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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Denville 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

 

152

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND310ND
2015ND290ND
2016ND270ND
20170.0304 ppb231ND - 0.700 ppb
2018ND210ND
2019ND210ND

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
2014-01-14340114078ND
2014-02-04340204107ND
2014-03-04340305032ND
2014-03-04340305030ND
2014-03-04340305026ND
2014-03-04340305028ND
2014-03-04340304141ND
2014-04-01340401154.3ND
2014-04-01340401155.3ND
2014-04-01340401156ND
2014-04-08340408177.3ND
2014-05-06340506268ND
2014-06-03340604013ND
2014-06-03340604011ND
2014-06-03340604007ND
2014-06-03340604009ND
2014-06-03340603164ND
2014-07-08340708128ND
2014-08-05340805140ND
2014-09-02340903007ND
2014-09-02340903005ND
2014-09-02340903009ND
2014-09-02340903011ND
2014-09-02340902046ND
2014-10-07341007147ND
2014-11-04341105113ND
2014-12-02341202101ND
2014-12-02341202099ND
2014-12-02341202103ND
2014-12-02341202105ND
2014-12-02341202051ND
2015-01-06350106098ND
2015-02-03350203044ND
2015-03-03350303148ND
2015-03-03350303146ND
2015-03-03350303150ND
2015-03-03350303152ND
2015-03-03350303143ND
2015-04-07350407163ND
2015-04-07350407162ND
2015-05-05350505117ND
2015-06-02350602103ND
2015-06-02350602101ND
2015-06-02350602097ND
2015-06-02350602099ND
2015-06-02350602105ND
2015-07-07350707068ND
2015-08-04350804127ND
2015-09-01350901126ND
2015-09-01350901124ND
2015-09-01350901128ND
2015-09-01350901130ND
2015-09-01350901123ND
2015-10-06351006106ND
2015-11-03351103088ND
2015-12-01351201099ND
2015-12-01351201097ND
2015-12-01351201101ND
2015-12-01351201103ND
2015-12-01351201112ND
2016-01-05360105079ND
2016-02-02360202155ND
2016-03-01360301148ND
2016-03-01360301146ND
2016-03-01360301142ND
2016-03-01360301144ND
2016-03-01360301150ND
2016-04-05360405191ND
2016-04-05360405190ND
2016-05-03360503107ND
2016-06-01360601014ND
2016-06-01360601012ND
2016-06-01360601008ND
2016-06-01360601010ND
2016-06-07360607137ND
2016-07-05360705111ND
2016-08-02360802117ND
2016-09-01360901016ND
2016-09-01360901014ND
2016-09-01360901010ND
2016-09-01360901012ND
2016-09-06360906082ND
2016-10-04361004130ND
2016-12-01361201020ND
2016-12-01361201018ND
2016-12-01361201022ND
2016-12-01361201024ND
2017-01-03370103163ND
2017-03-01370301012ND
2017-03-01370301010ND
2017-03-01370301006ND
2017-03-01370301008ND
2017-04-04370404083ND
2017-04-18370418287ND
2017-05-02370502084.3ND
2017-05-02370502085.3ND
2017-06-01370601017ND
2017-06-01370601015ND
2017-06-01370601019ND
2017-06-01370601021ND
2017-07-11370711125ND
2017-09-01370901008ND
2017-09-01370901006ND
2017-09-01370901010ND
2017-09-01370901012ND
2017-10-03371003116ND
2017-12-01371201012ND
2017-12-013712010100.700 ppb
2017-12-01371201014ND
2017-12-01371201016ND
2018-02-06380206072ND
2018-03-02380302008ND
2018-03-02380302006ND
2018-03-02380302002ND
2018-03-02380302004ND
2018-04-03380403121ND
2018-04-03380403120ND
2018-06-04380604011ND
2018-06-04380604009ND
2018-06-04380604013ND
2018-06-04380604015ND
2018-07-03380703181ND
2018-09-04380904054ND
2018-09-04380904052ND
2018-09-04380904048ND
2018-09-04380904050ND
2018-10-02381002158ND
2018-12-03381203008ND
2018-12-03381203006ND
2018-12-03381203010ND
2018-12-03381203012ND
2019-01-08390108142ND
2019-03-05390305164ND
2019-03-05390305162ND
2019-03-05390305158ND
2019-03-05390305160ND
2019-04-02390402240ND
2019-04-02390402238ND
2019-06-04390604150ND
2019-06-04390604148ND
2019-06-04390604152ND
2019-06-04390604154ND
2019-07-02390702171ND
2019-09-04390904007.1AND
2019-09-04390904006.1AND
2019-09-04390904008.1AND
2019-09-04390904009.1AND
2019-10-01391001220ND
2019-12-04391204011ND
2019-12-04391204009ND
2019-12-04391204013ND
2019-12-04391204015ND