND
2015-05-291610-908-1050ND
2015-05-291610-909-1250ND
2015-05-291610-910-1227ND
2015-05-291610-911-1403ND
2015-05-291610-912-1435ND
2015-05-291610-914-1453ND
2015-05-291610-915-1216ND
2016-05-061610-900-0907ND
2016-05-061610-901-1027ND
2016-05-061610-902-0800ND
2016-05-061610-903-0852ND
2016-05-061610-904-0812ND
2016-05-061610-905-0945ND
2016-05-061610-906-1045ND
2016-05-061610-907-1000ND
2016-05-061610-908-0835ND
2016-05-061610-909-0925ND
2016-05-061610-910-1110ND
2016-05-061610-911-1145ND
2016-05-061610-912-1320ND
2016-05-061610-913-1415ND
2016-05-061610-914-1350ND
2016-05-061610-915-1255ND
2016-08-191610-900-1151ND
2016-08-191610-902-1026ND
2016-08-191610-903-1142ND
2016-08-191610-904-1110ND
2016-08-191610-905-1313ND
2016-08-191610-906-1350ND
2016-08-191610-908-1130ND
2016-08-191610-909-1343ND
2016-08-191610-910-1410ND
2016-08-191610-911-0829ND
2016-08-191610-912-0915ND
2016-08-191610-913-0946ND
2016-08-191610-914-0938ND
2016-08-191610-915-0855ND
2016-08-265867-907-0920ND
2016-09-085867-901-1030ND
2016-11-011610-900-1041ND
2016-11-011610-901-1145ND
2016-11-011610-902-0943ND
2016-11-011610-903-1032ND
2016-11-011610-904-0954ND
2016-11-011610-905-1117ND
2016-11-011610-906-1050ND
2016-11-011610-907-1130ND
2016-11-011610-908-1013ND
2016-11-011610-909-1103ND
2016-11-011610-910-1231ND
2016-11-011610-911-1207ND
2016-11-011610-912-1432ND
2016-11-011610-913-1357ND
2016-11-011610-914-1412ND
2016-11-011610-915-1245ND
2017-02-101610-900-0836ND
2017-02-101610-901-0915ND
2017-02-101610-902-0743ND
2017-02-101610-903-0826ND
2017-02-101610-904-0750ND
2017-02-101610-905-0850ND
2017-02-101610-906-0943ND
2017-02-101610-907-0902ND
2017-02-101610-908-0811ND
2017-02-101610-909-0933ND
2017-02-101610-910-1000ND
2017-02-101610-911-1046ND
2017-02-101610-912-1230ND
2017-02-101610-913-1300ND
2017-02-101610-914-1300ND
2017-02-101610-915-1011ND
2017-05-151610-900-1016ND
2017-05-151610-901-1345ND
2017-05-151610-902-0903ND
2017-05-151610-903-1007ND
2017-05-151610-904-0915ND
2017-05-151610-905-1317ND
2017-05-151610-906-1032ND
2017-05-151610-907-1329ND
2017-05-151610-908-0938ND
2017-05-151610-909-1023ND
2017-05-151610-910-1115ND
2017-05-151610-911-1252ND
2017-05-151610-912-1414ND
2017-05-151610-913-1445ND
2017-05-151610-914-1435ND
2017-05-151610-915-1028ND
2017-08-141610-900-1011ND
2017-08-141610-902-0919ND
2017-08-141610-903-1000ND
2017-08-141610-904-0930ND
2017-08-141610-905-1050ND
2017-08-141610-906-1023ND
2017-08-141610-907-1111ND
2017-08-141610-908-0948ND
2017-08-141610-909-1300ND
2017-08-141610-911-1235ND
2017-08-141610-912-1318ND
2017-08-141610-913-1407ND
2017-08-141610-914-1343ND
2017-08-141610-915-1255ND
2017-11-011610-900-1009ND
2017-11-011610-901-1125ND
2017-11-011610-902-0915ND
2017-11-011610-903-1002ND
2017-11-011610-904-0900ND
2017-11-011610-905-1043ND
2017-11-011610-906-1032ND
2017-11-011610-907-1051ND
2017-11-011610-908-0950ND
2017-11-011610-909-1023ND
2017-11-011610-910-1201ND
2017-11-011610-911-1255ND
2017-11-011610-912-1337ND
2017-11-011610-913-1410ND
2017-11-011610-914-1400ND
2017-11-011610-915-1317ND
2018-02-121610-900-1058ND
2018-02-121610-901-1243ND
2018-02-121610-902-0931ND
2018-02-121610-903-1050ND
2018-02-121610-904-0940ND
2018-02-121610-905-1213ND
2018-02-121610-906-1119ND
2018-02-121610-907-1227ND
2018-02-121610-908-1011ND
2018-02-121610-909-1146ND
2018-02-121610-910-1302ND
2018-02-121610-911-1337ND
2018-02-121610-912-1416ND
2018-02-121610-913-1449ND
2018-02-121610-914-1441ND
2018-02-121610-915-1315ND
2018-05-071610-900-1022ND
2018-05-071610-901-1150ND
2018-05-071610-902-0918ND
2018-05-071610-903-1014ND
2018-05-071610-904-0929ND
2018-05-071610-905-1121ND
2018-05-071610-906-1045ND
2018-05-071610-907-1130ND
2018-05-071610-908-0955ND
2018-05-071610-909-1036ND
2018-05-071610-910-1207ND
2018-05-071610-911-1314ND
2018-05-071610-913-1348ND
2018-05-071610-914-1405ND
2018-05-071610-915-1217ND
2018-05-081610-912-1254ND
2018-08-021610-900-1004ND
2018-08-021610-901-1105ND
2018-08-021610-902-0910ND
2018-08-021610-903-0954ND
2018-08-021610-904-0920ND
2018-08-021610-905-1046ND
2018-08-021610-906-1038ND
2018-08-021610-907-1055ND
2018-08-021610-908-0941ND
2018-08-021610-909-1021ND
2018-08-021610-910-1139ND
2018-08-021610-911-1300ND
2018-08-021610-912-1331ND
2018-08-021610-913-1410ND
2018-08-021610-914-1400ND
2018-08-021610-915-1236ND
2018-11-051610-900-1055ND
2018-11-051610-901-1230ND
2018-11-051610-902-0935ND
2018-11-051610-903-1045ND
2018-11-051610-904-0947ND
2018-11-051610-905-1156ND
2018-11-051610-906-1119ND
2018-11-051610-907-1204ND
2018-11-051610-908-1011ND
2018-11-051610-909-1109ND
2018-11-051610-910-1358ND
2018-11-051610-911-1418ND
2018-11-051610-915-1342ND
2018-11-061610-912-1138ND
2018-11-061610-913-1430ND
2018-11-061610-914-1415ND
2019-02-111610-900-1107ND
2019-02-111610-901-1219ND
2019-02-111610-902-0842ND
2019-02-111610-903-1055ND
2019-02-111610-904-0902ND
2019-02-111610-905-1139ND
2019-02-111610-906-1339ND
2019-02-111610-907-1200ND
2019-02-111610-908-1007ND
2019-02-111610-909-1237ND
2019-02-111610-910-1401ND
2019-02-111610-915-1424ND
2019-02-121610-911-0955ND
2019-02-121610-912-1119ND
2019-02-121610-913-1335ND
2019-02-121610-914-1320ND
2019-05-081610-900-1030ND
2019-05-081610-901-11456.70 ppb
2019-05-081610-902-0915ND
2019-05-081610-903-1020ND
2019-05-081610-904-0931ND
2019-05-081610-905-1120ND
2019-05-081610-906-1100ND
2019-05-081610-907-1135ND
2019-05-081610-908-0951ND
2019-05-081610-909-1045ND
2019-05-081610-910-1235ND
2019-05-081610-911-1215ND
2019-05-081610-912-1310ND
2019-05-081610-913-1415ND
2019-05-081610-914-1345ND
2019-05-081610-915-1247ND
2019-08-141610-900-0709ND
2019-08-141610-901-0812ND
2019-08-141610-902-0600ND
2019-08-141610-903-0700ND
2019-08-141610-904-1046ND
2019-08-141610-905-0752ND
2019-08-141610-906-0743ND
2019-08-141610-907-0800ND
2019-08-141610-908-0639ND
2019-08-141610-909-0724ND
2019-08-141610-910-0836ND
2019-08-141610-911-0907ND
2019-08-141610-912-1028ND
2019-08-141610-913-1123ND
2019-08-141610-914-1100ND
2019-08-141610-915-0848ND
2019-11-201610-900-1130ND
2019-11-201610-901-1028ND
2019-11-201610-902-1011ND
2019-11-201610-903-1120ND
2019-11-201610-904-0922ND
2019-11-201610-905-0953ND
2019-11-201610-906-1059ND
2019-11-201610-907-1008ND
2019-11-201610-908-0929ND
2019-11-201610-909-1047ND
2019-11-201610-910-1121ND
2019-11-201610-911-1150ND
2019-11-201610-912-1408ND
2019-11-201610-913-1420ND
2019-11-201610-914-1400ND
2019-11-201610-915-1311ND