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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Bakersfield

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.70 ppb329ND - 20.0 ppb
20151.06 ppb324ND - 16.0 ppb
201611.1 ppb3213ND - 54.0 ppb
201713.7 ppb3216ND - 59.0 ppb
201811.2 ppb3215ND - 54.0 ppb
201913.3 ppb3216ND - 54.0 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
2014-01-215810-900-1300ND
2014-01-215810-901-10455.40 ppb
2014-01-215810-902-1155ND
2014-01-215810-903-1120ND
2014-01-215810-904-0950ND
2014-01-215810-905-1225ND
2014-01-215810-906-1340ND
2014-01-215810-907-0930ND
2014-04-215810-900-11553.00 ppb
2014-04-215810-901-09506.00 ppb
2014-04-215810-902-1108ND
2014-04-215810-903-104720.0 ppb
2014-04-215810-904-1019ND
2014-04-215810-905-11293.90 ppb
2014-04-215810-906-1221ND
2014-04-215810-907-09255.60 ppb
2014-07-245810-900-11002.60 ppb
2014-07-245810-901-13055.90 ppb
2014-07-245810-902-1145ND
2014-07-245810-903-1205ND
2014-07-245810-904-1225ND
2014-07-245810-905-1120ND
2014-07-245810-906-1035ND
2014-07-245810-907-12402.00 ppb
2014-10-235810-900-0948ND
2014-10-235810-901-1450ND
2014-10-235810-902-1035ND
2014-10-235810-903-1335ND
2014-10-235810-904-1250ND
2014-10-235810-905-1015ND
2014-10-235810-906-0913ND
2014-10-235810-907-1313ND
2015-01-225810-900-1132ND
2015-01-225810-901-1352ND
2015-01-225810-902-1212ND
2015-01-225810-903-1237ND
2015-01-225810-904-1252ND
2015-01-225810-905-1152ND
2015-01-225810-906-1107ND
2015-01-225810-907-1332ND
2015-04-275810-900-0958ND
2015-04-275810-901-1350ND
2015-04-275810-902-1045ND
2015-04-275810-903-1105ND
2015-04-275810-904-114316.0 ppb
2015-04-275810-905-1027ND
2015-04-275810-906-1418ND
2015-04-275810-907-1320ND
2015-07-235810-900-0925ND
2015-07-235810-901-1150ND
2015-07-235810-902-1010ND
2015-07-235810-903-10353.40 ppb
2015-07-235810-904-1055ND
2015-07-235810-905-0940ND
2015-07-235810-906-0845ND
2015-07-235810-907-1110ND
2015-10-195810-900-1437ND
2015-10-195810-901-1250ND
2015-10-195810-902-1409ND
2015-10-195810-903-13147.00 ppb
2015-10-195810-904-1332ND
2015-10-195810-905-1422ND
2015-10-195810-906-1514ND
2015-10-195810-907-13477.60 ppb
2016-01-195810-900-1135ND
2016-01-195810-901-1115ND
2016-01-195810-902-1000ND
2016-01-195810-903-1020ND
2016-01-195810-904-1040ND
2016-01-195810-905-0950ND
2016-01-195810-906-0920ND
2016-01-195810-907-1055ND
2016-04-195810-900-132421.0 ppb
2016-04-195810-901-121335.0 ppb
2016-04-195810-902-1249ND
2016-04-195810-903-123754.0 ppb
2016-04-195810-904-1150ND
2016-04-195810-905-130816.0 ppb
2016-04-195810-906-1348ND
2016-04-195810-907-1135ND
2016-07-185810-900-090734.0 ppb
2016-07-185810-901-104034.0 ppb
2016-07-185810-902-0950ND
2016-07-185810-903-101550.0 ppb
2016-07-185810-904-110139.0 ppb
2016-07-185810-905-09272.20 ppb
2016-07-185810-906-1312ND
2016-07-185810-907-11205.10 ppb
2016-10-185810-900-105514.0 ppb
2016-10-185810-901-130013.0 ppb
2016-10-185810-902-1140ND
2016-10-185810-903-120037.0 ppb
2016-10-185810-904-1220ND
2016-10-185810-905-1120ND
2016-10-185810-906-1015ND
2016-10-185810-907-1235ND
2017-01-175810-900-1010ND
2017-01-175810-901-1335ND
2017-01-175810-902-10502.60 ppb
2017-01-175810-903-11107.50 ppb
2017-01-175810-904-1140ND
2017-01-175810-905-1035ND
2017-01-175810-906-0920ND
2017-01-175810-907-1150ND
2017-04-185810-900-102736.0 ppb
2017-04-185810-901-143359.0 ppb
2017-04-185810-902-1118ND
2017-04-185810-903-133859.0 ppb
2017-04-185810-904-1137ND
2017-04-185810-905-1059ND
2017-04-185810-906-1001ND
2017-04-185810-907-135653.0 ppb
2017-07-175810-900-13026.70 ppb
2017-07-175810-901-123134.0 ppb
2017-07-175810-902-11522.80 ppb
2017-07-175810-903-121534.0 ppb
2017-07-175810-904-0903ND
2017-07-175810-905-10462.30 ppb
2017-07-175810-906-1113ND
2017-07-175810-907-100632.0 ppb
2017-10-165810-900-1105ND
2017-10-165810-901-133524.0 ppb
2017-10-165810-902-1210ND
2017-10-165810-903-131528.0 ppb
2017-10-165810-904-125032.0 ppb
2017-10-165810-905-1130ND
2017-10-165810-906-1405ND
2017-10-165810-907-124025.0 ppb
2018-01-185810-900-100215.0 ppb
2018-01-185810-901-11058.90 ppb
2018-01-185810-902-1026ND
2018-01-185810-903-105315.0 ppb
2018-01-185810-904-115731.0 ppb
2018-01-185810-905-121912.0 ppb
2018-01-185810-906-0933ND
2018-01-185810-907-1140ND
2018-04-165810-900-1437ND
2018-04-165810-901-1414ND
2018-04-165810-902-1242ND
2018-04-165810-903-13157.70 ppb
2018-04-165810-904-104054.0 ppb
2018-04-165810-905-0951ND
2018-04-165810-906-0920ND
2018-04-165810-907-110827.0 ppb
2018-07-175810-900-094413.0 ppb
2018-07-175810-901-124737.0 ppb
2018-07-175810-902-1031ND
2018-07-175810-903-122834.0 ppb
2018-07-175810-904-120026.0 ppb
2018-07-175810-905-1014ND
2018-07-175810-906-0855ND
2018-07-175810-907-114531.0 ppb
2018-10-175810-900-0935ND
2018-10-175810-901-0825ND
2018-10-175810-902-0910ND
2018-10-175810-903-085519.0 ppb
2018-10-175810-904-0955ND
2018-10-175810-905-0920ND
2018-10-175810-906-0843ND
2018-10-175810-907-100428.0 ppb
2019-01-165810-900-0929ND
2019-01-165810-901-1257ND
2019-01-165810-902-1035ND
2019-01-165810-903-10447.80 ppb
2019-01-165810-904-1115ND
2019-01-165810-905-0957ND
2019-01-165810-906-0850ND
2019-01-165810-907-1231ND
2019-04-165810-900-095030.0 ppb
2019-04-165810-901-115552.0 ppb
2019-04-165810-902-1025ND
2019-04-165810-903-105054.0 ppb
2019-04-165810-904-1135ND
2019-04-165810-905-1005ND
2019-04-165810-906-09208.40 ppb
2019-04-165810-907-112016.0 ppb
2019-07-165810-904-113739.0 ppb
2019-07-165810-905-1158ND
2019-07-165810-906-1248ND
2019-07-165810-907-112732.0 ppb
2019-07-175810-900-101518.0 ppb
2019-07-175810-901-092932.0 ppb
2019-07-175810-902-1002ND
2019-07-175810-903-094718.0 ppb
2019-10-225810-900-121526.0 ppb
2019-10-225810-901-124227.0 ppb
2019-10-225810-902-1013ND
2019-10-225810-903-110218.0 ppb
2019-10-225810-904-113824.0 ppb
2019-10-225810-905-1103ND
2019-10-225810-906-0939ND
2019-10-225810-907-130823.0 ppb