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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Merchantville Pennsauken

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

 

218

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.723 ppb3810ND - 5.89 ppb
20150.0583 ppb414ND - 0.768 ppb
20160.151 ppb243ND - 1.92 ppb
20170.0156 ppb321ND - 0.500 ppb
20180.259 ppb3212ND - 1.20 ppb
20190.128 ppb515ND - 3.70 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
2014-02-07140207/2145-04TND
2014-02-07140207/2145-03TND
2014-02-07140207/2145-02T0.751 ppb
2014-02-07140207/2145-01TND
2014-03-1014031564-002ND
2014-03-1014031564-001ND
2014-03-1014031564-003ND
2014-03-1014031564-004ND
2014-05-08140508/2276-02T0.500 ppb
2014-05-08140508/2276-03TND
2014-05-08140508/2276-04TND
2014-05-08140508/2276-01TND
2014-06-1314061879-001ND
2014-06-1314061879-004ND
2014-06-1314061879-002ND
2014-06-1314061879-003ND
2014-08-09140809/2455-04TND
2014-08-09140809/2455-03T0.513 ppb
2014-08-09140809/2455-02TND
2014-08-09140809/2455-01TND
2014-09-2414092463-001ND
2014-09-2414092463-004ND
2014-09-2414092463-002ND
2014-09-2414092463-003ND
2014-11-10141110/2608-04TND
2014-11-10141110/2608-03T1.32 ppb
2014-11-10141110/2608-02TND
2014-11-10141110/2608-01TND
2014-12-05141205/2656-015.32 ppb
2014-12-05141205/2656-01A5.32 ppb
2014-12-05141205/2656-040.980 ppb
2014-12-05141205/2656-02AND
2014-12-05141205/2656-05AND
2014-12-05141205/2656-02ND
2014-12-05141205/2656-05ND
2014-12-05141205/2656-03A5.89 ppb
2014-12-05141205/2656-04A0.980 ppb
2014-12-05141205/2656-035.89 ppb
2015-02-11150211/2768-04TND
2015-02-11150211/2768-04THND
2015-02-11150211/2768-03T0.500 ppb
2015-02-11150211/2768-03TH0.500 ppb
2015-02-11150211/2768-02TND
2015-02-11150211/2768-02THND
2015-02-11150211/2768-01TND
2015-02-11150211/2768-01THND
2015-03-13150313/2810-01AND
2015-03-13150313/2810-01ND
2015-03-13150313/2810-04AND
2015-03-13150313/2810-04ND
2015-03-13150313/2810-02AND
2015-03-13150313/2810-02ND
2015-03-13150313/2810-03ND
2015-03-13150313/2810-03AND
2015-05-12150512/2926-4TND
2015-05-12150512/2926-3TND
2015-05-12150512/2926-2TND
2015-05-12150512/2926-1TND
2015-05-15150515/2933-1ND
2015-05-15150515/2933-4ND
2015-05-15150515/2933-2ND
2015-05-15150515/2933-3VND
2015-08-13150813/3120-4TND
2015-08-13150813/3120-3TND
2015-08-13150813/3120-2TND
2015-08-13150813/3120-1TND
2015-08-14150814/3122-1ND
2015-08-14150814/3122-4ND
2015-08-14150814/3122-2ND
2015-08-14150814/3122-3ND
2015-11-13151115/3294-4TND
2015-11-13151115/3294-3T0.621 ppb
2015-11-13151115/3294-2TND
2015-11-13151115/3294-1T0.768 ppb
2015-11-13151113/3292-1AND
2015-11-13151113/3292-2AND
2015-11-13151113/3292-5AND
2015-11-13151113/3292-3AND
2015-11-13151113/3292-4AND
2016-02-16160216/3434-4TND
2016-02-16160216/3434-3TND
2016-02-16160216/3434-2TND
2016-02-16160216/3434-1TND
2016-02-29160229/3447-1ND
2016-02-29160229/3447-4ND
2016-02-29160229/3447-21.92 ppb
2016-02-29160229/3447-3ND
2016-05-16160516/3609-4ZND
2016-05-16160516/3609-3Z0.774 ppb
2016-05-16160516/3609-2ZND
2016-05-16160516/3609-1Z0.922 ppb
2016-05-26160526/3624-1ND
2016-05-26160526/3624-4ND
2016-05-26160526/3624-2ND
2016-05-26160526/3624-3ND
2016-08-16160816/3799-4TND
2016-08-16160816/3799-3TND
2016-08-16160816/3799-2TND
2016-08-16160816/3799-1TND
2016-11-15161115/3959-4TND
2016-11-15161115/3959-3TND
2016-11-15161115/3959-2TND
2016-11-15161115/3959-1TND
2017-02-1735088104ND
2017-02-17350881030.500 ppb
2017-02-1735088102ND
2017-02-1735088101ND
2017-05-2236251704ND
2017-05-2236251703ND
2017-05-2236251702ND
2017-05-2236251701ND
2017-06-1236441302ND
2017-06-1236441301ND
2017-06-1236441303ND
2017-06-1236441304ND
2017-06-2636672801ND
2017-06-2636672804ND
2017-06-2636672803ND
2017-08-2537320904ND
2017-08-2537320903ND
2017-08-2537320902ND
2017-08-2537320901ND
2017-09-1537547601ND
2017-09-1537547604ND
2017-09-1537547602ND
2017-09-1537547603ND
2017-11-2438205204ND
2017-11-2438205203ND
2017-11-2438205202ND
2017-11-2438205201ND
2017-11-2738205101ND
2017-11-2738205102ND
2017-11-2738205104ND
2017-12-1138493401ND
2017-12-1138493402ND
2018-02-2839199504ND
2018-02-28391995030.700 ppb
2018-02-28391995020.800 ppb
2018-02-2839199501ND
2018-03-1939403301ND
2018-03-1939403302ND
2018-03-1939403303ND
2018-03-1939403304ND
2018-05-2440150604ND
2018-05-24401506030.600 ppb
2018-05-2440150602ND
2018-05-2440150601ND
2018-05-25401505010.600 ppb
2018-05-2540150502ND
2018-05-2540150505ND
2018-05-25401505030.800 ppb
2018-05-25401505040.700 ppb
2018-06-21404977011.20 ppb
2018-07-1040707701ND
2018-07-1040707702ND
2018-07-1040707705ND
2018-07-1040707703ND
2018-07-1040707704ND
2018-07-2040882301ND
2018-08-2441279904ND
2018-08-24412799030.700 ppb
2018-08-2441279902ND
2018-08-2441279901ND
2018-11-28L7088102-40.400 ppb
2018-11-28L7088102-30.800 ppb
2018-11-28L7088102-20.200 ppb
2018-11-28L7088102-10.800 ppb
2019-02-12P19-0806-04ND
2019-02-12P19-0806-030.610 ppb
2019-02-12P19-0806-02ND
2019-02-12P19-0806-01ND
2019-05-13P19-3358-04ND
2019-05-13P19-3358-03ND
2019-05-13P19-3358-02ND
2019-05-13P19-3358-01ND
2019-06-05390605795AND
2019-06-05390605793AND
2019-06-05390605792AND
2019-06-05390605791AAND
2019-06-05390605794AND
2019-07-03390703736ND
2019-07-03390703739ND
2019-07-03390703740ND
2019-07-03390703738ND
2019-07-03390703737ND
2019-08-07390807765ND
2019-08-07390807768ND
2019-08-07390807769ND
2019-08-073908077673.70 ppb
2019-08-07390807766ND
2019-08-14390814735ND
2019-08-143908147370.900 ppb
2019-08-14390814736ND
2019-08-143908147380.600 ppb
2019-09-04390904797ND
2019-09-04390904800ND
2019-09-04390904801ND
2019-09-04390904799ND
2019-09-04390904798ND
2019-10-02391002729ND
2019-10-02391002732ND
2019-10-02391002733ND
2019-10-02391002731ND
2019-10-02391002730ND
2019-11-07391107826ND
2019-11-07391107829ND
2019-11-07391107830ND
2019-11-07391107828ND
2019-11-07391107827ND
2019-11-13391113750ND
2019-11-133911137510.700 ppb
2019-11-13391113752ND
2019-11-13391113753ND
2019-12-04391204827ND
2019-12-04391204830ND
2019-12-04391204831ND
2019-12-04391204829ND
2019-12-04391204828ND