Chloroform
North Las Vegas Utilities
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 |
---|---|---|---|---|
2014 | 25.2 ppb | 48 | 48 | 12.0 ppb - 39.0 ppb |
2015 | 23.4 ppb | 48 | 48 | 5.20 ppb - 32.0 ppb |
2016 | 23.0 ppb | 49 | 49 | 13.3 ppb - 33.0 ppb |
2017 | 20.5 ppb | 49 | 49 | 8.10 ppb - 31.1 ppb |
2018 | 20.6 ppb | 48 | 48 | 6.00 ppb - 29.5 ppb |
2019 | 20.0 ppb | 48 | 48 | 4.00 ppb - 29.6 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 |
---|---|---|
2014-01-02 | 13120438-001 | 19.0 ppb |
2014-01-02 | 13120438-002 | 29.0 ppb |
2014-01-02 | 13120438-003 | 29.0 ppb |
2014-01-02 | 13120438-004 | 28.0 ppb |
2014-01-02 | 13120438-005 | 26.0 ppb |
2014-01-02 | 13120438-006 | 24.0 ppb |
2014-01-02 | 13120438-007 | 27.0 ppb |
2014-01-02 | 13120438-008 | 27.0 ppb |
2014-01-02 | 13120438-009 | 29.0 ppb |
2014-01-02 | 13120438-010 | 30.0 ppb |
2014-01-02 | 13120438-011 | 19.0 ppb |
2014-01-02 | 13120438-012 | 25.0 ppb |
2014-04-03 | 14040024-001 | 17.0 ppb |
2014-04-03 | 14040024-002 | 21.0 ppb |
2014-04-03 | 14040024-003 | 23.0 ppb |
2014-04-03 | 14040024-004 | 25.0 ppb |
2014-04-03 | 14040024-005 | 12.0 ppb |
2014-04-03 | 14040024-006 | 24.0 ppb |
2014-04-03 | 14040024-007 | 27.0 ppb |
2014-04-03 | 14040024-008 | 24.0 ppb |
2014-04-03 | 14040024-009 | 26.0 ppb |
2014-04-03 | 14040024-010 | 31.0 ppb |
2014-04-03 | 14040024-011 | 15.0 ppb |
2014-04-03 | 14040024-012 | 24.0 ppb |
2014-07-02 | 14070012-011 | 22.0 ppb |
2014-07-02 | 14070012-012 | 30.0 ppb |
2014-07-29 | 14070501-001 | 17.0 ppb |
2014-07-29 | 14070501-002 | 24.0 ppb |
2014-07-29 | 14070501-003 | 22.0 ppb |
2014-07-29 | 14070501-004 | 19.0 ppb |
2014-07-29 | 14070501-005 | 24.0 ppb |
2014-07-29 | 14070501-006 | 32.0 ppb |
2014-07-29 | 14070501-007 | 30.0 ppb |
2014-07-29 | 14070501-008 | 21.0 ppb |
2014-07-29 | 14070501-009 | 31.0 ppb |
2014-07-29 | 14070501-010 | 35.0 ppb |
2014-10-06 | 14100027-001 | 28.0 ppb |
2014-10-06 | 14100027-002 | 22.0 ppb |
2014-10-06 | 14100027-003 | 26.0 ppb |
2014-10-06 | 14100027-004 | 35.0 ppb |
2014-10-06 | 14100027-005 | 12.0 ppb |
2014-10-06 | 14100027-006 | 27.0 ppb |
2014-10-06 | 14100027-007 | 29.0 ppb |
2014-10-06 | 14100027-008 | 24.0 ppb |
2014-10-06 | 14100027-009 | 39.0 ppb |
2014-10-06 | 14100027-010 | 33.0 ppb |
2014-10-06 | 14100027-011 | 24.0 ppb |
2014-10-06 | 14100027-012 | 23.0 ppb |
2015-01-05 | 14120535-001 | 32.0 ppb |
2015-01-05 | 14120535-002 | 21.0 ppb |
2015-01-05 | 14120535-003 | 29.0 ppb |
2015-01-05 | 14120535-004 | 32.0 ppb |
2015-01-05 | 14120535-005 | 5.20 ppb |
2015-01-05 | 14120535-006 | 25.0 ppb |
2015-01-05 | 14120535-007 | 25.0 ppb |
2015-01-05 | 14120535-008 | 29.0 ppb |
2015-01-05 | 14120535-009 | 31.0 ppb |
2015-01-05 | 14120535-010 | 29.0 ppb |
2015-01-05 | 14120535-011 | 29.0 ppb |
2015-01-05 | 14120535-012 | 27.0 ppb |
2015-04-02 | 15040020-001 | 24.0 ppb |
2015-04-02 | 15040020-002 | 24.0 ppb |
2015-04-02 | 15040020-003 | 25.0 ppb |
2015-04-02 | 15040020-004 | 23.0 ppb |
2015-04-02 | 15040020-005 | 12.0 ppb |
2015-04-02 | 15040020-006 | 26.0 ppb |
2015-04-02 | 15040020-007 | 22.0 ppb |
2015-04-02 | 15040020-008 | 19.0 ppb |
2015-04-02 | 15040020-009 | 23.0 ppb |
2015-04-02 | 15040020-010 | 23.0 ppb |
2015-04-02 | 15040020-011 | 22.0 ppb |
2015-04-02 | 15040020-012 | 19.0 ppb |
2015-07-02 | 15070002-001 | 24.0 ppb |
2015-07-02 | 15070002-002 | 26.0 ppb |
2015-07-02 | 15070002-003 | 17.0 ppb |
2015-07-02 | 15070002-004 | 27.0 ppb |
2015-07-02 | 15070002-005 | 8.80 ppb |
2015-07-02 | 15070002-006 | 28.0 ppb |
2015-07-02 | 15070002-007 | 29.0 ppb |
2015-07-02 | 15070002-008 | 22.0 ppb |
2015-07-02 | 15070002-009 | 22.0 ppb |
2015-07-02 | 15070002-010 | 24.0 ppb |
2015-07-02 | 15070002-011 | 20.0 ppb |
2015-07-02 | 15070002-012 | 28.0 ppb |
2015-10-01 | 15090548-001 | 19.0 ppb |
2015-10-01 | 15090548-002 | 25.0 ppb |
2015-10-01 | 15090548-003 | 29.0 ppb |
2015-10-01 | 15090548-004 | 26.0 ppb |
2015-10-01 | 15090548-005 | 8.50 ppb |
2015-10-01 | 15090548-006 | 21.0 ppb |
2015-10-01 | 15090548-007 | 28.0 ppb |
2015-10-01 | 15090548-008 | 17.0 ppb |
2015-10-01 | 15090548-009 | 19.0 ppb |
2015-10-01 | 15090548-010 | 24.0 ppb |
2015-10-01 | 15090548-011 | 28.0 ppb |
2015-10-01 | 15090548-012 | 29.0 ppb |
2016-01-07 | 16010043-001 | 32.0 ppb |
2016-01-07 | 16010043-002 | 33.0 ppb |
2016-01-07 | 16010043-003 | 26.0 ppb |
2016-01-07 | 16010043-004 | 27.0 ppb |
2016-01-07 | 16010043-005 | 27.0 ppb |
2016-01-07 | 16010043-006 | 23.0 ppb |
2016-01-07 | 16010043-007 | 27.0 ppb |
2016-01-07 | 16010043-008 | 21.0 ppb |
2016-01-07 | 16010043-009 | 27.0 ppb |
2016-01-07 | 16010043-010 | 27.0 ppb |
2016-01-07 | 16010043-011 | 23.0 ppb |
2016-01-07 | 16010043-012 | 27.0 ppb |
2016-04-04 | 16030493-001 | 19.0 ppb |
2016-04-04 | 16030493-002 | 28.0 ppb |
2016-04-04 | 16030493-003 | 26.0 ppb |
2016-04-04 | 16030493-004 | 25.0 ppb |
2016-04-04 | 16030493-005 | 23.0 ppb |
2016-04-04 | 16030493-006 | 21.0 ppb |
2016-04-04 | 16030493-007 | 25.0 ppb |
2016-04-04 | 16030493-008 | 21.0 ppb |
2016-04-04 | 16030493-009 | 21.0 ppb |
2016-04-04 | 16030493-010 | 31.0 ppb |
2016-04-04 | 16030493-011 | 21.0 ppb |
2016-04-04 | 16030493-012 | 26.0 ppb |
2016-07-07 | S1602476001 | 26.5 ppb |
2016-07-07 | S1602476002 | 25.9 ppb |
2016-07-07 | S1602476003 | 28.3 ppb |
2016-07-07 | S1602476004 | 26.7 ppb |
2016-07-07 | S1602476005 | 18.8 ppb |
2016-07-07 | S1602476006 | 18.9 ppb |
2016-07-07 | S1602476007 | 24.4 ppb |
2016-07-07 | S1602476008 | 13.3 ppb |
2016-07-07 | S1602476009 | 14.8 ppb |
2016-07-07 | S1602476010 | 23.7 ppb |
2016-07-07 | S1603155011 | 16.0 ppb |
2016-07-07 | S1603155012 | 23.7 ppb |
2016-10-06 | S103731002 | 26.0 ppb |
2016-10-06 | S1603731001 | 19.2 ppb |
2016-10-06 | S1603731002 | 26.0 ppb |
2016-10-06 | S1603731003 | 26.7 ppb |
2016-10-06 | S1603731004 | 24.1 ppb |
2016-10-06 | S1603731005 | 14.4 ppb |
2016-10-06 | S1603731006 | 15.9 ppb |
2016-10-06 | S1603731007 | 21.5 ppb |
2016-10-06 | S1603731008 | 14.1 ppb |
2016-10-06 | S1603731009 | 14.6 ppb |
2016-10-06 | S1603731010 | 17.5 ppb |
2016-10-06 | S1603731011 | 20.6 ppb |
2016-10-06 | S1603731012 | 20.7 ppb |
2017-01-05 | S1605416001 | 20.6 ppb |
2017-01-05 | S1605416002 | 27.9 ppb |
2017-01-05 | S1605416003 | 27.1 ppb |
2017-01-05 | S1605416004 | 21.5 ppb |
2017-01-05 | S1605416005 | 8.10 ppb |
2017-01-05 | S1605416006 | 19.6 ppb |
2017-01-05 | S1605416007 | 17.2 ppb |
2017-01-05 | S1605416008 | 17.6 ppb |
2017-01-05 | S1605416009 | 17.1 ppb |
2017-01-05 | S1605416010 | 23.2 ppb |
2017-01-05 | S1605416011 | 17.7 ppb |
2017-01-05 | S1605416012 | 19.9 ppb |
2017-01-05 | S165416012 | 19.9 ppb |
2017-04-06 | S1700122001 | 25.6 ppb |
2017-04-06 | S1700122002 | 22.7 ppb |
2017-04-06 | S1700122003 | 24.7 ppb |
2017-04-06 | S1700122004 | 23.6 ppb |
2017-04-06 | S1700122005 | 19.2 ppb |
2017-04-06 | S1700122006 | 18.9 ppb |
2017-04-06 | S1700122007 | 21.2 ppb |
2017-04-06 | S1700122008 | 13.1 ppb |
2017-04-06 | S1700122009 | 14.7 ppb |
2017-04-06 | S1700122010 | 26.0 ppb |
2017-04-06 | S1700122011 | 18.6 ppb |
2017-04-06 | S1700122012 | 22.3 ppb |
2017-07-06 | S1702255001 | 17.0 ppb |
2017-07-06 | S1702255002 | 20.0 ppb |
2017-07-06 | S1702255003 | 27.0 ppb |
2017-07-06 | S1702255004 | 25.9 ppb |
2017-07-06 | S1702255005 | 19.1 ppb |
2017-07-06 | S1702255006 | 18.3 ppb |
2017-07-06 | S1702255007 | 26.6 ppb |
2017-07-06 | S1702255008 | 15.9 ppb |
2017-07-06 | S1702255009 | 16.3 ppb |
2017-07-06 | S1702255010 | 28.5 ppb |
2017-07-06 | S1702255011 | 23.0 ppb |
2017-07-06 | S1702255012 | 20.8 ppb |
2017-10-03 | S1704625001 | 25.0 ppb |
2017-10-03 | S1704625002 | 25.6 ppb |
2017-10-03 | S1704625003 | 31.1 ppb |
2017-10-03 | S1704625004 | 16.2 ppb |
2017-10-03 | S1704625005 | 13.2 ppb |
2017-10-03 | S1704625006 | 17.2 ppb |
2017-10-03 | S1704625007 | 23.3 ppb |
2017-10-03 | S1704625008 | 13.8 ppb |
2017-10-03 | S1704625009 | 15.3 ppb |
2017-10-03 | S1704625010 | 23.7 ppb |
2017-10-03 | S1704625011 | 16.0 ppb |
2017-10-03 | S1704625012 | 19.2 ppb |
2018-01-03 | S1707075001 | 29.1 ppb |
2018-01-03 | S1707075002 | 27.6 ppb |
2018-01-03 | S1707075003 | 24.4 ppb |
2018-01-03 | S1707075004 | 21.4 ppb |
2018-01-03 | S1707075005 | 6.00 ppb |
2018-01-03 | S1707075006 | 21.4 ppb |
2018-01-03 | S1707075007 | 23.8 ppb |
2018-01-03 | S1707075008 | 16.2 ppb |
2018-01-03 | S1707075009 | 17.3 ppb |
2018-01-03 | S1707075010 | 24.6 ppb |
2018-01-03 | S1707075011 | 18.4 ppb |
2018-01-03 | S1707075012 | 21.7 ppb |
2018-04-02 | S1800238001 | 18.4 ppb |
2018-04-02 | S1800238002 | 19.6 ppb |
2018-04-02 | S1800238003 | 22.1 ppb |
2018-04-02 | S1800238004 | 29.5 ppb |
2018-04-02 | S1800238005 | 6.20 ppb |
2018-04-02 | S1800238006 | 17.6 ppb |
2018-04-02 | S1800238007 | 23.7 ppb |
2018-04-02 | S1800238008 | 16.8 ppb |
2018-04-02 | S1800238009 | 18.0 ppb |
2018-04-02 | S1800238010 | 27.8 ppb |
2018-04-02 | S1800238011 | 22.4 ppb |
2018-04-02 | S1800238012 | 24.0 ppb |
2018-07-03 | S1802294001 | 16.9 ppb |
2018-07-03 | S1802294002 | 25.3 ppb |
2018-07-03 | S1802294003 | 22.6 ppb |
2018-07-03 | S1802294004 | 28.1 ppb |
2018-07-03 | S1802294005 | 14.9 ppb |
2018-07-03 | S1802294006 | 15.1 ppb |
2018-07-03 | S1802294007 | 27.2 ppb |
2018-07-03 | S1802294008 | 15.8 ppb |
2018-07-03 | S1802294009 | 16.5 ppb |
2018-07-03 | S1802294010 | 26.5 ppb |
2018-07-03 | S1802294011 | 16.1 ppb |
2018-07-03 | S1802294012 | 21.0 ppb |
2018-10-03 | S1804432001 | 22.1 ppb |
2018-10-03 | S1804432002 | 21.2 ppb |
2018-10-03 | S1804432003 | 24.0 ppb |
2018-10-03 | S1804432004 | 21.4 ppb |
2018-10-03 | S1804432005 | 11.3 ppb |
2018-10-03 | S1804432006 | 14.9 ppb |
2018-10-03 | S1804432007 | 24.3 ppb |
2018-10-03 | S1804432008 | 14.8 ppb |
2018-10-03 | S1804432009 | 16.2 ppb |
2018-10-03 | S1804432010 | 28.3 ppb |
2018-10-03 | S1804432011 | 16.9 ppb |
2018-10-03 | S1804432012 | 27.3 ppb |
2019-01-07 | S1806827001 | 20.0 ppb |
2019-01-07 | S1806827002 | 25.1 ppb |
2019-01-07 | S1806827003 | 24.1 ppb |
2019-01-07 | S1806827004 | 21.7 ppb |
2019-01-07 | S1806827005 | 14.0 ppb |
2019-01-07 | S1806827006 | 17.0 ppb |
2019-01-07 | S1806827007 | 21.5 ppb |
2019-01-07 | S1806827008 | 16.6 ppb |
2019-01-07 | S1806827009 | 26.1 ppb |
2019-01-07 | S1806827010 | 22.4 ppb |
2019-01-07 | S1806827011 | 23.7 ppb |
2019-01-07 | S1806827012 | 4.00 ppb |
2019-04-04 | S1904084001 | 18.0 ppb |
2019-04-04 | S1904084002 | 24.9 ppb |
2019-04-04 | S1904084003 | 26.7 ppb |
2019-04-04 | S1904084004 | 23.1 ppb |
2019-04-04 | S1904084005 | 9.50 ppb |
2019-04-04 | S1904084006 | 18.0 ppb |
2019-04-04 | S1904084007 | 22.4 ppb |
2019-04-04 | S1904084008 | 15.7 ppb |
2019-04-04 | S1904084009 | 29.6 ppb |
2019-04-04 | S1904084010 | 27.1 ppb |
2019-04-04 | S1904084011 | 17.8 ppb |
2019-04-04 | S1904084012 | 24.5 ppb |
2019-07-03 | S1916338001 | 25.5 ppb |
2019-07-03 | S1916338002 | 28.0 ppb |
2019-07-03 | S1916338003 | 20.1 ppb |
2019-07-03 | S1916338004 | 18.8 ppb |
2019-07-03 | S1916338005 | 14.1 ppb |
2019-07-03 | S1916338006 | 15.7 ppb |
2019-07-03 | S1916338007 | 24.4 ppb |
2019-07-03 | S1916338008 | 13.8 ppb |
2019-07-03 | S1916338009 | 14.7 ppb |
2019-07-03 | S1916338010 | 25.7 ppb |
2019-07-03 | S1916338011 | 22.3 ppb |
2019-07-03 | S1916338012 | 20.8 ppb |
2019-10-03 | S1945082001 | 18.1 ppb |
2019-10-03 | S1945082002 | 25.2 ppb |
2019-10-03 | S1945082003 | 25.6 ppb |
2019-10-03 | S1945082004 | 22.2 ppb |
2019-10-03 | S1945082005 | 13.6 ppb |
2019-10-03 | S1945082006 | 16.8 ppb |
2019-10-03 | S1945082007 | 18.4 ppb |
2019-10-03 | S1945082008 | 12.6 ppb |
2019-10-03 | S1945082009 | 13.8 ppb |
2019-10-03 | S1945082010 | 22.5 ppb |
2019-10-03 | S1945082011 | 14.6 ppb |
2019-10-03 | S1945082012 | 17.9 ppb |