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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Pequannock 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

 

136

Samples

0

Samples exceeding legal limit (MCL)

121

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201427.8 ppb1916ND - 48.1 ppb
201536.6 ppb1915ND - 73.1 ppb
201629.5 ppb1816ND - 43.9 ppb
201737.3 ppb1816ND - 58.1 ppb
201854.4 ppb1816ND - 114.0 ppb
201926.3 ppb4442ND - 84.8 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
2014-03-1834031806545.0 ppb
2014-03-1834031806330.6 ppb
2014-03-1834031806724.3 ppb
2014-03-1834031806124.0 ppb
2014-04-09340410030ND
2014-06-1034061004739.6 ppb
2014-06-1034061004540.3 ppb
2014-06-1034061004336.4 ppb
2014-06-1034061004136.5 ppb
2014-06-17340617116ND
2014-07-01340701035ND
2014-09-0934090914331.1 ppb
2014-09-0934090914142.8 ppb
2014-09-0934090913935.8 ppb
2014-09-0934090913748.1 ppb
2014-12-0834120906627.5 ppb
2014-12-0834120906424.0 ppb
2014-12-0834120906219.1 ppb
2014-12-0834120906022.6 ppb
2015-03-103503100802.90 ppb
2015-03-103503100786.20 ppb
2015-03-10350310076ND
2015-03-1035031007422.2 ppb
2015-04-07350407049.1ND
2015-05-14350515016ND
2015-06-0835060919651.8 ppb
2015-06-0835060919459.1 ppb
2015-06-0835060919233.6 ppb
2015-06-0835060919046.9 ppb
2015-07-07350707151.2ND
2015-09-0835090809273.1 ppb
2015-09-0835090809070.4 ppb
2015-09-0835090808861.3 ppb
2015-09-0835090808666.9 ppb
2015-12-0835120817349.2 ppb
2015-12-0835120817152.4 ppb
2015-12-0835120816947.4 ppb
2015-12-0835120816751.6 ppb
2016-03-0836030813323.4 ppb
2016-03-0836030813121.1 ppb
2016-03-0836030812920.1 ppb
2016-03-0836030812619.2 ppb
2016-04-19360419173.2ND
2016-06-0636060801840.7 ppb
2016-06-0636060801643.9 ppb
2016-06-0636060801431.4 ppb
2016-06-0636060802037.6 ppb
2016-07-05360705058.2ND
2016-09-0636090619140.7 ppb
2016-09-0636090618939.1 ppb
2016-09-0636090618724.3 ppb
2016-09-0636090618541.9 ppb
2016-12-0636120617537.5 ppb
2016-12-0636120617338.2 ppb
2016-12-0636120617134.4 ppb
2016-12-0636120616937.6 ppb
2017-03-0737030719942.0 ppb
2017-03-0737030719741.8 ppb
2017-03-0737030719533.8 ppb
2017-03-0737030719341.2 ppb
2017-06-0637060613652.4 ppb
2017-06-0637060613450.9 ppb
2017-06-0637060613247.1 ppb
2017-06-0637060613050.8 ppb
2017-06-13370613116ND
2017-07-25370725094ND
2017-09-0537090514353.9 ppb
2017-09-0537090514149.9 ppb
2017-09-0537090513938.4 ppb
2017-09-0537090513758.1 ppb
2017-12-0537120520932.0 ppb
2017-12-0537120520332.8 ppb
2017-12-0537120520821.9 ppb
2017-12-0537120520525.2 ppb
2018-03-0638030615327.4 ppb
2018-03-0638030615130.6 ppb
2018-03-0638030614925.3 ppb
2018-03-0638030614730.2 ppb
2018-04-24380424073.2ND
2018-06-19380619046103.0 ppb
2018-06-19380619044114.0 ppb
2018-06-1938061904298.4 ppb
2018-06-1938061904099.4 ppb
2018-08-07380807192ND
2018-09-0438090515366.4 ppb
2018-09-0438090515964.3 ppb
2018-09-0438090515756.3 ppb
2018-09-0438090515566.0 ppb
2018-12-0438120411953.7 ppb
2018-12-0438120412160.7 ppb
2018-12-0438120412642.2 ppb
2018-12-0438120412340.6 ppb
2019-03-0539030520240.2 ppb
2019-03-0539030520037.8 ppb
2019-03-0539030519836.7 ppb
2019-03-0539030519635.2 ppb
2019-04-02390402164.2ND
2019-06-1839061824230.4 ppb
2019-06-1839061824024.7 ppb
2019-06-1839061823820.2 ppb
2019-06-1839061823628.5 ppb
2019-07-16390716226ND
2019-07-23390723085.357.3 ppb
2019-07-23390723086.130.3 ppb
2019-07-23390723088.128.5 ppb
2019-07-23390723089.126.8 ppb
2019-07-23390723087.128.5 ppb
2019-08-15390815244.184.8 ppb
2019-08-15390815243.128.8 ppb
2019-08-15390815242.125.1 ppb
2019-08-15390815241.125.8 ppb
2019-08-15390815240.132.0 ppb
2019-09-05390905215.263.1 ppb
2019-09-05390905213.115.3 ppb
2019-09-05390905212.124.4 ppb
2019-09-05390905211.125.1 ppb
2019-09-05390905210.128.9 ppb
2019-09-1139091126016.4 ppb
2019-10-09391009154.132.1 ppb
2019-10-09391009149.119.0 ppb
2019-10-09391009152.118.1 ppb
2019-10-09391009151.115.6 ppb
2019-10-09391009150.113.5 ppb
2019-10-09391009153.112.0 ppb
2019-11-13391113172.132.6 ppb
2019-11-13391113171.123.8 ppb
2019-11-13391113170.123.0 ppb
2019-11-13391113169.113.7 ppb
2019-11-13391113168.118.9 ppb
2019-11-13391113173.112.9 ppb
2019-12-11391211132.133.0 ppb
2019-12-11391211131.133.0 ppb
2019-12-11391211130.120.5 ppb
2019-12-11391211129.114.1 ppb
2019-12-11391211128.116.9 ppb
2019-12-11391211133.110.4 ppb