Dibromochloromethane
Bristol Water Department
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.961 ppb | 36 | 36 | 0.500 ppb - 1.80 ppb |
| 2019 | 1.05 ppb | 36 | 36 | 0.640 ppb - 1.86 ppb |
| 2020 | 1.03 ppb | 36 | 34 | ND - 2.23 ppb |
| 2021 | 0.917 ppb | 36 | 35 | ND - 2.72 ppb |
| 2022 | 0.898 ppb | 40 | 36 | ND - 2.36 ppb |
| 2023 | 0.864 ppb | 36 | 33 | ND - 2.62 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 |
|---|---|---|
| 2018-01-10 | D8A0568-01VOC | 0.600 ppb |
| 2018-01-10 | D8A0568-04VOC | 0.500 ppb |
| 2018-01-10 | D8A0568-03VOC | 0.900 ppb |
| 2018-01-10 | D8A0568-02VOC | 1.10 ppb |
| 2018-02-01 | D8B0050-01VOC | 0.800 ppb |
| 2018-02-01 | D8B0050-02VOC | 0.800 ppb |
| 2018-02-01 | D8B0050-03VOC | 1.20 ppb |
| 2018-02-01 | D8B0050-04VOC | 1.40 ppb |
| 2018-02-01 | D8B0050-05VOC | 1.80 ppb |
| 2018-02-01 | D8B0050-06VOC | 0.800 ppb |
| 2018-02-01 | D8B0050-07VOC | 0.900 ppb |
| 2018-02-01 | D8B0050-08VOC | 1.000 ppb |
| 2018-05-02 | D8E0293-01VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-02VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-03VOC | 1.10 ppb |
| 2018-05-02 | D8E0293-04VOC | 1.30 ppb |
| 2018-05-02 | D8E0293-05VOC | 1.50 ppb |
| 2018-05-02 | D8E0293-06VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-07VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-08VOC | 0.700 ppb |
| 2018-08-03 | D8H0465-01VOC | 0.800 ppb |
| 2018-08-03 | D8H0465-02VOC | 0.800 ppb |
| 2018-08-03 | D8H0465-03VOC | 1.000 ppb |
| 2018-08-03 | D8H0465-04VOC | 1.000 ppb |
| 2018-08-03 | D8H0465-05VOC | 0.900 ppb |
| 2018-08-03 | D8H0465-06VOC | 0.700 ppb |
| 2018-08-03 | D8H0465-07VOC | 0.700 ppb |
| 2018-08-03 | D8H0465-08VOC | 0.900 ppb |
| 2018-11-21 | D8K2218-01VOC | 1.10 ppb |
| 2018-11-21 | D8K2218-02VOC | 1.10 ppb |
| 2018-11-21 | D8K2218-03VOC | 1.30 ppb |
| 2018-11-21 | D8K2218-04VOC | 1.20 ppb |
| 2018-11-21 | D8K2218-05VOC | 1.000 ppb |
| 2018-11-21 | D8K2218-06VOC | 1.000 ppb |
| 2018-11-21 | D8K2218-07VOC | 0.900 ppb |
| 2018-11-21 | D8K2218-08VOC | 1.000 ppb |
| 2019-02-07 | D9B0625-01VOC | 0.940 ppb |
| 2019-02-07 | D9B0625-02VOC | 1.07 ppb |
| 2019-02-07 | D9B0625-03VOC | 1.32 ppb |
| 2019-02-07 | D9B0625-04VOC | 1.52 ppb |
| 2019-02-07 | D9B0625-05VOC | 1.86 ppb |
| 2019-02-07 | D9B0625-06VOC | 0.820 ppb |
| 2019-02-07 | D9B0625-07VOC | 0.880 ppb |
| 2019-02-07 | D9B0625-08VOC | 0.950 ppb |
| 2019-05-16 | D9E1857-01VOC | 0.840 ppb |
| 2019-05-16 | D9E1857-02VOC | 0.740 ppb |
| 2019-05-16 | D9E1857-03VOC | 0.780 ppb |
| 2019-05-16 | D9E1857-04VOC | 1.03 ppb |
| 2019-05-16 | D9E1857-05VOC | 1.61 ppb |
| 2019-05-16 | D9E1857-06VOC | 0.660 ppb |
| 2019-05-16 | D9E1857-07VOC | 0.640 ppb |
| 2019-05-16 | D9E1857-08VOC | 0.800 ppb |
| 2019-08-22 | D9H2728-01VOC | 1.24 ppb |
| 2019-08-22 | D9H2728-02VOC | 1.34 ppb |
| 2019-08-22 | D9H2728-03VOC | 1.44 ppb |
| 2019-08-22 | D9H2728-04VOC | 1.33 ppb |
| 2019-08-22 | D9H2728-05VOC | 1.35 ppb |
| 2019-08-22 | D9H2728-06VOC | 1.06 ppb |
| 2019-08-22 | D9H2728-07VOC | 1.44 ppb |
| 2019-08-22 | D9H2728-08VOC | 1.29 ppb |
| 2019-10-28 | D9J2584-01VOC | 0.770 ppb |
| 2019-10-28 | D9J2584-04VOC | 0.800 ppb |
| 2019-10-28 | D9J2584-03VOC | 1.18 ppb |
| 2019-10-28 | D9J2584-02VOC | 1.37 ppb |
| 2019-11-20 | D9K1863-01VOC | 0.920 ppb |
| 2019-11-20 | D9K1863-02VOC | 0.790 ppb |
| 2019-11-20 | D9K1863-03VOC | 0.800 ppb |
| 2019-11-20 | D9K1863-04VOC | 0.910 ppb |
| 2019-11-20 | D9K1863-05VOC | 0.710 ppb |
| 2019-11-20 | D9K1863-06VOC | 0.750 ppb |
| 2019-11-20 | D9K1863-07VOC | 0.730 ppb |
| 2019-11-20 | D9K1863-08VOC | 0.960 ppb |
| 2020-02-07 | D0B0593-01VOC | 0.730 ppb |
| 2020-02-07 | D0B0593-02VOC | 0.770 ppb |
| 2020-02-07 | D0B0593-03VOC | 0.770 ppb |
| 2020-02-07 | D0B0593-04VOC | 1.79 ppb |
| 2020-02-07 | D0B0593-05VOC | 1.52 ppb |
| 2020-02-07 | D0B0593-06VOC | 0.540 ppb |
| 2020-02-07 | D0B0593-07VOC | 0.780 ppb |
| 2020-02-07 | D0B0593-08VOC | 0.740 ppb |
| 2020-04-15 | D0D1376-01VOC | 0.640 ppb |
| 2020-04-15 | D0D1376-02VOC | 0.590 ppb |
| 2020-04-15 | D0D1376-03VOC | 1.06 ppb |
| 2020-04-15 | D0D1376-04VOC | 2.15 ppb |
| 2020-04-15 | D0D1376-05VOC | 0.940 ppb |
| 2020-04-15 | D0D1376-06VOC | ND |
| 2020-04-15 | D0D1376-07VOC | 0.890 ppb |
| 2020-04-15 | D0D1376-08VOC | 0.650 ppb |
| 2020-08-13 | D0H1367-01VOC | 0.940 ppb |
| 2020-08-13 | D0H1367-02VOC | 0.970 ppb |
| 2020-08-13 | D0H1367-03VOC | 1.03 ppb |
| 2020-08-13 | D0H1367-04VOC | 1.48 ppb |
| 2020-08-13 | D0H1367-05VOC | 1.66 ppb |
| 2020-08-13 | D0H1367-06VOC | 0.910 ppb |
| 2020-08-13 | D0H1367-07VOC | 0.810 ppb |
| 2020-08-13 | D0H1367-08VOC | 1.03 ppb |
| 2020-11-18 | D0K1639-01VOC | 1.17 ppb |
| 2020-11-18 | D0K1639-02VOC | 1.48 ppb |
| 2020-11-18 | D0K1639-03VOC | 1.94 ppb |
| 2020-11-18 | D0K1639-04VOC | 1.59 ppb |
| 2020-11-18 | D0K1639-05VOC | 2.23 ppb |
| 2020-11-18 | D0K1639-06VOC | 0.810 ppb |
| 2020-11-18 | D0K1639-07VOC | 0.750 ppb |
| 2020-11-18 | D0K1639-08VOC | 1.32 ppb |
| 2020-11-19 | D0K1813-01VOC | ND |
| 2020-11-19 | D0K1813-02VOC | 0.660 ppb |
| 2020-11-19 | D0K1813-03VOC | 0.850 ppb |
| 2020-11-19 | D0K1813-04VOC | 0.970 ppb |
| 2021-02-11 | D1B1051-01VOC | 0.700 ppb |
| 2021-02-11 | D1B1051-02VOC | 0.810 ppb |
| 2021-02-11 | D1B1051-03VOC | ND |
| 2021-02-11 | D1B1051-04VOC | 1.40 ppb |
| 2021-02-11 | D1B1051-05VOC | 1.25 ppb |
| 2021-02-11 | D1B1051-06VOC | 0.510 ppb |
| 2021-02-11 | D1B1051-07VOC | 0.590 ppb |
| 2021-02-11 | D1B1051-08VOC | 0.700 ppb |
| 2021-05-12 | D1E1461-01VOC | 0.560 ppb |
| 2021-05-12 | D1E1461-02VOC | 0.590 ppb |
| 2021-05-12 | D1E1461-03VOC | 0.930 ppb |
| 2021-05-12 | D1E1461-04VOC | 2.72 ppb |
| 2021-05-12 | D1E1461-05VOC | 0.560 ppb |
| 2021-05-12 | D1E1461-06VOC | 0.550 ppb |
| 2021-05-12 | D1E1461-07VOC | 0.650 ppb |
| 2021-05-21 | D1E2270-01VOC | 0.580 ppb |
| 2021-08-11 | D1H1184-01VOC | 1.22 ppb |
| 2021-08-11 | D1H1184-02VOC | 1.34 ppb |
| 2021-08-11 | D1H1184-03VOC | 1.23 ppb |
| 2021-08-11 | D1H1184-04VOC | 1.46 ppb |
| 2021-08-11 | D1H1184-05VOC | 1.05 ppb |
| 2021-08-11 | D1H1184-06VOC | 0.800 ppb |
| 2021-08-11 | D1H1184-07VOC | 1.17 ppb |
| 2021-08-11 | D1H1184-08VOC | 1.09 ppb |
| 2021-08-12 | D1H1346-01VOC | 0.940 ppb |
| 2021-08-12 | D1H1346-02VOC | 0.850 ppb |
| 2021-08-12 | D1H1346-03VOC | 0.960 ppb |
| 2021-08-12 | D1H1346-04VOC | 1.15 ppb |
| 2021-11-10 | D1K0958-01VOC | 0.800 ppb |
| 2021-11-10 | D1K0958-02VOC | 0.930 ppb |
| 2021-11-10 | D1K0958-03VOC | 0.900 ppb |
| 2021-11-10 | D1K0958-04VOC | 0.830 ppb |
| 2021-11-10 | D1K0958-05VOC | 0.710 ppb |
| 2021-11-10 | D1K0958-06VOC | 0.610 ppb |
| 2021-11-10 | D1K0958-07VOC | 0.700 ppb |
| 2021-11-10 | D1K0958-08VOC | 1.16 ppb |
| 2022-02-03 | D2B0370-01VOC | 1.03 ppb |
| 2022-02-03 | D2B0370-02VOC | 1.04 ppb |
| 2022-02-03 | D2B0370-03VOC | 1.20 ppb |
| 2022-02-03 | D2B0370-04VOC | 0.890 ppb |
| 2022-02-03 | D2B0370-05VOC | 1.38 ppb |
| 2022-02-03 | D2B0370-06VOC | 0.890 ppb |
| 2022-02-03 | D2B0370-07VOC | 1.03 ppb |
| 2022-02-03 | D2B0370-08VOC | 0.990 ppb |
| 2022-05-18 | D2E1713-01VOC | 0.850 ppb |
| 2022-05-18 | D2E1713-02VOC | 0.830 ppb |
| 2022-05-18 | D2E1713-03VOC | 1.000 ppb |
| 2022-05-18 | D2E1713-04VOC | 1.12 ppb |
| 2022-05-18 | D2E1713-05VOC | 1.18 ppb |
| 2022-05-18 | D2E1713-06VOC | 0.780 ppb |
| 2022-05-18 | D2E1713-07VOC | 0.750 ppb |
| 2022-05-18 | D2E1713-08VOC | 0.740 ppb |
| 2022-08-12 | D2H1764-01VOC | 0.870 ppb |
| 2022-08-12 | D2H1764-02VOC | 0.880 ppb |
| 2022-08-12 | D2H1764-03VOC | 1.07 ppb |
| 2022-08-12 | D2H1764-04VOC | 0.930 ppb |
| 2022-08-12 | D2H1764-05VOC | 0.820 ppb |
| 2022-08-12 | D2H1764-06VOC | 0.910 ppb |
| 2022-08-12 | D2H1764-07VOC | 0.730 ppb |
| 2022-08-12 | D2H1764-08VOC | 0.990 ppb |
| 2022-11-21 | D2K1963-01VOC | 0.920 ppb |
| 2022-11-21 | D2K1963-02VOC | 0.870 ppb |
| 2022-11-21 | D2K1963-03VOC | 0.770 ppb |
| 2022-11-21 | D2K1963-04VOC | 0.900 ppb |
| 2022-11-21 | D2K1963-05VOC | 2.10 ppb |
| 2022-11-21 | D2K1963-06VOC | 1.11 ppb |
| 2022-11-21 | D2K1963-07VOC | 0.620 ppb |
| 2022-11-21 | D2K1963-08VOC | 0.870 ppb |
| 2022-11-21 | D2K1965-01VOC | 0.660 ppb |
| 2022-11-21 | D2K1965-04VOC | ND |
| 2022-11-21 | D2K1965-05VOC | ND |
| 2022-11-21 | D2K1965-02VOC | 0.640 ppb |
| 2022-11-21 | D2K1965-03VOC | 1.20 ppb |
| 2022-11-21 | D2K1965-06VOC | ND |
| 2022-11-28 | D2K2374-01VOC | 2.36 ppb |
| 2022-11-28 | D2K2374-02VOC | ND |
| 2023-02-09 | D3B1063-01VOC | 0.620 ppb |
| 2023-02-09 | D3B1063-02VOC | 0.720 ppb |
| 2023-02-09 | D3B1063-03VOC | 0.600 ppb |
| 2023-02-09 | D3B1063-04VOC | 2.62 ppb |
| 2023-02-09 | D3B1063-05VOC | 1.75 ppb |
| 2023-02-09 | D3B1063-06VOC | 0.630 ppb |
| 2023-02-09 | D3B1063-07VOC | 0.600 ppb |
| 2023-02-09 | D3B1063-08VOC | 0.500 ppb |
| 2023-03-06 | D3C0654-01VOC | ND |
| 2023-03-06 | D3C0654-02VOC | ND |
| 2023-03-06 | D3C0654-03VOC | 0.660 ppb |
| 2023-03-15 | D3C1373-01VOC | 0.960 ppb |
| 2023-05-10 | D3E1137-01VOC | 0.530 ppb |
| 2023-05-10 | D3E1137-02VOC | 0.620 ppb |
| 2023-05-10 | D3E1137-03VOC | 0.650 ppb |
| 2023-05-10 | D3E1137-04VOC | 1.37 ppb |
| 2023-05-10 | D3E1137-05VOC | 1.64 ppb |
| 2023-05-10 | D3E1137-06VOC | 0.570 ppb |
| 2023-05-10 | D3E1137-07VOC | ND |
| 2023-05-10 | D3E1137-08VOC | 0.570 ppb |
| 2023-08-16 | D3H2326-01VOC | 1.09 ppb |
| 2023-08-16 | D3H2326-02VOC | 1.13 ppb |
| 2023-08-16 | D3H2326-03VOC | 1.34 ppb |
| 2023-08-16 | D3H2326-04VOC | 1.27 ppb |
| 2023-08-16 | D3H2326-05VOC | 1.05 ppb |
| 2023-08-16 | D3H2326-06VOC | 0.990 ppb |
| 2023-08-16 | D3H2326-07VOC | 0.900 ppb |
| 2023-08-16 | D3H2326-08VOC | 1.15 ppb |
| 2023-11-16 | D3K1914-01VOC | 0.930 ppb |
| 2023-11-16 | D3K1914-02VOC | 0.850 ppb |
| 2023-11-16 | D3K1914-03VOC | 0.850 ppb |
| 2023-11-16 | D3K1914-04VOC | 0.970 ppb |
| 2023-11-16 | D3K1914-05VOC | 0.780 ppb |
| 2023-11-16 | D3K1914-06VOC | 0.800 ppb |
| 2023-11-16 | D3K1914-07VOC | 0.620 ppb |
| 2023-11-16 | D3K1914-08VOC | 0.790 ppb |