Know Your Environment. Protect Your Health.

Chloromethane

City of Giddings

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20187.65 ppb226.50 ppb - 8.80 ppb
20197.75 ppb224.50 ppb - 11.0 ppb
20205.70 ppb223.50 ppb - 7.90 ppb
20216.70 ppb223.40 ppb - 10.00 ppb
20225.40 ppb224.80 ppb - 6.00 ppb
20238.80 ppb227.70 ppb - 9.90 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
2018-06-14AE300446.50 ppb
2018-06-14AE300468.80 ppb
2019-06-12AE7035311.0 ppb
2019-06-12AE703594.50 ppb
2020-06-15AF152183.50 ppb
2020-06-15AF152227.90 ppb
2021-05-06AF528033.40 ppb
2021-05-06AF5280710.00 ppb
2022-10-12AG168596.00 ppb
2022-10-12AG168614.80 ppb
2023-03-01AG309619.90 ppb
2023-03-01AG309637.70 ppb