Chloroform
Central Arkansas Water
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 35.3 ppb | 50 | 50 | 6.60 ppb - 85.0 ppb |
2015 | 37.5 ppb | 50 | 50 | 11.5 ppb - 86.3 ppb |
2016 | 37.1 ppb | 50 | 50 | 9.63 ppb - 78.0 ppb |
2017 | 30.7 ppb | 50 | 50 | 8.24 ppb - 63.1 ppb |
2018 | 37.2 ppb | 50 | 50 | 6.56 ppb - 69.8 ppb |
2019 | 37.0 ppb | 50 | 50 | 12.8 ppb - 71.6 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 |
---|---|---|
2014-01-29 | 14030009201 | 6.89 ppb |
2014-02-10 | 14044001802 | 11.2 ppb |
2014-02-10 | 14044001902 | 6.60 ppb |
2014-02-10 | 14044002602 | 21.8 ppb |
2014-02-10 | 14044002002 | 17.7 ppb |
2014-02-10 | 14044002502 | 28.1 ppb |
2014-02-10 | 14044002902 | 24.8 ppb |
2014-02-10 | 14044002302 | 16.2 ppb |
2014-02-10 | 14044002702 | 24.3 ppb |
2014-02-10 | 14044002202 | 21.4 ppb |
2014-02-10 | 14044002802 | 29.6 ppb |
2014-02-10 | 14044002102 | 21.1 ppb |
2014-02-10 | 14044002402 | 21.0 ppb |
2014-05-05 | 14128004802 | 35.5 ppb |
2014-05-05 | 14128004002 | 9.60 ppb |
2014-05-05 | 14128004202 | 33.0 ppb |
2014-05-05 | 14128005002 | 32.5 ppb |
2014-05-05 | 14128004102 | 27.2 ppb |
2014-05-05 | 14128004902 | 31.6 ppb |
2014-05-05 | 14128004502 | 27.3 ppb |
2014-05-05 | 14128004402 | 37.0 ppb |
2014-05-05 | 14128003902 | 23.7 ppb |
2014-05-05 | 14128004702 | 30.8 ppb |
2014-05-05 | 14128004602 | 34.2 ppb |
2014-05-05 | 14128004302 | 38.6 ppb |
2014-07-03 | 14184014401 | 29.4 ppb |
2014-08-04 | 14219006302 | 85.0 ppb |
2014-08-04 | 14219006802 | 47.2 ppb |
2014-08-04 | 14219006202 | 73.2 ppb |
2014-08-04 | 14219006402 | 76.9 ppb |
2014-08-04 | 14219005902 | 40.6 ppb |
2014-08-04 | 14219006602 | 83.5 ppb |
2014-08-04 | 14219006702 | 52.8 ppb |
2014-08-04 | 14219006102 | 53.0 ppb |
2014-08-04 | 14219006502 | 65.7 ppb |
2014-08-04 | 14219006902 | 49.2 ppb |
2014-08-04 | 14219008602 | 49.2 ppb |
2014-08-04 | 14219006002 | 35.7 ppb |
2014-11-03 | 14310006602 | 34.5 ppb |
2014-11-03 | 14310006502 | 55.9 ppb |
2014-11-03 | 14310006902 | 28.4 ppb |
2014-11-03 | 14310006202 | 50.4 ppb |
2014-11-03 | 14310006702 | 30.4 ppb |
2014-11-03 | 14310006802 | 25.4 ppb |
2014-11-03 | 14310006402 | 34.6 ppb |
2014-11-03 | 14310005902 | 18.0 ppb |
2014-11-03 | 14310006302 | 47.1 ppb |
2014-11-03 | 14310005802 | 19.7 ppb |
2014-11-03 | 14310006102 | 38.0 ppb |
2014-11-03 | 14310006002 | 28.5 ppb |
2015-02-02 | 15036001202 | 23.2 ppb |
2015-02-02 | 15036000602 | 16.1 ppb |
2015-02-02 | 15036000802 | 25.9 ppb |
2015-02-02 | 15036000902 | 24.9 ppb |
2015-02-02 | 15036001102 | 20.2 ppb |
2015-02-02 | 15036001302 | 19.5 ppb |
2015-02-02 | 15036000502 | 16.5 ppb |
2015-02-02 | 15036000702 | 18.8 ppb |
2015-02-02 | 15036001502 | 19.4 ppb |
2015-02-02 | 15036001002 | 26.7 ppb |
2015-02-02 | 15036001602 | 18.0 ppb |
2015-02-02 | 15036001402 | 19.9 ppb |
2015-03-10 | 15070000601 | 11.5 ppb |
2015-05-04 | 15127006902 | 36.1 ppb |
2015-05-04 | 15127006402 | 45.9 ppb |
2015-05-04 | 15127006802 | 43.2 ppb |
2015-05-04 | 15127006302 | 44.3 ppb |
2015-05-04 | 15127006202 | 39.2 ppb |
2015-05-04 | 15127006002 | 26.1 ppb |
2015-05-04 | 15127006702 | 53.9 ppb |
2015-05-04 | 15127006502 | 48.6 ppb |
2015-05-04 | 15127007102 | 44.4 ppb |
2015-05-04 | 15127007002 | 34.0 ppb |
2015-05-04 | 15127006602 | 43.8 ppb |
2015-05-04 | 15127006102 | 25.3 ppb |
2015-07-06 | 15190001109 | 31.9 ppb |
2015-08-03 | 15218004902 | 43.5 ppb |
2015-08-03 | 15218003902 | 40.1 ppb |
2015-08-03 | 15218004302 | 77.9 ppb |
2015-08-03 | 15218004202 | 86.3 ppb |
2015-08-03 | 15218004502 | 81.9 ppb |
2015-08-03 | 15218004102 | 73.8 ppb |
2015-08-03 | 15218004802 | 32.5 ppb |
2015-08-03 | 15218004002 | 48.5 ppb |
2015-08-03 | 15218004702 | 60.9 ppb |
2015-08-03 | 15218004602 | 50.5 ppb |
2015-08-03 | 15218003802 | 42.4 ppb |
2015-08-03 | 15218004402 | 63.2 ppb |
2015-11-02 | 15309006002 | 31.2 ppb |
2015-11-02 | 15309005602 | 32.3 ppb |
2015-11-02 | 15309005902 | 44.5 ppb |
2015-11-02 | 15309006202 | 29.4 ppb |
2015-11-02 | 15309005802 | 48.6 ppb |
2015-11-02 | 15309005702 | 39.8 ppb |
2015-11-02 | 15309006302 | 35.8 ppb |
2015-11-02 | 15309006102 | 50.5 ppb |
2015-11-02 | 15309006502 | 25.7 ppb |
2015-11-02 | 15309005402 | 19.4 ppb |
2015-11-02 | 15309005502 | 19.3 ppb |
2015-11-02 | 15309006402 | 21.7 ppb |
2016-02-01 | 16036000802 | 38.4 ppb |
2016-02-01 | 16036000902 | 24.6 ppb |
2016-02-01 | 16036001002 | 29.5 ppb |
2016-02-01 | 16036001102 | 25.9 ppb |
2016-02-01 | 16036001202 | 30.6 ppb |
2016-02-01 | 16036000702 | 26.8 ppb |
2016-02-01 | 16036000602 | 32.3 ppb |
2016-02-01 | 16036000502 | 39.2 ppb |
2016-02-01 | 16036000402 | 31.1 ppb |
2016-02-01 | 16036001502 | 9.63 ppb |
2016-02-01 | 16036000302 | 25.4 ppb |
2016-02-01 | 16036000202 | 25.4 ppb |
2016-02-01 | 16036000102 | 19.6 ppb |
2016-05-02 | 16126007802 | 29.0 ppb |
2016-05-02 | 16126007302 | 23.7 ppb |
2016-05-02 | 16126007402 | 30.1 ppb |
2016-05-02 | 16126007202 | 25.7 ppb |
2016-05-02 | 16126007902 | 46.0 ppb |
2016-05-02 | 16126008302 | 33.7 ppb |
2016-05-02 | 16126007702 | 40.3 ppb |
2016-05-02 | 16126008002 | 27.7 ppb |
2016-05-02 | 16126008202 | 34.1 ppb |
2016-05-02 | 16126008102 | 38.1 ppb |
2016-05-02 | 16126007502 | 48.5 ppb |
2016-05-02 | 16126007602 | 51.9 ppb |
2016-07-05 | 16189013301 | 19.0 ppb |
2016-08-01 | 16217001202 | 60.0 ppb |
2016-08-01 | 16217001102 | 68.2 ppb |
2016-08-01 | 16217000102 | 74.2 ppb |
2016-08-01 | 16217001302 | 48.6 ppb |
2016-08-01 | 16217000202 | 76.0 ppb |
2016-08-01 | 16217000902 | 78.0 ppb |
2016-08-01 | 16217000602 | 55.6 ppb |
2016-08-01 | 16217000702 | 52.6 ppb |
2016-08-01 | 16217001402 | 40.1 ppb |
2016-08-01 | 16217001502 | 51.2 ppb |
2016-08-01 | 16217001002 | 66.6 ppb |
2016-08-01 | 16217000802 | 43.5 ppb |
2016-11-01 | 16308009402 | 36.8 ppb |
2016-11-01 | 16308010002 | 21.5 ppb |
2016-11-01 | 16308009602 | 25.6 ppb |
2016-11-01 | 16308009202 | 25.9 ppb |
2016-11-01 | 16308009102 | 18.2 ppb |
2016-11-01 | 16308010102 | 29.4 ppb |
2016-11-01 | 16308009702 | 34.9 ppb |
2016-11-01 | 16308009302 | 31.4 ppb |
2016-11-01 | 16308009802 | 24.9 ppb |
2016-11-01 | 16308009002 | 19.9 ppb |
2016-11-01 | 16308009902 | 28.3 ppb |
2016-11-01 | 16308009502 | 35.7 ppb |
2017-02-01 | 17033010702 | 21.5 ppb |
2017-02-01 | 17033010502 | 16.4 ppb |
2017-02-01 | 17033011101 | 8.24 ppb |
2017-02-01 | 17033010602 | 16.8 ppb |
2017-02-01 | 17033010002 | 23.2 ppb |
2017-02-01 | 17033010102 | 30.5 ppb |
2017-02-01 | 17033009902 | 21.2 ppb |
2017-02-01 | 17033010202 | 29.5 ppb |
2017-02-01 | 17033010302 | 19.8 ppb |
2017-02-01 | 17033009702 | 16.2 ppb |
2017-02-01 | 17033010402 | 29.4 ppb |
2017-02-01 | 17033010802 | 22.1 ppb |
2017-02-01 | 17033009802 | 13.6 ppb |
2017-05-01 | 17124000902 | 22.4 ppb |
2017-05-01 | 17124000802 | 36.9 ppb |
2017-05-01 | 17124000702 | 27.2 ppb |
2017-05-01 | 17124000602 | 37.8 ppb |
2017-05-01 | 17124001102 | 26.9 ppb |
2017-05-01 | 17124000402 | 34.6 ppb |
2017-05-01 | 17124000302 | 28.0 ppb |
2017-05-01 | 17124000202 | 17.0 ppb |
2017-05-01 | 17124000102 | 21.1 ppb |
2017-05-01 | 17124001202 | 32.0 ppb |
2017-05-01 | 17124001002 | 28.6 ppb |
2017-05-01 | 17124000502 | 41.9 ppb |
2017-07-03 | 17187007301 | 24.0 ppb |
2017-08-01 | 17215009402 | 34.0 ppb |
2017-08-01 | 17215009302 | 30.8 ppb |
2017-08-01 | 17215009202 | 33.0 ppb |
2017-08-01 | 17215009702 | 63.0 ppb |
2017-08-01 | 17215009802 | 51.4 ppb |
2017-08-01 | 17215009902 | 61.4 ppb |
2017-08-01 | 17215010002 | 45.9 ppb |
2017-08-01 | 17215010102 | 39.0 ppb |
2017-08-01 | 17215010202 | 30.7 ppb |
2017-08-01 | 17215010302 | 43.7 ppb |
2017-08-01 | 17215009502 | 61.7 ppb |
2017-08-01 | 17215009602 | 63.1 ppb |
2017-11-06 | 17313005202 | 36.8 ppb |
2017-11-06 | 17313004902 | 43.7 ppb |
2017-11-06 | 17313005002 | 36.1 ppb |
2017-11-06 | 17313005102 | 27.3 ppb |
2017-11-06 | 17313004802 | 33.0 ppb |
2017-11-06 | 17313005602 | 26.3 ppb |
2017-11-06 | 17313005402 | 26.2 ppb |
2017-11-06 | 17313005302 | 22.8 ppb |
2017-11-06 | 17313004502 | 18.4 ppb |
2017-11-06 | 17313004702 | 23.7 ppb |
2017-11-06 | 17313005502 | 20.1 ppb |
2017-11-06 | 17313004602 | 17.2 ppb |
2018-01-02 | 18004008901 | 6.56 ppb |
2018-02-05 | 18039003402 | 17.3 ppb |
2018-02-05 | 18039003202 | 20.1 ppb |
2018-02-05 | 18039003802 | 54.5 ppb |
2018-02-05 | 18039004002 | 22.4 ppb |
2018-02-05 | 18039003002 | 12.7 ppb |
2018-02-05 | 18039003302 | 23.1 ppb |
2018-02-05 | 18039003502 | 23.5 ppb |
2018-02-05 | 18039003102 | 16.2 ppb |
2018-02-05 | 18039003902 | 20.1 ppb |
2018-02-05 | 18039002902 | 12.8 ppb |
2018-02-05 | 18039003702 | 17.5 ppb |
2018-02-05 | 18039003602 | 18.5 ppb |
2018-05-01 | 18123010002 | 25.1 ppb |
2018-05-01 | 18123008902 | 25.2 ppb |
2018-05-01 | 18123009702 | 34.8 ppb |
2018-05-01 | 18123009402 | 51.8 ppb |
2018-05-01 | 18123009202 | 49.6 ppb |
2018-05-01 | 18123009102 | 43.8 ppb |
2018-05-01 | 18123009602 | 33.3 ppb |
2018-05-01 | 18123009902 | 33.3 ppb |
2018-05-01 | 18123009802 | 40.0 ppb |
2018-05-01 | 18123009002 | 33.5 ppb |
2018-05-01 | 18123008802 | 29.2 ppb |
2018-05-01 | 18123009302 | 39.7 ppb |
2018-07-03 | 18186010409 | 33.8 ppb |
2018-08-06 | 18221011702 | 69.7 ppb |
2018-08-06 | 18221011402 | 46.6 ppb |
2018-08-06 | 18221011302 | 60.2 ppb |
2018-08-06 | 18221011902 | 45.1 ppb |
2018-08-06 | 18221011002 | 34.0 ppb |
2018-08-06 | 18221011602 | 48.9 ppb |
2018-08-06 | 18221012002 | 29.1 ppb |
2018-08-06 | 18221011802 | 61.8 ppb |
2018-08-06 | 18221011502 | 55.9 ppb |
2018-08-06 | 18221012102 | 35.9 ppb |
2018-08-06 | 18221011202 | 34.1 ppb |
2018-08-06 | 18221011102 | 38.8 ppb |
2018-11-05 | 18311005102 | 69.8 ppb |
2018-11-05 | 18311005502 | 34.9 ppb |
2018-11-05 | 18311004502 | 33.8 ppb |
2018-11-05 | 18311004802 | 36.8 ppb |
2018-11-05 | 18311004702 | 40.6 ppb |
2018-11-05 | 18311005402 | 38.6 ppb |
2018-11-05 | 18311005202 | 65.0 ppb |
2018-11-05 | 18311004602 | 32.5 ppb |
2018-11-05 | 18311005302 | 51.0 ppb |
2018-11-05 | 18311004902 | 66.7 ppb |
2018-11-05 | 18311004402 | 35.8 ppb |
2018-11-05 | 18311005002 | 54.9 ppb |
2019-01-07 | 19010010201 | 12.8 ppb |
2019-02-04 | 19038006602 | 25.8 ppb |
2019-02-04 | 19038007202 | 23.1 ppb |
2019-02-04 | 19038006802 | 26.1 ppb |
2019-02-04 | 19038006702 | 29.9 ppb |
2019-02-04 | 19038006902 | 38.4 ppb |
2019-02-04 | 19038007402 | 34.5 ppb |
2019-02-04 | 19038007002 | 15.4 ppb |
2019-02-04 | 19038006502 | 23.5 ppb |
2019-02-04 | 19038006402 | 17.5 ppb |
2019-02-04 | 19038007102 | 24.2 ppb |
2019-02-04 | 19038006302 | 18.1 ppb |
2019-02-04 | 19038007302 | 24.6 ppb |
2019-05-06 | 19129008902 | 41.5 ppb |
2019-05-06 | 19129008802 | 38.3 ppb |
2019-05-06 | 19129009102 | 71.6 ppb |
2019-05-06 | 19129008502 | 46.2 ppb |
2019-05-06 | 19129008102 | 25.5 ppb |
2019-05-06 | 19129008202 | 41.7 ppb |
2019-05-06 | 19129008002 | 33.0 ppb |
2019-05-06 | 19129008702 | 42.4 ppb |
2019-05-06 | 19129009002 | 48.3 ppb |
2019-05-06 | 19129008302 | 43.8 ppb |
2019-05-06 | 19129008402 | 56.7 ppb |
2019-05-06 | 19129008602 | 51.2 ppb |
2019-08-05 | 19220010102 | 51.9 ppb |
2019-08-05 | 19220010702 | 65.3 ppb |
2019-08-05 | 19220010302 | 48.4 ppb |
2019-08-05 | 19220009902 | 56.7 ppb |
2019-08-05 | 19220009802 | 43.7 ppb |
2019-08-05 | 19220010402 | 49.3 ppb |
2019-08-05 | 19220010502 | 36.1 ppb |
2019-08-05 | 19220010602 | 44.8 ppb |
2019-08-05 | 19220010202 | 64.2 ppb |
2019-08-05 | 19220010002 | 66.8 ppb |
2019-08-05 | 19220009602 | 44.2 ppb |
2019-08-05 | 19220009702 | 30.8 ppb |
2019-09-09 | 19254006001 | 18.9 ppb |
2019-11-04 | 19311012702 | 24.9 ppb |
2019-11-04 | 19311011902 | 30.4 ppb |
2019-11-04 | 19311012002 | 40.8 ppb |
2019-11-04 | 19311012402 | 26.0 ppb |
2019-11-04 | 19311012302 | 41.7 ppb |
2019-11-04 | 19311011702 | 20.8 ppb |
2019-11-04 | 19311011802 | 22.4 ppb |
2019-11-04 | 19311012202 | 32.9 ppb |
2019-11-04 | 19311012102 | 44.1 ppb |
2019-11-04 | 19311012802 | 29.8 ppb |
2019-11-04 | 19311012602 | 28.0 ppb |
2019-11-04 | 19311012502 | 30.8 ppb |