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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Collingswood Water Depar

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

 

142

Samples

0

Samples exceeding legal limit (MCL)

58

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.15 ppb2416ND - 3.86 ppb
20150.470 ppb2810ND - 4.11 ppb
20161.52 ppb2013ND - 6.44 ppb
20170.322 ppb233ND - 6.20 ppb
20180.308 ppb2410ND - 1.20 ppb
20190.257 ppb237ND - 1.20 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
2014-02-12140212/2159-04T3.86 ppb
2014-02-12140212/2159-03T1.27 ppb
2014-02-12140212/2159-02TND
2014-02-12140212/2159-01T1.16 ppb
2014-03-0714031563-001ND
2014-03-0714031563-002ND
2014-05-13140513/2285-01T2.50 ppb
2014-05-13140513/2285-02T1.26 ppb
2014-05-13140513/2285-03T1.60 ppb
2014-05-13140513/2285-04T2.88 ppb
2014-06-1714061881-002ND
2014-06-1714061881-0010.900 ppb
2014-08-13140813/2464-04TND
2014-08-13140813/2464-03T3.41 ppb
2014-08-13140813/2464-02T1.83 ppb
2014-08-13140813/2464-01T0.518 ppb
2014-09-2414092459-001ND
2014-09-2414092459-0020.800 ppb
2014-11-13141113/2617-04TND
2014-11-13141113/2617-03T0.628 ppb
2014-11-13141113/2617-02T0.980 ppb
2014-11-13141113/2617-01TND
2014-12-03141203/2641-011.78 ppb
2014-12-03141203/2641-022.14 ppb
2015-02-13150213/2769-04TND
2015-02-13150213/2769-03TND
2015-02-13150213/2769-02T0.648 ppb
2015-02-14150213/2769-04H1ND
2015-02-14150213/2769-03H1ND
2015-02-14150213/2769-02H10.648 ppb
2015-02-14150213/2769-01TND
2015-02-14150213/2769-01H1ND
2015-03-12150312/2808-01ND
2015-03-12150312/2808-022.27 ppb
2015-05-14150514/2930-4TND
2015-05-14150514/2930-3TND
2015-05-14150514/2930-2TND
2015-05-14150514/2930-1TND
2015-05-14150514/2931-14.11 ppb
2015-05-14150514/2931-21.34 ppb
2015-08-17150817/3123-4TND
2015-08-17150817/3123-3TND
2015-08-17150817/3123-2TND
2015-08-17150817/3123-1TND
2015-08-17150817/3123-6ND
2015-08-17150817/3123-7ND
2015-11-18151118/3295-4T1.15 ppb
2015-11-18151118/3295-3T0.567 ppb
2015-11-18151118/3295-2T1.06 ppb
2015-11-18151118/3295-1T0.562 ppb
2015-11-18151118/3295-6D0.813 ppb
2015-11-18151118/3295-7DND
2016-02-19160219/3440-4T6.44 ppb
2016-02-19160219/3440-3T4.70 ppb
2016-02-19160219/3440-2T3.21 ppb
2016-02-19160219/3440-1T0.716 ppb
2016-02-19160219/3440-52.25 ppb
2016-02-19160219/3440-60.983 ppb
2016-05-18160518/3620-4TND
2016-05-18160518/3620-3T0.954 ppb
2016-05-18160518/3620-2T0.832 ppb
2016-05-18160518/3620-1T1.50 ppb
2016-05-18160518/3620-52.90 ppb
2016-05-18160518/3620-64.04 ppb
2016-08-18160818/3800-4TND
2016-08-18160818/3800-3TND
2016-08-18160818/3800-2TND
2016-08-18160818/3800-1TND
2016-11-15161115/3958-4T1.33 ppb
2016-11-15161115/3958-3T0.605 ppb
2016-11-15161115/3958-2TND
2016-11-15161115/3958-1TND
2017-02-2135088304ND
2017-02-2135088303ND
2017-02-2135088302ND
2017-02-2135088301ND
2017-05-2236251804ND
2017-05-2236251803ND
2017-05-2236251802ND
2017-05-2236251801ND
2017-06-2636672501ND
2017-06-2636672502ND
2017-06-30L6876932-10.400 ppb
2017-08-2537321004ND
2017-08-2537321003ND
2017-08-25373210026.20 ppb
2017-08-2537321001ND
2017-09-1537547701ND
2017-09-1537547702ND
2017-11-27382054040.800 ppb
2017-11-2738205403ND
2017-11-2738205402ND
2017-11-2738205401ND
2017-11-2738205405ND
2017-11-2738205406ND
2018-02-28391994040.500 ppb
2018-02-2839199403ND
2018-02-2839199402ND
2018-02-2839199401ND
2018-03-2039402101ND
2018-03-2039402102ND
2018-05-2440150704ND
2018-05-24401507030.500 ppb
2018-05-2440150702ND
2018-05-2440150701ND
2018-05-25401504010.800 ppb
2018-05-2540150402ND
2018-07-1040707601ND
2018-07-10407076021.20 ppb
2018-08-2441279704ND
2018-08-2441279703ND
2018-08-24412797021.20 ppb
2018-08-24412797010.700 ppb
2018-11-27L7088101-40.600 ppb
2018-11-27L7088101-30.600 ppb
2018-11-27L7088101-20.800 ppb
2018-11-27L7088101-10.500 ppb
2018-12-28381228702AND
2018-12-28381228703AND
2019-01-16390116767.1ND
2019-01-16390116768.1ND
2019-02-08390208703.1ND
2019-02-08390208705.1ND
2019-02-08390208704.10.900 ppb
2019-02-08390208706.1ND
2019-04-03390403746ND
2019-04-03390403745ND
2019-05-08390509703.1ND
2019-05-08390509700.1ND
2019-05-08390509701.10.700 ppb
2019-05-08390509702.1ND
2019-07-10390711700ND
2019-08-07390807836.10.600 ppb
2019-08-07390807838.10.600 ppb
2019-08-07390807837.10.900 ppb
2019-08-07390807839.11.000 ppb
2019-10-16391016760.1ND
2019-11-20391120793.1ND
2019-11-20391120795.1ND
2019-11-20391120794.11.20 ppb
2019-11-20391120792.1ND
2019-11-20391120796ND