Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloroform

City of Gainesville

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

 

124

Samples

0

Samples exceeding legal limit (MCL)

54

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0526 ppb191ND - 1.000 ppb
201534.2 ppb2016ND - 100.0 ppb
20167.46 ppb215ND - 52.7 ppb
20174.87 ppb227ND - 23.7 ppb
20188.21 ppb2112ND - 52.0 ppb
201910.3 ppb2113ND - 56.7 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
2014-02-26Q1406422026ND
2014-02-26Q1406422029ND
2014-02-26Q1406422007ND
2014-02-26Q14064220081.000 ppb
2014-02-26Q1406422009ND
2014-02-26Q1406422010ND
2014-04-23Q1413076001ND
2014-04-23Q1413076002ND
2014-04-23Q1413076003ND
2014-04-23Q1413076004ND
2014-07-23Q1430307002ND
2014-07-23Q1430307003ND
2014-07-23Q1430307001ND
2014-07-23Q1430307004ND
2014-09-17Q1445111001ND
2014-10-27Q1454266001ND
2014-10-27Q1454266002ND
2014-10-27Q1454266003ND
2014-10-27Q1454266004ND
2015-03-30Q151175100511.1 ppb
2015-03-30Q15117510062.20 ppb
2015-03-30Q1511751007ND
2015-03-30Q1511751008ND
2015-06-16Q1522784012ND
2015-06-16Q15227840091.27 ppb
2015-06-16Q1522784011ND
2015-06-16Q152278400450.5 ppb
2015-06-16Q152278400510.7 ppb
2015-06-16Q152278400654.4 ppb
2015-06-16Q152278400750.8 ppb
2015-09-23Q153744400161.8 ppb
2015-09-23Q153744400389.4 ppb
2015-09-23Q153744400410.3 ppb
2015-09-23Q1537444005100.0 ppb
2015-09-23Q153744400675.0 ppb
2015-12-09Q154895100146.1 ppb
2015-12-09Q15489510023.89 ppb
2015-12-09Q154895100357.4 ppb
2015-12-09Q154895100459.5 ppb
2016-01-14Q1601618014ND
2016-01-14Q16016180175.91 ppb
2016-01-14Q1601618012ND
2016-01-14Q160161802141.8 ppb
2016-01-14Q16016180229.26 ppb
2016-01-14Q160161802347.0 ppb
2016-01-14Q160161802452.7 ppb
2016-05-03Q1617287008ND
2016-05-03Q1617287003ND
2016-05-03Q1617287004ND
2016-05-03Q1617287005ND
2016-05-03Q1617287006ND
2016-09-29Q1641217001ND
2016-09-29Q1641217003ND
2016-09-29Q1641217004ND
2016-09-29Q1641217005ND
2016-09-29Q1641217006ND
2016-11-15Q1649600003ND
2016-11-15Q1649600001ND
2016-11-15Q1649600004ND
2016-11-15Q1649600002ND
2017-02-13Q1706172016ND
2017-02-13Q1706172017ND
2017-02-13Q1706172042ND
2017-02-13Q1706172020ND
2017-02-13Q1706172013ND
2017-02-13Q1706172010ND
2017-02-13Q1706172036ND
2017-03-16Q1711658003ND
2017-03-16Q1711658001ND
2017-05-02Q1718507001ND
2017-05-02Q1718507002ND
2017-05-02Q1718507003ND
2017-05-02Q1718507004ND
2017-07-24Q173062900121.8 ppb
2017-07-24Q17306290022.90 ppb
2017-07-24Q173062900321.5 ppb
2017-07-24Q173062900417.5 ppb
2017-09-06Q1741728002ND
2017-11-06Q175716100218.1 ppb
2017-11-06Q17571610011.58 ppb
2017-11-06Q175716100323.7 ppb
2017-11-06Q1757161004ND
2018-01-31Q1804068012ND
2018-01-31Q18040680111.52 ppb
2018-01-31Q1804068001ND
2018-01-31Q18040680199.57 ppb
2018-01-31Q1804068008ND
2018-01-31Q1804068020ND
2018-03-13Q1810190002ND
2018-05-03Q18180510066.99 ppb
2018-05-03Q181805100113.9 ppb
2018-05-03Q18180510021.96 ppb
2018-05-03Q1818051003ND
2018-05-03Q1818051004ND
2018-08-20Q183338500412.8 ppb
2018-08-20Q183338500114.7 ppb
2018-08-20Q1833385005ND
2018-08-20Q18333850029.59 ppb
2018-08-20Q18333850066.17 ppb
2018-11-14Q184611300435.1 ppb
2018-11-14Q18461130038.03 ppb
2018-11-14Q184611300252.0 ppb
2018-11-14Q1846113001ND
2019-02-26Q190840902411.6 ppb
2019-02-26Q19084090022.79 ppb
2019-02-26Q1908409004ND
2019-02-26Q190840901818.4 ppb
2019-02-26Q19084090194.09 ppb
2019-02-26Q1908409020ND
2019-02-26Q1908409021ND
2019-06-19Q1939089001ND
2019-06-19Q193908900932.5 ppb
2019-06-19Q19390890101.99 ppb
2019-06-19Q193908901117.0 ppb
2019-06-19Q1939089012ND
2019-09-03Q196186600125.6 ppb
2019-09-03Q196186600356.7 ppb
2019-09-03Q1961866004ND
2019-09-03Q1961866005ND
2019-09-03Q1961866006ND
2019-11-21Q197779200115.9 ppb
2019-11-21Q19777920021.61 ppb
2019-11-21Q197779200317.2 ppb
2019-11-21Q197779200411.0 ppb