Chloroform
City of Virginia Beach
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 | 31.6 ppb | 48 | 48 | 13.0 ppb - 46.0 ppb |
2015 | 33.0 ppb | 48 | 48 | 15.0 ppb - 52.0 ppb |
2016 | 41.2 ppb | 48 | 48 | 20.0 ppb - 57.0 ppb |
2017 | 42.7 ppb | 48 | 48 | 31.0 ppb - 59.0 ppb |
2018 | 32.4 ppb | 48 | 48 | 11.0 ppb - 47.0 ppb |
2019 | 32.4 ppb | 48 | 48 | 20.0 ppb - 46.0 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 |
---|---|---|
2014-01-13 | 201401140412-THM | 20.0 ppb |
2014-01-13 | 201401140408-THM | 18.0 ppb |
2014-01-13 | 201401140413-THM | 17.0 ppb |
2014-01-13 | 201401140416-THM | 17.0 ppb |
2014-01-13 | 201401140410-THM | 17.0 ppb |
2014-01-13 | 201401140405-THM | 17.0 ppb |
2014-01-13 | 201401140414-THM | 16.0 ppb |
2014-01-13 | 201401140415-THM | 16.0 ppb |
2014-01-13 | 201401140409-THM | 14.0 ppb |
2014-01-13 | 201401140411-THM | 14.0 ppb |
2014-01-13 | 201401140406-THM | 13.0 ppb |
2014-01-13 | 201401140407-THM | 13.0 ppb |
2014-04-18 | 201404220510-THM | 41.0 ppb |
2014-04-18 | 201404220503-THM | 39.0 ppb |
2014-04-18 | 201404220514-THM | 39.0 ppb |
2014-04-18 | 201404220508-THM | 37.0 ppb |
2014-04-18 | 201404220511-THM | 36.0 ppb |
2014-04-18 | 201404220506-THM | 32.0 ppb |
2014-04-18 | 201404220512-THM | 32.0 ppb |
2014-04-18 | 201404220513-THM | 31.0 ppb |
2014-04-18 | 201404220509-THM | 30.0 ppb |
2014-04-18 | 201404220507-THM | 29.0 ppb |
2014-04-18 | 201404220505-THM | 28.0 ppb |
2014-04-18 | 201404220504-THM | 28.0 ppb |
2014-07-16 | 201407170780-THM | 46.0 ppb |
2014-07-16 | 201407170785-THM | 46.0 ppb |
2014-07-16 | 201407170782-THM | 46.0 ppb |
2014-07-16 | 201407170783-THM | 45.0 ppb |
2014-07-16 | 201407170784-THM | 45.0 ppb |
2014-07-16 | 201407170781-THM | 45.0 ppb |
2014-07-16 | 201407170778-THM | 44.0 ppb |
2014-07-16 | 201407170786-THM | 43.0 ppb |
2014-07-16 | 201407170788-THM | 43.0 ppb |
2014-07-16 | 201407170779-THM | 42.0 ppb |
2014-07-16 | 201407170787-THM | 42.0 ppb |
2014-07-16 | 201407170789-THM | 41.0 ppb |
2014-10-14 | 201410160503-THM | 36.0 ppb |
2014-10-14 | 201410160505-THM | 35.0 ppb |
2014-10-14 | 201410160507-THM | 34.0 ppb |
2014-10-14 | 201410160504-THM | 34.0 ppb |
2014-10-14 | 201410160501-THM | 34.0 ppb |
2014-10-14 | 201410160506-THM | 33.0 ppb |
2014-10-14 | 201410160496-THM | 33.0 ppb |
2014-10-14 | 201410160499-THM | 32.0 ppb |
2014-10-14 | 201410160497-THM | 32.0 ppb |
2014-10-14 | 201410160500-THM | 32.0 ppb |
2014-10-14 | 201410160502-THM | 30.0 ppb |
2014-10-14 | 201410160498-THM | 30.0 ppb |
2015-01-15 | 460260-EUROFINS | 28.0 ppb |
2015-01-15 | 460260-EUROFINS | 28.0 ppb |
2015-01-15 | 460260-EUROFINS | 26.0 ppb |
2015-01-15 | 460260-EUROFINS | 26.0 ppb |
2015-01-15 | 460260-EUROFINS | 26.0 ppb |
2015-01-15 | 460260-EUROFINS | 25.0 ppb |
2015-01-15 | 460260-EUROFINS | 24.0 ppb |
2015-01-15 | 460260-EUROFINS | 23.0 ppb |
2015-01-15 | 460260-EUROFINS | 20.0 ppb |
2015-01-15 | 460260-EUROFINS | 18.0 ppb |
2015-01-15 | 460260-EUROFINS | 17.0 ppb |
2015-01-15 | 460260-EUROFINS | 15.0 ppb |
2015-04-15 | 460260-EUROFINS | 35.0 ppb |
2015-04-15 | 460260-EUROFINS | 35.0 ppb |
2015-04-15 | 460260-EUROFINS | 35.0 ppb |
2015-04-15 | 460260-EUROFINS | 35.0 ppb |
2015-04-15 | 460260-EUROFINS | 35.0 ppb |
2015-04-15 | 460260-EUROFINS | 34.0 ppb |
2015-04-15 | 460260-EUROFINS | 34.0 ppb |
2015-04-15 | 460260-EUROFINS | 34.0 ppb |
2015-04-15 | 460260-EUROFINS | 32.0 ppb |
2015-04-15 | 460260-EUROFINS | 32.0 ppb |
2015-04-15 | 460260-EUROFINS | 32.0 ppb |
2015-04-15 | 460260-EUROFINS | 31.0 ppb |
2015-07-14 | 460260-EUROFINS | 52.0 ppb |
2015-07-14 | 460260-EUROFINS | 51.0 ppb |
2015-07-14 | 460260-EUROFINS | 49.0 ppb |
2015-07-14 | 460260-EUROFINS | 47.0 ppb |
2015-07-14 | 460260-EUROFINS | 47.0 ppb |
2015-07-14 | 460260-EUROFINS | 46.0 ppb |
2015-07-14 | 460260-EUROFINS | 46.0 ppb |
2015-07-14 | 460260-EUROFINS | 46.0 ppb |
2015-07-14 | 460260-EUROFINS | 45.0 ppb |
2015-07-14 | 460260-EUROFINS | 45.0 ppb |
2015-07-14 | 460260-EUROFINS | 44.0 ppb |
2015-07-14 | 460260-EUROFINS | 44.0 ppb |
2015-10-12 | 460260-EUROFINS | 32.0 ppb |
2015-10-12 | 460260-EUROFINS | 31.0 ppb |
2015-10-12 | 460260-EUROFINS | 30.0 ppb |
2015-10-12 | 460260-EUROFINS | 29.0 ppb |
2015-10-12 | 460260-EUROFINS | 28.0 ppb |
2015-10-12 | 460260-EUROFINS | 28.0 ppb |
2015-10-12 | 460260-EUROFINS | 28.0 ppb |
2015-10-12 | 460260-EUROFINS | 27.0 ppb |
2015-10-12 | 460260-EUROFINS | 27.0 ppb |
2015-10-12 | 460260-EUROFINS | 27.0 ppb |
2015-10-12 | 460260-EUROFINS | 27.0 ppb |
2015-10-12 | 460260-EUROFINS | 27.0 ppb |
2016-01-26 | 201601270682-THM | 29.0 ppb |
2016-01-26 | 201601270677-THM | 28.0 ppb |
2016-01-26 | 201601270683-THM | 28.0 ppb |
2016-01-26 | 201601270685-THM | 28.0 ppb |
2016-01-26 | 201601270674-THM | 27.0 ppb |
2016-01-26 | 201601270681-THM | 27.0 ppb |
2016-01-26 | 201601270684-THM | 26.0 ppb |
2016-01-26 | 201601270676-THM | 23.0 ppb |
2016-01-26 | 201601270678-THM | 23.0 ppb |
2016-01-26 | 201601270680-THM | 23.0 ppb |
2016-01-26 | 201601270679-THM | 22.0 ppb |
2016-01-26 | 201601270675-THM | 20.0 ppb |
2016-04-11 | 201604130477-THM | 46.0 ppb |
2016-04-11 | 201604130482-THM | 46.0 ppb |
2016-04-11 | 201604130481-THM | 45.0 ppb |
2016-04-11 | 201604130479-THM | 45.0 ppb |
2016-04-11 | 201604130484-THM | 44.0 ppb |
2016-04-11 | 201604130483-THM | 44.0 ppb |
2016-04-11 | 201604130474-THM | 43.0 ppb |
2016-04-11 | 201604130485-THM | 42.0 ppb |
2016-04-11 | 201604130480-THM | 39.0 ppb |
2016-04-11 | 201604130476-THM | 39.0 ppb |
2016-04-11 | 201604130475-THM | 39.0 ppb |
2016-04-11 | 201604130478-THM | 37.0 ppb |
2016-07-11 | 201607140024-THM | 57.0 ppb |
2016-07-11 | 201607140032-THM | 56.0 ppb |
2016-07-11 | 201607140022-THM | 55.0 ppb |
2016-07-11 | 201607140027-THM | 55.0 ppb |
2016-07-11 | 201607140023-THM | 54.0 ppb |
2016-07-11 | 201607140025-THM | 54.0 ppb |
2016-07-11 | 201607140029-THM | 54.0 ppb |
2016-07-11 | 201607140028-THM | 52.0 ppb |
2016-07-11 | 201607140026-THM | 51.0 ppb |
2016-07-11 | 201607140033-THM | 51.0 ppb |
2016-07-11 | 201607140030-THM | 50.0 ppb |
2016-07-11 | 201607140031-THM | 50.0 ppb |
2016-10-12 | 201610130673-THM | 53.0 ppb |
2016-10-12 | 201610130665-THM | 49.0 ppb |
2016-10-12 | 201610130668-THM | 49.0 ppb |
2016-10-12 | 201610130676-THM | 49.0 ppb |
2016-10-12 | 201610130666-THM | 44.0 ppb |
2016-10-12 | 201610130667-THM | 44.0 ppb |
2016-10-12 | 201610130669-THM | 43.0 ppb |
2016-10-12 | 201610130671-THM | 42.0 ppb |
2016-10-12 | 201610130672-THM | 40.0 ppb |
2016-10-12 | 201610130670-THM | 39.0 ppb |
2016-10-12 | 201610130674-THM | 38.0 ppb |
2016-10-12 | 201610130675-THM | 36.0 ppb |
2017-01-17 | 201701190745-THM | 45.0 ppb |
2017-01-17 | 201701190740-THM | 43.0 ppb |
2017-01-17 | 201701190742-THM | 43.0 ppb |
2017-01-17 | 201701190746-THM | 43.0 ppb |
2017-01-17 | 201701190744-THM | 42.0 ppb |
2017-01-17 | 201701190737-THM | 41.0 ppb |
2017-01-17 | 201701190747-THM | 40.0 ppb |
2017-01-17 | 201701190748-THM | 40.0 ppb |
2017-01-17 | 201701190739-THM | 35.0 ppb |
2017-01-17 | 201701190741-THM | 35.0 ppb |
2017-01-17 | 201701190738-THM | 33.0 ppb |
2017-01-17 | 201701190743-THM | 32.0 ppb |
2017-04-10 | 201704111962-THM | 59.0 ppb |
2017-04-10 | 201704111968-THM | 52.0 ppb |
2017-04-10 | 201704111967-THM | 49.0 ppb |
2017-04-10 | 201704111966-THM | 47.0 ppb |
2017-04-10 | 201704111961-THM | 44.0 ppb |
2017-04-10 | 201704111963-THM | 43.0 ppb |
2017-04-10 | 201704111965-THM | 43.0 ppb |
2017-04-10 | 201704111957-THM | 43.0 ppb |
2017-04-10 | 201704111960-THM | 43.0 ppb |
2017-04-10 | 201704111959-THM | 42.0 ppb |
2017-04-10 | 201704111964-THM | 41.0 ppb |
2017-04-10 | 201704111958-THM | 36.0 ppb |
2017-07-11 | 201707121235-THM | 50.0 ppb |
2017-07-11 | 201707121239-THM | 50.0 ppb |
2017-07-11 | 201707121232-THM | 49.0 ppb |
2017-07-11 | 201707121242-THM | 49.0 ppb |
2017-07-11 | 201707121233-THM | 48.0 ppb |
2017-07-11 | 201707121234-THM | 48.0 ppb |
2017-07-11 | 201707121237-THM | 48.0 ppb |
2017-07-11 | 201707121238-THM | 48.0 ppb |
2017-07-11 | 201707121240-THM | 48.0 ppb |
2017-07-11 | 201707121243-THM | 48.0 ppb |
2017-07-11 | 201707121236-THM | 45.0 ppb |
2017-07-11 | 201707121241-THM | 45.0 ppb |
2017-10-10 | 201710111277-THM | 42.0 ppb |
2017-10-10 | 201710111282-THM | 42.0 ppb |
2017-10-10 | 201710111285-THM | 41.0 ppb |
2017-10-10 | 201710111281-THM | 41.0 ppb |
2017-10-10 | 201710111284-THM | 41.0 ppb |
2017-10-10 | 201710111279-THM | 40.0 ppb |
2017-10-10 | 201710111283-THM | 40.0 ppb |
2017-10-10 | 201710111274-THM | 39.0 ppb |
2017-10-10 | 201710111280-THM | 37.0 ppb |
2017-10-10 | 201710111276-THM | 34.0 ppb |
2017-10-10 | 201710111278-THM | 31.0 ppb |
2017-10-10 | 201710111275-THM | 31.0 ppb |
2018-01-16 | 201801180624-THM | 17.0 ppb |
2018-01-16 | 201801180625-THM | 11.0 ppb |
2018-01-16 | 201801180626-THM | 11.0 ppb |
2018-01-16 | 201801180627-THM | 17.0 ppb |
2018-01-16 | 201801180628-THM | 13.0 ppb |
2018-01-16 | 201801180629-THM | 18.0 ppb |
2018-01-16 | 201801180630-THM | 12.0 ppb |
2018-01-16 | 201801180631-THM | 17.0 ppb |
2018-01-16 | 201801180632-THM | 20.0 ppb |
2018-01-16 | 201801180633-THM | 18.0 ppb |
2018-01-16 | 201801180634-THM | 15.0 ppb |
2018-01-16 | 201801180635-THM | 18.0 ppb |
2018-04-12 | 201804160553-THM | 36.0 ppb |
2018-04-12 | 201804160554-THM | 31.0 ppb |
2018-04-12 | 201804160555-THM | 35.0 ppb |
2018-04-12 | 201804160556-THM | 31.0 ppb |
2018-04-12 | 201804160557-THM | 32.0 ppb |
2018-04-12 | 201804160558-THM | 29.0 ppb |
2018-04-12 | 201804160559-THM | 32.0 ppb |
2018-04-12 | 201804160560-THM | 33.0 ppb |
2018-04-12 | 201804160561-THM | 34.0 ppb |
2018-04-12 | 201804160562-THM | 33.0 ppb |
2018-04-12 | 201804160563-THM | 34.0 ppb |
2018-04-12 | 201804160564-THM | 38.0 ppb |
2018-07-10 | 201807130685-THM | 41.0 ppb |
2018-07-10 | 201807130686-THM | 42.0 ppb |
2018-07-10 | 201807130688-THM | 43.0 ppb |
2018-07-10 | 201807130689-THM | 46.0 ppb |
2018-07-10 | 201807130690-THM | 41.0 ppb |
2018-07-10 | 201807130691-THM | 46.0 ppb |
2018-07-10 | 201807130692-THM | 45.0 ppb |
2018-07-10 | 201807130693-THM | 44.0 ppb |
2018-07-10 | 201807130694-THM | 44.0 ppb |
2018-07-10 | 201807130695-THM | 47.0 ppb |
2018-07-10 | 201807130696-THM | 46.0 ppb |
2018-08-13 | 201808160284-THM | 43.0 ppb |
2018-10-09 | 201810110977-THM | 37.0 ppb |
2018-10-09 | 201810110978-THM | 37.0 ppb |
2018-10-09 | 201810110979-THM | 38.0 ppb |
2018-10-09 | 201810110980-THM | 38.0 ppb |
2018-10-09 | 201810110981-THM | 39.0 ppb |
2018-10-09 | 201810110982-THM | 35.0 ppb |
2018-10-09 | 201810110983-THM | 36.0 ppb |
2018-10-09 | 201810110984-THM | 38.0 ppb |
2018-10-09 | 201810110985-THM | 36.0 ppb |
2018-10-09 | 201810110986-THM | 35.0 ppb |
2018-10-09 | 201810110987-THM | 36.0 ppb |
2018-10-09 | 201810110988-THM | 37.0 ppb |
2019-01-15 | 201901160610-THM | 21.0 ppb |
2019-01-15 | 201901160611-THM | 20.0 ppb |
2019-01-15 | 201901160612-THM | 27.0 ppb |
2019-01-15 | 201901160613-THM | 22.0 ppb |
2019-01-15 | 201901160614-THM | 26.0 ppb |
2019-01-15 | 201901160615-THM | 22.0 ppb |
2019-01-15 | 201901160616-THM | 26.0 ppb |
2019-01-15 | 201901160617-THM | 22.0 ppb |
2019-01-15 | 201901160618-THM | 26.0 ppb |
2019-01-15 | 201901160619-THM | 25.0 ppb |
2019-01-15 | 201901160620-THM | 27.0 ppb |
2019-01-15 | 201901160621-THM | 26.0 ppb |
2019-04-08 | 201904100548-THM | 31.0 ppb |
2019-04-08 | 201904100549-THM | 32.0 ppb |
2019-04-08 | 201904100550-THM | 35.0 ppb |
2019-04-08 | 201904100551-THM | 32.0 ppb |
2019-04-08 | 201904100552-THM | 33.0 ppb |
2019-04-08 | 201904100553-THM | 32.0 ppb |
2019-04-08 | 201904100554-THM | 34.0 ppb |
2019-04-08 | 201904100555-THM | 35.0 ppb |
2019-04-08 | 201904100556-THM | 33.0 ppb |
2019-04-08 | 201904100557-THM | 34.0 ppb |
2019-04-08 | 201904100558-THM | 34.0 ppb |
2019-04-08 | 201904100559-THM | 34.0 ppb |
2019-07-09 | 201907120411-THM | 41.0 ppb |
2019-07-09 | 201907120412-THM | 40.0 ppb |
2019-07-09 | 201907120413-THM | 46.0 ppb |
2019-07-09 | 201907120414-THM | 43.0 ppb |
2019-07-09 | 201907120415-THM | 45.0 ppb |
2019-07-09 | 201907120416-THM | 42.0 ppb |
2019-07-09 | 201907120417-THM | 43.0 ppb |
2019-07-09 | 201907120418-THM | 43.0 ppb |
2019-07-09 | 201907120419-THM | 41.0 ppb |
2019-07-09 | 201907120420-THM | 42.0 ppb |
2019-07-09 | 201907120421-THM | 44.0 ppb |
2019-07-09 | 201907120422-THM | 44.0 ppb |
2019-10-09 | 201910110514 | 28.0 ppb |
2019-10-09 | 201910110515 | 26.0 ppb |
2019-10-09 | 201910110516 | 28.0 ppb |
2019-10-09 | 201910110517 | 25.0 ppb |
2019-10-09 | 201910110518 | 31.0 ppb |
2019-10-09 | 201910110519 | 30.0 ppb |
2019-10-09 | 201910110520 | 30.0 ppb |
2019-10-09 | 201910110521 | 32.0 ppb |
2019-10-09 | 201910110522 | 30.0 ppb |
2019-10-09 | 201910110523 | 30.0 ppb |
2019-10-09 | 201910110524 | 31.0 ppb |
2019-10-09 | 201910110525 | 29.0 ppb |