Know Your Environment. Protect Your Health.

Dibromochloromethane

Lewis County Public Water Supply District 1

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

47

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.51 ppb87ND - 3.73 ppb
20190.974 ppb880.680 ppb - 1.45 ppb
20201.27 ppb880.790 ppb - 1.83 ppb
20211.01 ppb880.740 ppb - 1.31 ppb
20221.29 ppb880.860 ppb - 1.84 ppb
20232.01 ppb881.11 ppb - 2.75 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 Lab ID Result
2018-03-16AD176810.720 ppb
2018-03-16AD176820.620 ppb
2018-05-16AD204651.72 ppb
2018-05-16AD204661.65 ppb
2018-08-13AD311403.73 ppb
2018-08-13AD311413.11 ppb
2018-11-12AD356750.510 ppb
2018-11-12AD35676ND
2019-02-13AD393430.690 ppb
2019-02-13AD393440.680 ppb
2019-05-15AD474240.740 ppb
2019-05-15AD474250.770 ppb
2019-08-19AD538661.42 ppb
2019-08-19AD538651.45 ppb
2019-11-18AD580501.06 ppb
2019-11-18AD580510.980 ppb
2020-02-1020019970.790 ppb
2020-02-1020019960.790 ppb
2020-05-2120088611.25 ppb
2020-05-2120088601.20 ppb
2020-08-1720142491.79 ppb
2020-08-1720142501.83 ppb
2020-11-2220179911.30 ppb
2020-11-2220179901.20 ppb
2021-02-0921006351.15 ppb
2021-02-0921006340.920 ppb
2021-05-1421109060.740 ppb
2021-05-1421109050.790 ppb
2021-08-1621152510.960 ppb
2021-08-1621152500.910 ppb
2021-11-1221194781.31 ppb
2021-11-1221194791.27 ppb
2022-02-1122019281.02 ppb
2022-02-1122019290.870 ppb
2022-05-1322115220.860 ppb
2022-05-1322115230.920 ppb
2022-08-1022162111.58 ppb
2022-08-1022162101.41 ppb
2022-11-1522211301.84 ppb
2022-11-1522211311.81 ppb
2023-02-1523005501.11 ppb
2023-02-2723015241.38 ppb
2023-05-1123080961.35 ppb
2023-05-1123080971.54 ppb
2023-08-0823132762.67 ppb
2023-08-0823132752.75 ppb
2023-11-1023182382.62 ppb
2023-11-1023182372.69 ppb