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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

East Hanover Twp Water Department

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

122

Samples

0

Samples exceeding legal limit (MCL)

100

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.93 ppb2117ND - 5.80 ppb
20155.04 ppb2018ND - 18.5 ppb
20166.06 ppb2017ND - 24.1 ppb
20176.84 ppb2114ND - 39.7 ppb
20183.25 ppb2016ND - 9.10 ppb
20195.93 ppb2018ND - 22.5 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-233401230451.10 ppb
2014-01-23340123046ND
2014-03-243403240810.600 ppb
2014-03-243403240792.70 ppb
2014-03-243403240773.20 ppb
2014-03-243403240752.00 ppb
2014-05-273405270551.20 ppb
2014-06-16340616092ND
2014-06-163406160902.50 ppb
2014-06-163406160885.30 ppb
2014-06-163406160864.00 ppb
2014-07-213407210530.800 ppb
2014-09-22340922038ND
2014-09-223409220402.10 ppb
2014-09-223409220425.80 ppb
2014-09-223409220442.60 ppb
2014-10-203410200341.000 ppb
2014-12-15341215047ND
2014-12-153412150452.30 ppb
2014-12-153412150432.70 ppb
2014-12-153412150410.600 ppb
2015-01-203501200521.000 ppb
2015-03-16350316039ND
2015-03-16350316033ND
2015-03-163503160357.40 ppb
2015-03-163503160373.30 ppb
2015-04-203504200220.700 ppb
2015-06-153506150560.900 ppb
2015-06-1535061505413.7 ppb
2015-06-1535061505214.0 ppb
2015-06-153506150506.20 ppb
2015-07-203507200530.700 ppb
2015-09-213509210450.500 ppb
2015-09-213509210438.90 ppb
2015-09-2135092104118.5 ppb
2015-09-2135092103914.0 ppb
2015-10-193510191271.30 ppb
2015-12-213512210720.600 ppb
2015-12-213512210704.20 ppb
2015-12-213512210684.30 ppb
2015-12-213512210660.600 ppb
2016-01-193601191061.20 ppb
2016-03-2136032110612.8 ppb
2016-03-213603211046.60 ppb
2016-03-213603211028.50 ppb
2016-03-2136032110013.3 ppb
2016-04-183604181171.30 ppb
2016-06-20360620058ND
2016-06-2036062005612.8 ppb
2016-06-2036062006224.1 ppb
2016-06-203606200606.50 ppb
2016-07-183607180981.20 ppb
2016-09-19360919150ND
2016-09-193609191483.10 ppb
2016-09-1936091914610.3 ppb
2016-09-193609191445.20 ppb
2016-10-173610170721.60 ppb
2016-12-19361219099ND
2016-12-193612190974.20 ppb
2016-12-193612190955.00 ppb
2016-12-193612190933.40 ppb
2017-01-23370123022ND
2017-02-063702060871.000 ppb
2017-03-20370320071ND
2017-03-203703200695.00 ppb
2017-03-203703200675.90 ppb
2017-03-20370320065ND
2017-04-173704170731.60 ppb
2017-06-19370619075ND
2017-06-1937061907321.8 ppb
2017-06-1937061907139.7 ppb
2017-06-1937061906910.9 ppb
2017-07-173707170801.000 ppb
2017-09-18370918066ND
2017-09-1837091806414.4 ppb
2017-09-1837091806225.6 ppb
2017-09-183709180602.80 ppb
2017-10-163710160152.70 ppb
2017-12-18371218117ND
2017-12-183712181156.50 ppb
2017-12-183712181134.70 ppb
2017-12-18371218111ND
2018-01-163801161881.30 ppb
2018-03-19380319074ND
2018-03-193803190725.10 ppb
2018-03-193803190705.70 ppb
2018-03-193803190682.60 ppb
2018-04-163804160621.30 ppb
2018-06-18380618072ND
2018-06-183806180704.00 ppb
2018-06-183806180687.10 ppb
2018-06-183806180662.60 ppb
2018-07-163807160821.20 ppb
2018-09-17380917046ND
2018-09-173809170443.60 ppb
2018-09-173809170429.10 ppb
2018-09-173809170402.60 ppb
2018-10-153810150121.80 ppb
2018-12-17381217012ND
2018-12-173812170106.40 ppb
2018-12-173812170087.80 ppb
2018-12-173812170062.80 ppb
2019-01-223901221271.80 ppb
2019-03-19390320142.122.5 ppb
2019-03-19390320141.16.40 ppb
2019-03-19390320143.19.80 ppb
2019-03-19390320144.120.4 ppb
2019-04-163904172031.40 ppb
2019-06-18390619015.1ND
2019-06-18390619014.14.70 ppb
2019-06-18390619013.19.80 ppb
2019-06-18390619012.13.30 ppb
2019-07-163907160161.20 ppb
2019-09-17390917187.1ND
2019-09-17390917186.15.50 ppb
2019-09-17390917185.110.8 ppb
2019-09-17390917184.12.00 ppb
2019-10-223910221581.40 ppb
2019-12-17391217051.13.00 ppb
2019-12-17391217050.14.10 ppb
2019-12-17391217049.15.70 ppb
2019-12-17391217048.14.70 ppb