Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

California American Water Company - Suburban

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

MORE ABOUT THIS CONTAMINANT

 

169

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0150 ppb201ND - 0.300 ppb
20150.0200 ppb201ND - 0.400 ppb
2016N/A00N/A
2017ND440ND
2018ND600ND
2019ND250ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-10-0627313301ND
2014-10-0627147901ND
2014-10-0627148101ND
2014-10-0627147701ND
2014-10-0627147801ND
2014-10-0627484301ND
2014-10-0627148401ND
2014-10-0627147201ND
2014-10-0627313901ND
2014-10-0827148201ND
2014-10-0827147401ND
2014-10-0827147601ND
2014-10-0827147301ND
2014-10-0827313701ND
2014-10-08273142010.300 ppb
2014-10-1527148301ND
2014-10-1527313601ND
2014-10-1527314001ND
2014-10-1527314101ND
2014-10-2327313401ND
2015-04-0628697901ND
2015-04-0628697801ND
2015-04-0628698001ND
2015-04-0628698401ND
2015-04-0628698201ND
2015-04-0628698301ND
2015-04-0628698901ND
2015-04-0728697401ND
2015-04-0728697301ND
2015-04-0728697501ND
2015-04-0728699001ND
2015-04-0728699101ND
2015-04-0828698501ND
2015-04-0928697201ND
2015-04-09286992010.400 ppb
2015-04-1528698701ND
2015-04-2328697601ND
2015-07-0829299501ND
2015-07-3029268601ND
2015-09-1628698601ND
2017-09-195810-010-1420ND
2017-09-195810-064-1520ND
2017-09-195810-066-1520ND
2017-09-205810-010-1055ND
2017-09-205810-064-1112ND
2017-09-205810-066-1118ND
2017-09-215810-010-1303ND
2017-09-215810-064-1319ND
2017-09-215810-066-1324ND
2017-09-225810-010-1143ND
2017-09-225810-064-1158ND
2017-09-225810-066-1203ND
2017-09-235810-010-1228ND
2017-09-235810-064-1143ND
2017-09-235810-066-1248ND
2017-09-265810-010-1328ND
2017-09-265810-064-1343ND
2017-09-265810-066-1348ND
2017-10-035810-010-0730ND
2017-10-035810-064-0745ND
2017-10-035810-066-0750ND
2017-10-105810-010-1442ND
2017-10-105810-064-1500ND
2017-10-105810-066-1505ND
2017-10-175810-010-1342ND
2017-10-245810-010-1350ND
2017-10-245810-064-1405ND
2017-10-245810-066-1410ND
2017-10-315810-010-1228ND
2017-10-315810-064-1243ND
2017-10-315810-066-1248ND
2017-11-075810-010-0915ND
2017-11-075810-064-0930ND
2017-11-075810-066-0935ND
2017-11-145810-010-1226ND
2017-11-145810-064-1241ND
2017-11-145810-066-1246ND
2017-11-215810-010-1118ND
2017-11-215810-064-1133ND
2017-11-215810-066-1138ND
2017-11-285810-010-1337ND
2017-11-285810-064-1352ND
2017-11-285810-066-1357ND
2017-12-125810-010-1320ND
2018-01-025810-010-1205ND
2018-01-025810-063-1215ND
2018-01-025810-064-1220ND
2018-01-025810-065-1225ND
2018-01-025810-066-1230ND
2018-02-205810-010-1030ND
2018-02-205810-063-1045ND
2018-02-205810-064-1050ND
2018-02-205810-065-1055ND
2018-02-205810-066-1100ND
2018-03-125810-010-0936ND
2018-03-125810-063-0950ND
2018-03-125810-064-0955ND
2018-03-125810-065-1000ND
2018-03-125810-066-1005ND
2018-04-035810-010-1400ND
2018-04-035810-063-1415ND
2018-04-035810-064-1420ND
2018-04-035810-065-1425ND
2018-04-035810-066-1430ND
2018-05-015810-010-1145ND
2018-05-015810-063-1200ND
2018-05-015810-064-1205ND
2018-05-015810-065-1210ND
2018-05-015810-066-1215ND
2018-06-135810-010-1100ND
2018-06-135810-063-1110ND
2018-06-135810-064-1115ND
2018-06-135810-065-1120ND
2018-06-135810-066-1125ND
2018-07-115810-010-1130ND
2018-07-115810-063-1140ND
2018-07-115810-064-1145ND
2018-07-115810-065-1150ND
2018-07-115810-066-1155ND
2018-08-145810-010-1415ND
2018-08-145810-063-1425ND
2018-08-145810-064-1430ND
2018-08-145810-065-1435ND
2018-08-145810-066-1440ND
2018-09-115810-010-1030ND
2018-09-115810-063-1040ND
2018-09-115810-064-1045ND
2018-09-115810-065-1050ND
2018-09-115810-066-1055ND
2018-10-165810-010-1000ND
2018-10-165810-063-1005ND
2018-10-165810-064-1010ND
2018-10-165810-065-1015ND
2018-10-165810-066-1020ND
2018-11-065810-010-1030ND
2018-11-065810-063-1035ND
2018-11-065810-064-1040ND
2018-11-065810-065-1045ND
2018-11-065810-066-1050ND
2018-12-125810-010-1125ND
2018-12-125810-063-1130ND
2018-12-125810-064-1135ND
2018-12-125810-065-1140ND
2018-12-125810-066-1145ND
2019-01-085810-010-1200ND
2019-01-085810-063-1205ND
2019-01-085810-064-1210ND
2019-01-085810-065-1215ND
2019-01-085810-066-1220ND
2019-02-125810-010-1100ND
2019-02-125810-063-1105ND
2019-02-125810-064-1110ND
2019-02-125810-065-1115ND
2019-02-125810-066-1120ND
2019-03-195810-010-1030ND
2019-03-195810-063-1035ND
2019-03-195810-064-1040ND
2019-03-195810-065-1045ND
2019-03-195810-066-1050ND
2019-04-175810-010-1000ND
2019-04-175810-063-1005ND
2019-04-175810-064-1010ND
2019-04-175810-065-1015ND
2019-04-175810-066-1020ND
2019-05-145810-010-0940ND
2019-05-145810-063-0945ND
2019-05-145810-064-0950ND
2019-05-145810-065-0955ND
2019-05-145810-066-1000ND