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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Smyrna 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

 

96

Samples

0

Samples exceeding legal limit (MCL)

66

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20147.96 ppb770.630 ppb - 39.4 ppb
20156.01 ppb1613ND - 28.0 ppb
20162.61 ppb1913ND - 10.00 ppb
20173.37 ppb1611ND - 12.4 ppb
20182.55 ppb1611ND - 10.0 ppb
20191.75 ppb2211ND - 8.98 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
2014-08-27S5754470.630 ppb
2014-08-27S5754465.97 ppb
2014-08-27S5754425.88 ppb
2014-12-04S59000239.4 ppb
2014-12-04S5900010.740 ppb
2014-12-04S5900001.80 ppb
2014-12-04S5899991.33 ppb
2015-03-31S6146681.84 ppb
2015-03-31S614667ND
2015-03-31S6146660.800 ppb
2015-03-31S61466511.6 ppb
2015-06-30S6371606.18 ppb
2015-06-30S6371587.02 ppb
2015-06-30S6371591.25 ppb
2015-06-30S63716111.0 ppb
2015-09-30S6372823.24 ppb
2015-09-30S637281ND
2015-09-30S6372805.04 ppb
2015-09-30S63727928.0 ppb
2015-12-21S6289696.18 ppb
2015-12-21S628968ND
2015-12-21S6289673.50 ppb
2015-12-21S62896610.5 ppb
2016-03-31S6770795.92 ppb
2016-03-31S6770760.770 ppb
2016-03-31S6770773.15 ppb
2016-03-31S677078ND
2016-06-29S67927610.00 ppb
2016-06-29S679275ND
2016-06-29S6792741.92 ppb
2016-06-29S6792732.54 ppb
2016-09-29S6948418.99 ppb
2016-09-29S694840ND
2016-09-29S6948393.91 ppb
2016-09-29S6948382.45 ppb
2016-10-11S719482ND
2016-10-11S719480ND
2016-10-11S719481ND
2016-12-14S7197293.08 ppb
2016-12-14S7197280.800 ppb
2016-12-14S7197271.33 ppb
2016-12-14S7197264.64 ppb
2017-03-30S7206232.56 ppb
2017-03-30S720622ND
2017-03-30S7206206.60 ppb
2017-03-30S67206210.690 ppb
2017-06-28S73858612.4 ppb
2017-06-28S738585ND
2017-06-28S7385843.00 ppb
2017-06-28S7385832.41 ppb
2017-09-27S76021510.5 ppb
2017-09-27S760213ND
2017-09-27S7602112.72 ppb
2017-09-27S760209ND
2017-12-19S7820782.96 ppb
2017-12-19S782076ND
2017-12-19S7820741.26 ppb
2017-12-19S7820728.89 ppb
2018-03-26S7921250.690 ppb
2018-03-26S7921211.80 ppb
2018-03-26S7921231.07 ppb
2018-03-26S7921272.65 ppb
2018-06-26S808446ND
2018-06-26S808444ND
2018-06-26S8084428.49 ppb
2018-06-26S80844010.0 ppb
2018-09-26S8086447.57 ppb
2018-09-26S808642ND
2018-09-26S8086403.80 ppb
2018-09-26S808638ND
2018-12-17S854825ND
2018-12-17S8548211.58 ppb
2018-12-17S8548231.14 ppb
2018-12-17S8548272.01 ppb
2019-03-28S8706013.32 ppb
2019-03-28S870599ND
2019-03-28S8705970.830 ppb
2019-03-28S870595ND
2019-06-27S8931551.13 ppb
2019-06-27S893153ND
2019-06-27S8931514.55 ppb
2019-06-27S8931498.98 ppb
2019-09-30S909293ND
2019-09-30S9092897.79 ppb
2019-09-30S9092915.44 ppb
2019-09-30S9092950.930 ppb
2019-10-10S920196ND
2019-10-10S920194ND
2019-10-10S920192ND
2019-12-09S9275322.71 ppb
2019-12-09S927657ND
2019-12-09S9276561.45 ppb
2019-12-09S927655ND
2019-12-09S927654ND
2019-12-09S927537ND
2019-12-09S9275361.32 ppb