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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Town of Tonawanda 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

 

109

Samples

0

Samples exceeding legal limit (MCL)

109

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201415.3 ppb28285.81 ppb - 35.6 ppb
201513.2 ppb16166.81 ppb - 20.7 ppb
201614.4 ppb16167.08 ppb - 24.1 ppb
201715.9 ppb16167.72 ppb - 27.5 ppb
201816.3 ppb17177.92 ppb - 27.8 ppb
201917.9 ppb16168.83 ppb - 31.7 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
2014-01-08140109216 DBP 1S9.28 ppb
2014-01-08140109213 DBP 1S9.94 ppb
2014-01-08140109212 DBP 1S10.1 ppb
2014-01-08140109218 DBP 1S9.84 ppb
2014-01-0814109217 DBP 1ST9.41 ppb
2014-01-08140109214 DBP 1S7.35 ppb
2014-01-08140109215 DBP 1S5.83 ppb
2014-01-08140109211 DBP1ST5.81 ppb
2014-04-11DBP 2ND Q 14 STA8.60 ppb
2014-04-112ND Q 14STAGE2DB6.49 ppb
2014-04-11STAGE 2 DBP 2NDQ6.46 ppb
2014-04-11LRAA7 2ND Q 14 D9.46 ppb
2014-04-11DBP 2ND Q 14 STA6.90 ppb
2014-04-11STAGE 2DBP 2ND Q9.00 ppb
2014-04-11LRAA8 2ND Q 14 D8.41 ppb
2014-04-11DBP2ND Q 14 STAG9.03 ppb
2014-07-09S4G11068 3RD Q 129.5 ppb
2014-07-09S4G11062 3RD Q 135.6 ppb
2014-07-09S4G11064 3RD Q 129.9 ppb
2014-07-09S4G11066 3RD Q 130.0 ppb
2014-07-09S4G11067 3RD Q 127.3 ppb
2014-07-09S4G11065 3RD Q 123.1 ppb
2014-07-09S4G1106 3RD Q 1421.2 ppb
2014-07-09S4G11063 3RD Q 130.9 ppb
2014-10-084 Q 14 DBP SIT E16.5 ppb
2014-10-084 Q 14 DBP SITE18.6 ppb
2014-10-084 Q 2014 DBP SIT16.0 ppb
2014-10-084 Q 14 DBP SITE18.5 ppb
2015-01-07107152 1ST Q 157.48 ppb
2015-01-07010715 1 DBP 1ST7.91 ppb
2015-01-070107154 1ST Q 157.90 ppb
2015-01-070107152 1ST Q 158.32 ppb
2015-04-084/8/15-27.51 ppb
2015-04-084/8/15-36.81 ppb
2015-04-084/8/15-19.64 ppb
2015-04-084/8/15-47.25 ppb
2015-07-08070815 -118.9 ppb
2015-07-0807/08/15 -220.1 ppb
2015-07-0807/08/15 -417.3 ppb
2015-07-0807/08/15 -320.3 ppb
2015-10-092 4TH Q 15 DBPS18.6 ppb
2015-10-094TH Q 2015 DBPS15.7 ppb
2015-10-093 4TH Q 2015 DBP20.7 ppb
2015-10-094 15 4TH Q DBPS17.5 ppb
2016-01-050105163 DBP7.74 ppb
2016-01-050105164 DBP8.88 ppb
2016-01-0515161 DBP 167.08 ppb
2016-01-050105162 DBP7.41 ppb
2016-04-0504/05/2016-42648.92 ppb
2016-04-0504/05/2016-266010.1 ppb
2016-04-0504/05/2016-849.49 ppb
2016-04-0504/05/2016-29749.33 ppb
2016-07-0507/05/2016-8418.6 ppb
2016-07-0507/05/2016-266019.1 ppb
2016-07-0507/05/2016-426417.9 ppb
2016-07-0507/05/2016-297416.6 ppb
2016-10-0410/04/2016-0319.5 ppb
2016-10-0410/04/2016-0423.4 ppb
2016-10-0410/04/2016-0222.8 ppb
2016-10-0410/04/2016-0124.1 ppb
2017-01-0301/03/2017-018.30 ppb
2017-01-0301/03/2017-049.19 ppb
2017-01-0301/03/2017-028.96 ppb
2017-01-0301/03/2017-037.72 ppb
2017-04-0404201791813.1 ppb
2017-04-04042017100110.1 ppb
2017-04-04042014094310.7 ppb
2017-04-0404178219.94 ppb
2017-07-05752017111518.5 ppb
2017-07-05752017111419.5 ppb
2017-07-05752017111321.4 ppb
2017-07-05752017111220.8 ppb
2017-10-03TOT OCT 2017 DBP27.5 ppb
2017-10-03TOTOCT 2017 DBP22.4 ppb
2017-10-03TOT OCT 2017 DBP25.4 ppb
2017-10-03TOT OCT2017 121.8 ppb
2018-01-0910918 84 HAWTHOR12.9 ppb
2018-01-090109181 1ST Q DB8.96 ppb
2018-01-0910918 DBP9 26608.74 ppb
2018-01-0910918 2974 COLVI7.92 ppb
2018-01-0910918 4264 DELAW8.96 ppb
2018-04-034318 2974 COLVIN9.15 ppb
2018-04-034318 4264 DELAWA10.6 ppb
2018-04-034318 2660 NFB DB10.3 ppb
2018-04-034318 84 HAWTHORN13.9 ppb
2018-07-03DBP 3RD Q 18 26619.6 ppb
2018-07-033RD Q 2018 DBP 827.1 ppb
2018-07-03DBP 3RD Q 18 29723.5 ppb
2018-07-03DBP 3RD Q 18 42620.9 ppb
2018-10-09TONA 1 DBP 4TH Q22.5 ppb
2018-10-09TONA 2 DBP 4TH Q22.4 ppb
2018-10-09TONA 4 DBP 4TH Q27.8 ppb
2018-10-09TONA 3 DBP 4TH Q21.3 ppb
2019-01-074264 DEL10.3 ppb
2019-01-0784 HAW11.3 ppb
2019-01-072660 NIAFALLBLVD10.7 ppb
2019-01-102974 COL8.83 ppb
2019-04-092660 NFBLVD11.5 ppb
2019-04-094264 DELAWARE11.9 ppb
2019-04-092974 COLVIN10.1 ppb
2019-04-0984 HAWTHORNE13.7 ppb
2019-07-094264 DELAWARE 3Q24.6 ppb
2019-07-092660 NIA FALL 3Q27.1 ppb
2019-07-0984 HAWTHORNE 3QT31.7 ppb
2019-07-092974 COLVIN 3RD25.1 ppb
2019-10-084264 DEL 4QTR19.7 ppb
2019-10-082660 NIA FALLS 422.8 ppb
2019-10-0884 HAW 4QTR25.3 ppb
2019-10-082974 COLVIN 4QTR22.3 ppb