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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Brunswick County Water System

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

190

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201412.0 ppb3231ND - 22.0 ppb
201510.0 ppb32321.03 ppb - 22.4 ppb
20168.35 ppb32323.00 ppb - 13.8 ppb
20176.70 ppb3231ND - 13.1 ppb
20189.78 ppb32322.92 ppb - 24.3 ppb
201915.7 ppb32327.28 ppb - 33.6 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
2014-03-0737729_14-06596ND
2014-03-0737729_14-065971.34 ppb
2014-03-0737729_14-065992.56 ppb
2014-03-0737729_14-066004.14 ppb
2014-03-0737729_14-066015.13 ppb
2014-03-0737729_14-066023.42 ppb
2014-03-0737729_14-066038.75 ppb
2014-03-0737729_14-066041.41 ppb
2014-06-0637729_14-1618415.0 ppb
2014-06-0637729_14-1618513.0 ppb
2014-06-0637729_14-1618614.0 ppb
2014-06-0637729_14-1618721.0 ppb
2014-06-0637729_14-1618822.0 ppb
2014-06-0637729_14-1618920.0 ppb
2014-06-0637729_14-1619022.0 ppb
2014-06-0637729_14-1619121.0 ppb
2014-09-0537729_14-269624.00 ppb
2014-09-0537729_14-269633.00 ppb
2014-09-0537729_14-269646.00 ppb
2014-09-0537729_14-2696522.0 ppb
2014-09-0537729_14-2696621.0 ppb
2014-09-0537729_14-2696711.0 ppb
2014-09-0537729_14-2696811.0 ppb
2014-09-0537729_14-2696913.0 ppb
2014-12-0537729_14-3700712.9 ppb
2014-12-0537729_14-3700919.0 ppb
2014-12-0537729_14-3701014.6 ppb
2014-12-0537729_14-3701114.7 ppb
2014-12-0537729_14-3701216.1 ppb
2014-12-0537729_14-3701315.2 ppb
2014-12-0537729_14-3701413.9 ppb
2014-12-0537729_14-3701813.2 ppb
2015-03-067.00 ppb
2015-03-064.00 ppb
2015-03-066.00 ppb
2015-03-069.00 ppb
2015-03-065.00 ppb
2015-03-069.00 ppb
2015-03-066.00 ppb
2015-03-062.00 ppb
2015-06-0410.9 ppb
2015-06-0411.0 ppb
2015-06-0411.9 ppb
2015-06-0411.6 ppb
2015-06-0413.3 ppb
2015-06-0412.7 ppb
2015-06-0413.3 ppb
2015-06-0410.1 ppb
2015-09-282.36 ppb
2015-09-281.03 ppb
2015-09-283.02 ppb
2015-09-2810.7 ppb
2015-09-2813.0 ppb
2015-09-288.34 ppb
2015-09-284.29 ppb
2015-09-2810.4 ppb
2015-12-0411.6 ppb
2015-12-047.12 ppb
2015-12-0415.4 ppb
2015-12-0422.4 ppb
2015-12-0419.0 ppb
2015-12-0417.0 ppb
2015-12-0415.6 ppb
2015-12-0417.1 ppb
2016-03-1137729_16-079793.00 ppb
2016-03-1137729_16-079933.00 ppb
2016-03-1137729_16-079944.00 ppb
2016-03-1137729_16-0799512.0 ppb
2016-03-1137729_16-079968.00 ppb
2016-03-1137729_16-079977.00 ppb
2016-03-1137729_16-079985.00 ppb
2016-03-1137729_16-079998.00 ppb
2016-06-1037729_16-186488.11 ppb
2016-06-1037729_16-1864910.1 ppb
2016-06-1037729_16-1865010.1 ppb
2016-06-1037729_16-1865111.0 ppb
2016-06-1037729_16-1865211.2 ppb
2016-06-1037729_16-186539.15 ppb
2016-06-1037729_16-186548.97 ppb
2016-06-1037729_16-186588.31 ppb
2016-09-0237729_16-306595.60 ppb
2016-09-0237729_16-306604.98 ppb
2016-09-0237729_16-306617.60 ppb
2016-09-0237729_16-306629.85 ppb
2016-09-0237729_16-306639.65 ppb
2016-09-0237729_16-306649.52 ppb
2016-09-0237729_16-306658.66 ppb
2016-09-0237729_16-306669.07 ppb
2016-12-2237729_16-445765.66 ppb
2016-12-2237729_16-4457813.0 ppb
2016-12-2237729_16-445793.11 ppb
2016-12-2237729_16-445809.22 ppb
2016-12-2237729_16-4458112.1 ppb
2016-12-2237729_16-445829.51 ppb
2016-12-2237729_16-4458313.8 ppb
2016-12-2237729_16-445848.80 ppb
2017-03-1037729_17-082206.66 ppb
2017-03-1037729_17-082216.99 ppb
2017-03-1037729_17-082226.79 ppb
2017-03-1037729_17-0822311.7 ppb
2017-03-1037729_17-0822411.9 ppb
2017-03-1037729_17-082258.01 ppb
2017-03-1037729_17-082268.19 ppb
2017-03-1037729_17-082279.85 ppb
2017-06-0737729_17-190958.94 ppb
2017-06-0737729_17-190967.60 ppb
2017-06-0737729_17-190977.38 ppb
2017-06-0737729_17-1909813.1 ppb
2017-06-0737729_17-1909910.8 ppb
2017-06-0737729_17-191008.18 ppb
2017-06-0737729_17-191017.25 ppb
2017-06-0737729_17-191028.25 ppb
2017-09-1837729_17-346248.12 ppb
2017-09-1837729_17-346254.72 ppb
2017-09-1837729_17-346269.76 ppb
2017-09-1837729_17-346279.11 ppb
2017-09-1837729_17-346285.13 ppb
2017-09-1837729_17-3462910.2 ppb
2017-09-1837729_17-3463010.6 ppb
2017-09-1837729_17-346314.70 ppb
2017-12-0437729_17-45594ND
2017-12-0437729_17-456221.09 ppb
2017-12-0437729_17-456231.25 ppb
2017-12-0437729_17-456241.74 ppb
2017-12-0437729_17-456251.69 ppb
2017-12-0437729_17-456261.67 ppb
2017-12-0437729_17-456272.04 ppb
2017-12-0437729_17-456291.07 ppb
2018-03-0837729_18-08917 3.45 ppb
2018-03-0837729_18-08918 2.92 ppb
2018-03-0837729_18-08919 3.50 ppb
2018-03-0837729_18-08920 3.60 ppb
2018-03-0837729_18-08921 4.01 ppb
2018-03-0837729_18-08922 3.10 ppb
2018-03-0837729_18-08923 3.89 ppb
2018-03-0837729_18-08924 4.79 ppb
2018-06-2137729_18-25058 9.12 ppb
2018-06-2137729_18-25063 6.61 ppb
2018-06-2137729_18-25064 7.66 ppb
2018-06-2137729_18-25065 15.5 ppb
2018-06-2137729_18-25066 9.03 ppb
2018-06-2137729_18-25067 8.86 ppb
2018-06-2137729_18-25068 13.0 ppb
2018-06-2137729_18-25069 10.3 ppb
2018-09-1037729_18-38014 16.2 ppb
2018-09-1037729_18-38015 13.2 ppb
2018-09-1037729_18-38016 15.6 ppb
2018-09-1037729_18-38017 21.6 ppb
2018-09-1037729_18-38018 24.3 ppb
2018-09-1037729_18-38019 20.0 ppb
2018-09-1037729_18-38020 18.3 ppb
2018-09-1037729_18-38021 21.1 ppb
2018-12-0337729_18-50400 3.81 ppb
2018-12-0337729_18-50401 6.54 ppb
2018-12-0337729_18-50402 6.94 ppb
2018-12-0337729_18-50403 8.58 ppb
2018-12-0337729_18-50404 6.21 ppb
2018-12-0337729_18-50405 10.2 ppb
2018-12-0337729_18-50407 5.13 ppb
2018-12-0337729_18-50411 5.88 ppb
2019-03-0837729_19-09882 8.93 ppb
2019-03-0837729_19-09883 12.9 ppb
2019-03-0837729_19-09884 8.42 ppb
2019-03-0837729_19-09885 14.0 ppb
2019-03-0837729_19-09886 11.4 ppb
2019-03-0837729_19-09887 9.38 ppb
2019-03-0837729_19-09889 13.1 ppb
2019-03-0837729_19-A 8.51 ppb
2019-06-0637729_19-23182 12.8 ppb
2019-06-0637729_19-23183 12.3 ppb
2019-06-0637729_19-23184 12.8 ppb
2019-06-0637729_19-23185 19.5 ppb
2019-06-0637729_19-23186 15.8 ppb
2019-06-0637729_19-23187 16.3 ppb
2019-06-0637729_19-23188 15.6 ppb
2019-06-0637729_19-23189 16.8 ppb
2019-09-2537729_19-41660 23.3 ppb
2019-09-2537729_19-41661 12.2 ppb
2019-09-2537729_19-41662 22.3 ppb
2019-09-2537729_19-41663 33.6 ppb
2019-09-2537729_19-41664 27.7 ppb
2019-09-2537729_19-41665 28.0 ppb
2019-09-2537729_19-41666 27.6 ppb
2019-09-2537729_19-41667A 25.9 ppb
2019-12-1637729_19-53468 8.59 ppb
2019-12-1637729_19-53469 7.28 ppb
2019-12-1637729_19-53470 9.96 ppb
2019-12-1637729_19-53471 18.6 ppb
2019-12-1637729_19-53472 14.9 ppb
2019-12-1637729_19-53473 12.8 ppb
2019-12-1637729_19-53474 9.61 ppb
2019-12-1637729_19-53475 11.2 ppb