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Chloromethane

El Monte 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

 

267

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND30ND
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019ND40ND
2020ND40ND
2021ND30ND
20220.0426 ppb383ND - 0.600 ppb
20230.0573 ppb21115ND - 1.60 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2014-10-284J28073-03AND
2014-10-284J28073-01AND
2014-10-284J28073-05AND
2015-04-285D28066-03AND
2015-04-285D28066-01AND
2015-04-285D28066-05AND
2018-01-25CA1910038_006_006-201801251130ND
2019-01-31CA1910038_006_006-201901311050ND
2019-05-28CA1910038_045_045-201905281255ND
2019-05-28CA1910038_043_043-201905281310ND
2019-05-28CA1910038_044_044-201905281240ND
2020-02-03CA1910038_006_006-202002031030ND
2020-05-04CA1910038_043_043-202005041030ND
2020-05-04CA1910038_044_044-202005041000ND
2020-05-04CA1910038_045_045-202005041015ND
2021-04-28CA1910038_045_045-202104280950ND
2021-04-28CA1910038_043_043-202104281010ND
2021-04-28CA1910038_044_044-202104280935ND
2022-04-20CA1910038_043_043-202204200910ND
2022-04-20CA1910038_044_044-202204200840ND
2022-04-20CA1910038_045_045-202204200855ND
2022-11-09CA1910038_052_051-202211091005ND
2022-11-09CA1910038_052_046-202211090955ND
2022-11-09CA1910038_052_047-202211091000ND
2022-11-09CA1910038_052_052-2022110910100.600 ppb
2022-11-15CA1910038_052_051-202211151250ND
2022-11-15CA1910038_052_046-202211151240ND
2022-11-15CA1910038_052_047-202211151245ND
2022-11-15CA1910038_052_052-202211151255ND
2022-11-21CA1910038_052_052-202211211215ND
2022-11-21CA1910038_052_047-202211211205ND
2022-11-21CA1910038_052_046-202211211200ND
2022-11-21CA1910038_052_051-202211211210ND
2022-11-29CA1910038_052_046-202211291200ND
2022-11-29CA1910038_052_047-202211291205ND
2022-11-29CA1910038_052_052-202211291215ND
2022-11-29CA1910038_052_051-202211291210ND
2022-12-06CA1910038_045_045-202212060945ND
2022-12-06CA1910038_043_043-202212061045ND
2022-12-06CA1910038_052_051-202212061110ND
2022-12-06CA1910038_052_052-202212061115ND
2022-12-06CA1910038_052_046-202212061045ND
2022-12-06CA1910038_044_044-202212060835ND
2022-12-06CA1910038_052_047-202212061050ND
2022-12-13CA1910038_052_052-202212131200ND
2022-12-13CA1910038_052_046-202212131145ND
2022-12-13CA1910038_052_047-2022121311500.520 ppb
2022-12-13CA1910038_052_051-202212131155ND
2022-12-20CA1910038_052_046-202212201110ND
2022-12-20CA1910038_052_051-202212201120ND
2022-12-20CA1910038_052_048-202212201115ND
2022-12-20CA1910038_052_052-202212201125ND
2022-12-27CA1910038_052_052-202212271315ND
2022-12-27CA1910038_052_051-202212271310ND
2022-12-27CA1910038_052_048-2022122713050.500 ppb
2022-12-27CA1910038_052_046-202212271300ND
2023-01-03CA1910038_052_051-202301031400ND
2023-01-03CA1910038_052_052-202301031405ND
2023-01-03CA1910038_043_043-202301031355ND
2023-01-03CA1910038_044_044-202301031305ND
2023-01-03CA1910038_045_045-2023010313350.690 ppb
2023-01-03CA1910038_052_046-202301031350ND
2023-01-03CA1910038_052_048-202301031355ND
2023-01-11CA1910038_052_046-20230111NULND
2023-01-11CA1910038_052_051-20230111NULND
2023-01-11CA1910038_052_052-202301111230ND
2023-01-11CA1910038_052_049-20230111NULND
2023-01-17CA1910038_052_049-202301171205ND
2023-01-17CA1910038_052_052-202301171215ND
2023-01-17CA1910038_052_046-202301171200ND
2023-01-17CA1910038_052_051-202301171210ND
2023-01-20CA1910038_052_050-202301200835ND
2023-01-24CA1910038_052_050-202301241150ND
2023-01-24CA1910038_052_046-202301241145ND
2023-01-24CA1910038_052_052-202301241200ND
2023-01-24CA1910038_052_051-202301241155ND
2023-01-31CA1910038_052_050-202301311250ND
2023-01-31CA1910038_052_051-202301311255ND
2023-01-31CA1910038_052_052-202301311300ND
2023-01-31CA1910038_052_046-202301311245ND
2023-02-07CA1910038_045_045-202302071035ND
2023-02-07CA1910038_044_044-202302071025ND
2023-02-07CA1910038_052_050-202302071120ND
2023-02-07CA1910038_052_046-202302071115ND
2023-02-07CA1910038_052_052-202302071130ND
2023-02-07CA1910038_043_043-202302071047ND
2023-02-07CA1910038_052_051-202302071125ND
2023-02-14CA1910038_052_050-202302141200ND
2023-02-14CA1910038_052_046-202302141155ND
2023-02-14CA1910038_052_052-202302141210ND
2023-02-14CA1910038_052_051-202302141205ND
2023-02-21CA1910038_052_046-202302211130ND
2023-02-21CA1910038_052_048-202302211135ND
2023-02-21CA1910038_052_051-202302211140ND
2023-02-21CA1910038_052_052-202302211145ND
2023-02-28CA1910038_052_046-202302281100ND
2023-02-28CA1910038_052_051-202302281110ND
2023-02-28CA1910038_052_052-202302281115ND
2023-02-28CA1910038_052_050-202302281105ND
2023-03-07CA1910038_043_043-202303070952ND
2023-03-07CA1910038_045_045-202303070825ND
2023-03-07CA1910038_052_051-202303071115ND
2023-03-07CA1910038_052_046-202303071050ND
2023-03-07CA1910038_052_052-202303071120ND
2023-03-07CA1910038_044_044-202303070733ND
2023-03-07CA1910038_052_050-202303071110ND
2023-03-15CA1910038_052_047-202303151025ND
2023-03-15CA1910038_052_052-202303151035ND
2023-03-15CA1910038_052_046-202303151020ND
2023-03-15CA1910038_052_051-202303151030ND
2023-03-16CA1910038_006_006-202303160935ND
2023-03-20CA1910038_052_046-202303201045ND
2023-03-20CA1910038_052_051-202303201055ND
2023-03-20CA1910038_052_052-202303201100ND
2023-03-20CA1910038_052_047-202303201050ND
2023-03-28CA1910038_052_047-202303281128ND
2023-03-28CA1910038_052_046-202303281120ND
2023-03-28CA1910038_052_051-202303281130ND
2023-03-28CA1910038_052_052-202303281138ND
2023-04-05CA1910038_043_043-202304051020ND
2023-04-05CA1910038_045_045-202304051035ND
2023-04-05CA1910038_052_046-202304051105ND
2023-04-05CA1910038_044_044-202304051050ND
2023-04-05CA1910038_052_047-202304051110ND
2023-04-05CA1910038_052_051-202304051115ND
2023-04-05CA1910038_052_052-202304051120ND
2023-04-11CA1910038_052_046-202304111120ND
2023-04-11CA1910038_052_052-202304111135ND
2023-04-11CA1910038_052_047-202304111125ND
2023-04-11CA1910038_052_051-202304111130ND
2023-04-12CA1910038_044_044-202304121035ND
2023-04-12CA1910038_043_043-202304121105ND
2023-04-12CA1910038_045_045-202304121055ND
2023-04-18CA1910038_052_046-202304181150ND
2023-04-18CA1910038_052_051-202304181200ND
2023-04-18CA1910038_052_052-202304181205ND
2023-04-18CA1910038_052_047-202304181155ND
2023-04-25CA1910038_052_048-202304251100ND
2023-04-25CA1910038_052_051-202304251105ND
2023-04-25CA1910038_052_052-202304251110ND
2023-04-25CA1910038_052_046-202304251055ND
2023-05-16CA1910038_052_051-202305161115ND
2023-05-16CA1910038_052_046-202305161105ND
2023-05-16CA1910038_052_048-202305161110ND
2023-05-16CA1910038_052_052-202305161120ND
2023-05-23CA1910038_052_050-202305231110ND
2023-05-23CA1910038_052_052-202305231120ND
2023-05-23CA1910038_052_051-202305231115ND
2023-05-23CA1910038_052_046-202305231105ND
2023-05-30CA1910038_052_052-202305301320ND
2023-05-30CA1910038_052_050-202305301310ND
2023-05-30CA1910038_052_046-202305301305ND
2023-05-30CA1910038_052_051-202305301315ND
2023-06-07CA1910038_044_044-202306070750ND
2023-06-07CA1910038_052_050-202306071015ND
2023-06-07CA1910038_043_043-202306070910ND
2023-06-07CA1910038_052_052-202306071025ND
2023-06-07CA1910038_045_045-202306070836ND
2023-06-07CA1910038_052_051-202306071020ND
2023-06-07CA1910038_052_046-202306071010ND
2023-06-13CA1910038_052_051-202306131150ND
2023-06-13CA1910038_052_046-202306131140ND
2023-06-13CA1910038_052_050-202306131145ND
2023-06-13CA1910038_052_052-202306131155ND
2023-06-20CA1910038_052_046-202306201210ND
2023-06-20CA1910038_052_050-202306201215ND
2023-06-20CA1910038_052_052-202306201225ND
2023-06-20CA1910038_052_051-202306201220ND
2023-06-27CA1910038_052_052-202306271155ND
2023-06-27CA1910038_052_046-202306271140ND
2023-06-27CA1910038_052_050-202306271145ND
2023-06-27CA1910038_052_051-202306271150ND
2023-07-06CA1910038_044_044-202307060830ND
2023-07-06CA1910038_052_046-202307061000ND
2023-07-06CA1910038_052_050-202307061005ND
2023-07-06CA1910038_052_051-202307061010ND
2023-07-06CA1910038_043_043-202307060855ND
2023-07-06CA1910038_045_045-202307060843ND
2023-07-06CA1910038_052_052-202307061015ND
2023-07-11CA1910038_052_047-202307111145ND
2023-07-11CA1910038_052_046-202307111140ND
2023-07-11CA1910038_052_051-202307111150ND
2023-07-11CA1910038_052_052-202307111155ND
2023-07-18CA1910038_052_051-202307181150ND
2023-07-18CA1910038_052_052-202307181155ND
2023-07-18CA1910038_052_050-202307181145ND
2023-07-18CA1910038_052_046-202307181140ND
2023-07-25CA1910038_052_051-202307251240ND
2023-07-25CA1910038_052_052-202307251245ND
2023-07-25CA1910038_052_046-202307251230ND
2023-07-25CA1910038_052_050-202307251235ND
2023-08-02CA1910038_045_045-202308020945ND
2023-08-02CA1910038_052_050-202308021025ND
2023-08-02CA1910038_043_043-202308021000ND
2023-08-02CA1910038_044_044-202308020930ND
2023-08-02CA1910038_052_052-202308021035ND
2023-08-02CA1910038_052_046-202308021020ND
2023-08-02CA1910038_052_051-202308021030ND
2023-08-08CA1910038_052_050-202308081155ND
2023-08-08CA1910038_052_051-202308081200ND
2023-08-08CA1910038_052_046-202308081150ND
2023-08-08CA1910038_052_052-202308081205ND
2023-08-25CA1910038_052_047-2023082508200.650 ppb
2023-08-25CA1910038_052_051-202308250825ND
2023-08-25CA1910038_052_052-202308250830ND
2023-08-25CA1910038_052_046-2023082508150.650 ppb
2023-08-29CA1910038_052_046-2023082911350.720 ppb
2023-08-29CA1910038_052_047-2023082911400.780 ppb
2023-08-29CA1910038_052_051-202308291145ND
2023-08-29CA1910038_052_052-2023082911500.670 ppb
2023-09-06CA1910038_043_043-2023090608500.610 ppb
2023-09-06CA1910038_052_048-202309061050ND
2023-09-06CA1910038_044_044-202309060809ND
2023-09-06CA1910038_052_046-202309061045ND
2023-09-06CA1910038_052_052-202309061100ND
2023-09-06CA1910038_045_045-202309060830ND
2023-09-06CA1910038_052_051-2023090610551.20 ppb
2023-09-12CA1910038_052_046-202309121055ND
2023-09-12CA1910038_052_051-202309121105ND
2023-09-12CA1910038_052_052-202309121110ND
2023-09-12CA1910038_052_047-202309121100ND
2023-09-19CA1910038_052_051-202309191040ND
2023-09-19CA1910038_052_046-2023091910300.540 ppb
2023-09-19CA1910038_052_052-202309191045ND
2023-09-19CA1910038_052_047-2023091910350.560 ppb
2023-09-26CA1910038_052_046-2023092610151.60 ppb
2023-09-26CA1910038_052_048-202309261020ND
2023-09-26CA1910038_052_052-202309261030ND
2023-09-26CA1910038_052_051-2023092610251.10 ppb
2023-10-03CA1910038_043_043-202310031035ND
2023-10-03CA1910038_044_044-202310031010ND
2023-10-03CA1910038_045_045-202310031020ND
2023-10-03CA1910038_052_046-202310031050ND
2023-10-03CA1910038_052_048-202310031055ND
2023-10-03CA1910038_052_051-202310031100ND
2023-10-03CA1910038_052_052-202310031105ND
2023-10-09CA1910038_052_046-202310090930ND
2023-10-09CA1910038_052_048-2023100909350.850 ppb
2023-10-09CA1910038_052_051-202310090940ND
2023-10-09CA1910038_052_052-202310090945ND
2023-10-17CA1910038_052_051-2023101711500.820 ppb
2023-10-17CA1910038_052_052-202310171155ND
2023-10-17CA1910038_052_048-202310171145ND
2023-10-17CA1910038_052_046-2023101711400.660 ppb
2023-10-31CA1910038_052_046-202310311105ND
2023-10-31CA1910038_052_048-202310311105ND
2023-10-31CA1910038_052_051-202310311110ND
2023-10-31CA1910038_052_052-202310311115ND
2023-11-06CA1910038_043_043-202311060904ND
2023-11-06CA1910038_044_044-202311060822ND
2023-11-06CA1910038_052_046-202311060930ND
2023-11-06CA1910038_052_052-202311060945ND
2023-11-06CA1910038_045_045-202311060847ND
2023-11-06CA1910038_052_050-202311060935ND
2023-11-06CA1910038_052_051-202311060940ND
2023-11-14CA1910038_052_050-202311141035ND
2023-11-14CA1910038_052_052-202311141045ND
2023-11-14CA1910038_052_046-202311141030ND
2023-11-14CA1910038_052_051-202311141040ND
2023-11-21CA1910038_052_052-202311211050ND
2023-11-21CA1910038_052_050-202311211040ND
2023-11-21CA1910038_052_046-202311211035ND
2023-11-21CA1910038_052_051-202311211045ND
2023-11-28CA1910038_052_046-202311281055ND
2023-11-28CA1910038_052_051-202311281105ND
2023-11-28CA1910038_052_050-202311281100ND
2023-11-28CA1910038_052_052-202311281110ND