Bromoform
Allendale Water Department
Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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 |
|---|---|---|---|---|
| 2014 | 0.602 ppb | 13 | 6 | ND - 2.61 ppb |
| 2015 | 0.839 ppb | 14 | 9 | ND - 2.80 ppb |
| 2016 | 0.362 ppb | 13 | 5 | ND - 1.50 ppb |
| 2017 | 0.558 ppb | 11 | 9 | ND - 0.894 ppb |
| 2018 | 0.593 ppb | 11 | 8 | ND - 1.20 ppb |
| 2019 | 0.497 ppb | 10 | 9 | ND - 1.41 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.5 ppb
The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-21 | 4010523-01 | ND |
| 2014-03-05 | 4030178-01 | 1.81 ppb |
| 2014-03-05 | 4030178-02 | 1.51 ppb |
| 2014-04-23 | 4040797-01 | 2.61 ppb |
| 2014-06-03 | 4060137-01 | ND |
| 2014-06-03 | 4060137-02 | ND |
| 2014-07-14 | 4070507-01 | 1.20 ppb |
| 2014-09-02 | 4090067-01 | 0.330 ppb |
| 2014-09-02 | 4090067-02 | 0.360 ppb |
| 2014-10-02 | 4100134-02 | ND |
| 2014-10-02 | 4100134-01 | ND |
| 2014-12-02 | 4120104-01 | ND |
| 2014-12-02 | 4120104-02 | ND |
| 2015-01-22 | 2051451001 | 2.80 ppb |
| 2015-03-10 | 2058940002 | 1.50 ppb |
| 2015-03-10 | 2058940001 | 1.80 ppb |
| 2015-04-06 | 2063967001 | 0.980 ppb |
| 2015-06-08 | 2076066002 | 0.630 ppb |
| 2015-06-08 | 2076066001 | 1.50 ppb |
| 2015-07-07 | 2081643001 | ND |
| 2015-09-03 | 2093978002 | 0.790 ppb |
| 2015-09-03 | 2093978001 | 1.10 ppb |
| 2015-10-20 | 2103273001 | ND |
| 2015-10-20 | 2103273003 | ND |
| 2015-10-20 | 2103273002 | 0.640 ppb |
| 2015-12-08 | 5120284-02 | ND |
| 2015-12-08 | 5120284-01 | ND |
| 2016-01-05 | 2116959001 | ND |
| 2016-03-03 | 6030126-02 | 0.707 ppb |
| 2016-03-03 | 6030126-01 | 0.821 ppb |
| 2016-04-04 | 2134713001 | 1.50 ppb |
| 2016-06-07 | 2149670002 | ND |
| 2016-06-07 | 2149670001 | ND |
| 2016-07-18 | 2159873001 | 0.680 ppb |
| 2016-09-13 | 2174824002 | ND |
| 2016-09-13 | 2174824001 | ND |
| 2016-10-06 | 2180788001 | 1.000 ppb |
| 2016-10-06 | 2180788002 | ND |
| 2016-12-05 | 2194065001 | ND |
| 2016-12-05 | 2194065002 | ND |
| 2017-01-26 | 7010678-01 | 0.593 ppb |
| 2017-03-06 | 7030234-01 | 0.894 ppb |
| 2017-03-06 | 7030234-02 | 0.866 ppb |
| 2017-06-06 | 7060260-01 | 0.267 ppb |
| 2017-06-06 | 7060260-02 | ND |
| 2017-08-15 | 7080616-01 | 0.888 ppb |
| 2017-09-06 | 7090230-02 | 0.563 ppb |
| 2017-09-06 | 7090230-01 | 0.871 ppb |
| 2017-10-17 | 7100558-01 | 0.701 ppb |
| 2017-12-05 | 7120184-02 | ND |
| 2017-12-05 | 7120184-01 | 0.499 ppb |
| 2018-01-22 | 8010676-01 | 1.01 ppb |
| 2018-03-06 | 8030250-02 | 0.739 ppb |
| 2018-03-06 | 8030250-01 | 0.839 ppb |
| 2018-06-05 | 8060257-02 | 0.816 ppb |
| 2018-06-05 | 8060257-01 | 0.764 ppb |
| 2018-07-16 | 8070628-01 | 0.861 ppb |
| 2018-09-04 | 8090144-02 | ND |
| 2018-09-04 | 8090144-01 | ND |
| 2018-10-15 | 8100803-02 | 1.20 ppb |
| 2018-12-03 | 8120185-01 | 0.290 ppb |
| 2018-12-03 | 8120185-02 | ND |
| 2019-01-22 | 9010845-01 | 0.449 ppb |
| 2019-03-05 | 9030253-02 | 0.682 ppb |
| 2019-03-05 | 9030253-01 | 0.591 ppb |
| 2019-04-04 | 9040340-01 | 1.41 ppb |
| 2019-06-05 | 9060294-02 | 0.347 ppb |
| 2019-06-05 | 9060294-01 | ND |
| 2019-09-05 | 9090285-02 | 0.259 ppb |
| 2019-09-05 | 9090285-01 | 0.325 ppb |
| 2019-12-03 | 9120168-01 | 0.451 ppb |
| 2019-12-03 | 9120168-02 | 0.453 ppb |