Bromoform
St. Martin Parish Water Works District 3 - Cade
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 | 0.705 ppb | 12 | 12 | 0.490 ppb - 1.10 ppb |
| 2015 | 2.31 ppb | 16 | 16 | 0.440 ppb - 6.70 ppb |
| 2016 | 3.08 ppb | 4 | 4 | 0.650 ppb - 5.50 ppb |
| 2017 | 2.95 ppb | 4 | 2 | ND - 5.90 ppb |
| 2018 | ND | 4 | 0 | ND |
| 2019 | 0.440 ppb | 4 | 2 | ND - 0.880 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 |
|---|---|---|
| 2014-06-02 | 680-101971-6 | 0.570 ppb |
| 2014-06-02 | 680-101971-5 | 0.490 ppb |
| 2014-06-02 | 680-101971-6 | 0.570 ppb |
| 2014-06-02 | 680-101971-5 | 0.490 ppb |
| 2014-09-08 | 680-105115-1 | 0.550 ppb |
| 2014-09-08 | 680-105115-2 | 0.610 ppb |
| 2014-09-08 | 680-105115-2 | 0.610 ppb |
| 2014-09-08 | 680-105115-1 | 0.550 ppb |
| 2014-12-08 | 680-108171-1 | 0.910 ppb |
| 2014-12-08 | 680-108171-2 | 1.10 ppb |
| 2014-12-08 | 680-108171-2 | 1.10 ppb |
| 2014-12-08 | 680-108171-1 | 0.910 ppb |
| 2015-03-10 | 680-110526-7 | 0.470 ppb |
| 2015-03-10 | 680-110526-8 | 1.70 ppb |
| 2015-03-10 | 680-110526-7 | 0.470 ppb |
| 2015-03-10 | 680-110526-8 | 1.70 ppb |
| 2015-06-02 | 680-113226-1 | 0.580 ppb |
| 2015-06-02 | 680-113226-2 | 5.60 ppb |
| 2015-06-02 | 680-113226-1 | 0.580 ppb |
| 2015-06-02 | 680-113226-2 | 5.60 ppb |
| 2015-09-10 | 680-116673-5 | 0.440 ppb |
| 2015-09-10 | 680-116673-6 | 6.70 ppb |
| 2015-09-10 | 680-116673-6 | 6.70 ppb |
| 2015-09-10 | 680-116673-5 | 0.440 ppb |
| 2015-12-09 | 680-119947-2 | 2.20 ppb |
| 2015-12-09 | 680-119947-1 | 0.780 ppb |
| 2015-12-09 | 680-119947-2 | 2.20 ppb |
| 2015-12-09 | 680-119947-1 | 0.780 ppb |
| 2016-06-07 | 680-126221-10 | 5.50 ppb |
| 2016-06-07 | 680-126221-9 | 0.650 ppb |
| 2016-06-07 | 680-126221-10 | 5.50 ppb |
| 2016-06-07 | 680-126221-9 | 0.650 ppb |
| 2017-06-02 | 35315769026 | 5.90 ppb |
| 2017-06-02 | 35315769026 | 5.90 ppb |
| 2017-06-02 | 35315769025 | ND |
| 2017-06-02 | 35315769025 | ND |
| 2018-06-07 | 35397221002 | ND |
| 2018-06-07 | 35397221001 | ND |
| 2018-06-07 | 35397221001 | ND |
| 2018-06-07 | 35397221002 | ND |
| 2019-06-14 | 35475684001 | ND |
| 2019-06-14 | 35475684002 | 0.880 ppb |
| 2019-06-14 | 35475684001 | ND |
| 2019-06-14 | 35475684002 | 0.880 ppb |