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EWG's Tap Water Database — 2021 UPDATE

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Dibromoacetic acid

Portsmouth Public Water System

Dibromoacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

88

Samples

0

Samples exceeding legal limit (MCL)

41

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.15 ppb129ND - 2.60 ppb
20150.894 ppb169ND - 2.60 ppb
20161.24 ppb168ND - 4.90 ppb
20170.831 ppb166ND - 3.80 ppb
20180.144 ppb162ND - 1.20 ppb
20191.67 ppb127ND - 4.80 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-04-02A140078793ND
2014-04-02A1401830741.30 ppb
2014-04-03A1400787921.30 ppb
2014-04-03A140078794ND
2014-07-02A1401870591.10 ppb
2014-07-02A1401830721.30 ppb
2014-07-02A1401870601.60 ppb
2014-07-02A1401830711.30 ppb
2014-10-01A1402166332.60 ppb
2014-10-02A1402166351.10 ppb
2014-10-02A1402166342.20 ppb
2014-10-02A140216632ND
2015-01-07A1502315861.10 ppb
2015-01-07A1502315871.30 ppb
2015-01-07A150231588ND
2015-01-07A1502315891.20 ppb
2015-04-01A150232165ND
2015-04-01A150232166ND
2015-04-01A150232167ND
2015-04-04A150232168ND
2015-07-01A150310814ND
2015-07-01A1503108131.10 ppb
2015-07-01A1503108121.60 ppb
2015-07-01A150310811ND
2015-10-07A1503286322.60 ppb
2015-10-07A1503286311.40 ppb
2015-10-07A1503286302.50 ppb
2015-10-07A1503286291.50 ppb
2016-01-06A160332078ND
2016-01-06A160332079ND
2016-01-06A160332080ND
2016-01-06A160332077ND
2016-04-06A1603746941.000 ppb
2016-04-06A1603746951.20 ppb
2016-04-06A1603746961.20 ppb
2016-04-06A1603746971.000 ppb
2016-07-05A160399342ND
2016-07-06A160399341ND
2016-07-06A160399343ND
2016-07-06A160399344ND
2016-10-04A1604519183.40 ppb
2016-10-04A1604519194.90 ppb
2016-10-04A1604519204.10 ppb
2016-10-04A1604519213.10 ppb
2017-01-03A170467849ND
2017-01-04A170467848ND
2017-01-04A170467851ND
2017-01-04A170467850ND
2017-04-04A170487408ND
2017-04-04A170487411ND
2017-04-04A170487409ND
2017-04-04A170487410ND
2017-07-04A1704983941.20 ppb
2017-07-05A170498391ND
2017-07-05A1704983921.000 ppb
2017-07-05A170498393ND
2017-10-03A1705397073.80 ppb
2017-10-04A1705397053.30 ppb
2017-10-04A1705397061.80 ppb
2017-10-04A1705397042.20 ppb
2018-01-02A180548472ND
2018-01-02A1805484731.20 ppb
2018-01-02A180548474ND
2018-01-02A180548475ND
2018-04-03A180587705ND
2018-04-03A180587706ND
2018-04-03A180587707ND
2018-04-05A180593233ND
2018-07-02A180614061ND
2018-07-02A180614062ND
2018-07-02A180614063ND
2018-07-02A180593312ND
2018-10-01A180641474ND
2018-10-01A180641476ND
2018-10-01A180641477ND
2018-10-02A1806414751.10 ppb
2019-04-029D00390-03ND
2019-04-029D00390-041.30 ppb
2019-04-029D00390-021.10 ppb
2019-04-029D00390-01ND
2019-07-029G00407-01ND
2019-07-029G00407-02ND
2019-07-029G00407-031.40 ppb
2019-07-029G00407-04ND
2019-10-019J00240-014.70 ppb
2019-10-019J00240-024.10 ppb
2019-10-019J00240-034.80 ppb
2019-10-019J00240-042.60 ppb