Total trihalomethanes (TTHMs)
City of Panama City Beach
Trihalomethanes are cancer-causing contaminants that form during water treatment with chlorine and other disinfectants. The total trihalomethanes group includes four chemicals: chloroform, bromodichloromethane, dibromochloromethane and bromoform. Read More.
Studies conducted in the U.S. and Europe have found that drinking tap water that carries disinfection byproducts increases the risk of developing bladder cancer. In animal studies, all trihalomethanes cause liver, kidney and intestinal tumors. Some human epidemiological studies also reported an association between disinfection byproducts and an increased risk of problems during pregnancy, including spontaneous miscarriage, cardiovascular defects, neural tube defects and low birth weight.
The health guideline of 0.15 parts per billion, or ppb, for the group of four trihalomethanes, or THM4/TTHM, was defined in a peer-reviewed scientific study by EWG and represents a one-in-one-million lifetime cancer risk level.
607
Samples
0
Samples exceeding legal limit (MCL)
607
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 42.7 ppb | 119 | 119 | 17.6 ppb - 74.2 ppb |
| 2015 | 35.0 ppb | 96 | 96 | 17.5 ppb - 68.2 ppb |
| 2016 | 33.0 ppb | 104 | 104 | 11.9 ppb - 54.9 ppb |
| 2017 | 31.8 ppb | 104 | 104 | 13.9 ppb - 65.0 ppb |
| 2018 | 40.1 ppb | 88 | 88 | 13.9 ppb - 75.5 ppb |
| 2019 | 31.1 ppb | 96 | 96 | 9.70 ppb - 61.0 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.15 ppb
The health guideline of 0.15 parts per billion, or ppb, for the group of four trihalomethanes, or THM4/TTHM, was defined in a peer-reviewed scientific study by EWG and represents a one-in-one-million lifetime cancer risk level.
EPA Maximum Contaminant
Level (MCL) 80 ppb
The legal limit for the group of four trihalomethanes, established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer due to exposure to trihalomethanes.
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2014-01-09 | 26.1 ppb |
| 2014-01-09 | 32.7 ppb |
| 2014-01-09 | 17.7 ppb |
| 2014-01-09 | 30.8 ppb |
| 2014-01-09 | 29.8 ppb |
| 2014-01-09 | 29.0 ppb |
| 2014-01-09 | 30.0 ppb |
| 2014-01-09 | 28.4 ppb |
| 2014-01-09 | 17.6 ppb |
| 2014-01-09 | 21.0 ppb |
| 2014-02-13 | 23.8 ppb |
| 2014-02-13 | 33.5 ppb |
| 2014-02-13 | 22.8 ppb |
| 2014-02-13 | 24.4 ppb |
| 2014-02-13 | 24.7 ppb |
| 2014-02-13 | 24.6 ppb |
| 2014-02-13 | 23.8 ppb |
| 2014-02-13 | 24.7 ppb |
| 2014-02-13 | 19.1 ppb |
| 2014-02-13 | 27.8 ppb |
| 2014-03-12 | 56.2 ppb |
| 2014-03-12 | 46.4 ppb |
| 2014-03-12 | 38.3 ppb |
| 2014-03-12 | 47.5 ppb |
| 2014-03-12 | 49.7 ppb |
| 2014-03-12 | 50.3 ppb |
| 2014-03-12 | 49.4 ppb |
| 2014-03-12 | 50.5 ppb |
| 2014-03-12 | 32.7 ppb |
| 2014-03-12 | 46.0 ppb |
| 2014-04-10 | 43.8 ppb |
| 2014-04-10 | 51.8 ppb |
| 2014-04-10 | 44.4 ppb |
| 2014-04-10 | 56.1 ppb |
| 2014-04-10 | 60.1 ppb |
| 2014-04-10 | 59.6 ppb |
| 2014-04-10 | 58.7 ppb |
| 2014-04-10 | 60.8 ppb |
| 2014-04-10 | 37.1 ppb |
| 2014-04-10 | 46.9 ppb |
| 2014-05-04 | 49.8 ppb |
| 2014-05-04 | 57.3 ppb |
| 2014-05-04 | 53.0 ppb |
| 2014-05-04 | 59.2 ppb |
| 2014-05-04 | 57.6 ppb |
| 2014-05-04 | 61.9 ppb |
| 2014-05-04 | 55.2 ppb |
| 2014-05-04 | 61.9 ppb |
| 2014-05-04 | 41.2 ppb |
| 2014-05-04 | 39.8 ppb |
| 2014-06-11 | 52.4 ppb |
| 2014-06-11 | 70.1 ppb |
| 2014-06-11 | 50.3 ppb |
| 2014-06-11 | 51.8 ppb |
| 2014-06-11 | 61.2 ppb |
| 2014-06-11 | 63.3 ppb |
| 2014-06-11 | 58.9 ppb |
| 2014-06-11 | 64.8 ppb |
| 2014-06-11 | 55.4 ppb |
| 2014-07-10 | 59.6 ppb |
| 2014-07-10 | 67.0 ppb |
| 2014-07-10 | 57.7 ppb |
| 2014-07-10 | 70.4 ppb |
| 2014-07-10 | 73.0 ppb |
| 2014-07-10 | 74.2 ppb |
| 2014-07-10 | 68.8 ppb |
| 2014-07-10 | 73.5 ppb |
| 2014-07-10 | 43.4 ppb |
| 2014-07-10 | 51.9 ppb |
| 2014-08-13 | 49.6 ppb |
| 2014-08-13 | 63.3 ppb |
| 2014-08-13 | 46.7 ppb |
| 2014-08-13 | 58.1 ppb |
| 2014-08-13 | 56.2 ppb |
| 2014-08-13 | 62.7 ppb |
| 2014-08-13 | 67.6 ppb |
| 2014-08-13 | 64.7 ppb |
| 2014-08-13 | 36.7 ppb |
| 2014-08-13 | 47.6 ppb |
| 2014-09-10 | 33.3 ppb |
| 2014-09-10 | 35.8 ppb |
| 2014-09-10 | 29.8 ppb |
| 2014-09-10 | 39.0 ppb |
| 2014-09-10 | 37.5 ppb |
| 2014-09-10 | 39.8 ppb |
| 2014-09-10 | 35.4 ppb |
| 2014-09-10 | 39.7 ppb |
| 2014-09-10 | 22.1 ppb |
| 2014-09-10 | 32.7 ppb |
| 2014-10-09 | 33.9 ppb |
| 2014-10-09 | 36.2 ppb |
| 2014-10-09 | 32.8 ppb |
| 2014-10-09 | 41.1 ppb |
| 2014-10-09 | 38.7 ppb |
| 2014-10-09 | 40.6 ppb |
| 2014-10-09 | 37.6 ppb |
| 2014-10-09 | 42.0 ppb |
| 2014-10-09 | 25.6 ppb |
| 2014-10-09 | 25.8 ppb |
| 2014-11-12 | 37.4 ppb |
| 2014-11-12 | 33.5 ppb |
| 2014-11-12 | 27.9 ppb |
| 2014-11-12 | 32.3 ppb |
| 2014-11-12 | 33.3 ppb |
| 2014-11-12 | 40.7 ppb |
| 2014-11-12 | 34.0 ppb |
| 2014-11-12 | 34.9 ppb |
| 2014-11-12 | 22.3 ppb |
| 2014-11-12 | 27.2 ppb |
| 2014-12-10 | 28.5 ppb |
| 2014-12-10 | 30.6 ppb |
| 2014-12-10 | 27.3 ppb |
| 2014-12-10 | 33.1 ppb |
| 2014-12-10 | 32.8 ppb |
| 2014-12-10 | 34.1 ppb |
| 2014-12-10 | 33.0 ppb |
| 2014-12-10 | 34.9 ppb |
| 2014-12-10 | 25.2 ppb |
| 2014-12-10 | 25.8 ppb |
| 2015-01-15 | 41.3 ppb |
| 2015-01-15 | 42.0 ppb |
| 2015-01-15 | 34.8 ppb |
| 2015-01-15 | 42.9 ppb |
| 2015-01-15 | 41.8 ppb |
| 2015-01-15 | 46.1 ppb |
| 2015-01-15 | 40.3 ppb |
| 2015-01-15 | 45.7 ppb |
| 2015-02-11 | 49.3 ppb |
| 2015-02-11 | 60.8 ppb |
| 2015-02-11 | 47.8 ppb |
| 2015-02-11 | 51.8 ppb |
| 2015-02-11 | 51.2 ppb |
| 2015-02-11 | 54.7 ppb |
| 2015-02-11 | 46.1 ppb |
| 2015-02-11 | 50.5 ppb |
| 2015-03-11 | 30.4 ppb |
| 2015-03-11 | 32.2 ppb |
| 2015-03-11 | 29.3 ppb |
| 2015-03-11 | 32.4 ppb |
| 2015-03-11 | 31.9 ppb |
| 2015-03-11 | 33.2 ppb |
| 2015-03-11 | 32.4 ppb |
| 2015-03-11 | 34.4 ppb |
| 2015-04-08 | 25.9 ppb |
| 2015-04-08 | 27.8 ppb |
| 2015-04-08 | 25.7 ppb |
| 2015-04-08 | 31.3 ppb |
| 2015-04-08 | 30.5 ppb |
| 2015-04-08 | 32.1 ppb |
| 2015-04-08 | 29.2 ppb |
| 2015-04-08 | 32.7 ppb |
| 2015-05-18 | 46.2 ppb |
| 2015-05-18 | 51.8 ppb |
| 2015-05-18 | 45.6 ppb |
| 2015-05-18 | 48.8 ppb |
| 2015-05-18 | 65.9 ppb |
| 2015-05-18 | 68.2 ppb |
| 2015-05-18 | 65.2 ppb |
| 2015-05-18 | 66.6 ppb |
| 2015-06-10 | 39.2 ppb |
| 2015-06-10 | 38.7 ppb |
| 2015-06-10 | 35.5 ppb |
| 2015-06-10 | 44.5 ppb |
| 2015-06-10 | 46.0 ppb |
| 2015-06-10 | 46.4 ppb |
| 2015-06-10 | 43.3 ppb |
| 2015-06-10 | 48.1 ppb |
| 2015-07-08 | 39.3 ppb |
| 2015-07-08 | 41.1 ppb |
| 2015-07-08 | 36.9 ppb |
| 2015-07-08 | 45.0 ppb |
| 2015-07-08 | 45.4 ppb |
| 2015-07-08 | 45.3 ppb |
| 2015-07-08 | 43.6 ppb |
| 2015-07-08 | 44.5 ppb |
| 2015-08-13 | 23.6 ppb |
| 2015-08-13 | 61.3 ppb |
| 2015-08-13 | 21.8 ppb |
| 2015-08-13 | 31.4 ppb |
| 2015-08-13 | 29.0 ppb |
| 2015-08-13 | 33.3 ppb |
| 2015-08-13 | 26.7 ppb |
| 2015-08-13 | 37.5 ppb |
| 2015-09-09 | 21.7 ppb |
| 2015-09-09 | 25.0 ppb |
| 2015-09-09 | 19.5 ppb |
| 2015-09-09 | 28.1 ppb |
| 2015-09-09 | 28.5 ppb |
| 2015-09-09 | 31.3 ppb |
| 2015-09-09 | 27.1 ppb |
| 2015-09-09 | 28.9 ppb |
| 2015-10-08 | 17.7 ppb |
| 2015-10-08 | 21.2 ppb |
| 2015-10-08 | 17.5 ppb |
| 2015-10-08 | 20.7 ppb |
| 2015-10-08 | 22.2 ppb |
| 2015-10-08 | 23.9 ppb |
| 2015-10-08 | 19.3 ppb |
| 2015-10-08 | 23.2 ppb |
| 2015-11-10 | 20.8 ppb |
| 2015-11-10 | 23.2 ppb |
| 2015-11-10 | 20.6 ppb |
| 2015-11-10 | 22.2 ppb |
| 2015-11-10 | 21.6 ppb |
| 2015-11-10 | 23.4 ppb |
| 2015-11-10 | 20.9 ppb |
| 2015-11-10 | 23.2 ppb |
| 2015-12-10 | 19.7 ppb |
| 2015-12-10 | 25.0 ppb |
| 2015-12-10 | 18.9 ppb |
| 2015-12-10 | 20.7 ppb |
| 2015-12-10 | 20.9 ppb |
| 2015-12-10 | 21.8 ppb |
| 2015-12-10 | 20.2 ppb |
| 2015-12-10 | 21.4 ppb |
| 2016-01-12 | 46.7 ppb |
| 2016-01-12 | 52.3 ppb |
| 2016-01-12 | 53.4 ppb |
| 2016-01-12 | 50.9 ppb |
| 2016-01-12 | 52.1 ppb |
| 2016-01-12 | 54.9 ppb |
| 2016-01-12 | 52.3 ppb |
| 2016-01-12 | 53.8 ppb |
| 2016-02-11 | 48.9 ppb |
| 2016-02-11 | 48.4 ppb |
| 2016-02-11 | 44.8 ppb |
| 2016-02-11 | 51.1 ppb |
| 2016-02-11 | 45.7 ppb |
| 2016-02-11 | 47.9 ppb |
| 2016-02-11 | 44.6 ppb |
| 2016-02-11 | 46.8 ppb |
| 2016-03-10 | 34.7 ppb |
| 2016-03-10 | 34.0 ppb |
| 2016-03-10 | 40.1 ppb |
| 2016-03-10 | 36.6 ppb |
| 2016-03-10 | 36.6 ppb |
| 2016-03-10 | 34.9 ppb |
| 2016-03-10 | 39.5 ppb |
| 2016-03-10 | 32.3 ppb |
| 2016-04-14 | 21.5 ppb |
| 2016-04-14 | 22.5 ppb |
| 2016-04-14 | 19.0 ppb |
| 2016-04-14 | 18.4 ppb |
| 2016-04-14 | 20.2 ppb |
| 2016-04-14 | 22.1 ppb |
| 2016-04-14 | 22.5 ppb |
| 2016-04-14 | 19.1 ppb |
| 2016-05-12 | 20.3 ppb |
| 2016-05-12 | 32.0 ppb |
| 2016-05-12 | 26.3 ppb |
| 2016-05-12 | 33.9 ppb |
| 2016-05-12 | 29.8 ppb |
| 2016-05-12 | 30.3 ppb |
| 2016-05-12 | 26.6 ppb |
| 2016-05-12 | 30.9 ppb |
| 2016-05-12 | 19.2 ppb |
| 2016-05-12 | 29.0 ppb |
| 2016-06-09 | 28.9 ppb |
| 2016-06-09 | 30.1 ppb |
| 2016-06-09 | 29.5 ppb |
| 2016-06-09 | 31.2 ppb |
| 2016-06-09 | 29.5 ppb |
| 2016-06-09 | 27.7 ppb |
| 2016-06-09 | 30.2 ppb |
| 2016-06-09 | 29.1 ppb |
| 2016-06-09 | 29.6 ppb |
| 2016-07-12 | 42.8 ppb |
| 2016-07-12 | 36.6 ppb |
| 2016-07-12 | 37.3 ppb |
| 2016-07-12 | 34.3 ppb |
| 2016-07-12 | 42.5 ppb |
| 2016-07-12 | 42.1 ppb |
| 2016-07-12 | 41.0 ppb |
| 2016-07-12 | 32.3 ppb |
| 2016-07-12 | 43.1 ppb |
| 2016-08-10 | 46.5 ppb |
| 2016-08-10 | 29.8 ppb |
| 2016-08-10 | 46.3 ppb |
| 2016-08-10 | 42.5 ppb |
| 2016-08-10 | 49.3 ppb |
| 2016-08-10 | 47.5 ppb |
| 2016-08-10 | 52.0 ppb |
| 2016-08-10 | 49.9 ppb |
| 2016-08-10 | 50.8 ppb |
| 2016-09-14 | 36.0 ppb |
| 2016-09-14 | 37.2 ppb |
| 2016-09-14 | 36.3 ppb |
| 2016-09-14 | 34.7 ppb |
| 2016-09-14 | 35.9 ppb |
| 2016-09-14 | 37.1 ppb |
| 2016-09-14 | 36.9 ppb |
| 2016-09-14 | 32.2 ppb |
| 2016-10-12 | 32.2 ppb |
| 2016-10-12 | 33.6 ppb |
| 2016-10-12 | 34.1 ppb |
| 2016-10-12 | 27.4 ppb |
| 2016-10-12 | 36.6 ppb |
| 2016-10-12 | 34.6 ppb |
| 2016-10-12 | 37.5 ppb |
| 2016-10-12 | 30.0 ppb |
| 2016-11-10 | 14.1 ppb |
| 2016-11-10 | 15.4 ppb |
| 2016-11-10 | 13.7 ppb |
| 2016-11-10 | 13.8 ppb |
| 2016-11-10 | 16.2 ppb |
| 2016-11-10 | 11.9 ppb |
| 2016-11-10 | 36.1 ppb |
| 2016-11-10 | 15.1 ppb |
| 2016-11-10 | 14.1 ppb |
| 2016-12-14 | 14.2 ppb |
| 2016-12-14 | 15.0 ppb |
| 2016-12-14 | 13.2 ppb |
| 2016-12-14 | 17.2 ppb |
| 2016-12-14 | 20.3 ppb |
| 2016-12-14 | 19.1 ppb |
| 2016-12-14 | 14.0 ppb |
| 2016-12-14 | 19.7 ppb |
| 2016-12-14 | 15.0 ppb |
| 2016-12-14 | 19.6 ppb |
| 2017-01-12 | 33.2 ppb |
| 2017-01-12 | 27.0 ppb |
| 2017-01-12 | 41.6 ppb |
| 2017-01-12 | 44.0 ppb |
| 2017-01-12 | 42.0 ppb |
| 2017-01-12 | 44.6 ppb |
| 2017-01-12 | 38.3 ppb |
| 2017-01-12 | 30.6 ppb |
| 2017-01-13 | 65.0 ppb |
| 2017-02-15 | 30.6 ppb |
| 2017-02-15 | 34.7 ppb |
| 2017-02-15 | 28.8 ppb |
| 2017-02-15 | 32.3 ppb |
| 2017-02-15 | 31.5 ppb |
| 2017-02-15 | 20.8 ppb |
| 2017-02-15 | 31.3 ppb |
| 2017-02-15 | 29.6 ppb |
| 2017-02-15 | 32.9 ppb |
| 2017-03-15 | 22.1 ppb |
| 2017-03-15 | 24.2 ppb |
| 2017-03-15 | 20.1 ppb |
| 2017-03-15 | 26.1 ppb |
| 2017-03-15 | 24.8 ppb |
| 2017-03-15 | 26.5 ppb |
| 2017-03-15 | 23.8 ppb |
| 2017-03-15 | 24.5 ppb |
| 2017-04-12 | 24.8 ppb |
| 2017-04-12 | 29.0 ppb |
| 2017-04-12 | 25.7 ppb |
| 2017-04-12 | 29.2 ppb |
| 2017-04-12 | 30.2 ppb |
| 2017-04-12 | 29.4 ppb |
| 2017-04-12 | 35.5 ppb |
| 2017-04-12 | 32.0 ppb |
| 2017-05-11 | 26.5 ppb |
| 2017-05-11 | 24.3 ppb |
| 2017-05-11 | 25.9 ppb |
| 2017-05-11 | 25.1 ppb |
| 2017-05-11 | 13.9 ppb |
| 2017-05-11 | 24.0 ppb |
| 2017-05-11 | 22.1 ppb |
| 2017-05-11 | 24.0 ppb |
| 2017-05-11 | 20.1 ppb |
| 2017-06-14 | 40.6 ppb |
| 2017-06-14 | 32.5 ppb |
| 2017-06-14 | 37.3 ppb |
| 2017-06-14 | 44.3 ppb |
| 2017-06-14 | 35.7 ppb |
| 2017-06-14 | 21.9 ppb |
| 2017-06-14 | 38.6 ppb |
| 2017-06-14 | 32.4 ppb |
| 2017-06-14 | 26.0 ppb |
| 2017-06-14 | 36.8 ppb |
| 2017-07-20 | 56.4 ppb |
| 2017-07-20 | 58.6 ppb |
| 2017-07-20 | 57.0 ppb |
| 2017-07-20 | 50.7 ppb |
| 2017-07-20 | 59.8 ppb |
| 2017-07-20 | 43.3 ppb |
| 2017-07-20 | 54.9 ppb |
| 2017-08-15 | 42.3 ppb |
| 2017-08-15 | 46.7 ppb |
| 2017-08-15 | 41.2 ppb |
| 2017-08-15 | 37.4 ppb |
| 2017-08-15 | 46.7 ppb |
| 2017-08-15 | 42.9 ppb |
| 2017-08-15 | 42.7 ppb |
| 2017-08-15 | 41.8 ppb |
| 2017-08-15 | 43.9 ppb |
| 2017-08-15 | 42.3 ppb |
| 2017-08-15 | 41.2 ppb |
| 2017-08-15 | 37.4 ppb |
| 2017-09-13 | 42.9 ppb |
| 2017-09-13 | 39.5 ppb |
| 2017-09-13 | 31.8 ppb |
| 2017-09-13 | 39.1 ppb |
| 2017-09-13 | 37.1 ppb |
| 2017-09-13 | 45.4 ppb |
| 2017-09-13 | 36.7 ppb |
| 2017-09-13 | 36.8 ppb |
| 2017-10-12 | 20.7 ppb |
| 2017-10-12 | 22.0 ppb |
| 2017-10-12 | 21.3 ppb |
| 2017-10-12 | 24.9 ppb |
| 2017-10-12 | 24.0 ppb |
| 2017-10-12 | 24.6 ppb |
| 2017-10-12 | 23.4 ppb |
| 2017-10-12 | 25.0 ppb |
| 2017-11-15 | 19.0 ppb |
| 2017-11-15 | 21.0 ppb |
| 2017-11-15 | 18.4 ppb |
| 2017-11-15 | 20.9 ppb |
| 2017-11-15 | 20.4 ppb |
| 2017-11-15 | 22.5 ppb |
| 2017-11-15 | 19.7 ppb |
| 2017-11-15 | 22.5 ppb |
| 2017-12-14 | 15.7 ppb |
| 2017-12-14 | 19.9 ppb |
| 2017-12-14 | 15.8 ppb |
| 2017-12-14 | 17.6 ppb |
| 2017-12-14 | 16.7 ppb |
| 2017-12-14 | 17.2 ppb |
| 2017-12-14 | 15.9 ppb |
| 2017-12-14 | 19.1 ppb |
| 2018-01-16 | 16.5 ppb |
| 2018-01-16 | 13.9 ppb |
| 2018-01-16 | 16.3 ppb |
| 2018-01-16 | 13.9 ppb |
| 2018-01-16 | 16.5 ppb |
| 2018-01-16 | 15.2 ppb |
| 2018-01-16 | 16.6 ppb |
| 2018-01-16 | 15.9 ppb |
| 2018-02-15 | 26.0 ppb |
| 2018-02-15 | 24.6 ppb |
| 2018-02-15 | 26.3 ppb |
| 2018-02-15 | 26.3 ppb |
| 2018-02-15 | 25.4 ppb |
| 2018-02-15 | 25.8 ppb |
| 2018-02-15 | 25.3 ppb |
| 2018-02-15 | 25.6 ppb |
| 2018-03-14 | 23.8 ppb |
| 2018-03-14 | 28.3 ppb |
| 2018-03-14 | 28.7 ppb |
| 2018-03-14 | 25.9 ppb |
| 2018-03-14 | 28.2 ppb |
| 2018-03-14 | 30.9 ppb |
| 2018-03-14 | 31.4 ppb |
| 2018-03-15 | 28.1 ppb |
| 2018-04-12 | 18.5 ppb |
| 2018-04-12 | 20.9 ppb |
| 2018-04-12 | 19.2 ppb |
| 2018-04-12 | 22.4 ppb |
| 2018-04-12 | 24.9 ppb |
| 2018-04-12 | 26.7 ppb |
| 2018-04-12 | 23.8 ppb |
| 2018-04-12 | 25.7 ppb |
| 2018-05-17 | 32.6 ppb |
| 2018-05-17 | 35.0 ppb |
| 2018-05-17 | 32.4 ppb |
| 2018-05-17 | 36.6 ppb |
| 2018-05-17 | 47.1 ppb |
| 2018-05-17 | 45.5 ppb |
| 2018-05-17 | 42.0 ppb |
| 2018-05-17 | 51.0 ppb |
| 2018-06-14 | 57.1 ppb |
| 2018-06-14 | 58.8 ppb |
| 2018-06-14 | 55.4 ppb |
| 2018-06-14 | 62.2 ppb |
| 2018-06-14 | 72.0 ppb |
| 2018-06-14 | 75.2 ppb |
| 2018-06-14 | 66.5 ppb |
| 2018-06-14 | 74.9 ppb |
| 2018-07-12 | 74.7 ppb |
| 2018-07-12 | 62.8 ppb |
| 2018-07-12 | 62.9 ppb |
| 2018-07-12 | 60.9 ppb |
| 2018-07-12 | 65.6 ppb |
| 2018-07-12 | 71.2 ppb |
| 2018-07-12 | 75.5 ppb |
| 2018-07-12 | 68.7 ppb |
| 2018-08-16 | 60.2 ppb |
| 2018-08-16 | 64.5 ppb |
| 2018-08-16 | 59.0 ppb |
| 2018-08-16 | 63.4 ppb |
| 2018-08-16 | 72.3 ppb |
| 2018-08-16 | 74.1 ppb |
| 2018-08-16 | 71.5 ppb |
| 2018-08-16 | 74.4 ppb |
| 2018-09-20 | 65.4 ppb |
| 2018-09-20 | 62.4 ppb |
| 2018-09-20 | 63.8 ppb |
| 2018-09-20 | 65.6 ppb |
| 2018-09-20 | 60.5 ppb |
| 2018-09-20 | 50.3 ppb |
| 2018-09-20 | 57.0 ppb |
| 2018-09-20 | 51.8 ppb |
| 2018-11-27 | 21.3 ppb |
| 2018-11-27 | 28.6 ppb |
| 2018-11-27 | 26.8 ppb |
| 2018-11-27 | 29.5 ppb |
| 2018-11-27 | 28.3 ppb |
| 2018-11-27 | 24.6 ppb |
| 2018-11-27 | 20.6 ppb |
| 2018-11-27 | 30.3 ppb |
| 2018-12-13 | 19.9 ppb |
| 2018-12-13 | 25.3 ppb |
| 2018-12-13 | 20.2 ppb |
| 2018-12-13 | 22.5 ppb |
| 2018-12-13 | 22.7 ppb |
| 2018-12-13 | 24.4 ppb |
| 2018-12-13 | 22.0 ppb |
| 2018-12-13 | 24.7 ppb |
| 2019-01-15 | 25.7 ppb |
| 2019-01-15 | 19.8 ppb |
| 2019-01-15 | 16.0 ppb |
| 2019-01-15 | 24.3 ppb |
| 2019-01-15 | 24.1 ppb |
| 2019-01-15 | 25.7 ppb |
| 2019-01-15 | 23.8 ppb |
| 2019-01-15 | 15.3 ppb |
| 2019-02-14 | 12.8 ppb |
| 2019-02-14 | 17.1 ppb |
| 2019-02-14 | 20.6 ppb |
| 2019-02-14 | 18.8 ppb |
| 2019-02-14 | 17.1 ppb |
| 2019-02-14 | 20.1 ppb |
| 2019-02-14 | 13.0 ppb |
| 2019-02-14 | 15.7 ppb |
| 2019-03-14 | 20.0 ppb |
| 2019-03-14 | 17.6 ppb |
| 2019-03-14 | 20.1 ppb |
| 2019-03-14 | 22.1 ppb |
| 2019-03-14 | 22.5 ppb |
| 2019-03-14 | 20.9 ppb |
| 2019-03-14 | 23.5 ppb |
| 2019-03-14 | 17.5 ppb |
| 2019-04-17 | 37.8 ppb |
| 2019-04-17 | 32.6 ppb |
| 2019-04-17 | 28.8 ppb |
| 2019-04-17 | 33.4 ppb |
| 2019-04-17 | 36.2 ppb |
| 2019-04-17 | 37.2 ppb |
| 2019-04-17 | 36.6 ppb |
| 2019-04-17 | 31.5 ppb |
| 2019-05-15 | 41.0 ppb |
| 2019-05-15 | 44.1 ppb |
| 2019-05-15 | 46.9 ppb |
| 2019-05-15 | 51.6 ppb |
| 2019-05-15 | 44.2 ppb |
| 2019-05-15 | 46.3 ppb |
| 2019-05-15 | 33.7 ppb |
| 2019-05-15 | 39.6 ppb |
| 2019-06-12 | 38.7 ppb |
| 2019-06-12 | 54.8 ppb |
| 2019-06-12 | 44.1 ppb |
| 2019-06-12 | 38.8 ppb |
| 2019-06-12 | 44.5 ppb |
| 2019-06-12 | 51.3 ppb |
| 2019-06-12 | 51.2 ppb |
| 2019-06-12 | 46.7 ppb |
| 2019-07-22 | 38.3 ppb |
| 2019-07-22 | 41.1 ppb |
| 2019-07-22 | 37.1 ppb |
| 2019-07-22 | 46.3 ppb |
| 2019-07-22 | 54.3 ppb |
| 2019-07-22 | 55.1 ppb |
| 2019-07-22 | 48.1 ppb |
| 2019-07-22 | 55.9 ppb |
| 2019-08-20 | 49.9 ppb |
| 2019-08-20 | 51.3 ppb |
| 2019-08-20 | 48.7 ppb |
| 2019-08-20 | 51.0 ppb |
| 2019-08-20 | 60.8 ppb |
| 2019-08-20 | 61.0 ppb |
| 2019-08-20 | 57.2 ppb |
| 2019-08-20 | 60.9 ppb |
| 2019-09-19 | 40.8 ppb |
| 2019-09-19 | 28.0 ppb |
| 2019-09-19 | 20.1 ppb |
| 2019-09-19 | 26.9 ppb |
| 2019-09-19 | 29.7 ppb |
| 2019-09-19 | 40.0 ppb |
| 2019-09-19 | 43.7 ppb |
| 2019-09-19 | 45.5 ppb |
| 2019-10-16 | 21.6 ppb |
| 2019-10-16 | 20.7 ppb |
| 2019-10-16 | 27.5 ppb |
| 2019-10-16 | 22.2 ppb |
| 2019-10-16 | 27.6 ppb |
| 2019-10-16 | 20.9 ppb |
| 2019-10-16 | 26.3 ppb |
| 2019-10-16 | 23.2 ppb |
| 2019-11-14 | 13.8 ppb |
| 2019-11-14 | 15.7 ppb |
| 2019-11-14 | 16.7 ppb |
| 2019-11-14 | 18.8 ppb |
| 2019-11-14 | 14.8 ppb |
| 2019-11-14 | 17.7 ppb |
| 2019-11-14 | 9.70 ppb |
| 2019-11-14 | 13.7 ppb |
| 2019-12-18 | 17.8 ppb |
| 2019-12-18 | 16.6 ppb |
| 2019-12-18 | 10.5 ppb |
| 2019-12-18 | 15.7 ppb |
| 2019-12-18 | 13.1 ppb |
| 2019-12-18 | 14.6 ppb |
| 2019-12-18 | 12.1 ppb |
| 2019-12-18 | 16.5 ppb |