Know Your Environment. Protect Your Health.

Bromodichloromethane

East Lyme Water & Sewer Commission

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

39

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0500 ppb101ND - 0.500 ppb
20190.484 ppb104ND - 2.00 ppb
20201.18 ppb43ND - 2.50 ppb
20211.43 ppb32ND - 2.80 ppb
20222.15 ppb661.000 ppb - 3.10 ppb
20231.62 ppb65ND - 3.00 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-06115854GE0.500 ppb
2018-02-06115853GEND
2018-02-06115856GEND
2018-02-06115855GEND
2018-05-22117860GEND
2018-05-22117861GEND
2018-09-07120043ND
2018-09-07120044ND
2018-12-18121897ND
2018-12-18121898ND
2019-03-06123278ND
2019-03-06123279ND
2019-06-271256731.30 ppb
2019-06-27125674ND
2019-09-101273892.00 ppb
2019-09-101273900.800 ppb
2019-09-10127391ND
2019-12-18129477ND
2019-12-18129475ND
2019-12-181294760.740 ppb
2020-06-12132842ND
2020-06-121328432.50 ppb
2020-06-121328440.900 ppb
2020-06-121328451.30 ppb
2021-07-28141339ND
2021-09-221425521.50 ppb
2021-12-221444362.80 ppb
2022-03-041459581.000 ppb
2022-03-041459591.70 ppb
2022-03-041459573.10 ppb
2022-06-231490012.50 ppb
2022-09-211514472.60 ppb
2022-12-071536612.00 ppb
2023-06-071592151.20 ppb
2023-09-18163136ND
2023-09-181631373.00 ppb
2023-09-181631380.700 ppb
2023-09-181631393.00 ppb
2023-09-181631401.80 ppb