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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Camp Pendleton (North)

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

 

186

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0364 ppb331ND - 1.20 ppb
20150.353 ppb342ND - 9.80 ppb
20160.308 ppb366ND - 3.10 ppb
20172.04 ppb296ND - 52.0 ppb
20180.233 ppb275ND - 1.70 ppb
20190.0889 ppb272ND - 1.30 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
2014-01-279590-002-1150ND
2014-01-279590-003-1135ND
2014-02-062168-801-1135ND
2014-02-062168-802-1050ND
2014-02-062168-803-1110ND
2014-02-062168-804-10051.20 ppb
2014-03-129590-011-1135ND
2014-04-179590-006-1045ND
2014-04-179590-008-1115ND
2014-04-179590-009-1146ND
2014-04-189590-004-1152ND
2014-04-189590-005-1210ND
2014-04-189590-022-1120ND
2014-05-072168-801-1215ND
2014-05-072168-802-1205ND
2014-05-072168-803-1135ND
2014-05-072168-804-1055ND
2014-05-219590-002-1240ND
2014-05-219590-003-1200ND
2014-05-219590-010-1135ND
2014-07-149590-002-1045ND
2014-07-149590-003-1020ND
2014-08-062168-801-1210ND
2014-08-062168-802-1030ND
2014-08-062168-803-1055ND
2014-08-062168-804-1145ND
2014-11-032168-801-1315ND
2014-11-032168-802-1240ND
2014-11-032168-803-1210ND
2014-11-032168-804-1350ND
2014-11-209590-003-1355ND
2014-11-249590-002-1135ND
2014-11-249590-010-1245ND
2015-01-269590-010-1240ND
2015-01-289590-002-1120ND
2015-01-289590-003-1045ND
2015-02-042168-801-1415ND
2015-02-042168-802-1340ND
2015-02-042168-803-1235ND
2015-02-042168-804-1310ND
2015-03-209590-006-1040ND
2015-03-209590-008-1115ND
2015-03-209590-009-1156ND
2015-05-042168-801-1415ND
2015-05-042168-802-1350ND
2015-05-042168-803-1310ND
2015-05-042168-804-1225ND
2015-05-119590-002-1315ND
2015-05-119590-003-1250ND
2015-05-119590-010-1215ND
2015-07-319590-002-1340ND
2015-08-039590-003-1235ND
2015-08-042168-801-1310ND
2015-08-042168-802-1335ND
2015-08-042168-803-1155ND
2015-08-042168-804-1235ND
2015-08-069590-010-1130ND
2015-08-209590-005-10452.20 ppb
2015-10-159590-010-1335ND
2015-10-229590-002-1200ND
2015-10-229590-003-1110ND
2015-11-042168-801-1150ND
2015-11-042168-802-1130ND
2015-11-042168-803-1105ND
2015-11-042168-804-1030ND
2015-11-059590-004-10109.80 ppb
2015-11-059590-022-0945ND
2016-01-289590-010-1255ND
2016-01-289590-011-1215ND
2016-02-019590-005-1145ND
2016-02-042168-801-1315ND
2016-02-042168-802-13351.000 ppb
2016-02-042168-803-1215ND
2016-02-042168-804-1245ND
2016-02-059590-002-1230ND
2016-02-059590-003-11552.60 ppb
2016-02-059590-004-10101.60 ppb
2016-02-059590-006-11303.10 ppb
2016-02-059590-008-1100ND
2016-05-042168-801-1135ND
2016-05-042168-802-1215ND
2016-05-042168-803-1100ND
2016-05-042168-804-1250ND
2016-05-109590-010-1235ND
2016-05-109590-011-11551.80 ppb
2016-05-129590-003-1250ND
2016-06-029590-002-1145ND
2016-08-039590-010-1315ND
2016-08-039590-011-1255ND
2016-08-042168-801-1300ND
2016-08-042168-802-1230ND
2016-08-042168-803-1200ND
2016-08-042168-804-1050ND
2016-08-059590-002-1300ND
2016-08-059590-003-1240ND
2016-11-072168-801-1145ND
2016-11-072168-802-1215ND
2016-11-072168-803-1245ND
2016-11-072168-804-13151.000 ppb
2016-11-179590-002-1120ND
2016-11-179590-003-1210ND
2016-11-229590-010-1100ND
2016-11-229590-011-1025ND
2017-02-032168-801-1210ND
2017-02-032168-802-1250ND
2017-02-032168-803-1320ND
2017-02-032168-804-1405ND
2017-02-099590-002-1115ND
2017-02-099590-003-1200ND
2017-02-139590-006-1210ND
2017-02-159590-008-1015ND
2017-03-019590-004-1200ND
2017-03-019590-005-11232.00 ppb
2017-05-039590-002-1130ND
2017-05-039590-003-1230ND
2017-05-052168-801-11201.50 ppb
2017-05-052168-802-1205ND
2017-05-052168-803-1255ND
2017-05-052168-804-1325ND
2017-07-269590-002-1145ND
2017-07-269590-003-1210ND
2017-08-042168-801-1010ND
2017-08-042168-802-1035ND
2017-08-042168-803-11101.30 ppb
2017-08-042168-804-11451.10 ppb
2017-11-032168-801-1050ND
2017-11-032168-802-1120ND
2017-11-032168-803-1150ND
2017-11-032168-804-12251.20 ppb
2017-12-079590-002-1055ND
2017-12-079590-003-1135ND
2017-12-189590-009-113552.0 ppb
2018-01-179590-002-1250ND
2018-01-189590-003-1315ND
2018-02-019590-008-1145ND
2018-02-029590-006-1040ND
2018-02-059590-009-11301.70 ppb
2018-02-052168-801-09301.20 ppb
2018-02-052168-802-0955ND
2018-02-052168-803-1025ND
2018-02-052168-804-1055ND
2018-04-139590-002-1110ND
2018-04-239590-003-1215ND
2018-05-042168-801-11251.000 ppb
2018-05-042168-802-1200ND
2018-05-042168-803-12351.000 ppb
2018-05-042168-804-13051.40 ppb
2018-07-239590-002-0920ND
2018-07-239590-003-1010ND
2018-08-032168-801-1030ND
2018-08-032168-802-1058ND
2018-08-032168-803-1130ND
2018-08-032168-804-1202ND
2018-11-052168-801-1030ND
2018-11-052168-802-1100ND
2018-11-052168-803-1130ND
2018-11-052168-804-1205ND
2018-11-159590-002-1150ND
2018-12-129590-003-1120ND
2019-01-299590-002-1115ND
2019-01-299590-003-1200ND
2019-02-042168-801-1050ND
2019-02-042168-802-1120ND
2019-02-042168-803-1200ND
2019-02-042168-804-1230ND
2019-02-089590-006-0900ND
2019-02-089590-008-1015ND
2019-02-119590-009-1146ND
2019-05-032168-801-1015ND
2019-05-032168-802-0945ND
2019-05-032168-803-0825ND
2019-05-032168-804-0910ND
2019-05-249590-002-1130ND
2019-05-299590-003-1130ND
2019-07-299590-002-1100ND
2019-07-299590-003-1200ND
2019-08-052168-801-07501.10 ppb
2019-08-052168-802-0840ND
2019-08-052168-803-0915ND
2019-08-052168-804-0946ND
2019-11-042168-801-11151.30 ppb
2019-11-042168-802-1135ND
2019-11-042168-803-1205ND
2019-11-042168-804-1240ND
2019-11-059590-002-1110ND
2019-11-059590-003-1200ND