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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Baton Rouge Water Company

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

 

220

Samples

0

Samples exceeding legal limit (MCL)

148

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.08 ppb4812ND - 8.40 ppb
20151.45 ppb4422ND - 8.60 ppb
20162.92 ppb3220ND - 19.1 ppb
20171.73 ppb32320.870 ppb - 3.60 ppb
20181.99 ppb3230ND - 4.00 ppb
20192.73 ppb32320.600 ppb - 7.10 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
2014-01-14201158146ND
2014-01-14201158146ND
2014-01-15201158149ND
2014-01-15201158150ND
2014-01-15201158151ND
2014-01-152011581528.00 ppb
2014-01-15201158153ND
2014-01-15201158149ND
2014-01-15201158150ND
2014-01-15201158151ND
2014-01-152011581528.00 ppb
2014-01-15201158153ND
2014-04-15202865004ND
2014-04-15202865005ND
2014-04-152028650068.40 ppb
2014-04-15202866002ND
2014-04-15202866003ND
2014-04-15202866006ND
2014-04-15202865004ND
2014-04-15202865005ND
2014-04-152028650068.40 ppb
2014-04-15202866002ND
2014-04-15202866003ND
2014-04-15202866006ND
2014-07-17207090001ND
2014-07-172070900021.000 ppb
2014-07-17207090003ND
2014-07-172070900042.10 ppb
2014-07-17207090005ND
2014-07-17207090006ND
2014-07-17207090001ND
2014-07-172070900021.000 ppb
2014-07-17207090003ND
2014-07-172070900042.10 ppb
2014-07-17207090005ND
2014-07-17207090006ND
2014-10-1720112230011.20 ppb
2014-10-172011223002ND
2014-10-172011223003ND
2014-10-172011223004ND
2014-10-1720112230055.10 ppb
2014-10-172011223006ND
2014-10-1720112230011.20 ppb
2014-10-172011223002ND
2014-10-172011223003ND
2014-10-172011223004ND
2014-10-1720112230055.10 ppb
2014-10-172011223006ND
2015-01-142015090001ND
2015-01-142015090002ND
2015-01-1420150900035.20 ppb
2015-01-142015090004ND
2015-01-1420150900051.20 ppb
2015-01-1420150900061.30 ppb
2015-01-142015090001ND
2015-01-142015090002ND
2015-01-1420150900035.20 ppb
2015-01-142015090004ND
2015-01-1420150900051.20 ppb
2015-01-1420150900061.30 ppb
2015-04-1720188260018.60 ppb
2015-04-172018826002ND
2015-04-172018826003ND
2015-04-1720188260042.80 ppb
2015-04-172018826005ND
2015-04-1720188260061.10 ppb
2015-04-1720188260018.60 ppb
2015-04-172018826002ND
2015-04-172018826003ND
2015-04-1720188260042.80 ppb
2015-04-172018826005ND
2015-04-1720188260061.10 ppb
2015-07-1520228190011.60 ppb
2015-07-152022819002ND
2015-07-152022819003ND
2015-07-1520228190044.40 ppb
2015-07-152022819005ND
2015-07-152022819006ND
2015-07-1520228190011.60 ppb
2015-07-152022819002ND
2015-07-152022819003ND
2015-07-1520228190044.40 ppb
2015-07-152022819005ND
2015-07-152022819006ND
2015-10-152027291001ND
2015-10-1520272910021.30 ppb
2015-10-1520272910031.10 ppb
2015-10-1520272910043.20 ppb
2015-10-152027291001ND
2015-10-1520272910021.30 ppb
2015-10-1520272910031.10 ppb
2015-10-1520272910043.20 ppb
2016-01-152031365001ND
2016-01-15203136500219.1 ppb
2016-01-1520313650036.40 ppb
2016-01-1520313650041.10 ppb
2016-01-152031365001ND
2016-01-15203136500219.1 ppb
2016-01-1520313650036.40 ppb
2016-01-1520313650041.10 ppb
2016-04-182035422001ND
2016-04-1820354220025.00 ppb
2016-04-1820354220031.20 ppb
2016-04-1820354220041.000 ppb
2016-04-182035422001ND
2016-04-1820354220025.00 ppb
2016-04-1820354220031.20 ppb
2016-04-1820354220041.000 ppb
2016-07-182040020001ND
2016-07-1820400200024.30 ppb
2016-07-18204002003ND
2016-07-182040200041.40 ppb
2016-07-182040020001ND
2016-07-1820400200024.30 ppb
2016-07-18204002003ND
2016-07-182040200041.40 ppb
2016-10-2020445030011.90 ppb
2016-10-2020445030025.30 ppb
2016-10-202044503003ND
2016-10-202044503004ND
2016-10-2020445030011.90 ppb
2016-10-2020445030025.30 ppb
2016-10-202044503003ND
2016-10-202044503004ND
2017-01-20352901910020.950 ppb
2017-01-20352901910031.50 ppb
2017-01-20352901910041.30 ppb
2017-01-20352901910053.20 ppb
2017-01-20352901910020.950 ppb
2017-01-20352901910031.50 ppb
2017-01-20352901910041.30 ppb
2017-01-20352901910053.20 ppb
2017-04-13353065080030.910 ppb
2017-04-13353065080040.870 ppb
2017-04-13353065080050.910 ppb
2017-04-13353065080063.40 ppb
2017-04-13353065080030.910 ppb
2017-04-13353065080040.870 ppb
2017-04-13353065080050.910 ppb
2017-04-13353065080063.40 ppb
2017-07-07353226210070.960 ppb
2017-07-07353226210081.20 ppb
2017-07-07353226210091.30 ppb
2017-07-07353226210102.80 ppb
2017-07-07353226210070.960 ppb
2017-07-07353226210081.20 ppb
2017-07-07353226210091.30 ppb
2017-07-07353226210102.80 ppb
2017-10-05353406360012.20 ppb
2017-10-05353406360021.60 ppb
2017-10-05353406360030.920 ppb
2017-10-05353406360043.60 ppb
2017-10-05353406360012.20 ppb
2017-10-05353406360021.60 ppb
2017-10-05353406360030.920 ppb
2017-10-05353406360043.60 ppb
2018-01-12353683490012.20 ppb
2018-01-1235368349002ND
2018-01-12353683490030.950 ppb
2018-01-12353683490043.30 ppb
2018-01-12353683490012.20 ppb
2018-01-1235368349002ND
2018-01-12353683490030.950 ppb
2018-01-12353683490043.30 ppb
2018-04-13353861440012.60 ppb
2018-04-13353861440021.80 ppb
2018-04-13353861440031.40 ppb
2018-04-13353861440040.390 ppb
2018-04-13353861440012.60 ppb
2018-04-13353861440021.80 ppb
2018-04-13353861440031.40 ppb
2018-04-13353861440040.390 ppb
2018-07-06354026090012.19 ppb
2018-07-06354026090021.90 ppb
2018-07-06354026090031.96 ppb
2018-07-06354026090043.70 ppb
2018-07-06354026090012.19 ppb
2018-07-06354026090021.90 ppb
2018-07-06354026090031.96 ppb
2018-07-06354026090043.70 ppb
2018-10-12354240300012.33 ppb
2018-10-12354240300021.60 ppb
2018-10-12354240300031.58 ppb
2018-10-12354240300044.00 ppb
2018-10-12354240300012.33 ppb
2018-10-12354240300021.60 ppb
2018-10-12354240300031.58 ppb
2018-10-12354240300044.00 ppb
2019-01-17354431630012.10 ppb
2019-01-17354431630020.920 ppb
2019-01-17354431630030.900 ppb
2019-01-17354431630047.10 ppb
2019-01-17354431630012.10 ppb
2019-01-17354431630020.920 ppb
2019-01-17354431630030.900 ppb
2019-01-17354431630047.10 ppb
2019-04-08354604860012.30 ppb
2019-04-08354604860020.600 ppb
2019-04-08354604860030.930 ppb
2019-04-08354604860044.80 ppb
2019-04-08354604860012.30 ppb
2019-04-08354604860020.600 ppb
2019-04-08354604860030.930 ppb
2019-04-08354604860044.80 ppb
2019-07-18354835350013.70 ppb
2019-07-18354835350025.10 ppb
2019-07-18354835350033.20 ppb
2019-07-18354835350045.00 ppb
2019-07-18354835350013.70 ppb
2019-07-18354835350025.10 ppb
2019-07-18354835350033.20 ppb
2019-07-18354835350045.00 ppb
2019-10-18355062380011.000 ppb
2019-10-18355062380021.000 ppb
2019-10-18355062380031.10 ppb
2019-10-18355062380044.00 ppb
2019-10-18355062380011.000 ppb
2019-10-18355062380021.000 ppb
2019-10-18355062380031.10 ppb
2019-10-18355062380044.00 ppb