Know Your Environment. Protect Your Health.

Bromodichloromethane

South Grafton Water District

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.

 

52

Samples

0

Samples exceeding legal limit (MCL)

34

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.29 ppb550.710 ppb - 2.40 ppb
20195.00 ppb331.70 ppb - 7.60 ppb
20203.40 ppb440.700 ppb - 5.80 ppb
20214.76 ppb551.90 ppb - 7.60 ppb
20222.30 ppb74ND - 6.80 ppb
20231.71 ppb2813ND - 8.20 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 Result
2018-01-081.40 ppb
2018-02-051.20 ppb
2018-03-050.750 ppb
2018-04-022.40 ppb
2018-04-020.710 ppb
2019-05-061.70 ppb
2019-08-055.70 ppb
2019-11-047.60 ppb
2020-05-045.80 ppb
2020-05-041.60 ppb
2020-08-035.50 ppb
2020-11-020.700 ppb
2021-02-012.30 ppb
2021-05-101.90 ppb
2021-05-104.40 ppb
2021-08-027.60 ppb
2021-11-017.60 ppb
2022-02-072.00 ppb
2022-05-026.80 ppb
2022-08-012.40 ppb
2022-09-06ND
2022-10-03ND
2022-11-07ND
2022-11-074.90 ppb
2023-02-06ND
2023-02-06ND
2023-02-065.30 ppb
2023-02-063.70 ppb
2023-03-06ND
2023-03-06ND
2023-04-03ND
2023-04-03ND
2023-05-01ND
2023-05-01ND
2023-05-013.10 ppb
2023-05-01ND
2023-05-016.10 ppb
2023-06-12ND
2023-06-12ND
2023-07-10ND
2023-07-10ND
2023-08-070.800 ppb
2023-08-070.800 ppb
2023-08-075.90 ppb
2023-08-073.20 ppb
2023-09-051.000 ppb
2023-09-051.000 ppb
2023-10-02ND
2023-11-061.000 ppb
2023-11-068.20 ppb
2023-11-067.80 ppb
2023-12-04ND