Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

California American Water Company - Monterey

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

 

262

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
20140.388 ppb261ND - 10.1 ppb
2015ND560ND
2016ND440ND
20170.0511 ppb451ND - 2.30 ppb
2018ND450ND
2019ND460ND

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
2014-03-261225-814-131010.1 ppb
2014-06-131225-803-1406ND
2014-06-131225-807-1350ND
2014-06-131225-809-1322ND
2014-06-131225-810-1414ND
2014-06-131225-811-1432ND
2014-06-131225-812-1516ND
2014-06-131225-813-1330ND
2014-06-271225-814-1535ND
2014-09-081225-803-1030ND
2014-09-081225-807-1014ND
2014-09-081225-809-1239ND
2014-09-081225-810-1040ND
2014-09-081225-811-1137ND
2014-09-101225-812-1254ND
2014-09-101225-813-1240ND
2014-09-101225-814-1150ND
2014-12-081225-803-1131ND
2014-12-081225-807-1115ND
2014-12-081225-809-1015ND
2014-12-081225-810-1141ND
2014-12-081225-811-1225ND
2014-12-091225-812-1235ND
2014-12-091225-813-1300ND
2014-12-111225-814-1115ND
2014-12-231225-085-0915ND
2015-01-281225-070-1025ND
2015-02-091225-070-1150ND
2015-02-101225-085-1330ND
2015-03-161225-803-1042ND
2015-03-161225-807-1015ND
2015-03-161225-809-1311ND
2015-03-161225-810-1055ND
2015-03-161225-811-1210ND
2015-03-171225-814-1115ND
2015-03-181225-812-1213ND
2015-03-181225-813-1225ND
2015-03-241225-070-1015ND
2015-04-081225-070-1150ND
2015-04-211225-070-1005ND
2015-05-071225-070-1003ND
2015-05-191225-070-1040ND
2015-06-021225-070-1015ND
2015-06-151225-803-1020ND
2015-06-151225-807-0957ND
2015-06-151225-809-1227ND
2015-06-151225-810-1031ND
2015-06-151225-811-1116ND
2015-06-161225-812-1300ND
2015-06-161225-813-1339ND
2015-06-171225-070-0950ND
2015-06-191225-814-1210ND
2015-06-301225-070-1045ND
2015-07-151225-070-1045ND
2015-07-221225-070-0930ND
2015-07-291225-070-1215ND
2015-08-181225-070-1005ND
2015-09-021225-070-1020ND
2015-09-151225-812-1303ND
2015-09-151225-813-1340ND
2015-09-151225-814-1530ND
2015-09-171225-070-1020ND
2015-09-171225-803-1035ND
2015-09-171225-807-1015ND
2015-09-171225-809-1203ND
2015-09-171225-810-1048ND
2015-09-171225-811-1105ND
2015-09-291225-070-1000ND
2015-10-141225-070-1010ND
2015-10-271225-070-1000ND
2015-11-101225-070-1000ND
2015-11-241225-070-1045ND
2015-12-081225-070-1000ND
2015-12-141225-803-1042ND
2015-12-141225-807-1025ND
2015-12-141225-809-1410ND
2015-12-141225-810-1051ND
2015-12-141225-811-1147ND
2015-12-151225-812-1245ND
2015-12-151225-813-1333ND
2015-12-171225-814-0945ND
2015-12-211225-070-1130ND
2016-01-051225-070-1100ND
2016-01-071225-085-1505ND
2016-02-041225-085-1015ND
2016-03-071225-085-1030ND
2016-03-141225-803-1119ND
2016-03-141225-807-1058ND
2016-03-141225-810-1126ND
2016-03-141225-811-1220ND
2016-03-161225-809-1440ND
2016-03-161225-812-1220ND
2016-03-161225-813-1320ND
2016-03-171225-814-1030ND
2016-04-051225-085-0958ND
2016-06-131225-803-1110ND
2016-06-131225-807-1045ND
2016-06-131225-809-1316ND
2016-06-131225-810-1119ND
2016-06-131225-811-1200ND
2016-06-141225-812-1303ND
2016-06-141225-813-1350ND
2016-06-171225-815-1433ND
2016-08-221225-070-1010ND
2016-09-061225-070-1330ND
2016-09-141225-803-1032ND
2016-09-141225-807-1013ND
2016-09-141225-809-1410ND
2016-09-141225-810-1043ND
2016-09-141225-811-1102ND
2016-09-141225-812-1145ND
2016-09-141225-813-1315ND
2016-09-161225-815-1545ND
2016-09-221225-809-1302ND
2016-10-041225-070-1315ND
2016-11-161225-070-1015ND
2016-12-021225-070-1730ND
2016-12-131225-812-1310ND
2016-12-131225-813-1413ND
2016-12-141225-803-1110ND
2016-12-141225-807-1050ND
2016-12-141225-809-1300ND
2016-12-141225-810-1118ND
2016-12-141225-811-1200ND
2016-12-161225-815-1320ND
2016-12-201225-085-1135ND
2017-01-061225-085-1500ND
2017-02-281225-085-1250ND
2017-03-141225-085-1300ND
2017-03-141225-803-1107ND
2017-03-141225-807-1048ND
2017-03-141225-809-1320ND
2017-03-141225-810-1113ND
2017-03-141225-811-1202ND
2017-03-151225-812-1310ND
2017-03-151225-813-1420ND
2017-03-151225-815-1350ND
2017-03-281225-085-1321ND
2017-04-111225-085-1245ND
2017-06-091225-070-1105ND
2017-06-121225-803-1056ND
2017-06-121225-807-1038ND
2017-06-121225-809-1326ND
2017-06-121225-810-1104ND
2017-06-121225-811-1154ND
2017-06-131225-812-1235ND
2017-06-131225-813-1414ND
2017-06-131225-815-1331ND
2017-06-201225-070-1055ND
2017-06-281225-070-1159ND
2017-07-111225-070-1025ND
2017-07-181225-070-1020ND
2017-07-251225-070-1200ND
2017-08-011225-070-1230ND
2017-08-241225-070-1020ND
2017-09-111225-803-1112ND
2017-09-111225-807-1058ND
2017-09-111225-809-1352ND
2017-09-111225-810-1122ND
2017-09-111225-811-1215ND
2017-09-121225-812-1240ND
2017-09-121225-813-1348ND
2017-09-121225-815-13102.30 ppb
2017-12-111225-803-1114ND
2017-12-111225-807-1100ND
2017-12-111225-809-1321ND
2017-12-111225-810-1125ND
2017-12-111225-811-1213ND
2017-12-121225-812-1255ND
2017-12-121225-813-1356ND
2017-12-121225-815-1320ND
2018-03-121225-803-1105ND
2018-03-121225-807-1048ND
2018-03-121225-809-1322ND
2018-03-121225-810-1112ND
2018-03-121225-811-1203ND
2018-03-131225-812-1223ND
2018-03-131225-813-1350ND
2018-03-131225-815-1332ND
2018-05-011225-070-0930ND
2018-05-101225-070-1130ND
2018-05-181225-070-1045ND
2018-05-301225-070-1005ND
2018-06-111225-803-1123ND
2018-06-111225-807-1102ND
2018-06-111225-809-1341ND
2018-06-111225-810-1129ND
2018-06-111225-811-1226ND
2018-06-121225-812-1235ND
2018-06-121225-813-1328ND
2018-06-121225-815-1354ND
2018-06-131225-070-0930ND
2018-06-261225-070-1015ND
2018-06-301225-070-1055ND
2018-07-091225-070-1005ND
2018-08-141225-070-1440ND
2018-09-101225-803-1106ND
2018-09-101225-807-1050ND
2018-09-101225-809-1328ND
2018-09-101225-810-1113ND
2018-09-101225-811-1208ND
2018-09-111225-812-1316ND
2018-09-111225-813-1436ND
2018-09-111225-815-1416ND
2018-09-191225-070-1100ND
2018-10-091225-070-1200ND
2018-11-051225-070-1325ND
2018-12-031225-070-1145ND
2018-12-101225-803-1138ND
2018-12-101225-807-1120ND
2018-12-101225-809-1421ND
2018-12-101225-810-1147ND
2018-12-101225-811-1208ND
2018-12-101225-812-1243ND
2018-12-101225-813-1343ND
2018-12-101225-815-1312ND
2019-01-151225-085-1545ND
2019-02-121225-085-1245ND
2019-03-111225-803-1342ND
2019-03-111225-807-1322ND
2019-03-111225-809-1440ND
2019-03-111225-810-1350ND
2019-03-111225-811-1408ND
2019-03-111225-812-1515ND
2019-03-111225-813-1645ND
2019-03-111225-815-1622ND
2019-03-191225-085-1640ND
2019-04-101225-085-1340ND
2019-06-071225-070-1350ND
2019-06-111225-803-1340ND
2019-06-111225-807-1317ND
2019-06-111225-809-1705ND
2019-06-111225-810-1350ND
2019-06-111225-811-1420ND
2019-06-111225-812-1520ND
2019-06-111225-813-1634ND
2019-06-111225-815-1615ND
2019-06-211225-070-1452ND
2019-07-021225-070-1250ND
2019-07-161225-070-1425ND
2019-08-011225-070-1305ND
2019-08-081225-070-1545ND
2019-09-061225-070-1325ND
2019-09-101225-803-1349ND
2019-09-101225-807-1335ND
2019-09-101225-809-1725ND
2019-09-101225-810-1358ND
2019-09-101225-811-1440ND
2019-09-101225-812-1510ND
2019-09-101225-813-1558ND
2019-09-101225-815-1537ND
2019-10-221225-070-1330ND
2019-11-051225-070-1340ND
2019-12-021225-070-1245ND
2019-12-091225-803-1536ND
2019-12-091225-807-1510ND
2019-12-091225-809-1652ND
2019-12-091225-810-1545ND
2019-12-091225-811-1627ND
2019-12-101225-812-1648ND
2019-12-101225-813-1742ND
2019-12-101225-815-1722ND