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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

Sacramento Suburban Water District

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.

 

90

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND90ND
2013ND80ND
2014N/A00N/A
2015ND20ND
2016ND40ND
20173.08 ppb679ND - 37.0 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
2012-01-095810-107-1400ND
2012-04-115810-240-1330ND
2012-07-265810-087-1320ND
2012-09-065810-111-0520ND
2012-09-065810-133-0555ND
2012-10-015810-105-1100ND
2012-10-015810-104-1055ND
2012-10-015810-106-1105ND
2012-10-035810-240-0950ND
2013-01-145810-020-0000ND
2013-01-305810-246-1505ND
2013-04-185810-016-1400ND
2013-07-025810-052-1300ND
2013-07-025810-065-1400ND
2013-07-025810-013-1330ND
2013-10-095810-104-1015ND
2013-10-095810-105-1020ND
2015-01-075810-081-1050ND
2015-09-175810-135-1315ND
2016-07-135810-111-1130ND
2016-07-135810-240-1140ND
2016-07-135810-246-0910ND
2016-07-145810-107-1115ND
2017-09-059590-062-0845ND
2017-09-059590-001-1100ND
2017-09-059590-085-1030ND
2017-09-059590-244-1050ND
2017-09-069590-107-1145ND
2017-09-069590-240-1200ND
2017-09-069590-098-1020ND
2017-09-069590-080-1050ND
2017-09-079590-073-1345ND
2017-09-119590-022-1115ND
2017-09-119590-052-1000ND
2017-09-119590-051-1100ND
2017-09-119590-034-1330ND
2017-09-129590-064-1145ND
2017-09-129590-021-1115ND
2017-09-129590-087-1300ND
2017-09-129590-010-0930ND
2017-09-129590-081-0940ND
2017-09-129590-042-1230ND
2017-09-129590-072-1330ND
2017-09-129590-070-1200ND
2017-09-129590-066-1030ND
2017-09-139590-145-1019ND
2017-09-139590-078-0927ND
2017-09-139590-056-1045ND
2017-09-139590-054-1335ND
2017-09-149590-071-0945ND
2017-09-149590-011-0900ND
2017-09-199590-025-1120ND
2017-09-199590-020-0900ND
2017-09-199590-018-1300ND
2017-09-199590-015-1330ND
2017-09-199590-032-1100ND
2017-09-219590-065-1145ND
2017-09-259590-019-1030ND
2017-09-269590-030-1130ND
2017-09-269590-142-1251ND
2017-09-269590-013-0900ND
2017-09-269590-102-0900ND
2017-09-269590-061-1100ND
2017-09-279590-007-1235ND
2017-09-279590-027-1200ND
2017-09-279590-111-1100ND
2017-09-289590-035-0920ND
2017-09-289590-069-1315ND
2017-10-039590-029-0945ND
2017-10-059590-020-1025ND
2017-10-069590-074-0937ND
2017-10-119590-081-1340ND
2017-10-119590-083-0921ND
2017-10-129590-246-1158ND
2017-10-129590-065-1110ND
2017-10-179590-901-0830ND
2017-10-179590-908-123036.0 ppb
2017-10-179590-907-103036.0 ppb
2017-10-179590-906-100017.0 ppb
2017-10-179590-905-120037.0 ppb
2017-10-179590-904-093032.0 ppb
2017-10-179590-903-110013.0 ppb
2017-10-179590-902-113033.0 ppb
2017-10-259590-104-1015ND
2017-10-259590-105-1200ND
2017-11-079590-089-10401.000 ppb
2017-11-209590-075-1015ND
2017-12-129590-012-1140ND
2017-12-139590-055-13201.10 ppb
2017-12-199590-065-0955ND