Know Your Environment. Protect Your Health.

Dibromochloromethane

South Grafton Water District

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.

 

76

Samples

0

Samples exceeding legal limit (MCL)

54

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.31 ppb14140.540 ppb - 4.80 ppb
20191.52 ppb12120.600 ppb - 7.10 ppb
20202.18 ppb990.610 ppb - 5.90 ppb
20214.14 ppb660.650 ppb - 6.70 ppb
20222.03 ppb75ND - 6.30 ppb
20231.39 ppb288ND - 6.40 ppb

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 Result
2018-01-081.70 ppb
2018-02-051.30 ppb
2018-03-051.10 ppb
2018-04-024.80 ppb
2018-04-020.850 ppb
2018-04-021.10 ppb
2018-05-070.580 ppb
2018-06-110.800 ppb
2018-07-090.540 ppb
2018-08-061.10 ppb
2018-09-041.30 ppb
2018-10-091.20 ppb
2018-11-190.940 ppb
2018-12-031.000 ppb
2019-01-070.960 ppb
2019-02-041.000 ppb
2019-03-050.850 ppb
2019-04-020.870 ppb
2019-05-060.840 ppb
2019-05-063.10 ppb
2019-06-030.830 ppb
2019-07-010.600 ppb
2019-09-030.620 ppb
2019-11-040.730 ppb
2019-11-047.10 ppb
2019-12-090.690 ppb
2020-01-060.610 ppb
2020-05-040.820 ppb
2020-05-042.90 ppb
2020-05-045.90 ppb
2020-05-040.650 ppb
2020-07-070.780 ppb
2020-08-035.50 ppb
2020-09-010.930 ppb
2020-11-021.50 ppb
2021-01-220.650 ppb
2021-02-013.30 ppb
2021-05-104.60 ppb
2021-05-103.00 ppb
2021-08-026.70 ppb
2021-11-016.60 ppb
2022-02-072.20 ppb
2022-05-026.30 ppb
2022-08-013.50 ppb
2022-09-060.590 ppb
2022-10-03ND
2022-11-07ND
2022-11-071.60 ppb
2023-02-064.70 ppb
2023-02-06ND
2023-02-06ND
2023-02-063.60 ppb
2023-03-06ND
2023-03-06ND
2023-04-03ND
2023-04-03ND
2023-05-015.80 ppb
2023-05-01ND
2023-05-013.50 ppb
2023-05-01ND
2023-05-01ND
2023-06-12ND
2023-06-12ND
2023-07-10ND
2023-07-10ND
2023-08-07ND
2023-08-073.40 ppb
2023-08-075.30 ppb
2023-08-07ND
2023-09-05ND
2023-09-05ND
2023-10-02ND
2023-11-06ND
2023-11-066.40 ppb
2023-11-066.10 ppb
2023-12-04ND