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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

California American Water Company - Monterey

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

 

174

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND70ND
2014ND530ND
2015ND290ND
2016ND270ND
2017ND290ND
2018ND210ND
2019ND80ND

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
2013-09-0923390901ND
2013-09-1123391101ND
2013-09-1123386401ND
2013-09-1123389701ND
2013-10-0723388801ND
2013-10-3023389101ND
2013-12-1624208001ND
2014-01-085810-075-1125ND
2014-01-085810-076-1135ND
2014-01-085810-077-1155ND
2014-01-085810-083-1215ND
2014-02-055810-075-1058ND
2014-02-055810-076-1133ND
2014-02-055810-077-1018ND
2014-03-035810-075-1346ND
2014-03-035810-076-1406ND
2014-03-035810-077-1318ND
2014-03-1024995901ND
2014-03-1024998501ND
2014-03-1124999601ND
2014-03-1125000001ND
2014-03-1124992101ND
2014-04-035810-075-1219ND
2014-04-035810-076-1244ND
2014-04-035810-077-1126ND
2014-04-035810-083-1201ND
2014-04-0924999801ND
2014-05-0525000201ND
2014-05-0525000401ND
2014-05-0524994801ND
2014-05-135810-075-1150ND
2014-05-135810-076-1150ND
2014-05-135810-077-1210ND
2014-06-115810-075-1230ND
2014-06-115810-076-1230ND
2014-06-115810-077-1230ND
2014-06-1825824401ND
2014-07-095810-075-1000ND
2014-07-095810-076-1000ND
2014-07-095810-077-1000ND
2014-07-095810-083-1000ND
2014-08-075810-075-1200ND
2014-08-075810-076-1220ND
2014-08-075810-077-1150ND
2014-09-085810-075-1330ND
2014-09-085810-076-1335ND
2014-09-085810-077-1345ND
2014-10-085810-075-1110ND
2014-10-085810-076-1045ND
2014-10-085810-077-1015ND
2014-10-095810-083-1130ND
2014-11-045810-075-1325ND
2014-11-045810-076-1330ND
2014-11-045810-077-1400ND
2014-12-105810-075-1040ND
2014-12-105810-076-1110ND
2014-12-105810-077-1000ND
2014-12-1628049401ND
2014-12-1626924901ND
2014-12-1626925201ND
2015-01-065810-075-1053ND
2015-01-065810-076-1105ND
2015-01-065810-077-1040ND
2015-02-185810-075-1325ND
2015-02-185810-076-1330ND
2015-03-045810-075-1035ND
2015-03-045810-076-1045ND
2015-04-095810-075-1035ND
2015-04-095810-076-1040ND
2015-05-0429260201ND
2015-05-115810-075-1315ND
2015-05-115810-076-1300ND
2015-06-025810-075-1025ND
2015-06-025810-076-1035ND
2015-06-1827426301ND
2015-07-095810-075-1115ND
2015-07-095810-076-1120ND
2015-07-2329998701ND
2015-08-115810-075-1027ND
2015-08-115810-076-1035ND
2015-09-165810-075-1000ND
2015-09-165810-076-1005ND
2015-09-295810-083-1325ND
2015-10-135810-075-1120ND
2015-10-135810-076-1125ND
2015-11-035810-075-0850ND
2015-11-035810-076-0900ND
2015-12-085810-075-1240ND
2015-12-085810-076-1250ND
2016-01-205810-075-0950ND
2016-01-205810-076-1005ND
2016-01-205810-077-1015ND
2016-02-035810-075-0909ND
2016-02-035810-076-0920ND
2016-03-025810-075-1100ND
2016-03-025810-076-1115ND
2016-03-025810-083-0930ND
2016-04-075810-075-1150ND
2016-04-075810-076-1155ND
2016-05-115810-075-1115ND
2016-05-115810-076-1120ND
2016-06-095810-075-1410ND
2016-06-095810-076-1400ND
2016-07-065810-075-1105ND
2016-07-065810-076-1110ND
2016-08-035810-075-1311ND
2016-08-035810-076-1305ND
2016-09-065810-075-1225ND
2016-09-065810-076-1230ND
2016-09-085810-083-1010ND
2016-10-045810-075-1015ND
2016-10-045810-076-1020ND
2016-11-075810-075-1115ND
2016-11-075810-076-1125ND
2016-12-075810-075-1035ND
2016-12-075810-076-1045ND
2017-01-125810-075-1355ND
2017-01-125810-076-1410ND
2017-01-125810-077-1343ND
2017-02-075810-075-1120ND
2017-02-075810-076-1125ND
2017-03-085810-075-1340ND
2017-03-085810-076-1330ND
2017-03-085810-083-1315ND
2017-04-175810-075-1035ND
2017-04-175810-076-1040ND
2017-05-105810-075-1020ND
2017-05-105810-076-1010ND
2017-06-145810-075-1051ND
2017-06-145810-076-1108ND
2017-06-145810-083-1037ND
2017-07-205810-075-1034ND
2017-07-205810-076-1047ND
2017-08-105810-075-0915ND
2017-08-105810-076-0929ND
2017-09-145810-075-1445ND
2017-09-145810-083-1500ND
2017-09-205810-076-1210ND
2017-10-165810-075-1055ND
2017-10-165810-076-1052ND
2017-11-165810-075-0920ND
2017-11-165810-076-0915ND
2017-12-045810-075-1210ND
2017-12-045810-076-1200ND
2017-12-045810-083-1140ND
2018-01-115810-075-1125ND
2018-01-115810-077-1205ND
2018-01-115810-083-1155ND
2018-04-305810-075-1040ND
2018-04-305810-076-1000ND
2018-05-075810-075-1122ND
2018-05-075810-076-1130ND
2018-06-125810-075-1125ND
2018-06-195810-076-1030ND
2018-07-255810-075-0955ND
2018-07-255810-076-1015ND
2018-08-015810-075-1130ND
2018-08-015810-076-1140ND
2018-09-125810-075-1125ND
2018-09-125810-076-1120ND
2018-10-015810-075-1340ND
2018-10-015810-076-1345ND
2018-11-085810-075-0915ND
2018-11-085810-076-0910ND
2018-12-045810-075-1120ND
2018-12-045810-076-1125ND
2019-01-095810-075-1155ND
2019-01-095810-076-1205ND
2019-01-095810-077-1140ND
2019-01-095810-083-1130ND
2019-02-055810-075-1005ND
2019-02-055810-076-1010ND
2019-03-265810-075-1418ND
2019-03-265810-076-1418ND