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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Amarillo Municipal Water System

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

 

173

Samples

0

Samples exceeding legal limit (MCL)

116

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20145.58 ppb3219ND - 35.1 ppb
201510.4 ppb3224ND - 24.7 ppb
20169.79 ppb3224ND - 30.3 ppb
20178.54 ppb3222ND - 21.5 ppb
20189.73 ppb3227ND - 27.6 ppb
2019ND130ND

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
2014-03-04Q14068980122.50 ppb
2014-03-04Q14068980014.00 ppb
2014-03-04Q14068980023.30 ppb
2014-03-04Q14068980032.40 ppb
2014-03-04Q14068980042.70 ppb
2014-03-04Q1406898005ND
2014-03-04Q14068980067.10 ppb
2014-03-04Q14068980073.40 ppb
2014-05-21Q1417423010ND
2014-05-21Q14174230112.60 ppb
2014-05-21Q1417423012ND
2014-05-21Q1417423013ND
2014-05-21Q14174230142.70 ppb
2014-05-21Q14174230172.00 ppb
2014-05-21Q14174230182.50 ppb
2014-05-21Q14174230232.30 ppb
2014-07-16Q1428664002ND
2014-07-16Q142866400313.8 ppb
2014-07-16Q1428664004ND
2014-07-16Q142866400511.4 ppb
2014-07-16Q142866400611.4 ppb
2014-07-16Q1428664007ND
2014-07-16Q142866400813.9 ppb
2014-07-16Q1428664009ND
2014-10-27Q1454208009ND
2014-10-27Q145420800135.1 ppb
2014-10-27Q1454208002ND
2014-10-27Q1454208003ND
2014-10-27Q145420800429.5 ppb
2014-10-27Q1454208005ND
2014-10-27Q145420800625.9 ppb
2014-10-27Q1454208007ND
2015-02-25Q150740800812.9 ppb
2015-02-25Q150740800911.6 ppb
2015-02-25Q1507408010ND
2015-02-25Q150740801110.1 ppb
2015-02-25Q150740801213.6 ppb
2015-02-25Q15074080135.80 ppb
2015-02-25Q15074080149.80 ppb
2015-02-25Q15074080153.80 ppb
2015-04-28Q151558301814.0 ppb
2015-04-28Q151558301914.0 ppb
2015-04-28Q1515583020ND
2015-04-28Q151558302113.8 ppb
2015-04-28Q151558302212.9 ppb
2015-04-28Q15155830237.50 ppb
2015-04-28Q151558302413.9 ppb
2015-04-28Q1515583017ND
2015-07-22Q15284060025.90 ppb
2015-07-22Q152840600315.0 ppb
2015-07-22Q1528406004ND
2015-07-22Q152840600513.2 ppb
2015-07-22Q152840600612.8 ppb
2015-07-22Q1528406007ND
2015-07-22Q152840600813.8 ppb
2015-07-22Q1528406009ND
2015-11-17Q154528900220.1 ppb
2015-11-17Q154528900321.8 ppb
2015-11-17Q1545289004ND
2015-11-17Q154528900524.7 ppb
2015-11-17Q154528900619.6 ppb
2015-11-17Q154528900720.1 ppb
2015-11-17Q154528900822.8 ppb
2015-11-17Q1545289009ND
2016-02-22Q1607546004ND
2016-02-22Q160754600513.9 ppb
2016-02-22Q1607546022ND
2016-02-22Q1607546023ND
2016-02-22Q160754602416.4 ppb
2016-02-22Q1607546012ND
2016-02-22Q160754601310.00 ppb
2016-02-22Q1607546014ND
2016-04-19Q161567701916.4 ppb
2016-04-19Q161567702017.0 ppb
2016-04-19Q1615677021ND
2016-04-19Q161567702218.3 ppb
2016-04-19Q161567702330.3 ppb
2016-04-19Q1615677024ND
2016-04-19Q161567702525.0 ppb
2016-04-19Q16156770269.60 ppb
2016-09-27Q164071701217.6 ppb
2016-09-27Q164071701313.9 ppb
2016-09-27Q164071700812.2 ppb
2016-09-27Q16407170103.50 ppb
2016-09-27Q164071702210.7 ppb
2016-09-27Q1640717009ND
2016-09-27Q164071701414.8 ppb
2016-09-27Q16407170076.30 ppb
2016-10-25Q164525500120.5 ppb
2016-10-25Q164525500714.8 ppb
2016-10-25Q16452550023.40 ppb
2016-10-25Q16452550085.10 ppb
2016-10-25Q164525500314.2 ppb
2016-10-25Q16452550091.40 ppb
2016-10-25Q164525500410.5 ppb
2016-10-25Q16452550107.50 ppb
2017-02-07Q170518701913.1 ppb
2017-02-07Q170518702018.6 ppb
2017-02-07Q1705187021ND
2017-02-07Q170518702211.9 ppb
2017-02-07Q170518702316.8 ppb
2017-02-07Q1705187024ND
2017-02-07Q170518702515.8 ppb
2017-02-07Q1705187026ND
2017-05-02Q171790301421.5 ppb
2017-05-02Q171790301520.7 ppb
2017-05-02Q17179030165.80 ppb
2017-05-02Q17179030175.10 ppb
2017-05-02Q171790301814.4 ppb
2017-05-02Q17179030197.60 ppb
2017-05-02Q171790302114.1 ppb
2017-05-02Q17179030204.40 ppb
2017-09-05Q17410280155.10 ppb
2017-09-05Q174102801613.2 ppb
2017-09-05Q1741028017ND
2017-09-05Q1741028001ND
2017-09-05Q174102800214.7 ppb
2017-09-05Q1741028003ND
2017-09-05Q174102800415.0 ppb
2017-09-05Q1741028005ND
2017-11-16Q175892400210.6 ppb
2017-11-16Q175892400314.8 ppb
2017-11-16Q1758924004ND
2017-11-16Q1758924005ND
2017-11-16Q175892400615.5 ppb
2017-11-16Q17589240071.10 ppb
2017-11-16Q175892400813.4 ppb
2017-11-16Q1758924009ND
2018-02-13Q180577801310.3 ppb
2018-02-13Q180577801414.4 ppb
2018-02-13Q1805778015ND
2018-02-13Q18057780161.50 ppb
2018-02-13Q180577801714.5 ppb
2018-02-13Q1805778018ND
2018-02-13Q180577801913.6 ppb
2018-02-13Q1805778020ND
2018-05-15Q181974100916.4 ppb
2018-05-15Q181974101023.5 ppb
2018-05-15Q18197410022.10 ppb
2018-05-15Q18197410111.20 ppb
2018-05-15Q181974101220.4 ppb
2018-05-15Q18197410031.30 ppb
2018-05-15Q181974100419.8 ppb
2018-05-15Q18197410051.40 ppb
2018-08-20Q18330800128.80 ppb
2018-08-20Q183308000525.2 ppb
2018-08-20Q18330800091.50 ppb
2018-08-20Q18330800062.80 ppb
2018-08-20Q183308001325.7 ppb
2018-08-20Q18330800071.60 ppb
2018-08-20Q183308001427.6 ppb
2018-08-20Q18330800081.60 ppb
2018-11-14Q184595400216.1 ppb
2018-11-14Q184595400119.2 ppb
2018-11-14Q18459540031.60 ppb
2018-11-14Q18459540041.20 ppb
2018-11-14Q184595400518.6 ppb
2018-11-14Q1845954006ND
2018-11-14Q184595400719.6 ppb
2018-11-14Q1845954008ND
2019-01-24Q1903570010ND
2019-01-24Q1903570011ND
2019-05-02Q1918377015ND
2019-07-10Q1943223005ND
2019-07-10Q1943223006ND
2019-07-10Q1943223008ND
2019-07-10Q1943223010ND
2019-11-19Q1977325001ND
2019-11-19Q1977325002ND
2019-11-19Q1977325003ND
2019-11-19Q1977325004ND
2019-11-19Q1977325006ND
2019-11-19Q1977325008ND