Chloroform
Newark 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 58.9 ppb | 49 | 49 | 40.4 ppb - 79.6 ppb |
2015 | 60.3 ppb | 49 | 49 | 4.23 ppb - 140.0 ppb |
2016 | 43.0 ppb | 49 | 49 | 4.40 ppb - 64.6 ppb |
2017 | 39.5 ppb | 49 | 49 | 9.80 ppb - 69.0 ppb |
2018 | 72.3 ppb | 60 | 60 | 17.9 ppb - 136.0 ppb |
2019 | 50.3 ppb | 49 | 48 | ND - 107.5 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 |
---|---|---|
2014-03-11 | 340313044 | 45.1 ppb |
2014-03-11 | 340313048 | 46.2 ppb |
2014-03-11 | 340313046 | 45.7 ppb |
2014-03-11 | 340313050 | 46.4 ppb |
2014-03-11 | 340313052 | 42.1 ppb |
2014-03-11 | 340313042 | 46.6 ppb |
2014-03-11 | 340313040 | 57.5 ppb |
2014-03-11 | 340313038 | 44.3 ppb |
2014-03-11 | 340313036 | 46.8 ppb |
2014-03-11 | 340313034 | 47.9 ppb |
2014-03-11 | 340313032 | 49.2 ppb |
2014-03-11 | 340313030 | 46.0 ppb |
2014-06-10 | 340611049 | 72.4 ppb |
2014-06-10 | 340611053 | 70.4 ppb |
2014-06-10 | 340611051 | 66.4 ppb |
2014-06-10 | 340611055 | 79.6 ppb |
2014-06-10 | 340611057 | 58.6 ppb |
2014-06-10 | 340611047 | 65.7 ppb |
2014-06-10 | 340611045 | 65.7 ppb |
2014-06-10 | 340611043 | 74.0 ppb |
2014-06-10 | 340611041 | 78.3 ppb |
2014-06-10 | 340611039 | 68.8 ppb |
2014-06-10 | 340611037 | 49.7 ppb |
2014-06-10 | 340611035 | 67.7 ppb |
2014-09-09 | JB75992-1 | 55.1 ppb |
2014-09-10 | 340910064 | 74.8 ppb |
2014-09-10 | 340910068 | 70.5 ppb |
2014-09-10 | 340910066 | 71.6 ppb |
2014-09-10 | 340910081 | 68.0 ppb |
2014-09-10 | 340910083 | 62.3 ppb |
2014-09-10 | 340910062 | 68.5 ppb |
2014-09-10 | 340910060 | 60.7 ppb |
2014-09-10 | 340910078 | 74.1 ppb |
2014-09-10 | 340910076 | 71.6 ppb |
2014-09-10 | 340910074 | 73.6 ppb |
2014-09-10 | 340910072 | 70.7 ppb |
2014-09-10 | 340910070 | 70.8 ppb |
2014-12-10 | 341210050 | 50.7 ppb |
2014-12-10 | 341210054 | 50.2 ppb |
2014-12-10 | 341210052 | 53.4 ppb |
2014-12-10 | 341210056 | 52.9 ppb |
2014-12-10 | 341210058 | 46.0 ppb |
2014-12-10 | 341210048 | 54.0 ppb |
2014-12-10 | 341210046 | 40.4 ppb |
2014-12-10 | 341210044 | 54.3 ppb |
2014-12-10 | 341210042 | 54.0 ppb |
2014-12-10 | 341210040 | 49.7 ppb |
2014-12-10 | 341210038 | 52.8 ppb |
2014-12-10 | 341210036 | 53.1 ppb |
2015-03-11 | 350311064 | 27.5 ppb |
2015-03-11 | 350311068 | 29.0 ppb |
2015-03-11 | 350311066 | 28.5 ppb |
2015-03-11 | 350311071 | 29.8 ppb |
2015-03-11 | 350311073 | 30.9 ppb |
2015-03-11 | 350311062 | 28.4 ppb |
2015-03-11 | 350311060 | 30.9 ppb |
2015-03-11 | 350311058 | 28.7 ppb |
2015-03-11 | 350311056 | 29.8 ppb |
2015-03-11 | 350311054 | 27.4 ppb |
2015-03-11 | 350311052 | 30.6 ppb |
2015-03-11 | 350311050 | 27.9 ppb |
2015-06-10 | 350610061 | 76.5 ppb |
2015-06-10 | 350610065 | 73.0 ppb |
2015-06-10 | 350610063 | 79.8 ppb |
2015-06-10 | 350610067 | 79.9 ppb |
2015-06-10 | 350610069 | 78.1 ppb |
2015-06-10 | 350610059 | 58.1 ppb |
2015-06-10 | 350610057 | 60.1 ppb |
2015-06-10 | 350610055 | 54.3 ppb |
2015-06-10 | 350610053 | 77.5 ppb |
2015-06-10 | 350610051 | 79.7 ppb |
2015-06-10 | 350610049 | 75.7 ppb |
2015-06-10 | 350610047 | 75.9 ppb |
2015-09-10 | 5090326-12 | 79.9 ppb |
2015-09-10 | 5090326-11 | 81.0 ppb |
2015-09-10 | 5090326-10 | 87.1 ppb |
2015-09-10 | 5090326-09 | 80.0 ppb |
2015-09-10 | 5090326-08 | 86.6 ppb |
2015-09-10 | 5090326-07 | 80.0 ppb |
2015-09-10 | 5090326-06 | 78.0 ppb |
2015-09-10 | 5090326-05 | 87.8 ppb |
2015-09-10 | 5090326-04 | 108.0 ppb |
2015-09-10 | 5090326-03 | 140.0 ppb |
2015-09-10 | 5090326-02 | 91.9 ppb |
2015-09-10 | 5090326-01 | 73.1 ppb |
2015-09-11 | 5090325-01 | 32.0 ppb |
2015-12-10 | DWSC913-8 | 51.1 ppb |
2015-12-10 | DWSC913-10 | 57.6 ppb |
2015-12-10 | DWSC913-9 | 58.8 ppb |
2015-12-10 | DWSC913-11 | 59.5 ppb |
2015-12-10 | DWSC913-12 | 54.6 ppb |
2015-12-10 | DWSC913-7 | 59.5 ppb |
2015-12-10 | DWSC913-6 | 56.7 ppb |
2015-12-10 | DWSC913-5 | 4.23 ppb |
2015-12-10 | DWSC913-4 | 59.8 ppb |
2015-12-10 | DWSC913-3 | 55.0 ppb |
2015-12-10 | DWSC913-2 | 58.2 ppb |
2015-12-10 | DWSC913-1 | 55.9 ppb |
2016-03-10 | 360310121 | 45.3 ppb |
2016-03-10 | 360310125 | 48.9 ppb |
2016-03-10 | 360310123 | 46.7 ppb |
2016-03-10 | 360310127 | 47.4 ppb |
2016-03-10 | 360310129 | 43.2 ppb |
2016-03-10 | 360310119 | 49.9 ppb |
2016-03-10 | 360310117 | 46.3 ppb |
2016-03-10 | 360310115 | 4.40 ppb |
2016-03-10 | 360310113 | 57.2 ppb |
2016-03-10 | 360310111 | 46.6 ppb |
2016-03-10 | 360310109 | 58.6 ppb |
2016-03-10 | 360310107 | 47.9 ppb |
2016-06-10 | 360610038 | 33.3 ppb |
2016-06-10 | 360610042 | 48.0 ppb |
2016-06-10 | 360610040 | 46.1 ppb |
2016-06-10 | 360610044 | 55.8 ppb |
2016-06-10 | 360610046 | 55.7 ppb |
2016-06-10 | 360610036 | 64.6 ppb |
2016-06-10 | 360610034 | 57.7 ppb |
2016-06-10 | 360610032 | 38.9 ppb |
2016-06-10 | 360610030 | 41.3 ppb |
2016-06-10 | 360610028 | 52.1 ppb |
2016-06-10 | 360610026 | 39.7 ppb |
2016-06-10 | 360610024 | 43.5 ppb |
2016-09-01 | 360901006 | 11.5 ppb |
2016-09-12 | 360912047 | 39.8 ppb |
2016-09-12 | 360912051 | 38.3 ppb |
2016-09-12 | 360912049 | 38.9 ppb |
2016-09-12 | 360912053 | 39.8 ppb |
2016-09-12 | 360912055 | 38.5 ppb |
2016-09-12 | 360912045 | 39.8 ppb |
2016-09-12 | 360912043 | 47.9 ppb |
2016-09-12 | 360912040 | 38.2 ppb |
2016-09-12 | 360912038 | 39.9 ppb |
2016-09-12 | 360912036 | 38.9 ppb |
2016-09-12 | 360912034 | 42.3 ppb |
2016-09-12 | 360912032 | 38.0 ppb |
2016-12-09 | 361209079 | 40.0 ppb |
2016-12-09 | 361209083 | 28.0 ppb |
2016-12-09 | 361209081 | 37.2 ppb |
2016-12-09 | 361209085 | 42.8 ppb |
2016-12-09 | 361209087 | 46.0 ppb |
2016-12-09 | 361209077 | 50.5 ppb |
2016-12-09 | 361209075 | 44.6 ppb |
2016-12-09 | 361209073 | 48.1 ppb |
2016-12-09 | 361209071 | 31.8 ppb |
2016-12-09 | 361209069 | 33.0 ppb |
2016-12-09 | 361209067 | 52.4 ppb |
2016-12-09 | 361209065 | 43.5 ppb |
2017-03-10 | 370310040 | 33.6 ppb |
2017-03-10 | 370310044 | 36.9 ppb |
2017-03-10 | 370310042 | 30.5 ppb |
2017-03-10 | 370310046 | 46.3 ppb |
2017-03-10 | 370310048 | 58.8 ppb |
2017-03-10 | 370310038 | 38.6 ppb |
2017-03-10 | 370310036 | 45.3 ppb |
2017-03-10 | 370310034 | 29.9 ppb |
2017-03-10 | 370310032 | 33.1 ppb |
2017-03-10 | 370310030 | 38.9 ppb |
2017-03-10 | 370310028 | 31.0 ppb |
2017-03-10 | 370310026 | 35.1 ppb |
2017-06-09 | 370609061 | 47.3 ppb |
2017-06-09 | 370609065 | 48.5 ppb |
2017-06-09 | 370609063 | 64.5 ppb |
2017-06-09 | 370609067 | 62.3 ppb |
2017-06-09 | 370609069 | 64.1 ppb |
2017-06-09 | 370609059 | 55.3 ppb |
2017-06-09 | 370609057 | 49.6 ppb |
2017-06-09 | 370609055 | 47.9 ppb |
2017-06-09 | 370609053 | 69.0 ppb |
2017-06-09 | 370609051 | 49.5 ppb |
2017-06-09 | 370609049 | 52.4 ppb |
2017-06-09 | 370609047 | 51.2 ppb |
2017-09-06 | 370906027 | 9.80 ppb |
2017-09-08 | 370908060 | 34.3 ppb |
2017-09-08 | 370908064 | 34.5 ppb |
2017-09-08 | 370908062 | 32.5 ppb |
2017-09-08 | 370908066 | 45.3 ppb |
2017-09-08 | 370908068 | 32.9 ppb |
2017-09-08 | 370908058 | 26.2 ppb |
2017-09-08 | 370908056 | 45.4 ppb |
2017-09-08 | 370908054 | 38.6 ppb |
2017-09-08 | 370908052 | 28.1 ppb |
2017-09-08 | 370908050 | 35.6 ppb |
2017-09-08 | 370908048 | 48.3 ppb |
2017-09-08 | 370908046 | 25.9 ppb |
2017-12-11 | 371211060 | 32.4 ppb |
2017-12-11 | 371211064 | 31.5 ppb |
2017-12-11 | 371211062 | 22.4 ppb |
2017-12-11 | 371211066 | 36.5 ppb |
2017-12-11 | 371211068 | 34.6 ppb |
2017-12-11 | 371211058 | 31.7 ppb |
2017-12-11 | 371211056 | 35.6 ppb |
2017-12-11 | 371211054 | 32.9 ppb |
2017-12-11 | 371211052 | 30.2 ppb |
2017-12-11 | 371211050 | 32.4 ppb |
2017-12-11 | 371211048 | 28.4 ppb |
2017-12-11 | 371211046 | 29.1 ppb |
2018-03-09 | 380309128 | 17.9 ppb |
2018-03-09 | 380309132 | 23.6 ppb |
2018-03-09 | 380309130 | 28.0 ppb |
2018-03-09 | 380309134 | 22.9 ppb |
2018-03-09 | 380309136 | 39.5 ppb |
2018-03-09 | 380309126 | 27.6 ppb |
2018-03-09 | 380309124 | 54.4 ppb |
2018-03-09 | 380309122 | 31.4 ppb |
2018-03-09 | 380309120 | 32.4 ppb |
2018-03-09 | 380309118 | 27.8 ppb |
2018-03-09 | 380309116 | 27.2 ppb |
2018-03-09 | 380309114 | 34.9 ppb |
2018-06-07 | 380608081 | 79.5 ppb |
2018-06-07 | 380608085 | 102.0 ppb |
2018-06-07 | 380608083 | 93.6 ppb |
2018-06-07 | 380608087 | 90.6 ppb |
2018-06-07 | 380608089 | 64.9 ppb |
2018-06-07 | 380608079 | 96.0 ppb |
2018-06-07 | 380608077 | 65.1 ppb |
2018-06-07 | 380608075 | 97.9 ppb |
2018-06-07 | 380608073 | 105.0 ppb |
2018-06-07 | 380608071 | 90.8 ppb |
2018-06-07 | 380608069 | 84.3 ppb |
2018-06-07 | 380608067 | 88.8 ppb |
2018-07-17 | 380717041 | 70.4 ppb |
2018-09-07 | 18091001-04 | 91.7 ppb |
2018-09-07 | 380907120 | 136.0 ppb |
2018-09-07 | 380907124 | 93.9 ppb |
2018-09-07 | 18091001-11 | 75.7 ppb |
2018-09-07 | 380907122 | 99.7 ppb |
2018-09-07 | 18091001-10 | 93.4 ppb |
2018-09-07 | 18091001-05 | 94.6 ppb |
2018-09-07 | 380907126 | 99.9 ppb |
2018-09-07 | 380907128 | 92.2 ppb |
2018-09-07 | 18091001-01 | 81.8 ppb |
2018-09-07 | 380907118 | 101.0 ppb |
2018-09-07 | 18091001-03 | 87.7 ppb |
2018-09-07 | 18091001-06 | 70.2 ppb |
2018-09-07 | 380907116 | 70.6 ppb |
2018-09-07 | 18091001-08 | 98.8 ppb |
2018-09-07 | 380907114 | 98.4 ppb |
2018-09-07 | 380907112 | 93.8 ppb |
2018-09-07 | 18091001-02 | 93.3 ppb |
2018-09-07 | 380907110 | 107.0 ppb |
2018-09-07 | 18091001-09 | 95.0 ppb |
2018-09-07 | 18091001-07 | 86.7 ppb |
2018-09-07 | 380907108 | 91.0 ppb |
2018-09-12 | 380912010 | 68.2 ppb |
2018-12-10 | 18121201-04 | 58.6 ppb |
2018-12-10 | 18121201-12 | 59.3 ppb |
2018-12-10 | 18121201-11 | 59.3 ppb |
2018-12-10 | 18121201-05 | 61.4 ppb |
2018-12-10 | 18121201-01 | 59.7 ppb |
2018-12-10 | 18121201-03 | 58.6 ppb |
2018-12-10 | 18121201-06 | 64.1 ppb |
2018-12-10 | 18121201-08 | 59.9 ppb |
2018-12-10 | 18121201-09 | 58.2 ppb |
2018-12-10 | 18121201-02 | 59.2 ppb |
2018-12-10 | 18121201-10 | 60.7 ppb |
2018-12-10 | 18121201-07 | 60.4 ppb |
2019-03-11 | 390311079.1 | 43.0 ppb |
2019-03-11 | 390311081.1 | 42.6 ppb |
2019-03-11 | 390311080.1 | 44.3 ppb |
2019-03-11 | 390311082.1 | 69.3 ppb |
2019-03-11 | 390311083.1 | 35.1 ppb |
2019-03-11 | 390311078.1 | 32.8 ppb |
2019-03-11 | 390311077.1 | 49.8 ppb |
2019-03-11 | 390311076.1 | 44.1 ppb |
2019-03-11 | 390311075.1 | 40.4 ppb |
2019-03-11 | 390311074.1 | 44.6 ppb |
2019-03-11 | 390311073.1 | 39.6 ppb |
2019-03-11 | 390311072.1 | 39.1 ppb |
2019-06-19 | 390619084.1 | 78.5 ppb |
2019-06-19 | 390619078.1 | 83.5 ppb |
2019-06-19 | 390619077.1 | 86.5 ppb |
2019-06-19 | 390619075.1 | 107.5 ppb |
2019-06-19 | 390619081.1 | 60.0 ppb |
2019-06-19 | 390619083.1 | 62.7 ppb |
2019-06-19 | 390619082.1 | 60.2 ppb |
2019-06-19 | 390619079.1 | 84.3 ppb |
2019-06-19 | 390619073.1 | 94.1 ppb |
2019-06-19 | 390619074.1 | 85.5 ppb |
2019-06-19 | 390619080.1 | 79.4 ppb |
2019-06-19 | 390619076.1 | 75.2 ppb |
2019-07-19 | 390719024 | 31.5 ppb |
2019-09-24 | 390924134.1 | 46.6 ppb |
2019-09-24 | 390924136.1 | 50.7 ppb |
2019-09-24 | 390924135.1 | 45.9 ppb |
2019-09-24 | 390924137.1 | 44.5 ppb |
2019-09-24 | 390924138.1 | 49.5 ppb |
2019-09-24 | 390924133.1 | 41.6 ppb |
2019-09-24 | 390924132.1 | 47.9 ppb |
2019-09-24 | 390924131.1 | ND |
2019-09-24 | 390924130.1 | 50.8 ppb |
2019-09-24 | 390924129.1 | 51.1 ppb |
2019-09-24 | 390924128.1 | 51.2 ppb |
2019-09-24 | 390924127.1 | 51.9 ppb |
2019-12-17 | 391217102.1A | 37.6 ppb |
2019-12-17 | 391217104.1A | 37.7 ppb |
2019-12-17 | 391217105.1 | 38.9 ppb |
2019-12-17 | 391217106.1 | 28.9 ppb |
2019-12-17 | 391217101.1A | 31.6 ppb |
2019-12-17 | 391217100.1A | 37.3 ppb |
2019-12-17 | 391217099.1A | 38.0 ppb |
2019-12-17 | 391217098.1A | 39.1 ppb |
2019-12-17 | 391217097.1A | 34.1 ppb |
2019-12-17 | 391217096.1A | 33.4 ppb |
2019-12-18 | 391218097.1 | 34.8 ppb |
2019-12-20 | 391220034.1 | 30.1 ppb |