Bromoform
West Plains
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.326 ppb | 17 | 9 | ND - 0.760 ppb |
| 2015 | 0.586 ppb | 17 | 15 | ND - 0.800 ppb |
| 2016 | 0.639 ppb | 17 | 13 | ND - 1.48 ppb |
| 2017 | 0.506 ppb | 7 | 5 | ND - 0.820 ppb |
| 2018 | 0.628 ppb | 9 | 9 | 0.510 ppb - 0.750 ppb |
| 2019 | 0.344 ppb | 9 | 4 | ND - 1.24 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 |
|---|---|---|
| 2014-02-10 | AC18194 | ND |
| 2014-02-10 | AC18193 | ND |
| 2014-02-10 | AC18196 | ND |
| 2014-02-10 | AC18195 | ND |
| 2014-05-12 | AC23201 | ND |
| 2014-05-12 | AC23202 | 0.540 ppb |
| 2014-05-12 | AC23203 | 0.530 ppb |
| 2014-05-12 | AC23204 | ND |
| 2014-05-20 | AC23950 | ND |
| 2014-08-26 | AC33308 | ND |
| 2014-08-26 | AC33309 | 0.640 ppb |
| 2014-08-26 | AC33310 | 0.670 ppb |
| 2014-08-26 | AC33311 | 0.540 ppb |
| 2014-11-17 | AC38247 | 0.640 ppb |
| 2014-11-17 | AC38250 | 0.760 ppb |
| 2014-11-17 | AC38249 | 0.610 ppb |
| 2014-11-17 | AC38248 | 0.620 ppb |
| 2015-02-18 | AC41974 | 0.600 ppb |
| 2015-02-18 | AC41975 | 0.580 ppb |
| 2015-02-18 | AC41976 | ND |
| 2015-02-18 | AC41977 | ND |
| 2015-05-06 | AC46544 | 0.540 ppb |
| 2015-05-06 | AC46543 | 0.580 ppb |
| 2015-05-06 | AC46545 | 0.700 ppb |
| 2015-05-06 | AC46542 | 0.540 ppb |
| 2015-05-13 | AC50752 | 0.670 ppb |
| 2015-08-12 | AC57421 | 0.660 ppb |
| 2015-08-12 | AC57422 | 0.770 ppb |
| 2015-08-12 | AC57423 | 0.650 ppb |
| 2015-08-12 | AC57424 | 0.560 ppb |
| 2015-11-09 | AC62808 | 0.800 ppb |
| 2015-11-09 | AC62809 | 0.770 ppb |
| 2015-11-09 | AC62810 | 0.800 ppb |
| 2015-11-09 | AC62811 | 0.740 ppb |
| 2016-02-16 | AC66355 | 0.570 ppb |
| 2016-02-16 | AC66353 | 0.620 ppb |
| 2016-02-16 | AC66352 | 0.590 ppb |
| 2016-02-16 | AC66354 | 0.640 ppb |
| 2016-05-09 | AC72048 | ND |
| 2016-05-09 | AC72046 | 0.960 ppb |
| 2016-05-09 | AC72047 | ND |
| 2016-05-09 | AC72045 | ND |
| 2016-05-17 | AC72780 | ND |
| 2016-08-15 | AC81641 | 1.10 ppb |
| 2016-08-15 | AC81639 | 1.09 ppb |
| 2016-08-15 | AC81642 | 0.770 ppb |
| 2016-08-15 | AC81640 | 1.48 ppb |
| 2016-11-14 | AC86947 | 0.650 ppb |
| 2016-11-14 | AC86944 | 0.800 ppb |
| 2016-11-14 | AC86946 | 0.820 ppb |
| 2016-11-21 | AC86945 | 0.770 ppb |
| 2017-05-03 | AC95777 | ND |
| 2017-05-03 | AC95778 | ND |
| 2017-06-05 | AC96512 | 0.600 ppb |
| 2017-08-08 | AD03423 | 0.820 ppb |
| 2017-08-08 | AD03422 | 0.610 ppb |
| 2017-11-13 | AD09492 | 0.760 ppb |
| 2017-11-13 | AD09491 | 0.750 ppb |
| 2018-02-13 | AD14277 | 0.630 ppb |
| 2018-02-13 | AD14278 | 0.660 ppb |
| 2018-05-09 | AD20510 | 0.600 ppb |
| 2018-05-09 | AD20511 | 0.660 ppb |
| 2018-05-31 | AD20692 | 0.690 ppb |
| 2018-08-07 | AD31217 | 0.750 ppb |
| 2018-08-07 | AD31216 | 0.560 ppb |
| 2018-11-05 | AD35720 | 0.510 ppb |
| 2018-11-05 | AD35721 | 0.590 ppb |
| 2019-02-11 | AD39388 | ND |
| 2019-02-11 | AD39389 | ND |
| 2019-05-08 | AD47469 | ND |
| 2019-05-08 | AD47470 | 1.24 ppb |
| 2019-05-15 | AD47654 | ND |
| 2019-08-13 | AD53944 | ND |
| 2019-08-13 | AD53945 | 0.630 ppb |
| 2019-11-05 | AD58095 | 0.620 ppb |
| 2019-11-05 | AD58096 | 0.610 ppb |