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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Aqua NJ - Hamilton Square

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

 

138

Samples

0

Samples exceeding legal limit (MCL)

89

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.924 ppb2914ND - 7.60 ppb
20150.436 ppb3313ND - 2.10 ppb
20160.971 ppb2113ND - 3.40 ppb
20173.18 ppb2019ND - 17.7 ppb
20181.76 ppb1916ND - 10.1 ppb
20191.11 ppb1614ND - 3.30 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
2014-01-06AE200851.40 ppb
2014-01-06AE20084ND
2014-01-06AE200830.900 ppb
2014-01-06AE20082ND
2014-02-11AE23625ND
2014-02-19AE24424ND
2014-04-07AE291770.700 ppb
2014-04-07AE291761.10 ppb
2014-04-07AE291750.700 ppb
2014-04-07AE29169ND
2014-04-08AE29174ND
2014-05-20AE33858ND
2014-05-27AE346714.00 ppb
2014-05-27AE34683ND
2014-06-16AE36991ND
2014-07-02AE39017ND
2014-07-07AE396541.90 ppb
2014-07-07AE396532.00 ppb
2014-07-07AE396527.60 ppb
2014-07-07AE396510.700 ppb
2014-08-05AE43582ND
2014-09-08AE47809ND
2014-10-02AE51884ND
2014-10-06AE518790.800 ppb
2014-10-06AE518782.60 ppb
2014-10-07AE518811.80 ppb
2014-10-07AE518800.600 ppb
2014-11-03AE55707ND
2014-12-03AE59190ND
2015-01-05AE616990.500 ppb
2015-01-05AE616981.40 ppb
2015-01-06AE617010.900 ppb
2015-01-06AE61700ND
2015-01-13AE62762ND
2015-01-13AE627630.500 ppb
2015-01-13AE62549ND
2015-02-03AE64757ND
2015-03-04AE67796ND
2015-04-01AE70879ND
2015-04-06AE715011.10 ppb
2015-04-06AE715000.600 ppb
2015-04-07AE715031.000 ppb
2015-04-07AE715020.800 ppb
2015-05-04AE74500ND
2015-06-10AE78972ND
2015-06-17AE80148ND
2015-07-01AE81973ND
2015-07-06AE825852.10 ppb
2015-07-06AE82584ND
2015-07-07AE825861.80 ppb
2015-07-07AE82583ND
2015-08-11AE87915ND
2015-09-01AE90412ND
2015-10-05AE946821.80 ppb
2015-10-05AE946811.30 ppb
2015-10-06AE946840.600 ppb
2015-10-06AE94683ND
2015-10-30AE97965ND
2015-11-09AE99017ND
2015-11-10AE99026ND
2015-12-01AF01521ND
2015-12-09AF02506ND
2016-01-04AF042121.20 ppb
2016-01-04AF042110.600 ppb
2016-01-05AF04213ND
2016-01-06AF043911.000 ppb
2016-01-06AF04396ND
2016-01-06AF04397ND
2016-01-06AF04400ND
2016-02-03AF06989ND
2016-03-01AF09372ND
2016-04-06AF123281.000 ppb
2016-04-06AF123270.700 ppb
2016-04-06AF123260.700 ppb
2016-04-06AF12325ND
2016-07-05AF210942.90 ppb
2016-07-05AF210931.70 ppb
2016-07-06AF210952.10 ppb
2016-07-06AF210921.60 ppb
2016-10-05AF320331.50 ppb
2016-10-05AF320323.40 ppb
2016-10-05AF320312.00 ppb
2016-10-05AF32030ND
2017-01-03AF398701.50 ppb
2017-01-03AF398690.600 ppb
2017-01-04AF39872ND
2017-01-04AF398713.90 ppb
2017-04-05AF475331.30 ppb
2017-04-05AF475321.20 ppb
2017-04-05AF475312.00 ppb
2017-04-05AF475303.00 ppb
2017-07-06AF563581.30 ppb
2017-07-06AF563572.80 ppb
2017-07-06AF563561.50 ppb
2017-07-06AF563552.30 ppb
2017-07-24AF5834617.7 ppb
2017-07-24AF5834515.3 ppb
2017-07-25AF583480.500 ppb
2017-07-25AF583470.900 ppb
2017-10-04AF657600.900 ppb
2017-10-04AF657592.30 ppb
2017-10-04AF657582.20 ppb
2017-10-04AF657572.30 ppb
2018-01-04AF732200.800 ppb
2018-01-04AF732191.10 ppb
2018-01-04AF732180.800 ppb
2018-01-04AF732171.20 ppb
2018-04-04AF806820.500 ppb
2018-04-04AF806811.20 ppb
2018-04-05AF808781.30 ppb
2018-04-18AF819281.000 ppb
2018-04-23AF82269ND
2018-04-30L7021619-1ND
2018-05-14L7027932-1ND
2018-07-05AF890601.80 ppb
2018-07-05AF890597.10 ppb
2018-07-05AF8905810.1 ppb
2018-07-05AF890571.10 ppb
2018-10-02AF975601.50 ppb
2018-10-02AF975591.40 ppb
2018-10-02AF975581.30 ppb
2018-10-02AF975571.30 ppb
2019-01-04AG057880.700 ppb
2019-01-04AG057870.800 ppb
2019-01-04AG057860.700 ppb
2019-01-04AG05785ND
2019-04-08AG138810.500 ppb
2019-04-08AG138800.600 ppb
2019-04-09AG138830.600 ppb
2019-04-09AG13882ND
2019-07-01AG230432.10 ppb
2019-07-01AG230420.800 ppb
2019-07-02AG230442.10 ppb
2019-07-02AG230410.600 ppb
2019-10-09AG354683.20 ppb
2019-10-09AG354673.30 ppb
2019-10-09AG354661.10 ppb
2019-10-09AG354650.600 ppb