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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Parsippany-Troy Hills 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

 

281

Samples

0

Samples exceeding legal limit (MCL)

100

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.07 ppb5815ND - 40.6 ppb
20155.48 ppb4715ND - 43.9 ppb
20163.75 ppb4915ND - 33.7 ppb
20175.31 ppb5017ND - 35.3 ppb
20185.53 ppb3920ND - 32.2 ppb
201910.0 ppb3818ND - 57.0 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
2014-03-053403071231.70 ppb
2014-03-05340307121ND
2014-03-05340307119ND
2014-03-053403071170.600 ppb
2014-03-05340307109ND
2014-03-053403071150.600 ppb
2014-03-05340307113ND
2014-03-05340307111ND
2014-03-06340307105ND
2014-03-06340307106ND
2014-06-03340606102ND
2014-06-043406061001.60 ppb
2014-06-0434060609816.2 ppb
2014-06-04340606096ND
2014-06-04340606094ND
2014-06-04340606086ND
2014-06-0434060609214.3 ppb
2014-06-0434060609015.6 ppb
2014-06-0434060608817.4 ppb
2014-06-254060811-01ND
2014-07-104070305-01ND
2014-07-234070731-01ND
2014-08-064080175-01ND
2014-08-184080685-01ND
2014-09-034090040-01ND
2014-09-03380907179ND
2014-09-043409050810.600 ppb
2014-09-0434090507917.3 ppb
2014-09-04340905077ND
2014-09-04340905075ND
2014-09-04340905067ND
2014-09-0434090507322.0 ppb
2014-09-0434090507140.6 ppb
2014-09-0434090506925.0 ppb
2014-09-17340919074.2ND
2014-09-17340919075.2ND
2014-09-17340919076.2ND
2014-09-17340919077.2ND
2014-09-17340919078.2ND
2014-09-17340919069.2ND
2014-09-17340919070.2ND
2014-09-17340919071.2ND
2014-09-17340919072.2ND
2014-09-17340919073.2ND
2014-09-17340919080.2ND
2014-09-17340919079.2ND
2014-10-084100262-01ND
2014-10-284100821-01ND
2014-11-134110375-01ND
2014-12-02341205123ND
2014-12-043412051201.60 ppb
2014-12-04341205118ND
2014-12-04341205116ND
2014-12-04341205114ND
2014-12-04341205106ND
2014-12-043412051123.20 ppb
2014-12-04341205110ND
2014-12-04341205108ND
2015-03-03350306069ND
2015-03-03350306070ND
2015-03-04350306087ND
2015-03-04350306085ND
2015-03-04350306083ND
2015-03-04350306081ND
2015-03-04350306073ND
2015-03-043503060790.700 ppb
2015-03-04350306077ND
2015-03-04350306075ND
2015-06-03350605148ND
2015-06-043506051465.00 ppb
2015-06-0435060514435.6 ppb
2015-06-043506051420.600 ppb
2015-06-04350605140ND
2015-06-043506051320.800 ppb
2015-06-0435060513824.7 ppb
2015-06-0435060513636.4 ppb
2015-06-0435060513431.4 ppb
2015-09-043509081091.80 ppb
2015-09-0435090810715.7 ppb
2015-09-04350908105ND
2015-09-04350908103ND
2015-09-04350908095ND
2015-09-0435090810118.9 ppb
2015-09-0435090809943.9 ppb
2015-09-0435090809740.2 ppb
2015-09-16350918112.1ND
2015-09-16350918114.1ND
2015-09-16350918115ND
2015-09-16350918123.1ND
2015-09-16350918117.1ND
2015-09-16350918118.1ND
2015-09-16350918119.1ND
2015-09-16350918120.1ND
2015-09-16350918122.1ND
2015-09-16350918121.1ND
2015-12-043512071191.000 ppb
2015-12-04351207117ND
2015-12-04351207115ND
2015-12-04351207113ND
2015-12-043512071050.800 ppb
2015-12-04351207111ND
2015-12-04351207109ND
2015-12-04351207107ND
2015-12-04351207124ND
2015-12-04351207123ND
2016-03-04360307083ND
2016-03-04360307085ND
2016-03-04360307084ND
2016-03-14360316112ND
2016-03-14360316110ND
2016-03-143603161000.500 ppb
2016-03-14360316104ND
2016-03-14360316102ND
2016-03-153603161141.20 ppb
2016-03-16360316108ND
2016-03-16360316106ND
2016-06-063606081334.50 ppb
2016-06-063606081312.40 ppb
2016-06-06360608129ND
2016-06-06360608127ND
2016-06-06360608119ND
2016-06-0636060812525.8 ppb
2016-06-0636060812315.0 ppb
2016-06-0636060812114.1 ppb
2016-06-06360608136ND
2016-06-06360608138ND
2016-06-06360608137ND
2016-09-063609080523.70 ppb
2016-09-0636090805017.7 ppb
2016-09-06360908048ND
2016-09-06360908046ND
2016-09-06360908038ND
2016-09-0636090804418.2 ppb
2016-09-0636090804232.8 ppb
2016-09-0636090804033.7 ppb
2016-09-06360908063.1ND
2016-09-06360908065.1ND
2016-09-06360908066ND
2016-09-06360908056.1ND
2016-09-06360908059.1ND
2016-09-06360908061.1ND
2016-09-06360908060.1ND
2016-09-07360908058.1ND
2016-09-16360908057.1ND
2016-11-29361207095ND
2016-11-29361207094ND
2016-12-0536120709112.8 ppb
2016-12-05361207089ND
2016-12-053612070870.600 ppb
2016-12-05361207085ND
2016-12-05361207077ND
2016-12-053612070830.800 ppb
2016-12-05361207081ND
2016-12-05361207079ND
2017-03-063703081772.00 ppb
2017-03-06370308175ND
2017-03-06370308173ND
2017-03-06370308171ND
2017-03-06370308163ND
2017-03-06370308169ND
2017-03-06370308167ND
2017-03-06370308165ND
2017-03-06370308159ND
2017-03-06370308161ND
2017-03-06370308160ND
2017-05-03370505115ND
2017-06-063706082181.50 ppb
2017-06-0637060821635.3 ppb
2017-06-06370608214ND
2017-06-06370608212ND
2017-06-06370608204ND
2017-06-0637060821012.8 ppb
2017-06-0637060820814.9 ppb
2017-06-0637060820617.8 ppb
2017-06-06370608221ND
2017-06-06370608222ND
2017-09-063709080883.80 ppb
2017-09-0637090808624.8 ppb
2017-09-063709080840.600 ppb
2017-09-06370908082ND
2017-09-06370908074ND
2017-09-0637090808015.5 ppb
2017-09-0637090807819.4 ppb
2017-09-0637090807623.0 ppb
2017-09-13370915020.4ND
2017-09-13370915022.4ND
2017-09-13370915023.3ND
2017-09-13370915024.4ND
2017-09-13370915025.4ND
2017-09-13370915026.4ND
2017-09-13370915027.4ND
2017-09-13370915028.4ND
2017-09-13370915029.4ND
2017-09-13370915030.4ND
2017-09-13370915031ND
2017-12-053712071852.00 ppb
2017-12-0537120718322.6 ppb
2017-12-05371207181ND
2017-12-05371207179ND
2017-12-05371207171ND
2017-12-0537120717716.4 ppb
2017-12-0537120717534.4 ppb
2017-12-0537120717318.5 ppb
2017-12-06371207189ND
2018-03-063803081339.40 ppb
2018-03-06380308131ND
2018-03-06380308129ND
2018-03-06380308127ND
2018-03-06380308119ND
2018-03-06380308125ND
2018-03-063803081230.500 ppb
2018-03-063803081210.500 ppb
2018-03-06380308136ND
2018-03-06380308137ND
2018-06-043806071953.30 ppb
2018-06-043806071930.500 ppb
2018-06-04380607191ND
2018-06-04380607189ND
2018-06-04380607181ND
2018-06-043806071872.20 ppb
2018-06-043806071850.600 ppb
2018-06-043806071830.700 ppb
2018-06-05380607198ND
2018-09-04380907181AND
2018-09-053809071765.90 ppb
2018-09-0538090717432.2 ppb
2018-09-053809071720.600 ppb
2018-09-053809071700.600 ppb
2018-09-05380907162ND
2018-09-0538090716823.8 ppb
2018-09-0538090716625.7 ppb
2018-09-0538090716426.2 ppb
2018-09-05380907180AND
2018-10-16381019051ND
2018-10-16381019052ND
2018-12-053812050666.60 ppb
2018-12-0538120506419.1 ppb
2018-12-05381205062ND
2018-12-05381205060ND
2018-12-05381205052ND
2018-12-0538120505812.8 ppb
2018-12-0538120505630.7 ppb
2018-12-0538120505413.6 ppb
2019-03-06390307137.17.30 ppb
2019-03-06390307136.1ND
2019-03-06390307135.1ND
2019-03-06390307133.1ND
2019-03-06390307129.1ND
2019-03-06390307132.10.700 ppb
2019-03-06390307131.1ND
2019-03-06390307130.1ND
2019-03-06390307139ND
2019-06-05390607123.157.0 ppb
2019-06-05390607122.119.0 ppb
2019-06-05390607119.10.500 ppb
2019-06-05390607121.1ND
2019-06-05390607115.1ND
2019-06-05390607118.124.9 ppb
2019-06-05390607117.131.1 ppb
2019-06-05390607116.132.0 ppb
2019-06-12390613033ND
2019-09-05390906137.1ND
2019-09-05390906136.111.2 ppb
2019-09-05390906135.10.700 ppb
2019-09-05390906133.10.500 ppb
2019-09-05390906129.1ND
2019-09-05390906132.128.9 ppb
2019-09-05390906131.144.6 ppb
2019-09-05390906130.143.6 ppb
2019-09-05390906123.1ND
2019-09-05390906125.1ND
2019-09-05390906124.1ND
2019-12-04391205131.1ND
2019-12-04391205130.119.9 ppb
2019-12-04391205129.1ND
2019-12-04391205127.1ND
2019-12-04391205123.1ND
2019-12-04391205126.111.6 ppb
2019-12-04391205125.119.4 ppb
2019-12-04391205124.128.0 ppb
2019-12-04391205133ND