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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

Marine Corps Base Hawaii

NOTE: Marine Corps Base Hawaii purchases water from Honolulu-Windward-Pearl Harbor which is required to test for chloroform. Sample information shown below was taken by Honolulu-Windward-Pearl Harbor.

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.

 

126

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015ND80ND
2016ND20ND
2017ND20ND

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

NOTE: Marine Corps Base Hawaii purchases water from Honolulu-Windward-Pearl Harbor which is required to test for chloroform. Sample information shown below was taken by Honolulu-Windward-Pearl Harbor.

Date Lab ID Result
2015-01-06201501080393ND
2015-01-06201501080394ND
2015-01-06201501080400ND
2015-01-06201501080403ND
2015-01-13201501150585ND
2015-02-09201502110395ND
2015-02-10201502120276ND
2015-04-06201504080295ND
2015-04-06201504080296ND
2015-04-08201504100159ND
2015-04-08201504100160ND
2015-04-13201504140137ND
2015-04-20201504210283ND
2015-05-04201505060108ND
2015-05-27201505290083ND
2015-07-07201507080163ND
2015-07-08201507100093ND
2015-07-09201507100111ND
2015-07-09201507100112ND
2015-07-13201507150580ND
2015-07-13201507150581ND
2015-08-18201508200479ND
2015-10-05201510070194ND
2015-10-05201510070196ND
2015-10-06201509160111ND
2015-10-06201509160112ND
2015-10-07201509160110ND
2015-10-19201510140073ND
2015-12-28201512180363ND
2016-01-05ND
2016-01-06ND
2016-01-12ND
2016-01-12ND
2016-01-12ND
2016-02-09ND
2016-04-11ND
2016-04-11ND
2016-04-11ND
2016-04-13ND
2016-04-13ND
2016-04-19ND
2016-05-02ND
2016-05-04ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-06ND
2016-07-11ND
2016-10-03ND
2016-10-04ND
2016-10-05ND
2016-10-14ND
2016-10-14ND
2016-10-28ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-17ND
2017-01-23ND
2017-02-14ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-05ND
2017-04-05ND
2017-04-05ND
2017-04-05ND
2017-04-10ND
2017-04-11ND
2017-04-11ND
2017-04-11ND
2017-04-11ND
2017-04-17ND
2017-04-17ND
2017-04-18ND
2017-04-18ND
2017-04-19ND
2017-04-19ND
2017-04-19ND
2017-04-19ND
2017-04-19ND
2017-04-19ND
2017-04-20ND
2017-05-01ND
2017-05-01ND
2017-05-02ND
2017-05-03ND
2017-05-03ND
2017-05-03ND
2017-05-03ND
2017-05-03ND
2017-05-04ND
2017-05-09ND
2017-05-09ND
2017-05-09ND
2017-05-10ND
2017-05-10ND
2017-05-11ND
2017-05-16ND
2017-05-16ND
2017-05-17ND
2017-05-22ND
2017-05-22ND
2017-05-22ND
2017-05-22ND
2017-05-22ND
2017-05-23ND
2017-05-23ND
2017-05-24ND
2017-05-30ND
2017-06-05ND
2017-06-05ND
2017-06-06ND
2017-06-07ND
2017-06-13ND
2017-07-03ND
2017-07-10ND
2017-07-10ND
2017-07-10ND
2017-07-10ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-05ND