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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Carson City Public Works

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.

 

76

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND330ND
2016ND10ND
2017ND40ND
2018ND200ND
2019ND60ND

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
2014-02-24201402260926-VND
2014-05-27201405280593-VND
2014-07-01201407020370ND
2014-08-11201408130731AMND
2014-08-11201408130733AMND
2014-08-12201408130810AMND
2014-08-12201408130648AMND
2014-08-12201408130686AMND
2014-08-12201408130822AMND
2014-08-12201408130669AMND
2014-09-04201409050252ND
2014-11-24201411250372AMND
2015-02-23201502240532AMND
2015-02-23201502240536AMND
2015-02-23201502240530AMND
2015-02-23201502240586AMND
2015-02-24201502250934AMND
2015-02-24201502250915AMND
2015-05-12201505130627AMND
2015-05-19201505210392VND
2015-05-19201505210480VND
2015-05-19201505210341VND
2015-05-19201505210388VND
2015-05-20201505210412VND
2015-05-20201505210405-VOCND
2015-05-20201505210403VND
2015-05-21201505220242VND
2015-05-21201505220202VND
2015-05-21201505220247-VOCND
2015-06-01201506030333-VOCND
2015-06-012015506030247-VOND
2015-06-01201506030355-VOCND
2015-06-01201506030407-VOCND
2015-06-09201506120280-VOCND
2015-06-09201506120278-VOCND
2015-06-11201506120140-VOCND
2015-06-11201506120209-VOCND
2015-06-29201506300124-VOCND
2015-06-29201506300177-VOCND
2015-06-30201507010430-VOCND
2015-06-30201507160442-VOCND
2015-08-03201508040410-VOCND
2015-08-04201508050421-VOCND
2015-08-10201508110263-VOCND
2015-09-15201509020134-VOCND
2016-06-22201606230265-VOCND
2017-05-15201705160571ND
2017-05-16201705170782-VOCND
2017-05-23201705240769ND
2017-06-21201706220614ND
2018-04-26201804300373ND
2018-05-15201805161020ND
2018-05-24201805250730ND
2018-05-30201805310575ND
2018-05-31201806010519ND
2018-07-23201807240376ND
2018-08-09201808110163ND
2018-08-14201808160455ND
2018-08-14201808160451ND
2018-09-13201809140813-VOCND
2018-09-13201809140770ND
2018-09-18201809190678ND
2018-09-19201809200852ND
2018-10-16201810170779ND
2018-10-16201810170780ND
2018-10-16201810180738AND
2018-10-16201810180748AND
2018-10-17201810190329AND
2018-10-18201810190370AND
2018-11-26201811270444ND
2019-06-24201906250202AND
2019-06-26201906270391ND
2019-08-21201908220455AND
2019-08-22201908230667AND
2019-09-24201909250649AND
2019-09-24201909250291ND