Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Haloacetic acids (HAA5)

City of Fresno

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

 

280

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
20140.900 ppb4613ND - 4.50 ppb
20150.941 ppb4414ND - 4.10 ppb
20161.73 ppb4616ND - 7.80 ppb
20170.729 ppb488ND - 8.80 ppb
20181.56 ppb4821ND - 4.90 ppb
20193.48 ppb4836ND - 12.0 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
2014-01-155810-900-0805ND
2014-01-155810-901-0830ND
2014-01-155810-902-0850ND
2014-01-155810-903-09253.30 ppb
2014-01-155810-904-1015ND
2014-01-155810-905-0945ND
2014-01-155810-906-1400ND
2014-01-155810-907-1215ND
2014-01-155810-908-1055ND
2014-01-155810-909-1035ND
2014-01-155810-910-1120ND
2014-01-155810-911-1150ND
2014-04-165810-900-08503.00 ppb
2014-04-165810-901-09152.50 ppb
2014-04-165810-902-09402.90 ppb
2014-04-165810-903-1005ND
2014-04-165810-904-1045ND
2014-04-165810-906-1115ND
2014-04-165810-907-1405ND
2014-04-165810-908-12052.80 ppb
2014-04-165810-909-1145ND
2014-04-165810-910-1225ND
2014-04-165810-911-1340ND
2014-07-165810-900-0900ND
2014-07-165810-901-0920ND
2014-07-165810-902-0940ND
2014-07-165810-903-10053.50 ppb
2014-07-165810-904-1135ND
2014-07-165810-905-10252.70 ppb
2014-07-165810-906-1105ND
2014-07-165810-907-1340ND
2014-07-165810-908-12204.00 ppb
2014-07-165810-909-1200ND
2014-07-165810-910-1245ND
2014-07-165810-911-1310ND
2014-10-155810-900-08353.80 ppb
2014-10-155810-901-09003.00 ppb
2014-10-155810-902-09202.00 ppb
2014-10-155810-903-09404.50 ppb
2014-10-155810-904-1040ND
2014-10-155810-905-1000ND
2014-10-155810-906-1115ND
2014-10-155810-907-1355ND
2014-10-155810-908-12153.40 ppb
2014-10-155810-909-1155ND
2014-10-155810-911-1330ND
2015-01-215810-900-08402.10 ppb
2015-01-215810-901-0905ND
2015-01-215810-902-0925ND
2015-01-215810-903-0950ND
2015-01-215810-904-1130ND
2015-01-215810-905-1015ND
2015-01-215810-906-1055ND
2015-01-215810-907-1400ND
2015-01-215810-908-12152.30 ppb
2015-01-215810-909-1145ND
2015-01-215810-911-1325ND
2015-04-155810-900-0800ND
2015-04-155810-901-0830ND
2015-04-155810-902-0855ND
2015-04-155810-903-09154.00 ppb
2015-04-155810-904-1040ND
2015-04-155810-905-09353.60 ppb
2015-04-155810-906-1010ND
2015-04-155810-907-1310ND
2015-04-155810-908-1115ND
2015-04-155810-909-1055ND
2015-04-155810-911-1240ND
2015-07-155810-900-0815ND
2015-07-155810-901-08402.20 ppb
2015-07-155810-902-0900ND
2015-07-155810-903-09153.70 ppb
2015-07-155810-904-1015ND
2015-07-155810-905-09453.10 ppb
2015-07-155810-906-1040ND
2015-07-155810-907-1400ND
2015-07-155810-908-11404.10 ppb
2015-07-155810-909-1120ND
2015-07-155810-911-1335ND
2015-10-215810-900-10002.80 ppb
2015-10-215810-901-10202.50 ppb
2015-10-215810-902-10402.10 ppb
2015-10-215810-903-10552.70 ppb
2015-10-215810-904-1230ND
2015-10-215810-905-11202.60 ppb
2015-10-215810-906-1200ND
2015-10-215810-907-1415ND
2015-10-215810-908-13103.60 ppb
2015-10-215810-909-1245ND
2015-10-215810-911-1345ND
2016-01-205810-900-08404.00 ppb
2016-01-205810-901-09152.00 ppb
2016-01-205810-902-09304.80 ppb
2016-01-205810-903-10054.80 ppb
2016-01-205810-904-1100ND
2016-01-205810-905-10254.70 ppb
2016-01-205810-906-11303.50 ppb
2016-01-205810-907-1410ND
2016-01-205810-908-1220ND
2016-01-205810-909-1200ND
2016-01-205810-911-1340ND
2016-04-215810-900-08107.80 ppb
2016-04-215810-901-08306.40 ppb
2016-04-215810-902-08507.10 ppb
2016-04-215810-903-09157.60 ppb
2016-04-215810-904-1000ND
2016-04-215810-905-09357.20 ppb
2016-04-215810-906-1035ND
2016-04-215810-907-1355ND
2016-04-215810-908-1145ND
2016-04-215810-909-1120ND
2016-04-215810-911-1330ND
2016-07-205810-900-08153.40 ppb
2016-07-205810-901-0835ND
2016-07-205810-902-0905ND
2016-07-205810-903-09254.40 ppb
2016-07-205810-904-1025ND
2016-07-205810-905-09553.90 ppb
2016-07-205810-906-1115ND
2016-07-205810-907-1430ND
2016-07-205810-908-12205.90 ppb
2016-07-205810-909-1200ND
2016-07-205810-910-13452.20 ppb
2016-07-205810-911-1410ND
2016-10-195810-900-0945ND
2016-10-195810-901-1005ND
2016-10-195810-902-1030ND
2016-10-195810-903-1055ND
2016-10-195810-904-1130ND
2016-10-195810-905-1210ND
2016-10-195810-906-1245ND
2016-10-195810-907-1325ND
2016-10-195810-908-1400ND
2016-10-195810-909-1430ND
2016-10-195810-910-1510ND
2016-10-195810-911-1540ND
2017-01-175810-900-0910ND
2017-01-175810-901-0928ND
2017-01-175810-902-0945ND
2017-01-175810-903-1005ND
2017-01-175810-904-1055ND
2017-01-175810-905-1025ND
2017-01-175810-906-1125ND
2017-01-175810-907-1415ND
2017-01-175810-908-1225ND
2017-01-175810-909-1205ND
2017-01-175810-910-1255ND
2017-01-175810-911-1350ND
2017-04-195810-900-08402.70 ppb
2017-04-195810-901-09102.80 ppb
2017-04-195810-902-09405.70 ppb
2017-04-195810-903-10454.80 ppb
2017-04-195810-904-1135ND
2017-04-195810-905-12102.60 ppb
2017-04-195810-906-1245ND
2017-04-195810-907-1325ND
2017-04-195810-908-1400ND
2017-04-195810-909-1425ND
2017-04-195810-910-14508.80 ppb
2017-04-195810-911-1515ND
2017-07-205810-900-09352.40 ppb
2017-07-205810-901-1000ND
2017-07-205810-902-1040ND
2017-07-205810-903-1100ND
2017-07-205810-904-1125ND
2017-07-205810-905-1150ND
2017-07-205810-906-1230ND
2017-07-205810-907-1305ND
2017-07-205810-908-1330ND
2017-07-205810-909-1405ND
2017-07-205810-910-1440ND
2017-07-205810-911-1510ND
2017-10-255810-900-0805ND
2017-10-255810-901-0830ND
2017-10-255810-902-0915ND
2017-10-255810-903-0930ND
2017-10-255810-904-1145ND
2017-10-255810-905-1115ND
2017-10-255810-906-1030ND
2017-10-255810-907-1430ND
2017-10-255810-908-1240ND
2017-10-255810-909-1215ND
2017-10-255810-910-13105.20 ppb
2017-10-255810-911-1345ND
2018-01-175810-900-08302.20 ppb
2018-01-175810-901-0900ND
2018-01-175810-902-09253.80 ppb
2018-01-175810-903-09503.60 ppb
2018-01-175810-904-1120ND
2018-01-175810-905-1050ND
2018-01-175810-906-1020ND
2018-01-175810-907-1410ND
2018-01-175810-908-12353.10 ppb
2018-01-175810-909-1145ND
2018-01-175810-910-1315ND
2018-01-175810-911-1340ND
2018-04-205810-900-09004.80 ppb
2018-04-205810-901-09253.20 ppb
2018-04-205810-902-09503.10 ppb
2018-04-205810-903-10154.50 ppb
2018-04-205810-904-1155ND
2018-04-205810-905-1130ND
2018-04-205810-906-1045ND
2018-04-205810-907-1300ND
2018-04-205810-908-1335ND
2018-04-205810-909-1225ND
2018-04-205810-910-1400ND
2018-04-205810-911-1435ND
2018-07-185810-900-08454.70 ppb
2018-07-185810-901-09102.00 ppb
2018-07-185810-902-0930ND
2018-07-185810-903-0945ND
2018-07-185810-904-10103.70 ppb
2018-07-185810-905-1100ND
2018-07-185810-906-1145ND
2018-07-185810-907-1215ND
2018-07-185810-908-1315ND
2018-07-185810-909-13302.30 ppb
2018-07-185810-910-13453.70 ppb
2018-07-185810-911-1410ND
2018-12-065810-900-10052.80 ppb
2018-12-065810-901-10332.30 ppb
2018-12-065810-902-11134.80 ppb
2018-12-065810-903-11444.10 ppb
2018-12-065810-904-15473.60 ppb
2018-12-065810-905-12204.90 ppb
2018-12-065810-906-0925ND
2018-12-065810-907-1445ND
2018-12-065810-908-1255ND
2018-12-065810-909-15233.60 ppb
2018-12-065810-910-13243.90 ppb
2018-12-065810-911-1358ND
2019-01-165810-900-08452.20 ppb
2019-01-165810-901-0918ND
2019-01-165810-902-09474.00 ppb
2019-01-165810-903-10202.40 ppb
2019-01-165810-904-11023.60 ppb
2019-01-165810-905-11423.80 ppb
2019-01-165810-906-1230ND
2019-01-165810-907-1515ND
2019-01-165810-908-1325ND
2019-01-165810-909-14504.30 ppb
2019-01-165810-910-13522.20 ppb
2019-01-165810-911-14203.30 ppb
2019-04-185810-900-08434.70 ppb
2019-04-185810-901-09204.30 ppb
2019-04-185810-902-09415.30 ppb
2019-04-185810-903-10045.20 ppb
2019-04-185810-904-11015.30 ppb
2019-04-185810-905-10333.60 ppb
2019-04-185810-906-0800ND
2019-04-185810-907-1348ND
2019-04-185810-908-113812.0 ppb
2019-04-185810-909-11174.90 ppb
2019-04-185810-910-13005.60 ppb
2019-04-185810-911-13265.10 ppb
2019-07-265810-900-09503.80 ppb
2019-07-265810-901-11153.60 ppb
2019-07-265810-902-11353.60 ppb
2019-07-265810-903-11544.50 ppb
2019-07-265810-904-13305.60 ppb
2019-07-265810-905-1217ND
2019-07-265810-906-0900ND
2019-07-265810-907-15106.50 ppb
2019-07-265810-908-14109.30 ppb
2019-07-265810-909-13485.20 ppb
2019-07-265810-910-14277.30 ppb
2019-07-265810-911-14475.30 ppb
2019-10-165810-900-09522.10 ppb
2019-10-165810-901-1018ND
2019-10-165810-902-1042ND
2019-10-165810-903-11102.50 ppb
2019-10-165810-904-11355.70 ppb
2019-10-165810-905-12052.70 ppb
2019-10-165810-906-0903ND
2019-10-165810-907-12404.10 ppb
2019-10-165810-908-13084.30 ppb
2019-10-165810-909-13274.70 ppb
2019-10-165810-910-13534.40 ppb
2019-10-165810-911-1421ND