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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

White Plains City

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

 

190

Samples

0

Samples exceeding legal limit (MCL)

190

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201425.7 ppb323211.8 ppb - 39.0 ppb
201523.2 ppb313117.0 ppb - 31.0 ppb
201626.6 ppb323218.0 ppb - 36.0 ppb
201722.2 ppb323215.0 ppb - 30.0 ppb
201828.4 ppb323218.0 ppb - 45.0 ppb
201930.6 ppb313122.0 ppb - 45.0 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
2014-01-161401822-003DBP18.5 ppb
2014-01-161401822-001DBP12.7 ppb
2014-01-161401822-002DBP11.8 ppb
2014-01-161401822-005DBP31.5 ppb
2014-01-161401822-007DBP23.9 ppb
2014-01-161401822-006DBP20.5 ppb
2014-01-161401822-008DBP21.5 ppb
2014-01-161401822-004DBP19.9 ppb
2014-04-1520140416886DBP24.0 ppb
2014-04-15201404160881DBP29.0 ppb
2014-04-15201404160883DBP26.0 ppb
2014-04-1520140416887DBP27.0 ppb
2014-04-15201404160882DBP27.0 ppb
2014-04-15201404160885DBP33.0 ppb
2014-04-1520140416888DBP29.0 ppb
2014-04-15201404160884DBP27.0 ppb
2014-07-17201407220320DBP17.0 ppb
2014-07-17201407220321DBP26.0 ppb
2014-07-17201407220319DBP19.0 ppb
2014-07-17201407220326DBP29.0 ppb
2014-07-17201407330324DBP26.0 ppb
2014-07-17201407220322DBP23.0 ppb
2014-07-17201407220325DBP31.0 ppb
2014-07-1720140722323DBP27.0 ppb
2014-10-16201410170209 DBP28.0 ppb
2014-10-16201410170207 DBP30.0 ppb
2014-10-16201410170210 DBP32.0 ppb
2014-10-16201410170205 DBP24.0 ppb
2014-10-16201410170204 DBP26.0 ppb
2014-10-16201410170208 DBP39.0 ppb
2014-10-16201410170211 DBP29.0 ppb
2014-10-16201410170206 DBP33.0 ppb
2015-01-15201501160214 DBP18.0 ppb
2015-01-15201501160215 DBP31.0 ppb
2015-01-15201501160219 DBP22.0 ppb
2015-01-15201501160218 DBP22.0 ppb
2015-01-15201501160213 DBP22.0 ppb
2015-01-15201501160216 DBP22.0 ppb
2015-01-15201501160217 DBP24.0 ppb
2015-01-15201501160220 DBP23.0 ppb
2015-04-16DBP 526.0 ppb
2015-04-16DBP 424.0 ppb
2015-04-16DBP 624.0 ppb
2015-04-16DBP 218.0 ppb
2015-04-16DBP 127.0 ppb
2015-04-16DBP 325.0 ppb
2015-04-16DBP 821.0 ppb
2015-04-16DBP 726.0 ppb
2015-07-16201505160085 DBP27.0 ppb
2015-07-16201505160084 DBP30.0 ppb
2015-07-16201505160078 DBP21.0 ppb
2015-07-16201505160082 DBP25.0 ppb
2015-07-16201505160080 DBP23.0 ppb
2015-07-16201505160079 DBP18.0 ppb
2015-07-16201502160083 DBP24.0 ppb
2015-10-15201508160046 DBP26.0 ppb
2015-10-15201508160040 DBP17.0 ppb
2015-10-15201508160043 DBP25.0 ppb
2015-10-15201506160039 DBP18.0 ppb
2015-10-15201508160044 DBP21.0 ppb
2015-10-15201508160042 DBP23.0 ppb
2015-10-15201508160045 DBP23.0 ppb
2015-10-15201508160041 DBP23.0 ppb
2016-01-14201511150043 DBP24.0 ppb
2016-01-14201511150044 DBP23.0 ppb
2016-01-14201511150040 DBP18.0 ppb
2016-01-14201511150046 DBP25.0 ppb
2016-01-14201511150042 DBP24.0 ppb
2016-01-1420151115003918.0 ppb
2016-01-14201511150041 DBP25.0 ppb
2016-01-14201511150045 DBP29.0 ppb
2016-04-14201602140036 DBP26.0 ppb
2016-04-14201602140037 DBP25.0 ppb
2016-04-14201602140040 DBP30.0 ppb
2016-04-14201602140041 DBP25.0 ppb
2016-04-14201602140039 DBP25.0 ppb
2016-04-14201602140034 DBP19.0 ppb
2016-04-14201602140035 DBP20.0 ppb
2016-04-14201602140038 DBP27.0 ppb
2016-07-14201605160041 DBP28.0 ppb
2016-07-14201605160038 DBP29.0 ppb
2016-07-14201605160037 DBP27.0 ppb
2016-07-14201605160039 DBP32.0 ppb
2016-07-14201605160042 DBP36.0 ppb
2016-07-14201605160036 DBP20.0 ppb
2016-07-14201605160040 DBP31.0 ppb
2016-07-14201605160035 DBP23.0 ppb
2016-10-13201610140271 DBP26.0 ppb
2016-10-13201610140273 DBP26.0 ppb
2016-10-13201610140277 DBP32.0 ppb
2016-10-13201610140275 DBP34.0 ppb
2016-10-13201610140272 DBP24.0 ppb
2016-10-13201610140274 DBP32.0 ppb
2016-10-13201610140278 DBP36.0 ppb
2016-10-13201610140276 DBP33.0 ppb
2017-01-12201701130570 DBP16.0 ppb
2017-01-12201701130573 DBP26.0 ppb
2017-01-12201701130575 DBP28.0 ppb
2017-01-12201701130574 DBP23.0 ppb
2017-01-12201401130571 DBP21.0 ppb
2017-01-12201701130572 DBP22.0 ppb
2017-01-12201701130576 DBP26.0 ppb
2017-01-1220101130569 DBP15.0 ppb
2017-04-13201704140311-DBP18.0 ppb
2017-04-13201704140316-DBP24.0 ppb
2017-04-13201704140312-DBP18.0 ppb
2017-04-13201704140314-DBP26.0 ppb
2017-04-13201704140315-DBP25.0 ppb
2017-04-13201704140313-DBP26.0 ppb
2017-04-13201704140318-DBP25.0 ppb
2017-04-13201704140317-DBP25.0 ppb
2017-07-20201705160226-DBP21.0 ppb
2017-07-20201705160222-DBP27.0 ppb
2017-07-20201705160221-DBP18.0 ppb
2017-07-20201705160223-DBP21.0 ppb
2017-07-20201705160220-DBP17.0 ppb
2017-07-20201705160224-DBP18.0 ppb
2017-07-20201705160225-DBP25.0 ppb
2017-07-20201705160219-DBP19.0 ppb
2017-10-19201708160154-DBP23.0 ppb
2017-10-19201708160151-DBP20.0 ppb
2017-10-19201708160157-DBP23.0 ppb
2017-10-19201708160152-DBP19.0 ppb
2017-10-19201708160153-DBP24.0 ppb
2017-10-19201708160155-DBP30.0 ppb
2017-10-19201708160158-DBP23.0 ppb
2017-10-19201708160156-DBP19.0 ppb
2018-01-18201801190613-DBP23.0 ppb
2018-01-18201801190611-DBP18.0 ppb
2018-01-18201801190616-DBP22.0 ppb
2018-01-18201801190614-DBP22.0 ppb
2018-01-18201801190612-DBP19.0 ppb
2018-01-18201801190617-DBP23.0 ppb
2018-01-18201801190615-DBP24.0 ppb
2018-01-18201801190618-DBP23.0 ppb
2018-04-17201802130182-DBP37.0 ppb
2018-04-17201802130180-DBP31.0 ppb
2018-04-17201802130176-DBP23.0 ppb
2018-04-17201802130175-DBP23.0 ppb
2018-04-17201802130178-DBP32.0 ppb
2018-04-17201802130177-DBP31.0 ppb
2018-04-17201802130179-DBP35.0 ppb
2018-04-17201802130181-DBP37.0 ppb
2018-07-17201805160175-DBP29.0 ppb
2018-07-17201805160173-DBP27.0 ppb
2018-07-17201805160177-DBP30.0 ppb
2018-07-17201805160174-DBP21.0 ppb
2018-07-17201805160178-DBP30.0 ppb
2018-07-17201805160176-DBP35.0 ppb
2018-07-17201805160179-DBP32.0 ppb
2018-07-17201805160172-DBP23.0 ppb
2018-10-19201810170159-DBP34.0 ppb
2018-10-19201810170154-DBP37.0 ppb
2018-10-19201810170158-DBP32.0 ppb
2018-10-19201810170157-DBP34.0 ppb
2018-10-19201810170152-DBP23.0 ppb
2018-10-19201810170155-DBP33.0 ppb
2018-10-19201810170153-DBP22.0 ppb
2018-10-19201810170156-DBP45.0 ppb
2019-01-16201901170544-DBP39.0 ppb
2019-01-16201901170540-DBP37.0 ppb
2019-01-16201901170542-DBP39.0 ppb
2019-01-16201901170538-DBP27.0 ppb
2019-01-16201901170543-DBP38.0 ppb
2019-01-16201901170541-DBP45.0 ppb
2019-01-16201901170539-DBP41.0 ppb
2019-01-16201901170537-DBP25.0 ppb
2019-04-17201904110693-DBP24.0 ppb
2019-04-17201904110697-DBP40.0 ppb
2019-04-17201904110698-DBP32.0 ppb
2019-04-17201904110696-DBP34.0 ppb
2019-04-17201904110694-DBP25.0 ppb
2019-04-17201904110695-DBP38.0 ppb
2019-04-17201904110699-DBP30.0 ppb
2019-04-17201904110700-DBP33.0 ppb
2019-07-17201907180321-DBP24.0 ppb
2019-07-17201907180322-DBP22.0 ppb
2019-07-17201907180328-DBP24.0 ppb
2019-07-17201907180327-DBP28.0 ppb
2019-07-17201907180323-DBP25.0 ppb
2019-07-17201907180325-DBP29.0 ppb
2019-07-17201907180326-DBP26.0 ppb
2019-10-16201910180394-DBP28.0 ppb
2019-10-16201910180396-DBP28.0 ppb
2019-10-16201910180393-DBP29.0 ppb
2019-10-16201910180390-DBP25.0 ppb
2019-10-16201910180392-DBP29.0 ppb
2019-10-16201910180395-DBP27.0 ppb
2019-10-16201910180391-DBP26.0 ppb
2019-10-16201910180397-DBP32.0 ppb