Trichloroacetic acid
Massachusetts Water Resources Authority (MWRA)
Trichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
629
Samples
0
Samples exceeding legal limit (MCL)
316
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 3.83 ppb | 24 | 14 | ND - 16.6 ppb |
| 2015 | 1.22 ppb | 152 | 75 | ND - 12.7 ppb |
| 2016 | 0.110 ppb | 128 | 12 | ND - 1.75 ppb |
| 2017 | 0.597 ppb | 128 | 55 | ND - 1.81 ppb |
| 2018 | 1.13 ppb | 65 | 57 | ND - 1.64 ppb |
| 2019 | 1.51 ppb | 132 | 103 | ND - 3.03 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.1 ppb
The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.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 | Result |
|---|---|
| 2014-01-06 | ND |
| 2014-01-07 | 5.03 ppb |
| 2014-02-03 | ND |
| 2014-02-04 | 4.69 ppb |
| 2014-03-03 | 6.40 ppb |
| 2014-03-03 | ND |
| 2014-04-07 | ND |
| 2014-04-07 | ND |
| 2014-05-05 | 10.5 ppb |
| 2014-05-05 | ND |
| 2014-06-02 | ND |
| 2014-06-06 | 16.6 ppb |
| 2014-07-07 | ND |
| 2014-07-08 | ND |
| 2014-08-05 | 11.3 ppb |
| 2014-08-05 | ND |
| 2014-09-09 | 8.49 ppb |
| 2014-09-09 | 1.72 ppb |
| 2014-10-06 | 1.66 ppb |
| 2014-10-07 | 8.80 ppb |
| 2014-11-04 | 9.92 ppb |
| 2014-11-04 | 1.000 ppb |
| 2014-12-01 | 1.43 ppb |
| 2014-12-02 | 4.29 ppb |
| 2015-01-05 | ND |
| 2015-01-06 | 5.57 ppb |
| 2015-02-02 | 1.20 ppb |
| 2015-02-03 | 5.19 ppb |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-17 | ND |
| 2015-02-18 | ND |
| 2015-02-18 | 1.08 ppb |
| 2015-02-18 | 1.10 ppb |
| 2015-02-18 | ND |
| 2015-02-18 | ND |
| 2015-02-18 | 1.37 ppb |
| 2015-02-18 | ND |
| 2015-02-18 | ND |
| 2015-02-18 | ND |
| 2015-02-18 | ND |
| 2015-02-18 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-02-19 | ND |
| 2015-03-02 | ND |
| 2015-03-03 | 5.88 ppb |
| 2015-04-06 | ND |
| 2015-04-07 | 4.99 ppb |
| 2015-05-04 | 8.71 ppb |
| 2015-05-04 | 1.34 ppb |
| 2015-05-18 | 1.03 ppb |
| 2015-05-18 | 1.24 ppb |
| 2015-05-18 | 1.52 ppb |
| 2015-05-18 | 1.59 ppb |
| 2015-05-18 | 1.44 ppb |
| 2015-05-18 | 1.06 ppb |
| 2015-05-19 | 1.24 ppb |
| 2015-05-19 | 1.18 ppb |
| 2015-05-19 | 1.23 ppb |
| 2015-05-19 | 1.24 ppb |
| 2015-05-19 | 1.29 ppb |
| 2015-05-19 | 1.15 ppb |
| 2015-05-19 | 1.36 ppb |
| 2015-05-19 | 1.17 ppb |
| 2015-05-19 | ND |
| 2015-05-20 | 1.09 ppb |
| 2015-05-20 | ND |
| 2015-05-20 | 1.06 ppb |
| 2015-05-20 | 1.28 ppb |
| 2015-05-20 | 1.32 ppb |
| 2015-05-20 | 1.15 ppb |
| 2015-05-20 | 1.09 ppb |
| 2015-05-20 | 1.09 ppb |
| 2015-05-21 | 1.69 ppb |
| 2015-05-21 | 1.58 ppb |
| 2015-05-21 | 1.62 ppb |
| 2015-05-21 | 1.60 ppb |
| 2015-05-21 | 1.09 ppb |
| 2015-05-21 | 1.14 ppb |
| 2015-05-21 | ND |
| 2015-05-21 | 1.68 ppb |
| 2015-05-22 | 1.61 ppb |
| 2015-06-01 | 1.61 ppb |
| 2015-06-02 | 12.4 ppb |
| 2015-07-06 | 1.25 ppb |
| 2015-07-07 | 11.2 ppb |
| 2015-08-03 | 1.25 ppb |
| 2015-08-04 | 12.7 ppb |
| 2015-08-17 | 1.81 ppb |
| 2015-08-17 | 1.84 ppb |
| 2015-08-17 | 1.14 ppb |
| 2015-08-17 | 1.78 ppb |
| 2015-08-17 | 1.82 ppb |
| 2015-08-17 | 1.87 ppb |
| 2015-08-17 | 1.03 ppb |
| 2015-08-17 | 1.73 ppb |
| 2015-08-17 | 1.40 ppb |
| 2015-08-18 | 1.76 ppb |
| 2015-08-18 | 1.48 ppb |
| 2015-08-18 | 1.65 ppb |
| 2015-08-18 | 1.21 ppb |
| 2015-08-18 | ND |
| 2015-08-18 | 1.67 ppb |
| 2015-08-18 | 1.55 ppb |
| 2015-08-19 | 1.08 ppb |
| 2015-08-19 | 1.06 ppb |
| 2015-08-19 | ND |
| 2015-08-19 | ND |
| 2015-08-19 | ND |
| 2015-08-19 | 1.11 ppb |
| 2015-08-19 | 1.04 ppb |
| 2015-08-19 | 1.17 ppb |
| 2015-08-20 | 1.04 ppb |
| 2015-08-20 | 1.04 ppb |
| 2015-08-20 | 1.06 ppb |
| 2015-08-20 | ND |
| 2015-08-20 | 1.09 ppb |
| 2015-08-20 | 1.05 ppb |
| 2015-08-20 | ND |
| 2015-08-20 | ND |
| 2015-09-08 | 12.4 ppb |
| 2015-09-08 | ND |
| 2015-10-05 | ND |
| 2015-10-06 | 6.86 ppb |
| 2015-11-02 | 1.16 ppb |
| 2015-11-03 | 7.82 ppb |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-16 | ND |
| 2015-11-17 | ND |
| 2015-11-17 | ND |
| 2015-11-17 | ND |
| 2015-11-17 | ND |
| 2015-11-17 | ND |
| 2015-11-17 | ND |
| 2015-11-17 | ND |
| 2015-11-18 | ND |
| 2015-11-18 | ND |
| 2015-11-18 | ND |
| 2015-11-18 | ND |
| 2015-11-18 | ND |
| 2015-11-18 | ND |
| 2015-11-18 | ND |
| 2015-11-18 | ND |
| 2015-11-19 | ND |
| 2015-11-19 | ND |
| 2015-11-19 | ND |
| 2015-11-19 | ND |
| 2015-11-19 | ND |
| 2015-11-19 | ND |
| 2015-11-19 | ND |
| 2015-11-19 | ND |
| 2015-12-07 | ND |
| 2015-12-08 | 7.57 ppb |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-16 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-17 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-02-18 | ND |
| 2016-05-16 | ND |
| 2016-05-16 | ND |
| 2016-05-16 | ND |
| 2016-05-16 | ND |
| 2016-05-16 | ND |
| 2016-05-16 | 1.08 ppb |
| 2016-05-16 | 1.02 ppb |
| 2016-05-16 | ND |
| 2016-05-16 | ND |
| 2016-05-17 | ND |
| 2016-05-17 | ND |
| 2016-05-17 | ND |
| 2016-05-17 | ND |
| 2016-05-17 | ND |
| 2016-05-17 | ND |
| 2016-05-17 | ND |
| 2016-05-18 | ND |
| 2016-05-18 | 1.12 ppb |
| 2016-05-18 | 1.04 ppb |
| 2016-05-18 | ND |
| 2016-05-18 | ND |
| 2016-05-18 | ND |
| 2016-05-18 | 1.03 ppb |
| 2016-05-18 | ND |
| 2016-05-19 | 1.51 ppb |
| 2016-05-19 | 1.75 ppb |
| 2016-05-19 | ND |
| 2016-05-19 | 1.28 ppb |
| 2016-05-19 | ND |
| 2016-05-19 | 1.02 ppb |
| 2016-05-19 | ND |
| 2016-05-19 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-15 | ND |
| 2016-08-16 | ND |
| 2016-08-16 | ND |
| 2016-08-16 | ND |
| 2016-08-16 | ND |
| 2016-08-16 | ND |
| 2016-08-16 | ND |
| 2016-08-16 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | 1.01 ppb |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-18 | 1.13 ppb |
| 2016-08-18 | ND |
| 2016-08-18 | ND |
| 2016-08-18 | ND |
| 2016-08-18 | ND |
| 2016-08-18 | 1.12 ppb |
| 2016-08-18 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-14 | ND |
| 2016-11-15 | ND |
| 2016-11-15 | ND |
| 2016-11-15 | ND |
| 2016-11-15 | ND |
| 2016-11-15 | ND |
| 2016-11-15 | ND |
| 2016-11-15 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-16 | ND |
| 2016-11-17 | ND |
| 2016-11-17 | ND |
| 2016-11-17 | ND |
| 2016-11-17 | ND |
| 2016-11-17 | ND |
| 2016-11-17 | ND |
| 2016-11-17 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-13 | ND |
| 2017-02-14 | ND |
| 2017-02-14 | ND |
| 2017-02-14 | ND |
| 2017-02-14 | ND |
| 2017-02-14 | ND |
| 2017-02-14 | ND |
| 2017-02-14 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-02-16 | ND |
| 2017-02-16 | ND |
| 2017-02-16 | ND |
| 2017-02-16 | ND |
| 2017-02-16 | ND |
| 2017-02-16 | ND |
| 2017-02-16 | ND |
| 2017-02-16 | ND |
| 2017-05-15 | ND |
| 2017-05-15 | ND |
| 2017-05-15 | 1.07 ppb |
| 2017-05-15 | 1.14 ppb |
| 2017-05-15 | 1.14 ppb |
| 2017-05-15 | 1.25 ppb |
| 2017-05-15 | 1.14 ppb |
| 2017-05-15 | ND |
| 2017-05-15 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-05-17 | 1.13 ppb |
| 2017-05-17 | 1.18 ppb |
| 2017-05-17 | 1.10 ppb |
| 2017-05-17 | 1.12 ppb |
| 2017-05-17 | 1.09 ppb |
| 2017-05-17 | 1.24 ppb |
| 2017-05-17 | 1.45 ppb |
| 2017-05-17 | ND |
| 2017-05-18 | 1.30 ppb |
| 2017-05-18 | ND |
| 2017-05-18 | 1.09 ppb |
| 2017-05-18 | 1.24 ppb |
| 2017-05-18 | 1.10 ppb |
| 2017-05-18 | ND |
| 2017-05-18 | ND |
| 2017-05-18 | ND |
| 2017-05-18 | ND |
| 2017-05-18 | 1.26 ppb |
| 2017-08-14 | 1.60 ppb |
| 2017-08-14 | 1.49 ppb |
| 2017-08-14 | 1.69 ppb |
| 2017-08-14 | 1.74 ppb |
| 2017-08-14 | 1.70 ppb |
| 2017-08-14 | 1.71 ppb |
| 2017-08-14 | 1.48 ppb |
| 2017-08-14 | 1.81 ppb |
| 2017-08-14 | 1.70 ppb |
| 2017-08-15 | 1.61 ppb |
| 2017-08-15 | 1.62 ppb |
| 2017-08-15 | 1.54 ppb |
| 2017-08-15 | 1.48 ppb |
| 2017-08-15 | 1.56 ppb |
| 2017-08-16 | 1.22 ppb |
| 2017-08-16 | 1.66 ppb |
| 2017-08-16 | 1.63 ppb |
| 2017-08-16 | 1.63 ppb |
| 2017-08-16 | 1.45 ppb |
| 2017-08-16 | 1.31 ppb |
| 2017-08-16 | 1.50 ppb |
| 2017-08-16 | 1.38 ppb |
| 2017-08-16 | 1.42 ppb |
| 2017-08-16 | 1.56 ppb |
| 2017-08-17 | 1.28 ppb |
| 2017-08-17 | 1.29 ppb |
| 2017-08-17 | 1.43 ppb |
| 2017-08-17 | 1.47 ppb |
| 2017-08-17 | 1.62 ppb |
| 2017-08-17 | 1.53 ppb |
| 2017-08-17 | 1.51 ppb |
| 2017-08-17 | 1.50 ppb |
| 2017-11-13 | ND |
| 2017-11-13 | 1.04 ppb |
| 2017-11-13 | ND |
| 2017-11-13 | ND |
| 2017-11-13 | ND |
| 2017-11-13 | ND |
| 2017-11-13 | ND |
| 2017-11-13 | ND |
| 2017-11-13 | 1.24 ppb |
| 2017-11-14 | ND |
| 2017-11-14 | ND |
| 2017-11-14 | ND |
| 2017-11-14 | ND |
| 2017-11-14 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | ND |
| 2017-11-15 | 1.29 ppb |
| 2017-11-16 | ND |
| 2017-11-16 | ND |
| 2017-11-16 | 1.17 ppb |
| 2017-11-16 | ND |
| 2017-11-16 | 1.22 ppb |
| 2017-11-16 | ND |
| 2017-11-16 | ND |
| 2017-11-16 | 1.30 ppb |
| 2018-05-01 | 1.11 ppb |
| 2018-08-13 | 1.29 ppb |
| 2018-08-13 | 1.33 ppb |
| 2018-08-13 | 1.26 ppb |
| 2018-08-14 | 1.27 ppb |
| 2018-08-14 | 1.36 ppb |
| 2018-08-14 | 1.29 ppb |
| 2018-08-14 | 1.22 ppb |
| 2018-08-14 | ND |
| 2018-08-15 | 1.10 ppb |
| 2018-08-15 | 1.13 ppb |
| 2018-08-15 | 1.07 ppb |
| 2018-08-15 | 1.01 ppb |
| 2018-08-15 | ND |
| 2018-08-15 | 1.09 ppb |
| 2018-08-15 | ND |
| 2018-08-15 | 1.09 ppb |
| 2018-08-16 | 1.01 ppb |
| 2018-08-16 | 1.62 ppb |
| 2018-08-16 | 1.06 ppb |
| 2018-08-16 | 1.48 ppb |
| 2018-08-16 | 1.53 ppb |
| 2018-08-16 | 1.48 ppb |
| 2018-08-16 | 1.02 ppb |
| 2018-08-16 | 1.53 ppb |
| 2018-08-16 | 1.44 ppb |
| 2018-08-16 | ND |
| 2018-08-16 | ND |
| 2018-08-16 | ND |
| 2018-08-16 | ND |
| 2018-08-16 | ND |
| 2018-08-16 | 1.64 ppb |
| 2018-08-16 | 1.50 ppb |
| 2018-11-14 | 1.28 ppb |
| 2018-11-14 | 1.22 ppb |
| 2018-11-14 | 1.23 ppb |
| 2018-11-14 | 1.22 ppb |
| 2018-11-14 | 1.16 ppb |
| 2018-11-14 | 1.26 ppb |
| 2018-11-14 | 1.28 ppb |
| 2018-11-14 | 1.20 ppb |
| 2018-11-14 | 1.17 ppb |
| 2018-11-14 | 1.39 ppb |
| 2018-11-14 | 1.32 ppb |
| 2018-11-14 | 1.20 ppb |
| 2018-11-14 | 1.15 ppb |
| 2018-11-14 | 1.13 ppb |
| 2018-11-15 | 1.58 ppb |
| 2018-11-15 | 1.08 ppb |
| 2018-11-15 | 1.40 ppb |
| 2018-11-15 | 1.42 ppb |
| 2018-11-15 | 1.55 ppb |
| 2018-11-15 | 1.44 ppb |
| 2018-11-15 | 1.40 ppb |
| 2018-11-15 | 1.28 ppb |
| 2018-11-15 | 1.16 ppb |
| 2018-11-15 | 1.42 ppb |
| 2018-11-16 | 1.52 ppb |
| 2018-11-16 | 1.30 ppb |
| 2018-11-16 | 1.20 ppb |
| 2018-11-16 | 1.05 ppb |
| 2018-11-16 | 1.38 ppb |
| 2018-11-16 | 1.37 ppb |
| 2018-11-16 | 1.49 ppb |
| 2018-11-16 | 1.46 ppb |
| 2019-02-19 | 1.39 ppb |
| 2019-02-19 | 1.49 ppb |
| 2019-02-19 | 1.46 ppb |
| 2019-02-19 | 1.47 ppb |
| 2019-02-19 | 1.43 ppb |
| 2019-02-19 | 1.49 ppb |
| 2019-02-20 | 1.22 ppb |
| 2019-02-20 | 1.64 ppb |
| 2019-02-20 | 1.38 ppb |
| 2019-02-20 | 1.71 ppb |
| 2019-02-20 | 1.18 ppb |
| 2019-02-20 | 1.32 ppb |
| 2019-02-20 | 1.32 ppb |
| 2019-02-20 | 1.61 ppb |
| 2019-02-20 | 1.76 ppb |
| 2019-02-21 | 1.10 ppb |
| 2019-02-21 | 1.22 ppb |
| 2019-02-21 | 1.47 ppb |
| 2019-02-21 | 1.52 ppb |
| 2019-02-21 | 1.65 ppb |
| 2019-02-21 | 1.67 ppb |
| 2019-02-21 | 1.62 ppb |
| 2019-02-21 | 1.39 ppb |
| 2019-02-22 | 1.64 ppb |
| 2019-02-22 | ND |
| 2019-02-22 | 1.44 ppb |
| 2019-02-22 | 1.70 ppb |
| 2019-02-22 | 1.60 ppb |
| 2019-02-22 | 1.48 ppb |
| 2019-02-22 | 1.66 ppb |
| 2019-02-22 | 1.73 ppb |
| 2019-02-22 | 1.66 ppb |
| 2019-05-20 | 2.05 ppb |
| 2019-05-20 | 1.90 ppb |
| 2019-05-20 | 2.31 ppb |
| 2019-05-20 | 2.80 ppb |
| 2019-05-20 | 2.72 ppb |
| 2019-05-20 | 2.74 ppb |
| 2019-05-20 | 2.59 ppb |
| 2019-05-20 | 2.43 ppb |
| 2019-05-20 | 2.22 ppb |
| 2019-05-20 | 3.03 ppb |
| 2019-05-21 | 1.97 ppb |
| 2019-05-21 | 1.29 ppb |
| 2019-05-21 | 2.09 ppb |
| 2019-05-21 | 2.10 ppb |
| 2019-05-22 | 2.23 ppb |
| 2019-05-22 | 2.16 ppb |
| 2019-05-23 | 2.67 ppb |
| 2019-05-23 | 2.53 ppb |
| 2019-05-23 | 2.58 ppb |
| 2019-05-23 | 2.34 ppb |
| 2019-05-23 | 2.17 ppb |
| 2019-05-23 | 2.18 ppb |
| 2019-05-23 | 2.21 ppb |
| 2019-05-23 | 2.65 ppb |
| 2019-05-23 | 2.31 ppb |
| 2019-05-23 | 2.33 ppb |
| 2019-05-23 | 2.27 ppb |
| 2019-05-23 | 1.65 ppb |
| 2019-05-23 | 2.30 ppb |
| 2019-05-23 | 2.42 ppb |
| 2019-05-23 | 2.45 ppb |
| 2019-05-24 | 2.66 ppb |
| 2019-05-24 | 1.73 ppb |
| 2019-05-24 | 2.23 ppb |
| 2019-08-19 | 2.14 ppb |
| 2019-08-19 | 1.94 ppb |
| 2019-08-19 | 2.36 ppb |
| 2019-08-19 | 2.04 ppb |
| 2019-08-19 | 2.05 ppb |
| 2019-08-19 | 2.26 ppb |
| 2019-08-20 | 2.39 ppb |
| 2019-08-20 | 2.23 ppb |
| 2019-08-20 | 2.15 ppb |
| 2019-08-20 | 2.22 ppb |
| 2019-08-20 | 2.37 ppb |
| 2019-08-20 | 2.21 ppb |
| 2019-08-20 | 2.07 ppb |
| 2019-08-20 | 2.24 ppb |
| 2019-08-20 | 2.15 ppb |
| 2019-08-22 | 1.96 ppb |
| 2019-08-22 | 2.12 ppb |
| 2019-08-22 | 2.34 ppb |
| 2019-08-22 | 2.01 ppb |
| 2019-08-22 | 2.29 ppb |
| 2019-08-22 | 1.92 ppb |
| 2019-08-22 | 2.00 ppb |
| 2019-08-23 | 1.94 ppb |
| 2019-08-23 | 1.77 ppb |
| 2019-08-23 | 1.90 ppb |
| 2019-08-23 | 2.17 ppb |
| 2019-08-23 | 1.94 ppb |
| 2019-08-23 | 1.91 ppb |
| 2019-08-23 | 2.04 ppb |
| 2019-08-23 | 1.93 ppb |
| 2019-09-25 | 1.88 ppb |
| 2019-09-25 | 2.19 ppb |
| 2019-09-25 | 2.10 ppb |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | ND |
| 2019-11-18 | 1.05 ppb |
| 2019-11-19 | ND |
| 2019-11-19 | ND |
| 2019-11-19 | ND |
| 2019-11-19 | ND |
| 2019-11-19 | ND |
| 2019-11-20 | 1.49 ppb |
| 2019-11-20 | ND |
| 2019-11-20 | ND |
| 2019-11-20 | ND |
| 2019-11-21 | ND |
| 2019-11-21 | ND |
| 2019-11-21 | ND |
| 2019-11-21 | 1.01 ppb |
| 2019-11-21 | ND |
| 2019-11-21 | 1.000 ppb |
| 2019-11-21 | 1.07 ppb |
| 2019-11-22 | ND |
| 2019-11-22 | ND |
| 2019-11-22 | ND |
| 2019-11-22 | ND |
| 2019-11-22 | ND |
| 2019-11-22 | ND |
| 2019-11-22 | ND |