Bromoform
Park Ridge 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.
188
Samples
0
Samples exceeding legal limit (MCL)
140
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 1.27 ppb | 58 | 31 | ND - 6.74 ppb |
| 2015 | 2.48 ppb | 27 | 26 | ND - 11.1 ppb |
| 2016 | 3.04 ppb | 31 | 31 | 0.296 ppb - 13.3 ppb |
| 2017 | 2.41 ppb | 26 | 26 | 0.359 ppb - 7.98 ppb |
| 2018 | 3.40 ppb | 22 | 22 | 0.524 ppb - 8.35 ppb |
| 2019 | 3.19 ppb | 24 | 24 | 0.306 ppb - 6.62 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 |
|---|---|---|
| 2014-02-11 | 4020214-01 | 1.45 ppb |
| 2014-02-11 | 4020214-02 | 2.13 ppb |
| 2014-02-11 | 4020214-04 | 1.30 ppb |
| 2014-02-11 | 4020214-03 | 6.40 ppb |
| 2014-02-19 | 4020380-01 | ND |
| 2014-02-19 | 4020380-02 | ND |
| 2014-02-19 | 4020380-03 | ND |
| 2014-02-19 | 4020380-04 | 2.34 ppb |
| 2014-02-19 | 4020380-05 | 0.510 ppb |
| 2014-02-19 | 4020380-10 | ND |
| 2014-02-19 | 4020380-06 | 0.570 ppb |
| 2014-02-19 | 4020380-07 | ND |
| 2014-02-19 | 4020380-11 | ND |
| 2014-02-19 | 4020380-08 | ND |
| 2014-02-19 | 4020380-12 | ND |
| 2014-02-19 | 4020380-09 | ND |
| 2014-02-19 | 4020380-13 | ND |
| 2014-05-06 | 4050147-01 | ND |
| 2014-05-06 | 4050147-02 | 2.12 ppb |
| 2014-05-06 | 4050147-04 | 1.17 ppb |
| 2014-05-06 | 4050147-03 | 4.85 ppb |
| 2014-05-07 | 4050321-01 | ND |
| 2014-05-07 | 4050321-02 | 0.730 ppb |
| 2014-05-07 | 4050321-03 | ND |
| 2014-05-07 | 4050321-04 | 4.34 ppb |
| 2014-05-07 | 4050321-05 | 2.93 ppb |
| 2014-05-07 | 4050322-01 | ND |
| 2014-05-07 | 4050321-06 | 1.69 ppb |
| 2014-05-07 | 4050321-07 | ND |
| 2014-05-07 | 4050321-08 | ND |
| 2014-05-07 | 4050321-09 | 0.370 ppb |
| 2014-08-12 | 4080392-01 | 4.06 ppb |
| 2014-08-12 | 4080392-02 | 4.81 ppb |
| 2014-08-12 | 4080392-04 | 1.52 ppb |
| 2014-08-12 | 4080392-03 | 6.74 ppb |
| 2014-08-13 | 4080458-01 | ND |
| 2014-08-13 | 4080458-02 | ND |
| 2014-08-13 | 4080458-03 | ND |
| 2014-08-13 | 4080458-04 | 5.02 ppb |
| 2014-08-13 | 4080458-05 | 1.07 ppb |
| 2014-08-13 | 4080458-06 | 0.820 ppb |
| 2014-08-13 | 4080458-09 | ND |
| 2014-08-13 | 4080458-07 | 0.400 ppb |
| 2014-08-13 | 4080458-08 | ND |
| 2014-08-13 | 4080458-10 | 0.570 ppb |
| 2014-11-11 | 4110280-01 | 3.70 ppb |
| 2014-11-11 | 4110280-02 | 2.61 ppb |
| 2014-11-11 | 4110280-04 | ND |
| 2014-11-11 | 4110280-03 | 3.80 ppb |
| 2014-11-12 | 4110379-01 | ND |
| 2014-11-12 | 4110379-02 | ND |
| 2014-11-12 | 4110379-03 | ND |
| 2014-11-12 | 4110379-04 | 3.27 ppb |
| 2014-11-12 | 4110379-05 | 0.618 ppb |
| 2014-11-12 | 4110379-06 | ND |
| 2014-11-12 | 4110379-07 | 0.252 ppb |
| 2014-11-12 | 4110379-08 | ND |
| 2014-11-12 | 4110379-09 | 1.36 ppb |
| 2015-02-10 | 5020198-01 | 3.41 ppb |
| 2015-02-10 | 5020198-02 | 1.30 ppb |
| 2015-02-10 | 5020198-04 | 0.852 ppb |
| 2015-02-10 | 5020198-03 | 5.20 ppb |
| 2015-02-18 | 5020418-05 | 0.622 ppb |
| 2015-02-18 | 5020418-09 | 0.272 ppb |
| 2015-05-12 | 5050347-01 | 1.24 ppb |
| 2015-05-12 | 5050347-02 | 4.28 ppb |
| 2015-05-12 | 5050347-04 | ND |
| 2015-05-12 | 5050347-03 | 2.07 ppb |
| 2015-05-13 | 5050433-04 | 5.36 ppb |
| 2015-05-13 | 5050433-05 | 0.996 ppb |
| 2015-08-17 | 5080466-01 | 5.05 ppb |
| 2015-08-17 | 5080466-02 | 5.53 ppb |
| 2015-08-17 | 5080466-04 | 3.02 ppb |
| 2015-08-17 | 5080466-03 | 5.16 ppb |
| 2015-08-19 | 5080631-04 | 3.68 ppb |
| 2015-08-19 | 5080631-05 | 1.05 ppb |
| 2015-08-19 | 5080631-06 | 0.424 ppb |
| 2015-08-19 | 5080631-07 | 0.338 ppb |
| 2015-08-19 | 5080631-09 | 0.293 ppb |
| 2015-11-10 | 5110343-01 | 3.53 ppb |
| 2015-11-10 | 5110548-01 | 0.739 ppb |
| 2015-11-10 | 5110548-02 | 0.370 ppb |
| 2015-11-10 | 5110343-03 | 11.1 ppb |
| 2015-11-11 | 5110376-05 | 0.718 ppb |
| 2015-11-11 | 5110376-06 | 0.347 ppb |
| 2016-02-09 | 6020299-01 | 3.20 ppb |
| 2016-02-09 | 6020299-02 | 0.944 ppb |
| 2016-02-09 | 6020299-04 | 0.914 ppb |
| 2016-02-09 | 6020299-03 | 7.68 ppb |
| 2016-02-10 | 6020364-04 | 8.00 ppb |
| 2016-02-10 | 6020364-05 | 0.323 ppb |
| 2016-02-10 | 6020364-06 | 1.08 ppb |
| 2016-02-10 | 6020364-07 | 0.303 ppb |
| 2016-02-10 | 6020364-09 | 0.296 ppb |
| 2016-05-10 | 6050336-01 | 3.80 ppb |
| 2016-05-10 | 6050336-02 | 1.31 ppb |
| 2016-05-10 | 6050336-04 | 0.715 ppb |
| 2016-05-10 | 6050336-03 | 3.23 ppb |
| 2016-05-11 | 6050442-04 | 2.48 ppb |
| 2016-05-19 | 6050724-01 | 1.83 ppb |
| 2016-08-09 | 6080331-01 | 4.26 ppb |
| 2016-08-09 | 6080331-02 | 5.74 ppb |
| 2016-08-09 | 6080331-04 | 1.91 ppb |
| 2016-08-09 | 6080331-03 | 10.3 ppb |
| 2016-08-10 | 6080428-04 | 6.20 ppb |
| 2016-08-10 | 6080428-05 | 0.844 ppb |
| 2016-08-10 | 6080428-06 | 0.589 ppb |
| 2016-08-10 | 6080428-07 | 0.444 ppb |
| 2016-08-10 | 6080428-08 | 0.546 ppb |
| 2016-11-08 | 6110271-01 | 1.64 ppb |
| 2016-11-08 | 6110271-02 | 4.20 ppb |
| 2016-11-08 | 6110271-04 | 0.728 ppb |
| 2016-11-08 | 6110271-03 | 4.91 ppb |
| 2016-11-09 | 6110340-04 | 13.3 ppb |
| 2016-11-09 | 6110340-05 | 2.08 ppb |
| 2016-11-09 | 6110340-06 | 0.298 ppb |
| 2017-02-07 | 7020172-01 | 1.30 ppb |
| 2017-02-07 | 7020172-02 | 1.61 ppb |
| 2017-02-07 | 7020172-04 | 0.726 ppb |
| 2017-02-07 | 7020172-03 | 2.15 ppb |
| 2017-02-08 | 7020274-04 | 6.83 ppb |
| 2017-02-08 | 7020263-01 | 0.359 ppb |
| 2017-02-08 | 7020274-05 | 0.392 ppb |
| 2017-02-08 | 7020263-02 | 0.881 ppb |
| 2017-02-08 | 7020263-03 | 0.572 ppb |
| 2017-02-08 | 7020263-04 | 0.850 ppb |
| 2017-05-08 | 7050293-01 | 1.36 ppb |
| 2017-05-08 | 7050293-02 | 1.27 ppb |
| 2017-05-08 | 7050293-04 | 0.606 ppb |
| 2017-05-08 | 7050293-03 | 2.36 ppb |
| 2017-05-23 | 7050837-01 | 2.72 ppb |
| 2017-08-08 | 7080295-01 | 4.61 ppb |
| 2017-08-08 | 7080295-02 | 5.19 ppb |
| 2017-08-08 | 7080295-04 | 1.19 ppb |
| 2017-08-08 | 7080295-03 | 4.74 ppb |
| 2017-08-08 | 7080309-04 | 2.05 ppb |
| 2017-10-24 | 7100742-01 | 2.63 ppb |
| 2017-11-08 | 7110361-01 | 3.98 ppb |
| 2017-11-08 | 7110361-02 | 2.80 ppb |
| 2017-11-08 | 7110361-04 | 1.33 ppb |
| 2017-11-08 | 7110361-03 | 7.98 ppb |
| 2017-11-08 | 7110363-04 | 2.08 ppb |
| 2018-02-06 | 8020145-01 | 1.58 ppb |
| 2018-02-06 | 8020145-02 | 1.59 ppb |
| 2018-02-06 | 8020145-04 | 0.589 ppb |
| 2018-02-06 | 8020145-03 | 4.86 ppb |
| 2018-05-08 | 8050346-01 | 1.26 ppb |
| 2018-05-08 | 8050346-02 | 1.61 ppb |
| 2018-05-08 | 8050346-04 | 1.16 ppb |
| 2018-05-08 | 8050346-03 | 3.85 ppb |
| 2018-06-14 | 8060637-01 | 1.39 ppb |
| 2018-08-07 | 8080279-01 | 4.47 ppb |
| 2018-08-07 | 8080279-02 | 8.30 ppb |
| 2018-08-07 | 8080279-04 | 6.91 ppb |
| 2018-08-07 | 8080279-03 | 3.21 ppb |
| 2018-08-08 | 8080402-04 | 0.580 ppb |
| 2018-08-08 | 8080402-05 | 0.600 ppb |
| 2018-08-08 | 8080402-07 | 0.524 ppb |
| 2018-08-09 | 8080402-03 | 8.25 ppb |
| 2018-11-07 | 8110298-01 | 4.79 ppb |
| 2018-11-07 | 8110298-02 | 2.88 ppb |
| 2018-11-07 | 8110298-04 | 2.93 ppb |
| 2018-11-07 | 8110298-03 | 8.35 ppb |
| 2018-11-14 | 8110634-04 | 5.22 ppb |
| 2019-02-05 | 9020137-01 | 2.08 ppb |
| 2019-02-05 | 9020137-02 | 2.06 ppb |
| 2019-02-05 | 9020137-04 | 1.40 ppb |
| 2019-02-05 | 9020137-03 | 5.14 ppb |
| 2019-02-06 | 9020299-04 | 3.31 ppb |
| 2019-02-06 | 9020299-08 | 0.486 ppb |
| 2019-05-07 | 9050311-01 | 1.72 ppb |
| 2019-05-07 | 9050311-02 | 3.88 ppb |
| 2019-05-07 | 9050311-04 | 1.01 ppb |
| 2019-05-07 | 9050311-03 | 6.62 ppb |
| 2019-05-08 | 9050447-04 | 3.58 ppb |
| 2019-05-08 | 9050447-08 | 0.424 ppb |
| 2019-08-06 | 9080242-01 | 6.37 ppb |
| 2019-08-06 | 9080242-02 | 5.94 ppb |
| 2019-08-06 | 9080242-04 | 1.95 ppb |
| 2019-08-06 | 9080242-03 | 5.57 ppb |
| 2019-08-07 | 9080439-04 | 4.12 ppb |
| 2019-08-07 | 9080439-05 | 0.467 ppb |
| 2019-11-05 | 9110196-01 | 2.52 ppb |
| 2019-11-05 | 9110196-02 | 3.38 ppb |
| 2019-11-05 | 9110196-04 | 3.45 ppb |
| 2019-11-05 | 9110196-03 | 6.04 ppb |
| 2019-11-06 | 9110381-04 | 4.82 ppb |
| 2019-11-06 | 9110381-05 | 0.306 ppb |