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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Deming Municipal Water System

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.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
20160.00875 ppb161ND - 0.140 ppb
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-03-111403526-001AND
2014-03-111403525-001AND
2014-03-111403523-001AND
2014-03-111403524-001AND
2014-05-211405A19-001AND
2014-05-211405A20-001AND
2014-05-211405A17-001AND
2014-05-211405A18-001AND
2014-07-021407229-001AND
2014-07-021407227-001AND
2014-07-021407223-001AND
2014-07-021407225-001AND
2014-10-131410708-001AND
2014-10-131410640-001AND
2014-10-131410710-001AND
2014-10-131410645-001AND
2015-01-271501959-001AND
2015-01-271501958-001AND
2015-01-271501960-001AND
2015-01-271501957-001AND
2015-04-071504310-001AND
2015-04-071504303-001AND
2015-04-071504304-001AND
2015-04-071504354-001AND
2015-07-212015020957ND
2015-07-212015020958ND
2015-07-212015020960ND
2015-07-212015020959ND
2015-10-202015031700ND
2015-10-202015031701ND
2015-10-202015031699ND
2015-10-202015031698ND
2016-01-122016001211ND
2016-01-122016001210ND
2016-01-122016001213ND
2016-01-122016001212ND
2016-04-052016009727ND
2016-04-052016009729ND
2016-04-052016009728ND
2016-04-052016009730ND
2016-07-122016019987ND
2016-07-122016019986ND
2016-07-122016019985ND
2016-07-122016019984ND
2016-10-2420160309650.140 ppb
2016-10-242016030966ND
2016-10-242016030964ND
2016-10-242016030963ND
2017-01-032017000156ND
2017-01-032017000155ND
2017-01-032017000154ND
2017-01-032017000157ND
2017-04-102017010929ND
2017-04-102017010932ND
2017-04-102017010931ND
2017-04-102017010930ND
2017-07-122017020134ND
2017-07-122017020135ND
2017-07-122017020136ND
2017-07-122017020137ND
2017-10-092017029088ND
2017-10-092017029091ND
2017-10-092017029090ND
2017-10-092017029089ND
2018-01-022018000142ND
2018-01-022018000141ND
2018-01-022018000140ND
2018-01-022018000139ND
2018-04-042018009704ND
2018-04-042018009701ND
2018-04-042018009702ND
2018-04-042018009703ND
2018-07-102018018736ND
2018-07-102018018735ND
2018-07-102018018734ND
2018-07-102018018733ND
2018-10-162018029562ND
2018-10-162018029563ND
2018-10-162018029564ND
2018-10-162018029565ND
2019-01-082019000597ND
2019-01-082019000598ND
2019-01-082019000599ND
2019-01-082019000600ND
2019-04-092019008972ND
2019-04-092019008975ND
2019-04-092019008974ND
2019-04-092019008973ND
2019-07-162019019611ND
2019-07-162019019613ND
2019-07-162019019612ND
2019-07-162019019610ND
2019-10-162019030205ND
2019-10-162019030204ND
2019-10-162019030203ND
2019-10-162019030202ND