Chloroform
Atlanta
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 | 32.6 ppb | 50 | 50 | 11.0 ppb - 94.0 ppb |
2015 | 26.6 ppb | 50 | 50 | 11.0 ppb - 53.0 ppb |
2016 | 32.8 ppb | 50 | 50 | 13.0 ppb - 88.0 ppb |
2017 | 41.1 ppb | 50 | 50 | 17.0 ppb - 96.0 ppb |
2018 | 37.6 ppb | 50 | 50 | 11.0 ppb - 92.0 ppb |
2019 | 33.0 ppb | 50 | 50 | 17.0 ppb - 68.0 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 |
---|---|---|
2014-01-28 | AI27263 | 31.0 ppb |
2014-01-28 | AI27264 | 14.0 ppb |
2014-01-28 | AI27265 | 14.0 ppb |
2014-01-28 | AI27266 | 48.0 ppb |
2014-01-28 | AI27267 | 27.0 ppb |
2014-01-28 | AI27268 | 14.0 ppb |
2014-01-28 | AI27269 | 16.0 ppb |
2014-01-28 | AI27270 | 12.0 ppb |
2014-01-28 | AI27271 | 18.0 ppb |
2014-01-28 | AI27272 | 15.0 ppb |
2014-01-28 | AI27273 | 11.0 ppb |
2014-01-28 | AI27274 | 21.0 ppb |
2014-03-12 | AI36003 | 18.0 ppb |
2014-03-12 | AI36004 | 19.0 ppb |
2014-04-28 | AI38963 | 26.0 ppb |
2014-04-28 | AI38966 | 26.0 ppb |
2014-04-28 | AI38967 | 30.0 ppb |
2014-04-28 | AI38968 | 28.0 ppb |
2014-04-28 | AI38969 | 28.0 ppb |
2014-04-28 | AI38971 | 25.0 ppb |
2014-04-28 | AI38972 | 34.0 ppb |
2014-04-29 | AI38961 | 80.0 ppb |
2014-04-29 | AI38962 | 33.0 ppb |
2014-04-29 | AI38964 | 54.0 ppb |
2014-04-29 | AI38965 | 43.0 ppb |
2014-04-29 | AI38970 | 31.0 ppb |
2014-07-29 | AI47515 | 37.0 ppb |
2014-07-29 | AI47519 | 33.0 ppb |
2014-07-29 | AI47520 | 41.0 ppb |
2014-07-29 | AI47521 | 43.0 ppb |
2014-07-29 | AI47523 | 29.0 ppb |
2014-07-29 | AI47524 | 38.0 ppb |
2014-07-30 | AI47513 | 56.0 ppb |
2014-07-30 | AI47514 | 42.0 ppb |
2014-07-30 | AI47516 | 94.0 ppb |
2014-07-30 | AI47517 | 49.0 ppb |
2014-07-30 | AI47518 | 36.0 ppb |
2014-07-30 | AI47522 | 43.0 ppb |
2014-10-28 | AI58653 | 25.0 ppb |
2014-10-28 | AI58657 | 27.0 ppb |
2014-10-28 | AI58658 | 26.0 ppb |
2014-10-28 | AI58659 | 30.0 ppb |
2014-10-28 | AI58661 | 25.0 ppb |
2014-10-28 | AI58662 | 29.0 ppb |
2014-10-29 | AI58651 | 46.0 ppb |
2014-10-29 | AI58652 | 28.0 ppb |
2014-10-29 | AI58654 | 38.0 ppb |
2014-10-29 | AI58655 | 49.0 ppb |
2014-10-29 | AI58656 | 25.0 ppb |
2014-10-29 | AI58660 | 27.0 ppb |
2015-01-28 | AI63769 | 16.0 ppb |
2015-01-28 | AI63773 | 16.0 ppb |
2015-01-28 | AI63774 | 17.0 ppb |
2015-01-28 | AI63775 | 23.0 ppb |
2015-01-28 | AI63777 | 15.0 ppb |
2015-01-28 | AI63778 | 30.0 ppb |
2015-01-29 | AI63767 | 29.0 ppb |
2015-01-29 | AI63768 | 17.0 ppb |
2015-01-29 | AI63770 | 37.0 ppb |
2015-01-29 | AI63771 | 28.0 ppb |
2015-01-29 | AI63772 | 17.0 ppb |
2015-01-29 | AI63776 | 15.0 ppb |
2015-03-02 | AI65773 | 11.0 ppb |
2015-03-02 | AI65774 | 11.0 ppb |
2015-04-27 | AI75871 | 26.0 ppb |
2015-04-27 | AI75872 | 31.0 ppb |
2015-04-27 | AI75875 | 29.0 ppb |
2015-04-27 | AI75876 | 26.0 ppb |
2015-04-27 | AI75877 | 27.0 ppb |
2015-04-27 | AI75878 | 25.0 ppb |
2015-04-27 | AI75880 | 27.0 ppb |
2015-04-27 | AI75881 | 29.0 ppb |
2015-04-28 | AI75870 | 45.0 ppb |
2015-04-28 | AI75873 | 38.0 ppb |
2015-04-28 | AI75874 | 43.0 ppb |
2015-04-28 | AI75879 | 27.0 ppb |
2015-07-29 | AI84860 | 31.0 ppb |
2015-07-29 | AI84864 | 28.0 ppb |
2015-07-29 | AI84865 | 29.0 ppb |
2015-07-29 | AI84866 | 22.0 ppb |
2015-07-29 | AI84868 | 18.0 ppb |
2015-07-29 | AI84869 | 32.0 ppb |
2015-07-30 | AI84858 | 53.0 ppb |
2015-07-30 | AI84859 | 30.0 ppb |
2015-07-30 | AI84861 | 47.0 ppb |
2015-07-30 | AI84862 | 39.0 ppb |
2015-07-30 | AI84863 | 24.0 ppb |
2015-07-30 | AI84867 | 28.0 ppb |
2015-10-28 | AJ00021 | 19.0 ppb |
2015-10-28 | AJ00025 | 14.0 ppb |
2015-10-28 | AJ00026 | 21.0 ppb |
2015-10-28 | AJ00027 | 23.0 ppb |
2015-10-28 | AJ00030 | 27.0 ppb |
2015-10-29 | AJ00019 | 40.0 ppb |
2015-10-29 | AJ00020 | 25.0 ppb |
2015-10-29 | AJ00022 | 38.0 ppb |
2015-10-29 | AJ00023 | 37.0 ppb |
2015-10-29 | AJ00024 | 19.0 ppb |
2015-10-29 | AJ00028 | 17.0 ppb |
2015-10-29 | AJ00029 | 16.0 ppb |
2016-01-27 | AJ05298 | 18.0 ppb |
2016-01-27 | AJ05302 | 15.0 ppb |
2016-01-27 | AJ05303 | 16.0 ppb |
2016-01-27 | AJ05304 | 17.0 ppb |
2016-01-27 | AJ05306 | 14.0 ppb |
2016-01-27 | AJ05307 | 27.0 ppb |
2016-01-28 | AJ05296 | 54.0 ppb |
2016-01-28 | AJ05297 | 17.0 ppb |
2016-01-28 | AJ05299 | 36.0 ppb |
2016-01-28 | AJ05300 | 24.0 ppb |
2016-01-28 | AJ05301 | 13.0 ppb |
2016-01-28 | AJ05305 | 17.0 ppb |
2016-03-11 | AJ08062 | 15.0 ppb |
2016-03-11 | AJ08063 | 15.0 ppb |
2016-04-27 | AJ11091 | 45.0 ppb |
2016-04-27 | AJ11092 | 31.0 ppb |
2016-04-27 | AJ11093 | 27.0 ppb |
2016-04-27 | AJ11094 | 46.0 ppb |
2016-04-27 | AJ11095 | 37.0 ppb |
2016-04-27 | AJ11096 | 21.0 ppb |
2016-04-27 | AJ11097 | 25.0 ppb |
2016-04-27 | AJ11100 | 26.0 ppb |
2016-04-28 | AJ11098 | 23.0 ppb |
2016-04-28 | AJ11099 | 24.0 ppb |
2016-04-28 | AJ11101 | 22.0 ppb |
2016-04-28 | AJ11102 | 40.0 ppb |
2016-07-27 | AJ20317 | 47.0 ppb |
2016-07-27 | AJ20318 | 45.0 ppb |
2016-07-27 | AJ20319 | 45.0 ppb |
2016-07-27 | AJ20321 | 35.0 ppb |
2016-07-27 | AJ20322 | 32.0 ppb |
2016-07-28 | AJ20311 | 76.0 ppb |
2016-07-28 | AJ20312 | 58.0 ppb |
2016-07-28 | AJ20313 | 58.0 ppb |
2016-07-28 | AJ20314 | 88.0 ppb |
2016-07-28 | AJ20315 | 69.0 ppb |
2016-07-28 | AJ20316 | 27.0 ppb |
2016-07-28 | AJ20320 | 49.0 ppb |
2016-10-28 | AJ32340 | 53.0 ppb |
2016-10-28 | AJ32341 | 23.0 ppb |
2016-10-28 | AJ32342 | 21.0 ppb |
2016-10-28 | AJ32343 | 61.0 ppb |
2016-10-28 | AJ32344 | 41.0 ppb |
2016-10-28 | AJ32345 | 16.0 ppb |
2016-10-28 | AJ32346 | 26.0 ppb |
2016-10-28 | AJ32347 | 18.0 ppb |
2016-10-28 | AJ32348 | 25.0 ppb |
2016-10-28 | AJ32349 | 21.0 ppb |
2016-10-28 | AJ32350 | 16.0 ppb |
2016-10-28 | AJ32351 | 24.0 ppb |
2017-01-25 | AJ43644 | 21.0 ppb |
2017-01-25 | AJ43648 | 23.0 ppb |
2017-01-25 | AJ43649 | 28.0 ppb |
2017-01-25 | AJ43650 | 43.0 ppb |
2017-01-25 | AJ43652 | 24.0 ppb |
2017-01-25 | AJ43653 | 27.0 ppb |
2017-01-26 | AJ43642 | 35.0 ppb |
2017-01-26 | AJ43643 | 31.0 ppb |
2017-01-26 | AJ43645 | 37.0 ppb |
2017-01-26 | AJ43646 | 26.0 ppb |
2017-01-26 | AJ43647 | 30.0 ppb |
2017-01-26 | AJ43651 | 22.0 ppb |
2017-04-26 | AJ54170 | 45.0 ppb |
2017-04-26 | AJ54171 | 34.0 ppb |
2017-04-26 | AJ54175 | 32.0 ppb |
2017-04-26 | AJ54176 | 42.0 ppb |
2017-04-26 | AJ54177 | 43.0 ppb |
2017-04-26 | AJ54178 | 35.0 ppb |
2017-04-26 | AJ54179 | 38.0 ppb |
2017-04-26 | AJ54180 | 43.0 ppb |
2017-04-27 | AJ54169 | 76.0 ppb |
2017-04-27 | AJ54172 | 55.0 ppb |
2017-04-27 | AJ54173 | 46.0 ppb |
2017-04-27 | AJ54174 | 38.0 ppb |
2017-05-11 | AJ55267 | 30.0 ppb |
2017-05-11 | AJ55268 | 37.0 ppb |
2017-07-24 | AJ61961 | 27.0 ppb |
2017-07-24 | AJ61962 | 66.0 ppb |
2017-07-24 | AJ61965 | 38.0 ppb |
2017-07-24 | AJ61966 | 58.0 ppb |
2017-07-24 | AJ61967 | 41.0 ppb |
2017-07-24 | AJ61968 | 51.0 ppb |
2017-07-24 | AJ61969 | 59.0 ppb |
2017-07-24 | AJ61970 | 26.0 ppb |
2017-07-24 | AJ61971 | 77.0 ppb |
2017-07-28 | AJ61960 | 96.0 ppb |
2017-07-28 | AJ61963 | 84.0 ppb |
2017-07-28 | AJ61964 | 79.0 ppb |
2017-10-30 | AJ72968 | 30.0 ppb |
2017-10-30 | AJ72971 | 25.0 ppb |
2017-10-30 | AJ72972 | 28.0 ppb |
2017-10-30 | AJ72973 | 24.0 ppb |
2017-10-30 | AJ72974 | 43.0 ppb |
2017-10-30 | AJ72975 | 33.0 ppb |
2017-10-30 | AJ72976 | 17.0 ppb |
2017-10-30 | AJ72977 | 38.0 ppb |
2017-10-31 | AJ72966 | 63.0 ppb |
2017-10-31 | AJ72967 | 25.0 ppb |
2017-10-31 | AJ72969 | 42.0 ppb |
2017-10-31 | AJ72970 | 45.0 ppb |
2018-01-30 | AJ80288 | 13.0 ppb |
2018-01-30 | AJ80292 | 11.0 ppb |
2018-01-30 | AJ80293 | 14.0 ppb |
2018-01-30 | AJ80294 | 18.0 ppb |
2018-01-30 | AJ80296 | 16.0 ppb |
2018-01-30 | AJ80297 | 17.0 ppb |
2018-01-31 | AJ80286 | 24.0 ppb |
2018-01-31 | AJ80287 | 20.0 ppb |
2018-01-31 | AJ80289 | 19.0 ppb |
2018-01-31 | AJ80290 | 15.0 ppb |
2018-01-31 | AJ80291 | 18.0 ppb |
2018-01-31 | AJ80295 | 13.0 ppb |
2018-02-22 | AJ84391 | 26.0 ppb |
2018-02-22 | AJ84392 | 19.0 ppb |
2018-04-25 | AJ88159 | 43.0 ppb |
2018-04-25 | AJ88160 | 41.0 ppb |
2018-04-25 | AJ88161 | 27.0 ppb |
2018-04-25 | AJ88162 | 32.0 ppb |
2018-04-25 | AJ88163 | 32.0 ppb |
2018-04-25 | AJ88164 | 36.0 ppb |
2018-04-25 | AJ88165 | 24.0 ppb |
2018-04-25 | AJ88166 | 30.0 ppb |
2018-04-25 | AJ88167 | 37.0 ppb |
2018-04-25 | AJ88168 | 28.0 ppb |
2018-04-25 | AJ88169 | 33.0 ppb |
2018-04-25 | AJ88170 | 35.0 ppb |
2018-07-25 | AJ95428 | 84.0 ppb |
2018-07-25 | AJ95429 | 80.0 ppb |
2018-07-25 | AJ95430 | 40.0 ppb |
2018-07-25 | AJ95431 | 80.0 ppb |
2018-07-25 | AJ95432 | 68.0 ppb |
2018-07-25 | AJ95433 | 61.0 ppb |
2018-07-25 | AJ95434 | 52.0 ppb |
2018-07-25 | AJ95435 | 68.0 ppb |
2018-07-25 | AJ95436 | 84.0 ppb |
2018-07-25 | AJ95437 | 55.0 ppb |
2018-07-25 | AJ95438 | 53.0 ppb |
2018-07-25 | AJ95439 | 92.0 ppb |
2018-10-23 | AK04682 | 55.0 ppb |
2018-10-23 | AK04683 | 34.0 ppb |
2018-10-23 | AK04684 | 27.0 ppb |
2018-10-23 | AK04685 | 60.0 ppb |
2018-10-23 | AK04686 | 43.0 ppb |
2018-10-23 | AK04687 | 27.0 ppb |
2018-10-23 | AK04688 | 25.0 ppb |
2018-10-23 | AK04689 | 30.0 ppb |
2018-10-23 | AK04690 | 32.0 ppb |
2018-10-23 | AK04691 | 30.0 ppb |
2018-10-23 | AK04692 | 24.0 ppb |
2018-10-23 | AK04693 | 36.0 ppb |
2019-01-22 | AK09819 | 27.0 ppb |
2019-01-22 | AK09820 | 23.0 ppb |
2019-01-22 | AK09821 | 22.0 ppb |
2019-01-22 | AK09822 | 26.0 ppb |
2019-01-22 | AK09823 | 21.0 ppb |
2019-01-22 | AK09824 | 22.0 ppb |
2019-01-22 | AK09825 | 17.0 ppb |
2019-01-22 | AK09826 | 22.0 ppb |
2019-01-22 | AK09827 | 23.0 ppb |
2019-01-22 | AK09828 | 18.0 ppb |
2019-01-22 | AK09829 | 19.0 ppb |
2019-01-22 | AK09830 | 26.0 ppb |
2019-04-24 | AK15824 | 68.0 ppb |
2019-04-24 | AK15825 | 35.0 ppb |
2019-04-24 | AK15826 | 38.0 ppb |
2019-04-24 | AK15827 | 61.0 ppb |
2019-04-24 | AK15828 | 40.0 ppb |
2019-04-24 | AK15829 | 34.0 ppb |
2019-04-24 | AK15830 | 35.0 ppb |
2019-04-24 | AK15831 | 35.0 ppb |
2019-04-24 | AK15832 | 51.0 ppb |
2019-04-24 | AK15833 | 40.0 ppb |
2019-04-24 | AK15834 | 29.0 ppb |
2019-04-24 | AK15835 | 59.0 ppb |
2019-04-25 | AK15836 | 31.0 ppb |
2019-04-25 | AK15837 | 18.0 ppb |
2019-07-24 | AK23583 | 18.0 ppb |
2019-07-24 | AK23584 | 26.0 ppb |
2019-07-24 | AK23585 | 49.0 ppb |
2019-07-24 | AK23587 | 26.0 ppb |
2019-07-24 | AK23588 | 46.0 ppb |
2019-07-24 | AK23591 | 38.0 ppb |
2019-07-25 | AK23586 | 23.0 ppb |
2019-07-25 | AK23589 | 51.0 ppb |
2019-07-25 | AK23590 | 30.0 ppb |
2019-07-25 | AK23592 | 44.0 ppb |
2019-07-25 | AK23593 | 39.0 ppb |
2019-07-25 | AK23594 | 29.0 ppb |
2019-10-21 | AK35547 | 64.0 ppb |
2019-10-21 | AK35548 | 26.0 ppb |
2019-10-21 | AK35550 | 36.0 ppb |
2019-10-21 | AK35551 | 39.0 ppb |
2019-10-21 | AK35552 | 32.0 ppb |
2019-10-21 | AK35556 | 25.0 ppb |
2019-10-22 | AK35549 | 30.0 ppb |
2019-10-22 | AK35553 | 22.0 ppb |
2019-10-22 | AK35554 | 25.0 ppb |
2019-10-22 | AK35555 | 27.0 ppb |
2019-10-22 | AK35557 | 21.0 ppb |
2019-10-22 | AK35558 | 42.0 ppb |