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EWG's Tap Water Database — 2019 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.

 

61

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND30ND
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

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
2013-11-20S505052ND
2013-11-20S505051ND
2013-11-20S536645ND
2014-08-27S5754470.630 ppb
2014-08-27S5754465.97 ppb
2014-08-27S5754425.88 ppb
2014-12-04S5900001.80 ppb
2014-12-04S5899991.33 ppb
2014-12-04S5900010.740 ppb
2014-12-04S59000239.4 ppb
2015-03-31S6146681.84 ppb
2015-03-31S614667ND
2015-03-31S6146660.800 ppb
2015-03-31S61466511.6 ppb
2015-06-30S63716111.0 ppb
2015-06-30S6371587.02 ppb
2015-06-30S6371591.25 ppb
2015-06-30S6371606.18 ppb
2015-09-30S6372823.24 ppb
2015-09-30S637281ND
2015-09-30S6372805.04 ppb
2015-09-30S63727928.0 ppb
2015-12-21S62896610.5 ppb
2015-12-21S6289673.50 ppb
2015-12-21S628968ND
2015-12-21S6289696.18 ppb
2016-03-31S6770795.92 ppb
2016-03-31S677078ND
2016-03-31S6770773.15 ppb
2016-03-31S6770760.770 ppb
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
2016-10-11S719480ND
2016-10-11S719481ND
2016-10-11S719482ND
2016-12-14S7197293.08 ppb
2016-12-14S7197280.800 ppb
2016-12-14S7197271.33 ppb
2016-12-14S7197264.64 ppb
2017-03-30S67206210.690 ppb
2017-03-30S7206206.60 ppb
2017-03-30S720622ND
2017-03-30S7206232.56 ppb
2017-06-28S73858612.4 ppb
2017-06-28S738585ND
2017-06-28S7385843.00 ppb
2017-06-28S7385832.41 ppb
2017-09-27S760209ND
2017-09-27S7602112.72 ppb
2017-09-27S760213ND
2017-09-27S76021510.5 ppb
2017-12-19S7820782.96 ppb
2017-12-19S782076ND
2017-12-19S7820741.26 ppb
2017-12-19S7820728.89 ppb