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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

California Water Service (CWS) - Salinas

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

132

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND240ND
2015ND240ND
2016ND240ND
2017ND240ND
2018ND240ND
2019ND120ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-235810-801-1150ND
2014-01-235810-802-1330ND
2014-01-235810-803-1249ND
2014-01-235810-804-1033ND
2014-01-235810-805-1402ND
2014-01-235810-806-1307ND
2014-04-235810-801-1427ND
2014-04-235810-802-1042ND
2014-04-235810-803-1023ND
2014-04-235810-804-1314ND
2014-04-235810-805-1132ND
2014-04-235810-806-1007ND
2014-07-225810-801-1442ND
2014-07-225810-802-1146ND
2014-07-225810-803-1102ND
2014-07-225810-804-0940ND
2014-07-225810-806-1337ND
2014-07-305810-805-1402ND
2014-10-205810-801-0929ND
2014-10-205810-802-1440ND
2014-10-205810-803-1428ND
2014-10-205810-804-1407ND
2014-10-205810-805-1503ND
2014-10-205810-806-1249ND
2015-01-215810-801-1232ND
2015-01-215810-802-1416ND
2015-01-215810-803-1335ND
2015-01-215810-804-1047ND
2015-01-215810-805-1456ND
2015-01-215810-806-1357ND
2015-04-215810-801-1300ND
2015-04-215810-802-1513ND
2015-04-215810-803-1446ND
2015-04-215810-804-1148ND
2015-04-215810-805-1535ND
2015-04-215810-806-1458ND
2015-07-215810-801-1643ND
2015-07-215810-802-1425ND
2015-07-215810-804-1603ND
2015-07-215810-805-1440ND
2015-07-215810-806-1333ND
2015-07-235810-803-1524ND
2015-10-215810-801-1150ND
2015-10-215810-802-1348ND
2015-10-215810-803-1312ND
2015-10-215810-804-1132ND
2015-10-215810-805-1428ND
2015-10-215810-806-1326ND
2016-01-205810-801-1359ND
2016-01-205810-802-0957ND
2016-01-205810-803-1044ND
2016-01-205810-804-1106ND
2016-01-205810-805-0938ND
2016-01-205810-806-1028ND
2016-04-195810-801-1525ND
2016-04-195810-802-1151ND
2016-04-195810-803-1127ND
2016-04-195810-804-1007ND
2016-04-195810-805-1417ND
2016-04-195810-806-1300ND
2016-07-195810-801-1407ND
2016-07-195810-802-1112ND
2016-07-195810-803-1014ND
2016-07-195810-804-0908ND
2016-07-195810-805-1131ND
2016-07-195810-806-1232ND
2016-10-135810-801-1048ND
2016-10-135810-802-0939ND
2016-10-135810-803-1009ND
2016-10-135810-804-1030ND
2016-10-135810-805-0920ND
2016-10-135810-806-0953ND
2017-01-195810-801-1343ND
2017-01-195810-802-1310ND
2017-01-195810-803-1259ND
2017-01-195810-804-1402ND
2017-01-195810-805-1326ND
2017-01-195810-806-1245ND
2017-04-195810-801-0901ND
2017-04-195810-802-1222ND
2017-04-195810-803-1251ND
2017-04-195810-804-0916ND
2017-04-195810-805-1147ND
2017-04-195810-806-1236ND
2017-07-185810-801-1112ND
2017-07-185810-802-1008ND
2017-07-185810-803-1032ND
2017-07-185810-804-1142ND
2017-07-185810-805-1339ND
2017-07-185810-806-1018ND
2017-10-165810-801-1339ND
2017-10-165810-802-1142ND
2017-10-165810-803-1158ND
2017-10-165810-804-1705ND
2017-10-165810-805-1746ND
2017-10-165810-806-1104ND
2018-01-185810-801-1436ND
2018-01-185810-802-1347ND
2018-01-185810-803-1334ND
2018-01-185810-804-1418ND
2018-01-185810-805-1401ND
2018-01-185810-806-1323ND
2018-04-175810-801-1340ND
2018-04-175810-802-1146ND
2018-04-175810-803-1112ND
2018-04-175810-804-1032ND
2018-04-175810-805-1311ND
2018-04-175810-806-1256ND
2018-07-185810-801-1432ND
2018-07-185810-802-1522ND
2018-07-185810-803-1511ND
2018-07-185810-804-1059ND
2018-07-185810-805-1011ND
2018-07-185810-806-0928ND
2018-10-235810-801-1012ND
2018-10-235810-802-1122ND
2018-10-235810-803-1137ND
2018-10-235810-804-1250ND
2018-10-235810-805-1105ND
2018-10-235810-806-1046ND
2019-01-165810-801-1324ND
2019-01-165810-802-1420ND
2019-01-165810-803-1406ND
2019-01-165810-804-1526ND
2019-01-165810-805-1108ND
2019-01-165810-806-1124ND
2019-04-155810-801-1315ND
2019-04-155810-805-1401ND
2019-07-165810-801-1350ND
2019-07-165810-805-1305ND
2019-10-215810-801-1258ND
2019-10-215810-805-1000ND