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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Lancaster

NOTE: City of Lancaster purchases water from Dallas Water Utility which is required to test for chloromethane. Sample information shown below was taken by Dallas Water Utility.

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND30ND
2014ND20ND
2015ND20ND
2016ND30ND
2017ND30ND

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

NOTE: City of Lancaster purchases water from Dallas Water Utility which is required to test for chloromethane. Sample information shown below was taken by Dallas Water Utility.

Date Lab ID Result
2012-08-071208403001ND
2012-09-181209775003ND
2012-09-181209775001ND
2013-09-05Q1306618005ND
2013-09-05Q1306618004ND
2013-09-05Q1306618002ND
2014-04-08Q1410915001ND
2014-04-08Q1410915005ND
2014-04-08Q1410915009ND
2014-07-03Q1425969002ND
2014-07-15Q1428070005ND
2014-07-15Q1428070009ND
2014-07-15Q1428070001ND
2014-09-10Q14429900020.770 ppb
2014-09-10Q14429900030.720 ppb
2014-10-21Q1453299005ND
2014-10-21Q1453299009ND
2014-10-21Q1453299001ND
2015-01-13Q1500512005ND
2015-01-13Q1500512009ND
2015-01-13Q1500512001ND
2015-07-08Q1526377021ND
2015-07-08Q1526377019ND
2015-07-08Q1526377022ND
2016-07-07Q1627338001ND
2016-09-14Q1637473004ND
2016-09-14Q1637473001ND
2017-07-10Q1727819009ND
2017-07-10Q1727819018ND
2017-08-23Q1737870004ND