Bromodichloromethane
Manchester Water Department
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.
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 | 4.03 ppb | 49 | 34 | ND - 11.0 ppb |
| 2019 | 3.88 ppb | 48 | 33 | ND - 13.5 ppb |
| 2020 | 4.57 ppb | 48 | 33 | ND - 19.5 ppb |
| 2021 | 3.73 ppb | 48 | 32 | ND - 9.45 ppb |
| 2022 | 4.43 ppb | 48 | 33 | ND - 12.8 ppb |
| 2023 | 3.83 ppb | 49 | 31 | ND - 13.4 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 | Lab ID | Result |
|---|---|---|
| 2018-01-08 | AA82357-DBP1 | 7.60 ppb |
| 2018-01-08 | AA82358-DBP1 | 4.80 ppb |
| 2018-01-08 | AA82359-DBP1 | 2.20 ppb |
| 2018-01-08 | AA82323-VOC1 | 2.40 ppb |
| 2018-01-08 | AA82328-VOC1 | ND |
| 2018-01-08 | AA82329-VOC1 | ND |
| 2018-01-09 | AA82343-DBP1 | 3.30 ppb |
| 2018-01-09 | AA82355-DBP1 | 5.70 ppb |
| 2018-01-09 | AA82356-DBP1 | 5.20 ppb |
| 2018-01-09 | AA82360-DBP1 | 4.80 ppb |
| 2018-01-09 | AA82347-VOC1 | ND |
| 2018-01-09 | AA82348-VOC1 | ND |
| 2018-01-09 | AA82350-VOC1 | ND |
| 2018-01-10 | AA82378-DBP1 | 6.60 ppb |
| 2018-01-10 | AA82372-VOC1 | 0.600 ppb |
| 2018-01-10 | AA82373-VOC1 | ND |
| 2018-04-10 | AA83453-VOC1 | ND |
| 2018-04-10 | AA83456-VOC1 | ND |
| 2018-04-11 | AA83470-VOC1 | ND |
| 2018-04-16 | AA83526-DBP1 | 6.10 ppb |
| 2018-04-16 | AA83527-DBP1 | 1.30 ppb |
| 2018-04-17 | AA83543-DBP1 | 5.10 ppb |
| 2018-04-17 | AA83544-DBP1 | 2.90 ppb |
| 2018-04-17 | AA83545-DBP1 | 5.40 ppb |
| 2018-04-17 | AA83546-DBP1 | 3.50 ppb |
| 2018-04-17 | AA83547-DBP1 | 4.20 ppb |
| 2018-04-17 | AA83548-DBP1 | 5.30 ppb |
| 2018-07-16 | AA84694-DBP1 | 3.30 ppb |
| 2018-07-16 | AA84706-DBP1 | 10.00 ppb |
| 2018-07-17 | AA84723-DBP1 | 8.40 ppb |
| 2018-07-17 | AA84724-DBP1 | 10.00 ppb |
| 2018-07-17 | AA84725-DBP1 | 8.30 ppb |
| 2018-07-17 | AA84726-DBP1 | 6.00 ppb |
| 2018-07-17 | AA84727-DBP1 | 11.0 ppb |
| 2018-07-17 | AA84729-DBP1 | 8.70 ppb |
| 2018-07-17 | AA84728-VOC1 | ND |
| 2018-07-18 | AA84742-VOC1 | ND |
| 2018-07-18 | AA84743-VOC1 | ND |
| 2018-10-15 | AA85924-DBP1 | 5.90 ppb |
| 2018-10-15 | AA85872-DBP1 | 8.60 ppb |
| 2018-10-15 | AA85873-DBP1 | 7.00 ppb |
| 2018-10-15 | AA85874-DBP1 | 9.40 ppb |
| 2018-10-16 | AA85882-DBP1 | 3.30 ppb |
| 2018-10-16 | AA85893-DBP1 | 8.40 ppb |
| 2018-10-16 | AA85880-DBP1 | 3.70 ppb |
| 2018-10-16 | AA85887-VOC1 | ND |
| 2018-10-17 | AA85906-VOC1 | ND |
| 2018-10-17 | AA85907-VOC1 | ND |
| 2018-10-18 | AA85923-DBP1 | 8.40 ppb |
| 2019-01-14 | AA86944-DBP1 | 4.30 ppb |
| 2019-01-14 | AA86945-DBP1 | 1.80 ppb |
| 2019-01-15 | AA86953-DBP1 | 2.60 ppb |
| 2019-01-15 | AA86960-DBP1 | 2.70 ppb |
| 2019-01-15 | AA86961-DBP1 | 4.00 ppb |
| 2019-01-15 | AA86962-DBP1 | 4.60 ppb |
| 2019-01-15 | AA86956-VOC1 | ND |
| 2019-01-15 | AA86957-VOC1 | ND |
| 2019-01-16 | AA86968-DBP1 | 0.990 ppb |
| 2019-01-16 | AA86978-DBP1 | 4.00 ppb |
| 2019-01-16 | AA86968-VOC1 | 0.920 ppb |
| 2019-01-16 | AA86974-VOC1 | ND |
| 2019-01-16 | AA86975-VOC1 | ND |
| 2019-01-17 | AA86989-VOC1 | ND |
| 2019-01-17 | AA86990-VOC1 | ND |
| 2019-04-15 | AA88012-DBP1 | 2.22 ppb |
| 2019-04-15 | AA88021-DBP1 | 4.34 ppb |
| 2019-04-15 | AA88022-DBP1 | 5.39 ppb |
| 2019-04-15 | AA88023-DBP1 | 6.16 ppb |
| 2019-04-15 | AA88024-DBP1 | 7.12 ppb |
| 2019-04-15 | AA88025-DBP1 | 7.17 ppb |
| 2019-04-17 | AA88059-DBP1 | 6.58 ppb |
| 2019-04-17 | AA88060-DBP1 | 4.53 ppb |
| 2019-04-23 | AA88123-VOC1 | ND |
| 2019-04-24 | AA88139-VOC1 | ND |
| 2019-04-24 | AA88140-VOC1 | ND |
| 2019-07-08 | AA89073-VOC1 | ND |
| 2019-07-08 | AA89074-VOC1 | ND |
| 2019-07-10 | AA89110-VOC1 | ND |
| 2019-07-15 | AA89173-DBP1 | 4.77 ppb |
| 2019-07-15 | AA89174-DBP1 | 7.02 ppb |
| 2019-07-15 | AA89175-DBP1 | 6.57 ppb |
| 2019-07-15 | AA89176-DBP1 | 7.96 ppb |
| 2019-07-15 | AA89177-DBP1 | 5.84 ppb |
| 2019-07-16 | AA89183-DBP1 | 3.00 ppb |
| 2019-07-16 | AA89193-DBP1 | 1.37 ppb |
| 2019-07-16 | AA89194-DBP1 | 7.17 ppb |
| 2019-10-08 | AA90268-VOC1 | ND |
| 2019-10-09 | AA90285-VOC1 | ND |
| 2019-10-09 | AA90287-VOC1 | ND |
| 2019-10-15 | AA90342-DBP1 | 4.49 ppb |
| 2019-10-15 | AA90344-DBP1 | 9.52 ppb |
| 2019-10-15 | AA90353-DBP1 | 12.3 ppb |
| 2019-10-15 | AA90354-DBP1 | 13.5 ppb |
| 2019-10-15 | AA90355-DBP1 | 8.43 ppb |
| 2019-10-15 | AA90356-DBP1 | 7.65 ppb |
| 2019-10-15 | AA90357-DBP1 | 6.85 ppb |
| 2019-10-15 | AA90358-DBP1 | 10.4 ppb |
| 2020-01-13 | AA91414-DBP1 | 5.28 ppb |
| 2020-01-13 | AA91415-DBP1 | 6.71 ppb |
| 2020-01-13 | AA91416-DBP1 | 2.93 ppb |
| 2020-01-14 | AA91431-DBP1 | 4.06 ppb |
| 2020-01-14 | AA91436-DBP1 | 6.29 ppb |
| 2020-01-14 | AA91437-DBP1 | 5.75 ppb |
| 2020-01-15 | AA91452-DBP1 | 2.62 ppb |
| 2020-01-15 | AA91455-DBP1 | 3.71 ppb |
| 2020-01-21 | AA91524-VOC1 | ND |
| 2020-01-21 | AA91525-VOC1 | ND |
| 2020-01-21 | AA91522-VOC1 | ND |
| 2020-01-21 | AA91523-VOC1 | ND |
| 2020-01-21 | AA91526-VOC1 | ND |
| 2020-01-22 | AA91540-VOC1 | ND |
| 2020-01-23 | AA91552-VOC1 | 1.66 ppb |
| 2020-04-14 | AA92514-DBP1 | 4.43 ppb |
| 2020-04-14 | AA92515-DBP1 | 2.42 ppb |
| 2020-04-14 | AA92517-DBP1 | 19.5 ppb |
| 2020-04-14 | AA92529-DBP1 | 6.38 ppb |
| 2020-04-14 | AA92530-DBP1 | 4.99 ppb |
| 2020-04-14 | AA92531-DBP1 | 8.17 ppb |
| 2020-04-14 | AA92532-DBP1 | 5.71 ppb |
| 2020-04-14 | AA92522-VOC1 | ND |
| 2020-04-14 | AA92524-VOC1 | ND |
| 2020-04-15 | AA92551-DBP1 | 4.70 ppb |
| 2020-04-15 | AA92546-VOC1 | ND |
| 2020-07-07 | AA93640-VOC1 | ND |
| 2020-07-07 | AA93643-VOC1 | ND |
| 2020-07-07 | AA93644-VOC1 | ND |
| 2020-07-14 | AA93734-DBP1 | 1.19 ppb |
| 2020-07-14 | AA93738-DBP1 | 5.50 ppb |
| 2020-07-14 | AA93739-DBP1 | 6.96 ppb |
| 2020-07-14 | AA93740-DBP1 | 8.40 ppb |
| 2020-07-14 | AA93741-DBP1 | 6.28 ppb |
| 2020-07-14 | AA93742-DBP1 | 4.26 ppb |
| 2020-07-15 | AA93758-DBP1 | 3.54 ppb |
| 2020-07-15 | AA93771-DBP1 | 6.80 ppb |
| 2020-10-05 | AA95052-DBP1 | 6.07 ppb |
| 2020-10-05 | AA95050-DBP1 | 14.1 ppb |
| 2020-10-05 | AA95051-DBP1 | 11.8 ppb |
| 2020-10-05 | AA95053-DBP1 | 9.54 ppb |
| 2020-10-05 | AA95054-DBP1 | 12.7 ppb |
| 2020-10-06 | AA95060-DBP1 | 6.83 ppb |
| 2020-10-06 | AA95062-DBP1 | 9.93 ppb |
| 2020-10-07 | AA95096-DBP1 | 10.2 ppb |
| 2020-10-13 | AA95168-VOC1 | ND |
| 2020-10-14 | AA95186-VOC1 | ND |
| 2020-10-14 | AA95187-VOC1 | ND |
| 2021-01-12 | 210112-2-02 TTHM | 2.64 ppb |
| 2021-01-12 | 210112-5-01TTHM | 5.48 ppb |
| 2021-01-12 | 210112-5-02TTHM | 8.05 ppb |
| 2021-01-12 | 210112-3-04 VOC | ND |
| 2021-01-13 | 210113-2-02 TTHM | 5.29 ppb |
| 2021-01-13 | 210113-4-01TTHM | 4.89 ppb |
| 2021-01-13 | 210113-4-02TTHM | 5.85 ppb |
| 2021-01-14 | 210114-4-01TTHM | 5.28 ppb |
| 2021-01-14 | 210114-4-02TTHM | 2.60 ppb |
| 2021-01-20 | 210120-3-05 VOC | ND |
| 2021-01-20 | 210120-3-06 VOC | ND |
| 2021-04-05 | 210405-4-01TTHM | 7.02 ppb |
| 2021-04-05 | 210405-4-02TTHM | 5.07 ppb |
| 2021-04-06 | 210406-4-01TTHM | 6.87 ppb |
| 2021-04-06 | 210406-4-02TTHM | 4.39 ppb |
| 2021-04-06 | 210406-4-03TTHM | 5.48 ppb |
| 2021-04-06 | 210406-4-04TTHM | 2.83 ppb |
| 2021-04-07 | 210407-5-01TTHM | 2.40 ppb |
| 2021-04-09 | 210409-3-01TTHM | 5.44 ppb |
| 2021-04-12 | 210412-3-01VOC | ND |
| 2021-04-12 | 210412-3-02 VOC | ND |
| 2021-04-12 | 210412-3-04 VOC | ND |
| 2021-04-12 | 210412-3-05 VOC | ND |
| 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 | 4.75 ppb |
| 2021-07-13 | 210713-4-02TTHM | 8.97 ppb |
| 2021-07-13 | 210713-4-03TTHM | 5.27 ppb |
| 2021-07-13 | 210713-4-04TTHM | 5.49 ppb |
| 2021-07-13 | 210713-4-05TTHM | 4.40 ppb |
| 2021-07-13 | 210713-4-06TTHM | 2.89 ppb |
| 2021-07-13 | 210713-4-07TTHM | 9.45 ppb |
| 2021-07-14 | 210714-1-06 TTHM | 2.35 ppb |
| 2021-07-14 | 210714-3-04 VOC | ND |
| 2021-07-14 | 210714-3-05 VOC | ND |
| 2021-07-14 | 210714-3-06 VOC | ND |
| 2021-10-05 | 211005-4-01TTHM | 3.54 ppb |
| 2021-10-05 | 211005-4-02TTHM | 6.59 ppb |
| 2021-10-05 | 211005-4-03TTHM | 5.54 ppb |
| 2021-10-06 | 211006-4-01TTHM | 9.33 ppb |
| 2021-10-06 | 211006-4-02TTHM | 8.32 ppb |
| 2021-10-06 | 211006-4-03TTHM | 6.92 ppb |
| 2021-10-06 | 211006-4-04TTHM | 6.70 ppb |
| 2021-10-07 | 211007-4-01TTHM | 8.90 ppb |
| 2021-10-12 | 211012-3-04 VOC | ND |
| 2021-10-12 | 211012-3-05 VOC | ND |
| 2021-10-13 | 211013-3-06 VOC | ND |
| 2022-01-04 | 220104-3-04 VOC | ND |
| 2022-01-05 | 220105-3-05 VOC | ND |
| 2022-01-05 | 220105-3-06 VOC | ND |
| 2022-01-10 | 220110-4-01TTHM | 2.39 ppb |
| 2022-01-10 | 220110-4-02TTHM | 4.16 ppb |
| 2022-01-11 | 220111-4-01TTHM | 6.99 ppb |
| 2022-01-11 | 220111-4-02TTHM | 6.70 ppb |
| 2022-01-11 | 220111-4-03TTHM | 4.76 ppb |
| 2022-01-11 | 220111-4-04TTHM | 3.96 ppb |
| 2022-01-11 | 220111-4-05TTHM | 6.38 ppb |
| 2022-01-11 | 220111-4-06TTHM | 7.10 ppb |
| 2022-04-05 | 220405-2-02 TTHM | 1.74 ppb |
| 2022-04-05 | 220405-4-01TTHM | 4.32 ppb |
| 2022-04-05 | 220405-4-02TTHM | 7.72 ppb |
| 2022-04-05 | 220405-4-03TTHM | 5.47 ppb |
| 2022-04-05 | 220405-4-04TTHM | 4.42 ppb |
| 2022-04-05 | 220405-4-05TTHM | 6.66 ppb |
| 2022-04-05 | 220405-4-06TTHM | 5.30 ppb |
| 2022-04-05 | 220405-4-07TTHM | 2.31 ppb |
| 2022-04-13 | 220413-3-04 VOC | ND |
| 2022-04-13 | 220413-3-05 VOC | ND |
| 2022-04-13 | 220413-3-06 VOC | ND |
| 2022-07-06 | 220706-3-05VOC | ND |
| 2022-07-06 | 220706-4-01VOC | ND |
| 2022-07-12 | 220712-5-01TTHM | 9.01 ppb |
| 2022-07-12 | 220712-5-02TTHM | 11.7 ppb |
| 2022-07-12 | 220712-5-03TTHM | 7.45 ppb |
| 2022-07-12 | 220712-5-04TTHM | 9.66 ppb |
| 2022-07-12 | 220712-5-05TTHM | 9.92 ppb |
| 2022-07-12 | 220712-5-06TTHM | 3.11 ppb |
| 2022-07-12 | 220712-5-07TTHM | 11.2 ppb |
| 2022-07-12 | 220712-5-08TTHM | 4.10 ppb |
| 2022-07-18 | 220718-3-01VOC | ND |
| 2022-07-18 | 220718-3-02 VOC | ND |
| 2022-07-19 | 220719-1-06 VOC | 4.79 ppb |
| 2022-07-19 | 220719-3-03 VOC | ND |
| 2022-07-19 | 220719-3-04 VOC | ND |
| 2022-10-04 | 221004-4-01TTHM | 7.74 ppb |
| 2022-10-04 | 221004-4-02TTHM | 12.8 ppb |
| 2022-10-04 | 221004-4-03TTHM | 8.15 ppb |
| 2022-10-04 | 221004-4-04TTHM | 6.24 ppb |
| 2022-10-04 | 221004-4-05TTHM | 10.3 ppb |
| 2022-10-04 | 221004-4-06TTHM | 9.31 ppb |
| 2022-10-04 | 221004-4-07TTHM | 2.84 ppb |
| 2022-10-05 | 221005-5-01TTHM | 4.16 ppb |
| 2022-10-11 | 221011-3-04 VOC | ND |
| 2022-10-12 | 221012-3-05 VOC | ND |
| 2022-10-12 | 221012-3-06 VOC | ND |
| 2023-01-09 | 230109-5-01TTHM | 13.4 ppb |
| 2023-01-09 | 230109-5-02TTHM | 7.70 ppb |
| 2023-01-10 | 230110-5-01TTHM | 2.78 ppb |
| 2023-01-10 | 230110-5-02TTHM | 9.62 ppb |
| 2023-01-10 | 230110-5-03TTHM | 7.49 ppb |
| 2023-01-10 | 230110-5-04TTHM | 7.99 ppb |
| 2023-01-10 | 230110-5-05TTHM | 9.29 ppb |
| 2023-01-12 | 230112-4-01TTHM | 2.94 ppb |
| 2023-01-17 | 230117-3-03 VOC | ND |
| 2023-01-17 | 230117-3-04 VOC | ND |
| 2023-01-19 | 230119-3-06 VOC | ND |
| 2023-01-31 | 230131-3-07VOC | ND |
| 2023-04-03 | 230403-3-05VOC | ND |
| 2023-04-04 | 230404-3-06VOC | ND |
| 2023-04-05 | 230405-3-04VOC | ND |
| 2023-04-11 | 230411-8-01TTHM | 0.820 ppb |
| 2023-04-11 | 230413-4-01TTHM | 4.20 ppb |
| 2023-04-11 | 230413-4-02TTHM | 6.13 ppb |
| 2023-04-12 | 230414-3-01TTHM | 6.80 ppb |
| 2023-04-12 | 230414-3-02TTHM | ND |
| 2023-04-12 | 230414-3-03TTHM | 7.30 ppb |
| 2023-04-12 | 230414-3-04TTHM | 4.45 ppb |
| 2023-04-13 | 230413-4-03TTHM | 3.05 ppb |
| 2023-07-10 | 230710-5-01TTHM | 5.96 ppb |
| 2023-07-10 | 230710-5-02TTHM | 2.69 ppb |
| 2023-07-11 | 230711-4-01TTHM | 8.53 ppb |
| 2023-07-11 | 230711-4-02TTHM | 5.41 ppb |
| 2023-07-11 | 230711-4-03TTHM | 5.65 ppb |
| 2023-07-11 | 230711-4-04TTHM | 7.85 ppb |
| 2023-07-11 | 230711-4-05TTHM | 7.00 ppb |
| 2023-07-11 | 230711-4-06TTHM | 2.76 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 | ND |
| 2023-07-17 | 230717-3-05 VOC | ND |
| 2023-07-19 | 230719-3-06 VOC | ND |
| 2023-09-07 | 230907-1-06VOC | 4.35 ppb |
| 2023-10-02 | 231002-3-04VOC | ND |
| 2023-10-02 | 231002-3-05VOC | ND |
| 2023-10-04 | 231004-3-06VOC | ND |
| 2023-10-10 | 231010-5-01TTHM | 7.62 ppb |
| 2023-10-10 | 231010-5-02TTHM | 5.40 ppb |
| 2023-10-10 | 231010-5-03TTHM | 7.09 ppb |
| 2023-10-10 | 231010-5-04TTHM | 5.28 ppb |
| 2023-10-11 | 231011-4-01TTHM | ND |
| 2023-10-11 | 231011-4-02TTHM | 7.74 ppb |
| 2023-10-11 | 231011-4-03TTHM | 7.55 ppb |
| 2023-10-11 | 231011-4-04TTHM | 2.69 ppb |