Know Your Environment. Protect Your Health.

Dibromochloromethane

Norwich Public Utilities

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

 

17

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.400 ppb32ND - 0.630 ppb
20190.547 ppb32ND - 0.900 ppb
20200.217 ppb31ND - 0.650 ppb
2021ND20ND
20220.173 ppb31ND - 0.520 ppb
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2018-09-18PH-0453-6304497VOC10.570 ppb
2018-09-18PH-0453-6304496VOC10.630 ppb
2018-10-03PH-0453-6304498VOC1ND
2019-08-29PH-0453-6305609VOC10.740 ppb
2019-08-29PH-0453-6305611VOC1ND
2019-09-16PH-0453-6305610VOC10.900 ppb
2020-07-09PH-0453-6306438VOC1ND
2020-07-09PH-0453-6306437VOC1ND
2020-07-09PH-0453-6306436VOC10.650 ppb
2021-06-07PH-0453-6307352VOC1ND
2021-06-23PH-0453-6307354VOC1ND
2022-01-18PH-0453-6307960VOC1ND
2022-02-03PH-0453-6307962VOC1ND
2022-11-29PH-0453-6307961VOC10.520 ppb
2023-11-14D3K1545-01VOCND
2023-11-14D3K1545-02VOCND
2023-11-14D3K1545-03VOCND