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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Middletown 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

 

116

Samples

0

Samples exceeding legal limit (MCL)

116

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201436.9 ppb26266.60 ppb - 69.4 ppb
201534.0 ppb18185.20 ppb - 56.0 ppb
201636.6 ppb18186.30 ppb - 69.5 ppb
201734.6 ppb181810.8 ppb - 74.0 ppb
201839.4 ppb18185.40 ppb - 73.6 ppb
201940.2 ppb18185.80 ppb - 71.1 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
2014-01-07DBP 20038899624.1 ppb
2014-01-07DBP 20038899719.8 ppb
2014-01-07DBP 20038899836.0 ppb
2014-01-07DBP 20038899926.5 ppb
2014-03-13DBP 20039266528.9 ppb
2014-03-13DBP 20039266627.6 ppb
2014-03-13DBP 20039266739.2 ppb
2014-03-13DBP 20039266831.1 ppb
2014-04-04DBP 20039370233.4 ppb
2014-04-04DBP 20039370328.0 ppb
2014-04-04DBP 20039370440.7 ppb
2014-04-04DBP 20039370532.8 ppb
2014-06-09VOC1 2003974226.60 ppb
2014-06-09VOC1 20039742329.8 ppb
2014-07-03DBP 20039899563.3 ppb
2014-07-03DBP 20039899637.0 ppb
2014-07-03DBP 20039899868.1 ppb
2014-07-03DBP 20039899969.4 ppb
2014-10-02DBP 20040538752.0 ppb
2014-10-02DBP 20040538840.6 ppb
2014-10-02DBP 20040538954.5 ppb
2014-10-02DBP 20040539059.5 ppb
2014-12-11DBP 20040945423.6 ppb
2014-12-11DBP 20040945523.3 ppb
2014-12-11DBP 20040945634.4 ppb
2014-12-11DBP 20040945728.6 ppb
2015-01-08DBP 20041040320.2 ppb
2015-01-08DBP 20041040224.2 ppb
2015-01-08DBP 20041040434.5 ppb
2015-01-08DBP 20041040527.5 ppb
2015-04-02DBP 20041437227.6 ppb
2015-04-02DBP 20041437429.2 ppb
2015-04-02DBP 20041437325.4 ppb
2015-04-02DBP 20041437527.6 ppb
2015-05-28VOC1 20041751320.3 ppb
2015-06-01VOC1 2004176235.20 ppb
2015-07-07DBP 20041966248.7 ppb
2015-07-07DBP 20041965941.3 ppb
2015-07-07DBP 20041966150.5 ppb
2015-07-07DBP 20041966035.4 ppb
2015-10-01DBP 20042593852.2 ppb
2015-10-01DBP 20042594056.0 ppb
2015-10-01DBP 20042593934.8 ppb
2015-10-01DBP 20042594151.7 ppb
2016-01-07DBP 20043158815.8 ppb
2016-01-07DBP 20043158912.6 ppb
2016-01-07DBP 20043159021.1 ppb
2016-01-07DBP 20043159122.8 ppb
2016-04-07DBP 20043684142.9 ppb
2016-04-07DBP 20043684228.1 ppb
2016-04-07DBP 20043684353.1 ppb
2016-04-07DBP 20043684453.1 ppb
2016-06-22VOC1 20044299922.0 ppb
2016-06-29VOC1 2004434246.30 ppb
2016-07-07DBP 20044403360.5 ppb
2016-07-07DBP 20044403444.5 ppb
2016-07-07DBP 20044403558.0 ppb
2016-07-07DBP 20044403669.5 ppb
2016-10-07DBP 20045191630.9 ppb
2016-10-07DBP 20045191726.9 ppb
2016-10-07DBP 20045191850.5 ppb
2016-10-07DBP 20045191939.5 ppb
2017-01-05DBP 20045819010.8 ppb
2017-01-05DBP 20045819111.1 ppb
2017-01-05DBP 20045819219.2 ppb
2017-01-05DBP 20045819314.4 ppb
2017-04-07DBP 20046408820.4 ppb
2017-04-07DBP 20046408921.8 ppb
2017-04-07DBP 20046409027.7 ppb
2017-04-07DBP 20046409125.2 ppb
2017-06-29VOC1 20047075723.3 ppb
2017-07-06DBP 20047128367.0 ppb
2017-07-06DBP 20047128451.6 ppb
2017-07-06DBP 20047128574.0 ppb
2017-07-06DBP 20047128674.0 ppb
2017-09-29VOC1 20047828712.4 ppb
2017-10-05DBP 20047879245.7 ppb
2017-10-05DBP 20047879331.6 ppb
2017-10-05DBP 20047879447.5 ppb
2017-10-05DBP 20047879545.9 ppb
2018-01-05DBP 20048541020.0 ppb
2018-01-05DBP 20048541123.9 ppb
2018-01-05DBP 20048541249.3 ppb
2018-01-05DBP 20048541326.7 ppb
2018-03-28VOC1 20049077015.8 ppb
2018-04-05DBP 20049144629.7 ppb
2018-04-05DBP 20049144727.6 ppb
2018-04-05DBP 20049144830.6 ppb
2018-04-05DBP 20049144928.5 ppb
2018-04-16VOC1 2004921545.40 ppb
2018-07-04DBP 20049863856.5 ppb
2018-07-04DBP 20049863950.0 ppb
2018-07-04DBP 20049864060.5 ppb
2018-07-04DBP 20049864173.6 ppb
2018-10-04DBP 20050804749.2 ppb
2018-10-04DBP 20050804848.1 ppb
2018-10-04DBP 20050804957.5 ppb
2018-10-04DBP 20050805056.2 ppb
2019-01-03DBP 20051750625.1 ppb
2019-01-03DBP 20051750727.6 ppb
2019-01-03DBP 20051750854.2 ppb
2019-01-03DBP 20051750930.3 ppb
2019-04-04DBP 20052718235.9 ppb
2019-04-04DBP 20052718333.5 ppb
2019-04-04DBP 20052718441.9 ppb
2019-04-04DBP 20052718542.7 ppb
2019-05-13VOC1 2005318935.80 ppb
2019-05-21VOC1 20053308330.0 ppb
2019-07-03DBP 20053892271.1 ppb
2019-07-03DBP 20053892350.6 ppb
2019-07-03DBP 20053892467.1 ppb
2019-07-03DBP 20053892569.4 ppb
2019-10-17DBP 20055333326.8 ppb
2019-10-17DBP 20055333535.8 ppb
2019-10-17DBP 20055333736.8 ppb
2019-10-17DBP 20055333938.3 ppb