Chloroform
Pompton Lakes Mua
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.177 ppb | 16 | 5 | ND - 0.680 ppb |
| 2015 | 0.497 ppb | 17 | 9 | ND - 1.64 ppb |
| 2016 | 0.524 ppb | 16 | 10 | ND - 1.46 ppb |
| 2017 | 0.311 ppb | 17 | 9 | ND - 1.30 ppb |
| 2018 | 2.37 ppb | 17 | 10 | ND - 33.6 ppb |
| 2019 | 0.437 ppb | 17 | 12 | ND - 1.45 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 | 1070897004 | ND |
| 2014-02-04 | 1070897002 | ND |
| 2014-02-04 | 1070897003 | ND |
| 2014-02-04 | 1070897001 | ND |
| 2014-05-20 | 2008151001 | ND |
| 2014-05-20 | 2008151003 | ND |
| 2014-05-20 | 2008151002 | ND |
| 2014-05-20 | 2008151004 | ND |
| 2014-08-05 | 4080159-02 | 0.330 ppb |
| 2014-08-05 | 4080159-04 | 0.680 ppb |
| 2014-08-05 | 4080159-01 | ND |
| 2014-08-05 | 4080159-03 | ND |
| 2014-11-04 | 4110130-01 | 0.649 ppb |
| 2014-11-04 | 4110130-03 | 0.545 ppb |
| 2014-11-04 | 4110130-04 | ND |
| 2014-11-04 | 4110130-02 | 0.621 ppb |
| 2015-02-03 | 5020065-02 | ND |
| 2015-02-03 | 5020065-03 | 1.01 ppb |
| 2015-02-03 | 5020065-04 | ND |
| 2015-02-03 | 5020065-01 | 0.422 ppb |
| 2015-04-08 | 5040203-02 | 0.937 ppb |
| 2015-05-05 | 5050170-04 | 1.64 ppb |
| 2015-05-05 | 5050170-01 | ND |
| 2015-05-05 | 5050170-02 | 1.02 ppb |
| 2015-05-05 | 5050170-03 | ND |
| 2015-08-04 | 5080114-04 | 0.896 ppb |
| 2015-08-04 | 5080114-01 | ND |
| 2015-08-04 | 5080114-02 | 1.23 ppb |
| 2015-08-04 | 5080114-03 | ND |
| 2015-11-03 | 5110098-01 | ND |
| 2015-11-03 | 5110098-02 | 0.898 ppb |
| 2015-11-03 | 5110098-03 | ND |
| 2015-11-03 | 5110098-04 | 0.388 ppb |
| 2016-02-02 | 6020103-01 | ND |
| 2016-02-02 | 6020103-03 | ND |
| 2016-02-02 | 6020103-04 | 1.46 ppb |
| 2016-02-02 | 6020103-02 | 0.896 ppb |
| 2016-05-03 | 6050132-01 | ND |
| 2016-05-03 | 6050132-03 | ND |
| 2016-05-03 | 6050132-04 | 0.945 ppb |
| 2016-05-03 | 6050132-02 | 1.14 ppb |
| 2016-08-02 | 6080120-01 | 0.388 ppb |
| 2016-08-02 | 6080120-03 | 0.275 ppb |
| 2016-08-02 | 6080120-04 | 1.19 ppb |
| 2016-08-02 | 6080120-02 | 1.11 ppb |
| 2016-11-01 | 6110078-02 | 0.388 ppb |
| 2016-11-01 | 6110078-01 | ND |
| 2016-11-01 | 6110078-03 | ND |
| 2016-11-01 | 6110078-04 | 0.593 ppb |
| 2017-02-07 | 7020247-03 | ND |
| 2017-02-07 | 7020247-01 | ND |
| 2017-02-07 | 7020247-02 | 0.358 ppb |
| 2017-02-07 | 7020247-04 | 0.577 ppb |
| 2017-04-11 | 7040339-02 | 0.301 ppb |
| 2017-05-02 | 7050134-04 | 0.332 ppb |
| 2017-05-02 | 7050134-03 | ND |
| 2017-05-02 | 7050134-01 | ND |
| 2017-05-02 | 7050134-02 | 0.348 ppb |
| 2017-08-01 | 7080098-04 | 1.30 ppb |
| 2017-08-01 | 7080098-03 | ND |
| 2017-08-01 | 7080098-01 | ND |
| 2017-08-01 | 7080098-02 | 0.861 ppb |
| 2017-11-07 | 7110301-04 | 0.652 ppb |
| 2017-11-07 | 7110301-03 | ND |
| 2017-11-07 | 7110301-01 | ND |
| 2017-11-07 | 7110301-02 | 0.562 ppb |
| 2018-02-06 | 8020165-04 | 0.926 ppb |
| 2018-02-06 | 8020165-03 | ND |
| 2018-02-06 | 8020165-02 | 0.931 ppb |
| 2018-02-06 | 8020165-01 | ND |
| 2018-04-04 | 8040152-01 | 0.780 ppb |
| 2018-05-01 | 8050094-04 | 0.868 ppb |
| 2018-05-01 | 8050094-03 | ND |
| 2018-05-01 | 8050094-02 | 0.439 ppb |
| 2018-05-01 | 8050094-01 | ND |
| 2018-08-07 | 8080339-03 | ND |
| 2018-08-07 | 8080339-02 | ND |
| 2018-08-07 | 8080339-01 | ND |
| 2018-08-07 | 8080339-04 | 1.44 ppb |
| 2018-11-06 | 8110257-01 | 0.257 ppb |
| 2018-11-06 | 8110257-03 | 0.422 ppb |
| 2018-11-06 | 8110257-02 | 33.6 ppb |
| 2018-11-06 | 8110257-04 | 0.693 ppb |
| 2019-02-05 | 9020182-01 | ND |
| 2019-02-05 | 9020182-03 | ND |
| 2019-02-05 | 9020182-04 | 0.372 ppb |
| 2019-02-05 | 9020182-02 | 0.400 ppb |
| 2019-04-03 | 9040179-01 | 0.264 ppb |
| 2019-05-07 | 9050362-02 | 0.750 ppb |
| 2019-05-07 | 9050362-01 | ND |
| 2019-05-07 | 9050362-03 | 0.295 ppb |
| 2019-05-07 | 9050362-04 | 1.45 ppb |
| 2019-08-06 | 9080300-01 | 0.280 ppb |
| 2019-08-06 | 9080300-02 | 0.958 ppb |
| 2019-08-06 | 9080300-03 | 0.290 ppb |
| 2019-08-06 | 9080300-04 | 0.995 ppb |
| 2019-11-05 | 9110248-01 | ND |
| 2019-11-05 | 9110248-04 | 0.735 ppb |
| 2019-11-05 | 9110248-02 | 0.645 ppb |
| 2019-11-05 | 9110248-03 | ND |