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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of La Habra

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

 

184

Samples

0

Samples exceeding legal limit (MCL)

108

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.05 ppb2416ND - 5.40 ppb
20151.67 ppb3215ND - 15.7 ppb
20161.08 ppb3212ND - 5.70 ppb
20171.31 ppb3215ND - 8.20 ppb
20182.40 ppb3227ND - 5.70 ppb
20193.11 ppb3223ND - 14.6 ppb

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
2014-02-133761-801-14144.30 ppb
2014-02-133761-802-13282.50 ppb
2014-02-133761-803-13413.70 ppb
2014-02-133761-804-14254.20 ppb
2014-02-133761-805-14035.40 ppb
2014-02-133761-806-1441ND
2014-02-133761-807-12372.50 ppb
2014-02-133761-808-15205.20 ppb
2014-05-153761-801-1021ND
2014-05-153761-802-0954ND
2014-05-153761-803-1000ND
2014-05-153761-804-1029ND
2014-05-153761-805-1008ND
2014-05-153761-806-0945ND
2014-05-153761-807-09361.60 ppb
2014-05-153761-808-09263.30 ppb
2014-08-143761-801-10251.80 ppb
2014-08-143761-802-10592.90 ppb
2014-08-143761-803-10452.80 ppb
2014-08-143761-804-1034ND
2014-08-143761-805-10521.60 ppb
2014-08-143761-806-10052.60 ppb
2014-08-143761-807-10133.20 ppb
2014-08-143761-808-09551.60 ppb
2015-02-133761-801-1242ND
2015-02-133761-802-12202.20 ppb
2015-02-133761-803-12272.40 ppb
2015-02-133761-804-1250ND
2015-02-133761-805-12332.40 ppb
2015-02-133761-806-1303ND
2015-02-133761-807-1315ND
2015-02-133761-808-13302.00 ppb
2015-05-143761-801-1230ND
2015-05-143761-802-103015.7 ppb
2015-05-143761-803-1115ND
2015-05-143761-804-1215ND
2015-05-143761-805-11304.60 ppb
2015-05-143761-806-1145ND
2015-05-143761-807-10451.90 ppb
2015-05-143761-808-10306.40 ppb
2015-08-143761-801-1150ND
2015-08-143761-802-12251.20 ppb
2015-08-143761-803-1240ND
2015-08-143761-804-1205ND
2015-08-143761-805-1305ND
2015-08-143761-806-1320ND
2015-08-143761-807-1135ND
2015-08-143761-808-11203.10 ppb
2015-11-093761-801-1354ND
2015-11-093761-802-13182.50 ppb
2015-11-093761-803-13292.60 ppb
2015-11-093761-804-1403ND
2015-11-093761-805-1344ND
2015-11-093761-806-14181.10 ppb
2015-11-093761-807-12504.00 ppb
2015-11-093761-808-13221.40 ppb
2016-02-083761-801-1236ND
2016-02-083761-802-13172.60 ppb
2016-02-083761-803-13122.60 ppb
2016-02-083761-804-1243ND
2016-02-083761-805-1256ND
2016-02-083761-806-13302.60 ppb
2016-02-083761-807-13393.20 ppb
2016-02-083761-808-11214.30 ppb
2016-05-093761-801-1425ND
2016-05-093761-802-1400ND
2016-05-093761-803-1415ND
2016-05-093761-804-1455ND
2016-05-093761-805-1430ND
2016-05-093761-806-15053.70 ppb
2016-05-093761-807-13003.60 ppb
2016-05-093761-808-11405.70 ppb
2016-08-083761-801-1353ND
2016-08-083761-802-13111.40 ppb
2016-08-083761-803-13201.50 ppb
2016-08-083761-804-1410ND
2016-08-083761-805-1329ND
2016-08-083761-806-14191.20 ppb
2016-08-083761-807-11222.10 ppb
2016-08-083761-808-1220ND
2016-11-093761-801-1030ND
2016-11-093761-802-1102ND
2016-11-093761-803-1054ND
2016-11-093761-804-1035ND
2016-11-093761-805-1042ND
2016-11-093761-806-1115ND
2016-11-093761-807-1020ND
2016-11-093761-808-1134ND
2017-02-133761-801-1326ND
2017-02-133761-802-1148ND
2017-02-133761-803-1302ND
2017-02-133761-804-1336ND
2017-02-133761-805-1315ND
2017-02-133761-806-1357ND
2017-02-133761-807-12131.000 ppb
2017-02-133761-808-11058.20 ppb
2017-05-093761-801-1038ND
2017-05-093761-802-11121.30 ppb
2017-05-093761-803-11031.30 ppb
2017-05-093761-804-1047ND
2017-05-093761-805-10541.10 ppb
2017-05-093761-806-10221.10 ppb
2017-05-093761-807-10295.00 ppb
2017-05-093761-808-10103.00 ppb
2017-08-073761-801-1400ND
2017-08-073761-802-13102.90 ppb
2017-08-073761-803-13164.20 ppb
2017-08-073761-804-1413ND
2017-08-073761-805-13302.90 ppb
2017-08-073761-806-14282.40 ppb
2017-08-073761-807-11023.30 ppb
2017-08-073761-808-11512.80 ppb
2017-11-133761-801-1304ND
2017-11-133761-802-1221ND
2017-11-133761-803-1228ND
2017-11-133761-804-1320ND
2017-11-133761-805-1248ND
2017-11-133761-806-1343ND
2017-11-133761-807-1043ND
2017-11-133761-808-11271.50 ppb
2018-02-123761-801-13063.30 ppb
2018-02-123761-802-1222ND
2018-02-123761-803-1234ND
2018-02-123761-804-13154.00 ppb
2018-02-123761-805-12493.20 ppb
2018-02-123761-806-13362.70 ppb
2018-02-123761-807-1148ND
2018-02-123761-808-13511.90 ppb
2018-05-073761-801-12264.20 ppb
2018-05-073761-802-12424.10 ppb
2018-05-073761-803-12564.80 ppb
2018-05-073761-804-13374.40 ppb
2018-05-073761-805-13114.20 ppb
2018-05-073761-806-14062.00 ppb
2018-05-073761-807-12122.50 ppb
2018-05-073761-808-11012.90 ppb
2018-08-163761-801-09445.40 ppb
2018-08-163761-802-10182.90 ppb
2018-08-163761-803-10102.90 ppb
2018-08-163761-804-09555.70 ppb
2018-08-163761-805-10032.00 ppb
2018-08-163761-806-09341.90 ppb
2018-08-163761-807-09262.70 ppb
2018-08-163761-808-09132.00 ppb
2018-11-053761-801-1305ND
2018-11-053761-802-14091.000 ppb
2018-11-053761-803-13531.000 ppb
2018-11-053761-804-1320ND
2018-11-053761-805-13291.000 ppb
2018-11-053761-806-12161.000 ppb
2018-11-053761-807-12292.20 ppb
2018-11-053761-808-10501.000 ppb
2019-02-043761-801-1403ND
2019-02-043761-802-1252ND
2019-02-043761-803-1308ND
2019-02-043761-804-1151ND
2019-02-043761-805-1336ND
2019-02-043761-806-11521.50 ppb
2019-02-043761-807-1430ND
2019-02-043761-808-1033ND
2019-05-083761-801-11003.90 ppb
2019-05-083761-802-10221.000 ppb
2019-05-083761-803-10311.60 ppb
2019-05-083761-804-10484.10 ppb
2019-05-083761-805-10401.90 ppb
2019-05-083761-806-1003ND
2019-05-083761-807-10121.20 ppb
2019-05-083761-808-09511.000 ppb
2019-08-053761-801-13544.40 ppb
2019-08-053761-802-12401.50 ppb
2019-08-053761-803-12562.00 ppb
2019-08-053761-804-13434.40 ppb
2019-08-053761-805-13043.20 ppb
2019-08-053761-806-11331.20 ppb
2019-08-053761-807-14211.70 ppb
2019-08-053761-808-1433ND
2019-11-043761-801-130714.2 ppb
2019-11-043761-802-14125.70 ppb
2019-11-043761-803-14008.70 ppb
2019-11-043761-804-132214.6 ppb
2019-11-043761-805-134010.5 ppb
2019-11-043761-806-12135.00 ppb
2019-11-043761-807-12274.70 ppb
2019-11-043761-808-10401.50 ppb