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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Pico Rivera Water Department

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

 

78

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND120ND
2014ND180ND
2015ND130ND
2016ND110ND
2017ND90ND
2018ND70ND
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
2013-01-24440-36162-5ND
2013-01-24440-36162-1ND
2013-01-24440-36162-11ND
2013-01-24440-36162-7ND
2013-01-24440-36162-3ND
2013-01-24440-36162-9ND
2013-07-302869009ND
2013-07-302869039ND
2013-07-302868991ND
2013-07-302869000ND
2013-07-302869027ND
2013-07-302869018ND
2014-01-219588-002-1000ND
2014-01-239588-006-0920ND
2014-01-309588-012-1020ND
2014-01-314A31062-01AND
2014-04-239588-002-0950ND
2014-04-239588-008-1035ND
2014-04-249588-007-0939ND
2014-04-249588-012-1029ND
2014-06-044F04050-01AND
2014-06-194F19089-01AND
2014-07-304G30066-01AND
2014-07-304G30066-03AND
2014-09-169588-005-1119ND
2014-09-169588-004-1105ND
2014-09-169588-002-1002ND
2014-12-179588-002-0954ND
2014-12-189588-009-1024ND
2014-12-189588-012-1050ND
2015-02-269588-006-0958ND
2015-02-269588-002-1006ND
2015-03-059588-012-0906ND
2015-04-159588-007-1028ND
2015-04-159588-002-0941ND
2015-04-159588-008-1017ND
2015-04-299588-012-0940ND
2015-07-279588-002-0949ND
2015-07-279588-005-1120ND
2015-07-279588-004-1145ND
2015-07-289588-012-1109ND
2015-10-149588-009-0917ND
2015-10-149588-012-1033ND
2016-03-229588-006-0901ND
2016-03-249588-012-0940ND
2016-05-099588-012-1115ND
2016-05-099588-007-1015ND
2016-05-099588-008-1000ND
2016-07-219588-005-0950ND
2016-07-219588-004-1015ND
2016-07-219588-012-1105ND
2016-07-219588-002-0844ND
2016-11-099588-009-1144ND
2016-11-099588-012-0943ND
2017-02-099588-012-0945ND
2017-02-099588-006-1105ND
2017-04-249588-008-1015ND
2017-04-249588-007-1025ND
2017-07-259588-002-0937ND
2017-07-259588-004-1046ND
2017-07-259588-005-1027ND
2017-10-109588-009-1045ND
2017-10-109588-004-1120ND
2018-01-159588-006-0923ND
2018-04-179588-007-1010ND
2018-04-179588-008-1035ND
2018-07-269588-005-1040ND
2018-07-269588-004-1100ND
2018-07-269588-002-0919ND
2018-10-199588-009-1030ND
2019-01-309588-006-0900ND
2019-05-099588-008-0915ND
2019-05-239588-007-0920ND
2019-08-089588-004-1045ND
2019-08-089588-005-1035ND
2019-08-089588-002-0905ND
2019-11-259588-002-0840ND
2019-11-259588-009-1140ND