Bromoform
Shawnee Valley Public Water District
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 | ND | 2 | 0 | ND |
| 2015 | 0.698 ppb | 4 | 3 | ND - 1.49 ppb |
| 2016 | 0.755 ppb | 8 | 8 | 0.583 ppb - 0.938 ppb |
| 2017 | 0.951 ppb | 8 | 6 | ND - 2.32 ppb |
| 2018 | 0.243 ppb | 8 | 2 | ND - 0.987 ppb |
| 2019 | 0.304 ppb | 8 | 2 | ND - 1.22 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 |
|---|---|---|
| 2014-08-12 | 4082468-02 | ND |
| 2014-08-12 | 4082468-01 | ND |
| 2015-08-10 | 5081848-01 | ND |
| 2015-08-10 | 5081848-02 | 1.49 ppb |
| 2015-11-11 | 5112109-01 | 0.648 ppb |
| 2015-11-11 | 5112109-02 | 0.654 ppb |
| 2016-02-22 | 6023445-01 | 0.583 ppb |
| 2016-02-22 | 6023445-02 | 0.699 ppb |
| 2016-05-18 | 6053269-01 | 0.817 ppb |
| 2016-05-18 | 6053269-02 | 0.664 ppb |
| 2016-08-14 | 6082896-02 | 0.938 ppb |
| 2016-08-14 | 6082896-01 | 0.753 ppb |
| 2016-11-09 | 6112058-02 | 0.803 ppb |
| 2016-11-09 | 6112058-01 | 0.786 ppb |
| 2017-02-06 | 7021364-01 | ND |
| 2017-02-06 | 7021364-02 | 1.23 ppb |
| 2017-05-03 | 7051098-02 | 0.540 ppb |
| 2017-05-03 | 7051098-01 | 0.577 ppb |
| 2017-08-14 | 7083125-01 | 2.31 ppb |
| 2017-08-14 | 7083125-02 | 2.32 ppb |
| 2017-11-13 | 7112747-02 | ND |
| 2017-11-13 | 7112747-01 | 0.630 ppb |
| 2018-02-14 | 8022744-02 | ND |
| 2018-02-14 | 8022744-01 | ND |
| 2018-05-23 | 8054692-01 | ND |
| 2018-05-23 | 8054692-02 | ND |
| 2018-08-21 | 8084671-01 | ND |
| 2018-08-21 | 8084671-02 | ND |
| 2018-11-19 | 8113862-01 | 0.960 ppb |
| 2018-11-19 | 8113862-02 | 0.987 ppb |
| 2019-02-24 | 9024108-01 | ND |
| 2019-02-24 | 9024108-02 | ND |
| 2019-05-20 | 9054496-01 | ND |
| 2019-05-20 | 9054496-02 | ND |
| 2019-08-14 | 9083623-01 | 1.22 ppb |
| 2019-08-14 | 9083623-02 | 1.21 ppb |
| 2019-11-15 | 9112781-02 | ND |
| 2019-11-15 | 9112781-01 | ND |