Dibromochloromethane
Manchester 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 | 1.88 ppb | 49 | 40 | ND - 9.20 ppb |
| 2019 | 1.47 ppb | 48 | 41 | ND - 5.20 ppb |
| 2020 | 1.44 ppb | 48 | 37 | ND - 7.19 ppb |
| 2021 | 1.23 ppb | 48 | 38 | ND - 6.41 ppb |
| 2022 | 1.49 ppb | 48 | 40 | ND - 6.75 ppb |
| 2023 | 1.31 ppb | 49 | 38 | ND - 5.68 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 |
|---|---|---|
| 2018-01-08 | AA82357-DBP1 | 1.60 ppb |
| 2018-01-08 | AA82358-DBP1 | 1.10 ppb |
| 2018-01-08 | AA82359-DBP1 | 0.700 ppb |
| 2018-01-08 | AA82323-VOC1 | 1.10 ppb |
| 2018-01-08 | AA82328-VOC1 | ND |
| 2018-01-08 | AA82329-VOC1 | ND |
| 2018-01-09 | AA82360-DBP1 | 1.30 ppb |
| 2018-01-09 | AA82343-DBP1 | 1.40 ppb |
| 2018-01-09 | AA82355-DBP1 | 3.40 ppb |
| 2018-01-09 | AA82356-DBP1 | 1.40 ppb |
| 2018-01-09 | AA82347-VOC1 | ND |
| 2018-01-09 | AA82348-VOC1 | 0.600 ppb |
| 2018-01-09 | AA82350-VOC1 | 0.600 ppb |
| 2018-01-10 | AA82378-DBP1 | 1.80 ppb |
| 2018-01-10 | AA82372-VOC1 | ND |
| 2018-01-10 | AA82373-VOC1 | ND |
| 2018-04-10 | AA83453-VOC1 | 0.600 ppb |
| 2018-04-10 | AA83456-VOC1 | ND |
| 2018-04-11 | AA83470-VOC1 | ND |
| 2018-04-16 | AA83526-DBP1 | 2.40 ppb |
| 2018-04-16 | AA83527-DBP1 | 0.800 ppb |
| 2018-04-17 | AA83543-DBP1 | 2.10 ppb |
| 2018-04-17 | AA83544-DBP1 | 1.60 ppb |
| 2018-04-17 | AA83545-DBP1 | 2.10 ppb |
| 2018-04-17 | AA83546-DBP1 | 1.60 ppb |
| 2018-04-17 | AA83547-DBP1 | 2.10 ppb |
| 2018-04-17 | AA83548-DBP1 | 4.60 ppb |
| 2018-07-16 | AA84694-DBP1 | 1.80 ppb |
| 2018-07-16 | AA84706-DBP1 | 4.10 ppb |
| 2018-07-17 | AA84723-DBP1 | 3.80 ppb |
| 2018-07-17 | AA84724-DBP1 | 9.20 ppb |
| 2018-07-17 | AA84725-DBP1 | 3.70 ppb |
| 2018-07-17 | AA84726-DBP1 | 3.20 ppb |
| 2018-07-17 | AA84727-DBP1 | 4.10 ppb |
| 2018-07-17 | AA84729-DBP1 | 3.70 ppb |
| 2018-07-17 | AA84728-VOC1 | 0.800 ppb |
| 2018-07-18 | AA84742-VOC1 | 0.700 ppb |
| 2018-07-18 | AA84743-VOC1 | ND |
| 2018-10-15 | AA85872-DBP1 | 6.90 ppb |
| 2018-10-15 | AA85873-DBP1 | 2.10 ppb |
| 2018-10-15 | AA85874-DBP1 | 3.60 ppb |
| 2018-10-15 | AA85924-DBP1 | 1.50 ppb |
| 2018-10-16 | AA85880-DBP1 | 1.40 ppb |
| 2018-10-16 | AA85882-DBP1 | 1.50 ppb |
| 2018-10-16 | AA85893-DBP1 | 3.00 ppb |
| 2018-10-16 | AA85887-VOC1 | 0.700 ppb |
| 2018-10-17 | AA85906-VOC1 | 0.700 ppb |
| 2018-10-17 | AA85907-VOC1 | ND |
| 2018-10-18 | AA85923-DBP1 | 2.70 ppb |
| 2019-01-14 | AA86944-DBP1 | 1.80 ppb |
| 2019-01-14 | AA86945-DBP1 | 1.20 ppb |
| 2019-01-15 | AA86953-DBP1 | 1.60 ppb |
| 2019-01-15 | AA86960-DBP1 | 1.80 ppb |
| 2019-01-15 | AA86961-DBP1 | 1.60 ppb |
| 2019-01-15 | AA86962-DBP1 | 3.10 ppb |
| 2019-01-15 | AA86956-VOC1 | ND |
| 2019-01-15 | AA86957-VOC1 | 0.610 ppb |
| 2019-01-16 | AA86968-DBP1 | 0.640 ppb |
| 2019-01-16 | AA86978-DBP1 | 1.90 ppb |
| 2019-01-16 | AA86968-VOC1 | 0.630 ppb |
| 2019-01-16 | AA86974-VOC1 | 0.530 ppb |
| 2019-01-16 | AA86975-VOC1 | ND |
| 2019-01-17 | AA86989-VOC1 | ND |
| 2019-01-17 | AA86990-VOC1 | ND |
| 2019-04-15 | AA88012-DBP1 | 0.890 ppb |
| 2019-04-15 | AA88021-DBP1 | 1.68 ppb |
| 2019-04-15 | AA88022-DBP1 | 1.85 ppb |
| 2019-04-15 | AA88023-DBP1 | 2.34 ppb |
| 2019-04-15 | AA88024-DBP1 | 3.17 ppb |
| 2019-04-15 | AA88025-DBP1 | 2.14 ppb |
| 2019-04-17 | AA88059-DBP1 | 2.94 ppb |
| 2019-04-17 | AA88060-DBP1 | 1.92 ppb |
| 2019-04-23 | AA88123-VOC1 | 0.620 ppb |
| 2019-04-24 | AA88139-VOC1 | 1.01 ppb |
| 2019-04-24 | AA88140-VOC1 | ND |
| 2019-07-08 | AA89073-VOC1 | 0.690 ppb |
| 2019-07-08 | AA89074-VOC1 | 0.620 ppb |
| 2019-07-10 | AA89110-VOC1 | ND |
| 2019-07-15 | AA89173-DBP1 | 1.32 ppb |
| 2019-07-15 | AA89174-DBP1 | 5.20 ppb |
| 2019-07-15 | AA89175-DBP1 | 1.99 ppb |
| 2019-07-15 | AA89176-DBP1 | 1.85 ppb |
| 2019-07-15 | AA89177-DBP1 | 1.53 ppb |
| 2019-07-16 | AA89183-DBP1 | 0.810 ppb |
| 2019-07-16 | AA89193-DBP1 | 1.36 ppb |
| 2019-07-16 | AA89194-DBP1 | 2.04 ppb |
| 2019-10-08 | AA90268-VOC1 | 0.590 ppb |
| 2019-10-09 | AA90285-VOC1 | 0.690 ppb |
| 2019-10-09 | AA90287-VOC1 | ND |
| 2019-10-15 | AA90342-DBP1 | 0.800 ppb |
| 2019-10-15 | AA90344-DBP1 | 1.88 ppb |
| 2019-10-15 | AA90353-DBP1 | 2.34 ppb |
| 2019-10-15 | AA90354-DBP1 | 2.30 ppb |
| 2019-10-15 | AA90355-DBP1 | 5.12 ppb |
| 2019-10-15 | AA90356-DBP1 | 1.95 ppb |
| 2019-10-15 | AA90357-DBP1 | 1.50 ppb |
| 2019-10-15 | AA90358-DBP1 | 2.21 ppb |
| 2020-01-13 | AA91414-DBP1 | 1.06 ppb |
| 2020-01-13 | AA91415-DBP1 | 4.13 ppb |
| 2020-01-13 | AA91416-DBP1 | 1.000 ppb |
| 2020-01-14 | AA91431-DBP1 | 0.940 ppb |
| 2020-01-14 | AA91436-DBP1 | 1.04 ppb |
| 2020-01-14 | AA91437-DBP1 | 1.53 ppb |
| 2020-01-15 | AA91452-DBP1 | ND |
| 2020-01-15 | AA91455-DBP1 | 1.22 ppb |
| 2020-01-21 | AA91524-VOC1 | ND |
| 2020-01-21 | AA91525-VOC1 | ND |
| 2020-01-21 | AA91522-VOC1 | ND |
| 2020-01-21 | AA91523-VOC1 | 0.600 ppb |
| 2020-01-21 | AA91526-VOC1 | 0.560 ppb |
| 2020-01-22 | AA91540-VOC1 | ND |
| 2020-01-23 | AA91552-VOC1 | ND |
| 2020-04-14 | AA92514-DBP1 | 0.910 ppb |
| 2020-04-14 | AA92515-DBP1 | 0.540 ppb |
| 2020-04-14 | AA92517-DBP1 | 1.03 ppb |
| 2020-04-14 | AA92529-DBP1 | 1.16 ppb |
| 2020-04-14 | AA92530-DBP1 | 1.000 ppb |
| 2020-04-14 | AA92531-DBP1 | 5.37 ppb |
| 2020-04-14 | AA92532-DBP1 | 1.29 ppb |
| 2020-04-14 | AA92522-VOC1 | ND |
| 2020-04-14 | AA92524-VOC1 | 0.660 ppb |
| 2020-04-15 | AA92551-DBP1 | 1.21 ppb |
| 2020-04-15 | AA92546-VOC1 | ND |
| 2020-07-07 | AA93640-VOC1 | 0.660 ppb |
| 2020-07-07 | AA93643-VOC1 | 0.550 ppb |
| 2020-07-07 | AA93644-VOC1 | ND |
| 2020-07-14 | AA93734-DBP1 | 0.960 ppb |
| 2020-07-14 | AA93738-DBP1 | 1.31 ppb |
| 2020-07-14 | AA93739-DBP1 | 4.50 ppb |
| 2020-07-14 | AA93740-DBP1 | 1.48 ppb |
| 2020-07-14 | AA93741-DBP1 | 1.62 ppb |
| 2020-07-14 | AA93742-DBP1 | 1.12 ppb |
| 2020-07-15 | AA93758-DBP1 | 0.770 ppb |
| 2020-07-15 | AA93771-DBP1 | 1.85 ppb |
| 2020-10-05 | AA95052-DBP1 | 2.31 ppb |
| 2020-10-05 | AA95050-DBP1 | 3.76 ppb |
| 2020-10-05 | AA95051-DBP1 | 2.54 ppb |
| 2020-10-05 | AA95053-DBP1 | 2.86 ppb |
| 2020-10-05 | AA95054-DBP1 | 7.19 ppb |
| 2020-10-06 | AA95060-DBP1 | 1.44 ppb |
| 2020-10-06 | AA95062-DBP1 | 2.90 ppb |
| 2020-10-07 | AA95096-DBP1 | 5.63 ppb |
| 2020-10-13 | AA95168-VOC1 | 0.560 ppb |
| 2020-10-14 | AA95186-VOC1 | ND |
| 2020-10-14 | AA95187-VOC1 | ND |
| 2021-01-12 | 210112-2-02 TTHM | 1.47 ppb |
| 2021-01-12 | 210112-5-01TTHM | 1.18 ppb |
| 2021-01-12 | 210112-5-02TTHM | 1.70 ppb |
| 2021-01-12 | 210112-3-04 VOC | 0.590 ppb |
| 2021-01-13 | 210113-2-02 TTHM | 1.24 ppb |
| 2021-01-13 | 210113-4-01TTHM | 1.15 ppb |
| 2021-01-13 | 210113-4-02TTHM | 1.92 ppb |
| 2021-01-14 | 210114-4-01TTHM | 3.68 ppb |
| 2021-01-14 | 210114-4-02TTHM | 0.650 ppb |
| 2021-01-20 | 210120-3-05 VOC | ND |
| 2021-01-20 | 210120-3-06 VOC | ND |
| 2021-04-05 | 210405-4-01TTHM | 1.54 ppb |
| 2021-04-05 | 210405-4-02TTHM | 1.11 ppb |
| 2021-04-06 | 210406-4-01TTHM | 4.38 ppb |
| 2021-04-06 | 210406-4-02TTHM | 1.45 ppb |
| 2021-04-06 | 210406-4-03TTHM | 1.46 ppb |
| 2021-04-06 | 210406-4-04TTHM | 1.48 ppb |
| 2021-04-07 | 210407-5-01TTHM | 0.550 ppb |
| 2021-04-09 | 210409-3-01TTHM | 1.08 ppb |
| 2021-04-12 | 210412-3-01VOC | ND |
| 2021-04-12 | 210412-3-02 VOC | ND |
| 2021-04-12 | 210412-3-04 VOC | 0.630 ppb |
| 2021-04-12 | 210412-3-05 VOC | 0.600 ppb |
| 2021-04-13 | 210413-3-03 VOC | ND |
| 2021-04-14 | 210414-1-06VOC | ND |
| 2021-04-14 | 210414-3-06VOC | ND |
| 2021-07-13 | 210713-4-01TTHM | 1.03 ppb |
| 2021-07-13 | 210713-4-02TTHM | 6.41 ppb |
| 2021-07-13 | 210713-4-03TTHM | 0.700 ppb |
| 2021-07-13 | 210713-4-04TTHM | 1.69 ppb |
| 2021-07-13 | 210713-4-05TTHM | 1.32 ppb |
| 2021-07-13 | 210713-4-06TTHM | 1.09 ppb |
| 2021-07-13 | 210713-4-07TTHM | 1.43 ppb |
| 2021-07-14 | 210714-1-06 TTHM | ND |
| 2021-07-14 | 210714-3-04 VOC | 0.850 ppb |
| 2021-07-14 | 210714-3-05 VOC | 0.770 ppb |
| 2021-07-14 | 210714-3-06 VOC | ND |
| 2021-10-05 | 211005-4-01TTHM | 0.600 ppb |
| 2021-10-05 | 211005-4-02TTHM | 1.09 ppb |
| 2021-10-05 | 211005-4-03TTHM | 0.990 ppb |
| 2021-10-06 | 211006-4-01TTHM | 1.37 ppb |
| 2021-10-06 | 211006-4-02TTHM | 6.39 ppb |
| 2021-10-06 | 211006-4-03TTHM | 0.940 ppb |
| 2021-10-06 | 211006-4-04TTHM | 1.72 ppb |
| 2021-10-07 | 211007-4-01TTHM | 1.56 ppb |
| 2021-10-12 | 211012-3-04 VOC | 0.700 ppb |
| 2021-10-12 | 211012-3-05 VOC | 0.640 ppb |
| 2021-10-13 | 211013-3-06 VOC | ND |
| 2022-01-04 | 220104-3-04 VOC | 0.680 ppb |
| 2022-01-05 | 220105-3-05 VOC | 0.730 ppb |
| 2022-01-05 | 220105-3-06 VOC | ND |
| 2022-01-10 | 220110-4-01TTHM | ND |
| 2022-01-10 | 220110-4-02TTHM | 0.940 ppb |
| 2022-01-11 | 220111-4-01TTHM | 1.44 ppb |
| 2022-01-11 | 220111-4-02TTHM | 1.08 ppb |
| 2022-01-11 | 220111-4-03TTHM | 1.16 ppb |
| 2022-01-11 | 220111-4-04TTHM | 1.20 ppb |
| 2022-01-11 | 220111-4-05TTHM | 1.88 ppb |
| 2022-01-11 | 220111-4-06TTHM | 3.86 ppb |
| 2022-04-05 | 220405-2-02 TTHM | 0.930 ppb |
| 2022-04-05 | 220405-4-01TTHM | 1.62 ppb |
| 2022-04-05 | 220405-4-02TTHM | 1.85 ppb |
| 2022-04-05 | 220405-4-03TTHM | 1.37 ppb |
| 2022-04-05 | 220405-4-04TTHM | 1.76 ppb |
| 2022-04-05 | 220405-4-05TTHM | 4.39 ppb |
| 2022-04-05 | 220405-4-06TTHM | 1.48 ppb |
| 2022-04-05 | 220405-4-07TTHM | 0.630 ppb |
| 2022-04-13 | 220413-3-04 VOC | 0.710 ppb |
| 2022-04-13 | 220413-3-05 VOC | 0.680 ppb |
| 2022-04-13 | 220413-3-06 VOC | ND |
| 2022-07-06 | 220706-3-05VOC | 0.670 ppb |
| 2022-07-06 | 220706-4-01VOC | ND |
| 2022-07-12 | 220712-5-01TTHM | 1.89 ppb |
| 2022-07-12 | 220712-5-02TTHM | 6.75 ppb |
| 2022-07-12 | 220712-5-03TTHM | 1.69 ppb |
| 2022-07-12 | 220712-5-04TTHM | 2.32 ppb |
| 2022-07-12 | 220712-5-05TTHM | 2.28 ppb |
| 2022-07-12 | 220712-5-06TTHM | 1.39 ppb |
| 2022-07-12 | 220712-5-07TTHM | 2.37 ppb |
| 2022-07-12 | 220712-5-08TTHM | 0.870 ppb |
| 2022-07-18 | 220718-3-01VOC | ND |
| 2022-07-18 | 220718-3-02 VOC | ND |
| 2022-07-19 | 220719-1-06 VOC | 1.01 ppb |
| 2022-07-19 | 220719-3-03 VOC | ND |
| 2022-07-19 | 220719-3-04 VOC | 0.980 ppb |
| 2022-10-04 | 221004-4-01TTHM | 1.87 ppb |
| 2022-10-04 | 221004-4-02TTHM | 3.18 ppb |
| 2022-10-04 | 221004-4-03TTHM | 5.69 ppb |
| 2022-10-04 | 221004-4-04TTHM | 1.79 ppb |
| 2022-10-04 | 221004-4-05TTHM | 2.63 ppb |
| 2022-10-04 | 221004-4-06TTHM | 2.52 ppb |
| 2022-10-04 | 221004-4-07TTHM | 1.15 ppb |
| 2022-10-05 | 221005-5-01TTHM | 0.960 ppb |
| 2022-10-11 | 221011-3-04 VOC | 0.630 ppb |
| 2022-10-12 | 221012-3-05 VOC | 0.510 ppb |
| 2022-10-12 | 221012-3-06 VOC | ND |
| 2023-01-09 | 230109-5-01TTHM | 3.28 ppb |
| 2023-01-09 | 230109-5-02TTHM | 2.25 ppb |
| 2023-01-10 | 230110-5-01TTHM | 1.23 ppb |
| 2023-01-10 | 230110-5-02TTHM | 2.39 ppb |
| 2023-01-10 | 230110-5-03TTHM | 4.79 ppb |
| 2023-01-10 | 230110-5-04TTHM | 2.48 ppb |
| 2023-01-10 | 230110-5-05TTHM | 2.68 ppb |
| 2023-01-12 | 230112-4-01TTHM | 1.11 ppb |
| 2023-01-17 | 230117-3-03 VOC | ND |
| 2023-01-17 | 230117-3-04 VOC | 0.740 ppb |
| 2023-01-19 | 230119-3-06 VOC | ND |
| 2023-01-31 | 230131-3-07VOC | 0.600 ppb |
| 2023-04-03 | 230403-3-05VOC | 0.640 ppb |
| 2023-04-04 | 230404-3-06VOC | ND |
| 2023-04-05 | 230405-3-04VOC | 0.650 ppb |
| 2023-04-11 | 230411-8-01TTHM | 0.710 ppb |
| 2023-04-11 | 230413-4-01TTHM | 0.810 ppb |
| 2023-04-11 | 230413-4-02TTHM | 1.04 ppb |
| 2023-04-12 | 230414-3-01TTHM | 1.36 ppb |
| 2023-04-12 | 230414-3-02TTHM | ND |
| 2023-04-12 | 230414-3-03TTHM | 4.56 ppb |
| 2023-04-12 | 230414-3-04TTHM | 1.18 ppb |
| 2023-04-13 | 230413-4-03TTHM | 0.510 ppb |
| 2023-07-10 | 230710-5-01TTHM | 1.36 ppb |
| 2023-07-10 | 230710-5-02TTHM | 0.610 ppb |
| 2023-07-11 | 230711-4-01TTHM | 2.21 ppb |
| 2023-07-11 | 230711-4-02TTHM | 0.990 ppb |
| 2023-07-11 | 230711-4-03TTHM | 2.04 ppb |
| 2023-07-11 | 230711-4-04TTHM | 5.68 ppb |
| 2023-07-11 | 230711-4-05TTHM | 1.83 ppb |
| 2023-07-11 | 230711-4-06TTHM | 1.01 ppb |
| 2023-07-17 | 230717-3-01VOC | ND |
| 2023-07-17 | 230717-3-02 VOC | ND |
| 2023-07-17 | 230717-3-03 VOC | ND |
| 2023-07-17 | 230717-3-04 VOC | 0.840 ppb |
| 2023-07-17 | 230717-3-05 VOC | 0.730 ppb |
| 2023-07-19 | 230719-3-06 VOC | ND |
| 2023-09-07 | 230907-1-06VOC | 0.680 ppb |
| 2023-10-02 | 231002-3-04VOC | 0.710 ppb |
| 2023-10-02 | 231002-3-05VOC | 0.720 ppb |
| 2023-10-04 | 231004-3-06VOC | ND |
| 2023-10-10 | 231010-5-01TTHM | 1.46 ppb |
| 2023-10-10 | 231010-5-02TTHM | 1.11 ppb |
| 2023-10-10 | 231010-5-03TTHM | 1.30 ppb |
| 2023-10-10 | 231010-5-04TTHM | 0.920 ppb |
| 2023-10-11 | 231011-4-01TTHM | ND |
| 2023-10-11 | 231011-4-02TTHM | 1.34 ppb |
| 2023-10-11 | 231011-4-03TTHM | 5.41 ppb |
| 2023-10-11 | 231011-4-04TTHM | ND |