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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Lower Valley Water District

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)

151

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201411.5 ppb3229ND - 23.2 ppb
20153.46 ppb3223ND - 13.8 ppb
201610.3 ppb3224ND - 29.2 ppb
201717.5 ppb3227ND - 48.2 ppb
201811.8 ppb3227ND - 39.7 ppb
20197.17 ppb3221ND - 37.6 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
2014-03-11Q14076340023.20 ppb
2014-03-11Q14076340033.80 ppb
2014-03-11Q14076340043.00 ppb
2014-03-11Q14076340052.60 ppb
2014-03-11Q14076340062.50 ppb
2014-03-11Q14076340074.40 ppb
2014-03-11Q1407634008ND
2014-03-11Q14076340093.70 ppb
2014-06-04Q141920400121.8 ppb
2014-06-04Q141920400217.5 ppb
2014-06-04Q141920400611.2 ppb
2014-06-04Q141920400720.0 ppb
2014-06-04Q141920400810.9 ppb
2014-06-04Q141920400317.7 ppb
2014-06-04Q141920400413.5 ppb
2014-06-04Q141920400517.7 ppb
2014-08-12Q143555000120.9 ppb
2014-08-12Q143555000214.0 ppb
2014-08-12Q14355500036.20 ppb
2014-08-12Q143555000416.6 ppb
2014-08-12Q143555000510.5 ppb
2014-08-12Q143555000613.1 ppb
2014-08-12Q143555000718.4 ppb
2014-08-12Q143555000813.2 ppb
2014-10-13Q145211800423.2 ppb
2014-10-13Q145211800518.3 ppb
2014-10-13Q14521180063.40 ppb
2014-10-13Q145211800720.8 ppb
2014-10-13Q1452118008ND
2014-10-13Q145211800117.9 ppb
2014-10-13Q1452118002ND
2014-10-13Q145211800318.5 ppb
2015-01-28Q1503452003ND
2015-01-28Q1503452004ND
2015-01-28Q15034520052.30 ppb
2015-01-28Q15034520063.40 ppb
2015-01-28Q15034520074.00 ppb
2015-01-28Q15034520083.10 ppb
2015-01-28Q1503452009ND
2015-01-28Q1503452010ND
2015-04-28Q1515651001ND
2015-04-28Q1515651002ND
2015-04-28Q15156510031.000 ppb
2015-04-28Q1515651004ND
2015-04-28Q15156510051.000 ppb
2015-04-28Q1515651006ND
2015-04-28Q15156510071.000 ppb
2015-04-28Q15156510081.000 ppb
2015-07-28Q152939600110.9 ppb
2015-07-28Q15293960021.60 ppb
2015-07-28Q15293960032.30 ppb
2015-07-28Q15293960041.80 ppb
2015-07-28Q15293960058.30 ppb
2015-07-28Q15293960065.40 ppb
2015-07-28Q15293960079.00 ppb
2015-07-28Q15293960083.70 ppb
2015-10-19Q15409120011.000 ppb
2015-10-19Q15409120023.80 ppb
2015-10-19Q154091200313.8 ppb
2015-10-19Q154091200411.8 ppb
2015-10-19Q15409120054.60 ppb
2015-10-19Q15409120068.50 ppb
2015-10-19Q15409120077.30 ppb
2015-10-19Q1540912008ND
2016-01-07Q1600391001ND
2016-01-07Q1600391002ND
2016-01-07Q1600391003ND
2016-01-07Q1600391004ND
2016-01-07Q1600391005ND
2016-01-07Q1600391006ND
2016-01-07Q1600391007ND
2016-01-07Q1600391008ND
2016-04-25Q161603200117.5 ppb
2016-04-25Q161603200213.9 ppb
2016-04-25Q161603200323.4 ppb
2016-04-25Q161603200418.6 ppb
2016-04-25Q161603200521.9 ppb
2016-04-25Q161603200610.4 ppb
2016-04-25Q161603200723.4 ppb
2016-04-25Q161603200810.6 ppb
2016-07-19Q162937500125.4 ppb
2016-07-19Q162937500211.8 ppb
2016-07-19Q16293750037.20 ppb
2016-07-19Q162937500429.2 ppb
2016-07-19Q162937500521.4 ppb
2016-07-19Q162937500612.7 ppb
2016-07-19Q162937500721.5 ppb
2016-07-19Q162937500813.5 ppb
2016-11-02Q16474330017.20 ppb
2016-11-02Q16474330055.10 ppb
2016-11-02Q16474330027.80 ppb
2016-11-02Q16474330067.40 ppb
2016-11-02Q16474330035.20 ppb
2016-11-02Q16474330075.00 ppb
2016-11-02Q16474330045.70 ppb
2016-11-02Q16474330083.60 ppb
2017-01-04Q17004110021.10 ppb
2017-01-04Q17004110071.60 ppb
2017-01-04Q1700411003ND
2017-01-04Q17004110081.30 ppb
2017-01-04Q1700411004ND
2017-01-04Q1700411009ND
2017-01-04Q1700411005ND
2017-01-04Q1700411010ND
2017-04-18Q171590300117.1 ppb
2017-04-18Q171590300211.9 ppb
2017-04-18Q171590300319.9 ppb
2017-04-18Q171590300419.5 ppb
2017-04-18Q171590300517.3 ppb
2017-04-18Q171590300612.3 ppb
2017-04-18Q171590300719.6 ppb
2017-04-18Q171590300812.7 ppb
2017-07-19Q173006600540.2 ppb
2017-07-19Q173006600125.7 ppb
2017-07-19Q173006600632.9 ppb
2017-07-19Q173006600233.2 ppb
2017-07-19Q173006600736.1 ppb
2017-07-19Q173006600327.8 ppb
2017-07-19Q173006600848.2 ppb
2017-07-19Q173006600427.2 ppb
2017-10-10Q175177800129.1 ppb
2017-10-10Q175177800213.8 ppb
2017-10-10Q17517780088.40 ppb
2017-10-10Q175177800322.7 ppb
2017-10-10Q175177800425.6 ppb
2017-10-10Q175177800517.1 ppb
2017-10-10Q175177800624.3 ppb
2017-10-10Q175177800714.9 ppb
2018-01-09Q1801264003ND
2018-01-09Q1801264004ND
2018-01-09Q18012640051.20 ppb
2018-01-09Q18012640061.20 ppb
2018-01-09Q1801264007ND
2018-01-09Q1801264008ND
2018-01-09Q18012640091.10 ppb
2018-01-09Q1801264010ND
2018-04-25Q181707000418.5 ppb
2018-04-25Q181707000113.3 ppb
2018-04-25Q181707000522.0 ppb
2018-04-25Q181707000619.3 ppb
2018-04-25Q181707000221.8 ppb
2018-04-25Q181707000713.5 ppb
2018-04-25Q181707000320.3 ppb
2018-04-25Q181707000814.4 ppb
2018-07-02Q182623200122.9 ppb
2018-07-02Q182623200213.8 ppb
2018-07-02Q182623200321.9 ppb
2018-07-02Q182623200430.9 ppb
2018-07-02Q182623200539.7 ppb
2018-07-02Q182623200615.2 ppb
2018-07-02Q182623200725.4 ppb
2018-07-02Q182623200816.7 ppb
2018-10-16Q18415870012.90 ppb
2018-10-16Q18415870021.40 ppb
2018-10-16Q18415870035.70 ppb
2018-10-16Q184158700412.1 ppb
2018-10-16Q18415870059.60 ppb
2018-10-16Q18415870062.90 ppb
2018-10-16Q18415870076.00 ppb
2018-10-16Q18415870083.00 ppb
2019-01-28Q19041230031.10 ppb
2019-01-28Q19041230041.90 ppb
2019-01-28Q19041230051.50 ppb
2019-01-28Q19041230061.000 ppb
2019-01-28Q1904123007ND
2019-01-28Q19041230081.50 ppb
2019-01-28Q1904123009ND
2019-01-28Q19041230101.30 ppb
2019-04-16Q1915398007ND
2019-04-16Q1915398008ND
2019-04-16Q1915398001ND
2019-04-16Q1915398002ND
2019-04-16Q1915398003ND
2019-04-16Q1915398004ND
2019-04-16Q1915398005ND
2019-04-16Q1915398006ND
2019-08-06Q195194700224.4 ppb
2019-08-06Q195194700318.1 ppb
2019-08-06Q195194700423.4 ppb
2019-08-06Q195194700537.6 ppb
2019-08-06Q195194700634.8 ppb
2019-08-06Q195194700721.2 ppb
2019-08-06Q195194700831.4 ppb
2019-08-06Q195194700117.3 ppb
2019-10-30Q19745790081.000 ppb
2019-10-30Q19745790011.000 ppb
2019-10-30Q19745790023.00 ppb
2019-10-30Q19745790031.000 ppb
2019-10-30Q19745790041.000 ppb
2019-10-30Q19745790051.000 ppb
2019-10-30Q19745790065.00 ppb
2019-10-30Q1974579007ND