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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Chatham Co-North

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

105

Samples

0

Samples exceeding legal limit (MCL)

48

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.07 ppb168ND - 2.57 ppb
20150.994 ppb2111ND - 3.63 ppb
20160.773 ppb207ND - 3.81 ppb
20170.715 ppb167ND - 2.20 ppb
20182.80 ppb168ND - 8.50 ppb
20191.53 ppb167ND - 6.07 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-03-1737729_14-082942.40 ppb
2014-03-1737729_14-082962.57 ppb
2014-03-1737729_14-082972.34 ppb
2014-03-1837729_14-082952.42 ppb
2014-06-1637729_14-179551.000 ppb
2014-06-1637729_14-17956ND
2014-06-1637729_14-17958ND
2014-06-1737729_14-17957ND
2014-09-1637729_14-28450ND
2014-09-1637729_14-28452ND
2014-09-1637729_14-284532.00 ppb
2014-09-1637729_14-284542.00 ppb
2014-12-1537729_14-382602.34 ppb
2014-12-1537729_14-38252ND
2014-12-1537729_14-38258ND
2014-12-1537729_14-38259ND
2015-03-10ND
2015-03-101.000 ppb
2015-03-10ND
2015-03-101.000 ppb
2015-06-16ND
2015-06-161.000 ppb
2015-06-16ND
2015-06-161.000 ppb
2015-06-16ND
2015-06-161.000 ppb
2015-06-16ND
2015-06-161.000 ppb
2015-09-153.11 ppb
2015-09-153.63 ppb
2015-09-153.06 ppb
2015-09-152.00 ppb
2015-09-153.08 ppb
2015-12-14ND
2015-12-14ND
2015-12-14ND
2015-12-14ND
2016-03-1537729_16-08662ND
2016-03-1537729_16-08663ND
2016-03-1537729_16-08664ND
2016-03-1537729_16-08665ND
2016-06-1437729_16-193441.14 ppb
2016-06-1437729_16-193391.19 ppb
2016-06-1437729_16-193421.11 ppb
2016-06-1437729_16-193431.12 ppb
2016-09-2037729_16-329463.37 ppb
2016-09-2037729_16-32946AND
2016-09-2037729_16-329513.81 ppb
2016-09-2037729_16-32951AND
2016-09-2037729_16-329523.72 ppb
2016-09-2037729_16-32952AND
2016-09-2037729_16-32953ND
2016-09-2037729_16-32953AND
2016-12-1237729_16-43431ND
2016-12-1337729_16-43432ND
2016-12-1337729_16-43437ND
2016-12-1337729_16-43438ND
2017-03-0737729_17-078541.42 ppb
2017-03-0737729_17-078551.59 ppb
2017-03-0737729_17-078561.45 ppb
2017-03-0737729_17-078571.64 ppb
2017-06-1337729_17-20081ND
2017-06-1337729_17-20082ND
2017-06-1337729_17-20083ND
2017-06-1337729_17-20084ND
2017-09-1137729_17-33477ND
2017-09-1137729_17-33484ND
2017-09-1137729_17-33486ND
2017-09-1137729_17-33487ND
2017-12-1937729_17-486111.74 ppb
2017-12-1937729_17-48612ND
2017-12-1937729_17-486132.20 ppb
2017-12-1937729_17-486141.40 ppb
2018-03-1337729_18-09942 5.26 ppb
2018-03-1337729_18-09947 8.50 ppb
2018-03-1337729_18-09998 6.89 ppb
2018-03-1337729_18-10018 8.17 ppb
2018-06-1137729_18-23714 ND
2018-06-1137729_18-23716 ND
2018-06-1137729_18-23717 ND
2018-06-1137729_18-23718 ND
2018-09-1137729_18-38564 4.00 ppb
2018-09-1137729_18-38565 4.00 ppb
2018-09-1137729_18-38566 4.00 ppb
2018-09-1137729_18-38567 4.00 ppb
2018-12-1737729_18-52905 ND
2018-12-1737729_18-52911 ND
2018-12-1837729_18-52910 ND
2018-12-1837729_18-52912 ND
2019-03-0437729_19-09283 ND
2019-03-0437729_19-09290 ND
2019-03-0437729_19-09291 ND
2019-03-0437729_19-09292 ND
2019-06-1137729_19-23946 ND
2019-06-1137729_19-23947 ND
2019-06-1137729_19-23948 ND
2019-06-1137729_19-23949 ND
2019-09-1037729_19-38961 1.08 ppb
2019-09-1037729_19-38969 1.23 ppb
2019-09-1037729_19-38970 1.48 ppb
2019-09-1037729_19-38971 ND
2019-12-0937729_19-52590 6.07 ppb
2019-12-0937729_19-52592 4.99 ppb
2019-12-0937729_19-52593 4.26 ppb
2019-12-0937729_19-52594 5.31 ppb