Chloroform
Cobb County
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 27.4 ppb | 48 | 48 | 9.90 ppb - 59.0 ppb |
2015 | 30.2 ppb | 48 | 48 | 6.90 ppb - 72.0 ppb |
2016 | 31.6 ppb | 48 | 48 | 9.20 ppb - 74.0 ppb |
2017 | 32.1 ppb | 48 | 48 | 9.60 ppb - 80.0 ppb |
2018 | 28.0 ppb | 48 | 48 | 8.70 ppb - 58.0 ppb |
2019 | 29.5 ppb | 49 | 49 | 7.50 ppb - 58.0 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 |
---|---|---|
2014-02-04 | AI27346 | 23.0 ppb |
2014-02-04 | AI27347 | 16.0 ppb |
2014-02-04 | AI27348 | 21.0 ppb |
2014-02-04 | AI27349 | 20.0 ppb |
2014-02-04 | AI27350 | 44.0 ppb |
2014-02-04 | AI27351 | 19.0 ppb |
2014-02-04 | AI27352 | 13.0 ppb |
2014-02-04 | AI27353 | 12.0 ppb |
2014-02-04 | AI27354 | 29.0 ppb |
2014-02-04 | AI27355 | 20.0 ppb |
2014-02-04 | AI27356 | 9.90 ppb |
2014-02-04 | AI27357 | 25.0 ppb |
2014-05-06 | AI39652 | 31.0 ppb |
2014-05-06 | AI39653 | 26.0 ppb |
2014-05-06 | AI39654 | 14.0 ppb |
2014-05-06 | AI39655 | 36.0 ppb |
2014-05-06 | AI39656 | 40.0 ppb |
2014-05-06 | AI39657 | 33.0 ppb |
2014-05-06 | AI39658 | 18.0 ppb |
2014-05-06 | AI39659 | 21.0 ppb |
2014-05-06 | AI39660 | 46.0 ppb |
2014-05-06 | AI39661 | 19.0 ppb |
2014-05-06 | AI39662 | 17.0 ppb |
2014-05-06 | AI39663 | 30.0 ppb |
2014-08-06 | AI48404 | 35.0 ppb |
2014-08-06 | AI48405 | 35.0 ppb |
2014-08-06 | AI48406 | 19.0 ppb |
2014-08-06 | AI48407 | 44.0 ppb |
2014-08-06 | AI48408 | 46.0 ppb |
2014-08-06 | AI48409 | 35.0 ppb |
2014-08-06 | AI48410 | 21.0 ppb |
2014-08-06 | AI48411 | 26.0 ppb |
2014-08-06 | AI48412 | 54.0 ppb |
2014-08-06 | AI48413 | 37.0 ppb |
2014-08-06 | AI48414 | 22.0 ppb |
2014-08-06 | AI48415 | 39.0 ppb |
2014-11-04 | AI58833 | 35.0 ppb |
2014-11-04 | AI58834 | 18.0 ppb |
2014-11-04 | AI58835 | 19.0 ppb |
2014-11-04 | AI58836 | 31.0 ppb |
2014-11-04 | AI58837 | 38.0 ppb |
2014-11-04 | AI58838 | 29.0 ppb |
2014-11-04 | AI58839 | 11.0 ppb |
2014-11-04 | AI58840 | 16.0 ppb |
2014-11-04 | AI58841 | 59.0 ppb |
2014-11-04 | AI58842 | 23.0 ppb |
2014-11-04 | AI58843 | 10.00 ppb |
2014-11-04 | AI58844 | 31.0 ppb |
2015-02-03 | AI63882 | 23.0 ppb |
2015-02-03 | AI63883 | 14.0 ppb |
2015-02-03 | AI63884 | 18.0 ppb |
2015-02-03 | AI63885 | 25.0 ppb |
2015-02-03 | AI63886 | 52.0 ppb |
2015-02-03 | AI63887 | 25.0 ppb |
2015-02-03 | AI63888 | 11.0 ppb |
2015-02-03 | AI63889 | 11.0 ppb |
2015-02-03 | AI63890 | 55.0 ppb |
2015-02-03 | AI63891 | 19.0 ppb |
2015-02-03 | AI63892 | 6.90 ppb |
2015-02-03 | AI63893 | 36.0 ppb |
2015-05-05 | AI76149 | 34.0 ppb |
2015-05-05 | AI76150 | 20.0 ppb |
2015-05-05 | AI76151 | 23.0 ppb |
2015-05-05 | AI76152 | 35.0 ppb |
2015-05-05 | AI76153 | 41.0 ppb |
2015-05-05 | AI76154 | 23.0 ppb |
2015-05-05 | AI76155 | 16.0 ppb |
2015-05-05 | AI76156 | 18.0 ppb |
2015-05-05 | AI76157 | 47.0 ppb |
2015-05-05 | AI76158 | 29.0 ppb |
2015-05-05 | AI76159 | 18.0 ppb |
2015-05-05 | AI76160 | 34.0 ppb |
2015-08-04 | AI85145 | 33.0 ppb |
2015-08-04 | AI85146 | 22.0 ppb |
2015-08-04 | AI85147 | 19.0 ppb |
2015-08-04 | AI85148 | 42.0 ppb |
2015-08-04 | AI85149 | 31.0 ppb |
2015-08-04 | AI85150 | 40.0 ppb |
2015-08-04 | AI85151 | 19.0 ppb |
2015-08-04 | AI85152 | 24.0 ppb |
2015-08-04 | AI85153 | 69.0 ppb |
2015-08-04 | AI85154 | 33.0 ppb |
2015-08-04 | AI85155 | 14.0 ppb |
2015-08-04 | AI85156 | 38.0 ppb |
2015-11-03 | AJ00192 | 41.0 ppb |
2015-11-03 | AJ00193 | 25.0 ppb |
2015-11-03 | AJ00194 | 17.0 ppb |
2015-11-03 | AJ00195 | 53.0 ppb |
2015-11-03 | AJ00196 | 51.0 ppb |
2015-11-03 | AJ00197 | 33.0 ppb |
2015-11-03 | AJ00198 | 22.0 ppb |
2015-11-03 | AJ00199 | 19.0 ppb |
2015-11-03 | AJ00200 | 72.0 ppb |
2015-11-03 | AJ00201 | 27.0 ppb |
2015-11-03 | AJ00202 | 23.0 ppb |
2015-11-03 | AJ00203 | 50.0 ppb |
2016-02-02 | AJ05444 | 25.0 ppb |
2016-02-02 | AJ05445 | 16.0 ppb |
2016-02-02 | AJ05446 | 19.0 ppb |
2016-02-02 | AJ05447 | 21.0 ppb |
2016-02-02 | AJ05448 | 55.0 ppb |
2016-02-02 | AJ05449 | 18.0 ppb |
2016-02-02 | AJ05450 | 9.20 ppb |
2016-02-02 | AJ05451 | 12.0 ppb |
2016-02-02 | AJ05452 | 45.0 ppb |
2016-02-02 | AJ05453 | 28.0 ppb |
2016-02-02 | AJ05454 | 9.20 ppb |
2016-02-02 | AJ05455 | 36.0 ppb |
2016-05-04 | AJ11475 | 37.0 ppb |
2016-05-04 | AJ11476 | 34.0 ppb |
2016-05-04 | AJ11477 | 18.0 ppb |
2016-05-04 | AJ11478 | 41.0 ppb |
2016-05-04 | AJ11479 | 40.0 ppb |
2016-05-04 | AJ11480 | 33.0 ppb |
2016-05-04 | AJ11481 | 31.0 ppb |
2016-05-04 | AJ11482 | 34.0 ppb |
2016-05-04 | AJ11483 | 40.0 ppb |
2016-05-04 | AJ11484 | 27.0 ppb |
2016-05-04 | AJ11485 | 28.0 ppb |
2016-05-04 | AJ11486 | 35.0 ppb |
2016-08-02 | AJ20497 | 50.0 ppb |
2016-08-02 | AJ20498 | 38.0 ppb |
2016-08-02 | AJ20499 | 25.0 ppb |
2016-08-02 | AJ20500 | 50.0 ppb |
2016-08-02 | AJ20501 | 59.0 ppb |
2016-08-02 | AJ20502 | 58.0 ppb |
2016-08-02 | AJ20503 | 30.0 ppb |
2016-08-02 | AJ20504 | 38.0 ppb |
2016-08-02 | AJ20505 | 74.0 ppb |
2016-08-02 | AJ20506 | 31.0 ppb |
2016-08-02 | AJ20507 | 28.0 ppb |
2016-08-02 | AJ20508 | 49.0 ppb |
2016-11-02 | AJ32507 | 17.0 ppb |
2016-11-02 | AJ32508 | 19.0 ppb |
2016-11-02 | AJ32509 | 19.0 ppb |
2016-11-02 | AJ32510 | 34.0 ppb |
2016-11-02 | AJ32511 | 35.0 ppb |
2016-11-02 | AJ32512 | 28.0 ppb |
2016-11-02 | AJ32513 | 16.0 ppb |
2016-11-02 | AJ32514 | 18.0 ppb |
2016-11-02 | AJ32515 | 47.0 ppb |
2016-11-02 | AJ32516 | 19.0 ppb |
2016-11-02 | AJ32517 | 13.0 ppb |
2016-11-02 | AJ32518 | 31.0 ppb |
2017-02-07 | AJ45810 | 25.0 ppb |
2017-02-07 | AJ45811 | 16.0 ppb |
2017-02-07 | AJ45812 | 11.0 ppb |
2017-02-07 | AJ45813 | 24.0 ppb |
2017-02-07 | AJ45814 | 32.0 ppb |
2017-02-07 | AJ45815 | 24.0 ppb |
2017-02-07 | AJ45816 | 10.00 ppb |
2017-02-07 | AJ45817 | 16.0 ppb |
2017-02-07 | AJ45818 | 18.0 ppb |
2017-02-07 | AJ45819 | 12.0 ppb |
2017-02-07 | AJ45820 | 9.60 ppb |
2017-02-07 | AJ45821 | 21.0 ppb |
2017-05-02 | AJ54391 | 50.0 ppb |
2017-05-02 | AJ54392 | 42.0 ppb |
2017-05-02 | AJ54393 | 14.0 ppb |
2017-05-02 | AJ54394 | 32.0 ppb |
2017-05-02 | AJ54395 | 36.0 ppb |
2017-05-02 | AJ54396 | 40.0 ppb |
2017-05-02 | AJ54397 | 28.0 ppb |
2017-05-02 | AJ54398 | 39.0 ppb |
2017-05-02 | AJ54399 | 31.0 ppb |
2017-05-02 | AJ54400 | 24.0 ppb |
2017-05-02 | AJ54401 | 28.0 ppb |
2017-05-02 | AJ54402 | 35.0 ppb |
2017-08-02 | AJ62465 | 66.0 ppb |
2017-08-02 | AJ62466 | 48.0 ppb |
2017-08-02 | AJ62467 | 29.0 ppb |
2017-08-02 | AJ62468 | 56.0 ppb |
2017-08-02 | AJ62469 | 59.0 ppb |
2017-08-02 | AJ62470 | 55.0 ppb |
2017-08-02 | AJ62471 | 22.0 ppb |
2017-08-02 | AJ62472 | 44.0 ppb |
2017-08-02 | AJ62473 | 80.0 ppb |
2017-08-02 | AJ62474 | 33.0 ppb |
2017-08-02 | AJ62475 | 23.0 ppb |
2017-08-02 | AJ62476 | 44.0 ppb |
2017-11-01 | AJ72761 | 40.0 ppb |
2017-11-01 | AJ72762 | 27.0 ppb |
2017-11-01 | AJ72763 | 17.0 ppb |
2017-11-01 | AJ72764 | 48.0 ppb |
2017-11-01 | AJ72765 | 41.0 ppb |
2017-11-01 | AJ72766 | 38.0 ppb |
2017-11-01 | AJ72767 | 14.0 ppb |
2017-11-01 | AJ72768 | 28.0 ppb |
2017-11-01 | AJ72769 | 33.0 ppb |
2017-11-01 | AJ72770 | 25.0 ppb |
2017-11-01 | AJ72771 | 12.0 ppb |
2017-11-01 | AJ72772 | 39.0 ppb |
2018-02-02 | AJ82994 | 22.0 ppb |
2018-02-02 | AJ82995 | 16.0 ppb |
2018-02-02 | AJ82996 | 8.70 ppb |
2018-02-02 | AJ82997 | 23.0 ppb |
2018-02-02 | AJ82998 | 31.0 ppb |
2018-02-02 | AJ82999 | 19.0 ppb |
2018-02-02 | AJ83000 | 15.0 ppb |
2018-02-02 | AJ83001 | 18.0 ppb |
2018-02-02 | AJ83002 | 20.0 ppb |
2018-02-02 | AJ83003 | 10.00 ppb |
2018-02-02 | AJ83004 | 13.0 ppb |
2018-02-02 | AJ83005 | 23.0 ppb |
2018-05-03 | AJ88552 | 36.0 ppb |
2018-05-03 | AJ88553 | 33.0 ppb |
2018-05-03 | AJ88554 | 19.0 ppb |
2018-05-03 | AJ88555 | 36.0 ppb |
2018-05-03 | AJ88556 | 45.0 ppb |
2018-05-03 | AJ88557 | 33.0 ppb |
2018-05-03 | AJ88558 | 20.0 ppb |
2018-05-03 | AJ88559 | 37.0 ppb |
2018-05-03 | AJ88560 | 31.0 ppb |
2018-05-03 | AJ88561 | 26.0 ppb |
2018-05-03 | AJ88562 | 18.0 ppb |
2018-05-03 | AJ88563 | 44.0 ppb |
2018-08-01 | AJ96141 | 58.0 ppb |
2018-08-01 | AJ96142 | 32.0 ppb |
2018-08-01 | AJ96143 | 30.0 ppb |
2018-08-01 | AJ96144 | 47.0 ppb |
2018-08-01 | AJ96145 | 54.0 ppb |
2018-08-01 | AJ96146 | 42.0 ppb |
2018-08-01 | AJ96147 | 21.0 ppb |
2018-08-01 | AJ96148 | 33.0 ppb |
2018-08-01 | AJ96149 | 47.0 ppb |
2018-08-01 | AJ96150 | 40.0 ppb |
2018-08-01 | AJ96151 | 14.0 ppb |
2018-08-01 | AJ96152 | 44.0 ppb |
2018-11-07 | 4115172-73 | 34.0 ppb |
2018-11-07 | 4115174-5 | 24.0 ppb |
2018-11-07 | 4115176-77 | 14.0 ppb |
2018-11-07 | 4115178-79 | 29.0 ppb |
2018-11-07 | 4115180-81 | 26.0 ppb |
2018-11-07 | 4115182-83 | 33.0 ppb |
2018-11-07 | 4115184-85 | 16.0 ppb |
2018-11-07 | 4115186-87 | 25.0 ppb |
2018-11-07 | 4115188-89 | 27.0 ppb |
2018-11-07 | 4115190-91 | 22.0 ppb |
2018-11-07 | 4115192-93 | 15.0 ppb |
2018-11-07 | 4115194-95 | 20.0 ppb |
2019-02-06 | 4190662-63 | 28.0 ppb |
2019-02-06 | 4190664-65 | 18.0 ppb |
2019-02-06 | 4190666-67 | 11.0 ppb |
2019-02-06 | 4190668-69 | 24.0 ppb |
2019-02-06 | 4190670-71 | 22.0 ppb |
2019-02-06 | 4190672-73 | 27.0 ppb |
2019-02-06 | 4190674-75 | 19.0 ppb |
2019-02-06 | 4190676-77 | 13.0 ppb |
2019-02-06 | 4190680 | 7.50 ppb |
2019-02-06 | 4190682-83 | 19.0 ppb |
2019-02-06 | 4190684-85 | 20.0 ppb |
2019-02-06 | 4196078--79 | 14.0 ppb |
2019-05-08 | 428034-35 | 31.0 ppb |
2019-05-08 | 4288026-27 | 36.0 ppb |
2019-05-08 | 4288028-29 | 18.0 ppb |
2019-05-08 | 4288030-31 | 16.0 ppb |
2019-05-08 | 4288032-33 | 26.0 ppb |
2019-05-08 | 4288034-35 | 31.0 ppb |
2019-05-08 | 4288036-37 | 20.0 ppb |
2019-05-08 | 4288038-39 | 39.0 ppb |
2019-05-08 | 4288040-41 | 35.0 ppb |
2019-05-08 | 4288042-43 | 39.0 ppb |
2019-05-08 | 4288044-45 | 19.0 ppb |
2019-05-08 | 4288046-47 | 38.0 ppb |
2019-05-08 | 4288048-49 | 39.0 ppb |
2019-08-07 | 4378897-98 | 53.0 ppb |
2019-08-07 | 4378899-900 | 38.0 ppb |
2019-08-07 | 4378901-02 | 32.0 ppb |
2019-08-07 | 4378903-04 | 45.0 ppb |
2019-08-07 | 4378905-06 | 50.0 ppb |
2019-08-07 | 4378907-08 | 58.0 ppb |
2019-08-07 | 4378909-10 | 44.0 ppb |
2019-08-07 | 4378911-12 | 26.0 ppb |
2019-08-07 | 4378913-14 | 45.0 ppb |
2019-08-07 | 4378915-16 | 30.0 ppb |
2019-08-07 | 4378917-18 | 57.0 ppb |
2019-08-07 | 4378919-20 | 48.0 ppb |
2019-11-04 | 4475-228-29 | 18.0 ppb |
2019-11-04 | 4475216-17 | 25.0 ppb |
2019-11-04 | 4475218-19 | 29.0 ppb |
2019-11-04 | 4475220-21 | 24.0 ppb |
2019-11-04 | 4475222-23 | 29.0 ppb |
2019-11-04 | 4475224-25 | 22.0 ppb |
2019-11-04 | 4475226-27 | 24.0 ppb |
2019-11-04 | 4475230-31 | 12.0 ppb |
2019-11-04 | 4475232-33 | 32.0 ppb |
2019-11-04 | 4475234-35 | 28.0 ppb |
2019-11-04 | 4475236-37 | 34.0 ppb |
2019-11-04 | 4475238-39 | 35.0 ppb |