Bromoform
Zanesville PWS
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 | 1.04 ppb | 16 | 16 | 0.620 ppb - 1.70 ppb |
| 2015 | 1.30 ppb | 16 | 16 | 0.620 ppb - 3.10 ppb |
| 2016 | 1.15 ppb | 12 | 12 | 0.610 ppb - 2.51 ppb |
| 2017 | 1.39 ppb | 2 | 2 | 1.13 ppb - 1.64 ppb |
| 2018 | 1.47 ppb | 16 | 16 | 0.700 ppb - 2.60 ppb |
| 2019 | 0.908 ppb | 12 | 12 | 0.600 ppb - 1.20 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 |
|---|---|---|
| 2014-02-04 | A140176519 | 0.760 ppb |
| 2014-02-04 | A140176518 | 0.620 ppb |
| 2014-02-04 | A140176517 | 0.620 ppb |
| 2014-02-04 | A140176516 | 0.780 ppb |
| 2014-05-06 | A140191241 | 0.730 ppb |
| 2014-05-06 | A140191240 | 0.820 ppb |
| 2014-05-06 | A140191239 | 1.20 ppb |
| 2014-05-06 | A140191238 | 0.920 ppb |
| 2014-08-05 | A140213902 | 0.890 ppb |
| 2014-08-05 | A140213901 | 1.30 ppb |
| 2014-08-05 | A140213904 | 1.20 ppb |
| 2014-08-05 | A140213903 | 1.10 ppb |
| 2014-11-04 | A140217461 | 1.20 ppb |
| 2014-11-04 | A140217462 | 1.70 ppb |
| 2014-11-04 | A140217463 | 1.40 ppb |
| 2014-11-04 | A140217460 | 1.40 ppb |
| 2015-02-03 | A150231741 | 0.960 ppb |
| 2015-02-03 | A150231738 | 1.10 ppb |
| 2015-02-03 | A150231739 | 1.10 ppb |
| 2015-02-03 | A150231740 | 1.40 ppb |
| 2015-05-05 | A150232391 | 0.640 ppb |
| 2015-05-05 | A150232390 | 0.840 ppb |
| 2015-05-05 | A150232389 | 0.760 ppb |
| 2015-05-05 | A150232388 | 0.780 ppb |
| 2015-08-04 | A150310836 | 0.730 ppb |
| 2015-08-04 | A150310835 | 0.620 ppb |
| 2015-08-04 | A150310834 | 0.660 ppb |
| 2015-08-04 | A150310833 | 0.650 ppb |
| 2015-11-04 | A150331690 | 2.32 ppb |
| 2015-11-04 | A150331689 | 2.51 ppb |
| 2015-11-04 | A150331688 | 3.10 ppb |
| 2015-11-04 | A150331687 | 2.56 ppb |
| 2016-02-02 | A160338053 | 0.980 ppb |
| 2016-02-02 | A160338054 | 0.920 ppb |
| 2016-02-02 | A160338051 | 0.840 ppb |
| 2016-02-02 | A160338052 | 1.21 ppb |
| 2016-02-16 | A160338581 | 1.14 ppb |
| 2016-02-16 | A160338580 | 1.33 ppb |
| 2016-05-03 | A160374944 | 0.820 ppb |
| 2016-05-03 | A160374945 | 0.610 ppb |
| 2016-05-03 | A160374946 | 0.770 ppb |
| 2016-05-03 | A160374947 | 0.690 ppb |
| 2016-08-02 | A160399512 | 2.51 ppb |
| 2016-08-02 | A160399513 | 2.02 ppb |
| 2017-08-23 | A170399516 | 1.13 ppb |
| 2017-08-23 | A170399517 | 1.64 ppb |
| 2018-02-05 | A180548565 | 1.30 ppb |
| 2018-02-05 | A180548562 | 1.60 ppb |
| 2018-02-05 | A180548563 | 2.60 ppb |
| 2018-02-05 | A180548564 | 1.40 ppb |
| 2018-05-01 | A180593201 | 0.700 ppb |
| 2018-05-01 | A180593203 | 0.800 ppb |
| 2018-05-01 | A180593200 | 0.900 ppb |
| 2018-05-02 | A180593202 | 0.800 ppb |
| 2018-08-06 | A180614381 | 1.90 ppb |
| 2018-08-06 | A180614382 | 1.30 ppb |
| 2018-08-06 | A180614383 | 1.80 ppb |
| 2018-08-06 | A180614384 | 2.10 ppb |
| 2018-11-06 | 8K00829-03 | 1.50 ppb |
| 2018-11-06 | 8K00829-02 | 1.50 ppb |
| 2018-11-06 | 8K00829-01 | 1.80 ppb |
| 2018-11-06 | 8K00829-04 | 1.50 ppb |
| 2019-02-04 | 9B00455-02 | 0.800 ppb |
| 2019-02-04 | 9B00455-04 | 0.700 ppb |
| 2019-02-04 | 9B00455-03 | 0.900 ppb |
| 2019-02-04 | 9B00455-01 | 0.600 ppb |
| 2019-05-01 | 9E00029-01 | 1.20 ppb |
| 2019-05-01 | 9E00029-02 | 1.10 ppb |
| 2019-05-01 | 9E00029-03 | 1.10 ppb |
| 2019-05-01 | 9E00029-04 | 1.000 ppb |
| 2019-08-06 | 9H00927-01 | 1.000 ppb |
| 2019-08-06 | 9H00927-02 | 0.700 ppb |
| 2019-08-06 | 9H00927-03 | 0.700 ppb |
| 2019-08-06 | 9H00927-04 | 1.10 ppb |