Nitrate
Peabody Water Department (MWRA)
Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.
598
Samples
0
Samples exceeding legal limit (MCL)
227
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.207 ppm | 2 | 2 | 0.0600 ppm - 0.353 ppm |
| 2015 | 0.167 ppm | 123 | 122 | ND - 0.490 ppm |
| 2016 | 0.101 ppm | 114 | 113 | ND - 0.410 ppm |
| 2017 | 0.120 ppm | 115 | 115 | 0.0120 ppm - 0.380 ppm |
| 2018 | 0.119 ppm | 114 | 114 | 0.01000 ppm - 0.310 ppm |
| 2019 | 0.179 ppm | 130 | 130 | 0.0140 ppm - 0.370 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.
EPA Maximum Contaminant
Level (MCL) 10 ppm
The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.
ppm = parts per million
All test results
| Date | Result |
|---|---|
| 2014-01-30 | 0.0600 ppm |
| 2014-01-30 | 0.353 ppm |
| 2015-01-12 | ND |
| 2015-01-12 | 0.400 ppm |
| 2015-01-12 | 0.280 ppm |
| 2015-01-26 | 0.110 ppm |
| 2015-01-26 | 0.390 ppm |
| 2015-01-26 | 0.370 ppm |
| 2015-01-26 | 0.140 ppm |
| 2015-01-26 | 0.490 ppm |
| 2015-01-26 | 0.460 ppm |
| 2015-01-26 | 0.460 ppm |
| 2015-02-09 | 0.0580 ppm |
| 2015-02-09 | 0.440 ppm |
| 2015-02-09 | 0.280 ppm |
| 2015-02-09 | 0.440 ppm |
| 2015-02-18 | 0.430 ppm |
| 2015-02-18 | 0.330 ppm |
| 2015-02-18 | 0.0760 ppm |
| 2015-03-09 | 0.0990 ppm |
| 2015-03-09 | 0.410 ppm |
| 2015-03-09 | 0.390 ppm |
| 2015-03-09 | 0.0970 ppm |
| 2015-03-09 | 0.420 ppm |
| 2015-03-09 | 0.420 ppm |
| 2015-03-09 | 0.420 ppm |
| 2015-04-06 | 0.150 ppm |
| 2015-04-06 | 0.390 ppm |
| 2015-04-06 | 0.430 ppm |
| 2015-04-06 | 0.150 ppm |
| 2015-04-06 | 0.400 ppm |
| 2015-04-06 | 0.410 ppm |
| 2015-04-06 | 0.390 ppm |
| 2015-05-04 | 0.380 ppm |
| 2015-05-04 | 0.260 ppm |
| 2015-05-04 | 0.410 ppm |
| 2015-05-04 | 0.390 ppm |
| 2015-05-04 | 0.310 ppm |
| 2015-05-04 | 0.390 ppm |
| 2015-05-04 | 0.320 ppm |
| 2015-06-08 | 0.110 ppm |
| 2015-06-08 | 0.240 ppm |
| 2015-06-08 | 0.180 ppm |
| 2015-06-08 | 0.120 ppm |
| 2015-06-08 | 0.190 ppm |
| 2015-06-08 | 0.110 ppm |
| 2015-06-08 | 0.220 ppm |
| 2015-06-15 | 0.0840 ppm |
| 2015-06-15 | 0.150 ppm |
| 2015-06-15 | 0.200 ppm |
| 2015-06-15 | 0.0890 ppm |
| 2015-06-15 | 0.140 ppm |
| 2015-06-15 | 0.150 ppm |
| 2015-06-15 | 0.0990 ppm |
| 2015-06-29 | 0.130 ppm |
| 2015-06-29 | 0.150 ppm |
| 2015-06-29 | 0.160 ppm |
| 2015-06-29 | 0.130 ppm |
| 2015-06-29 | 0.110 ppm |
| 2015-06-29 | 0.170 ppm |
| 2015-06-29 | 0.120 ppm |
| 2015-07-13 | 0.110 ppm |
| 2015-07-13 | 0.0960 ppm |
| 2015-07-13 | 0.120 ppm |
| 2015-07-13 | 0.1000 ppm |
| 2015-07-13 | 0.0630 ppm |
| 2015-07-13 | 0.0710 ppm |
| 2015-07-13 | 0.0840 ppm |
| 2015-07-27 | 0.0640 ppm |
| 2015-07-27 | 0.0490 ppm |
| 2015-07-27 | 0.0570 ppm |
| 2015-07-27 | 0.0770 ppm |
| 2015-07-27 | 0.0660 ppm |
| 2015-07-27 | 0.0420 ppm |
| 2015-07-27 | 0.0810 ppm |
| 2015-07-27 | 0.0710 ppm |
| 2015-08-10 | 0.110 ppm |
| 2015-08-10 | 0.0310 ppm |
| 2015-08-10 | 0.160 ppm |
| 2015-08-10 | 0.1000 ppm |
| 2015-08-10 | 0.0160 ppm |
| 2015-08-10 | 0.1000 ppm |
| 2015-08-10 | 0.140 ppm |
| 2015-08-24 | 0.160 ppm |
| 2015-08-24 | 0.0150 ppm |
| 2015-08-24 | 0.0930 ppm |
| 2015-08-24 | 0.150 ppm |
| 2015-08-24 | 0.0160 ppm |
| 2015-08-24 | 0.110 ppm |
| 2015-08-24 | 0.180 ppm |
| 2015-09-08 | 0.0710 ppm |
| 2015-09-08 | 0.01000 ppm |
| 2015-09-08 | 0.110 ppm |
| 2015-09-08 | 0.110 ppm |
| 2015-09-08 | 0.0260 ppm |
| 2015-09-08 | 0.0890 ppm |
| 2015-09-08 | 0.0930 ppm |
| 2015-09-21 | 0.1000 ppm |
| 2015-09-21 | 0.01000 ppm |
| 2015-09-21 | 0.1000 ppm |
| 2015-09-21 | 0.120 ppm |
| 2015-09-21 | 0.0240 ppm |
| 2015-09-21 | 0.0760 ppm |
| 2015-09-21 | 0.0830 ppm |
| 2015-10-05 | 0.120 ppm |
| 2015-10-05 | 0.00750 ppm |
| 2015-10-05 | 0.190 ppm |
| 2015-10-05 | 0.140 ppm |
| 2015-10-05 | 0.0250 ppm |
| 2015-10-05 | 0.0820 ppm |
| 2015-10-05 | 0.140 ppm |
| 2015-11-02 | 0.0990 ppm |
| 2015-11-02 | 0.00900 ppm |
| 2015-11-02 | 0.170 ppm |
| 2015-11-02 | 0.0990 ppm |
| 2015-11-02 | 0.0150 ppm |
| 2015-11-02 | 0.0940 ppm |
| 2015-11-02 | 0.0790 ppm |
| 2015-12-07 | 0.1000 ppm |
| 2015-12-07 | 0.00840 ppm |
| 2015-12-07 | 0.130 ppm |
| 2015-12-07 | 0.1000 ppm |
| 2015-12-07 | 0.00880 ppm |
| 2015-12-07 | 0.110 ppm |
| 2015-12-07 | 0.0370 ppm |
| 2016-01-04 | 0.0540 ppm |
| 2016-01-04 | 0.0900 ppm |
| 2016-01-04 | 0.140 ppm |
| 2016-01-04 | 0.0980 ppm |
| 2016-01-04 | 0.130 ppm |
| 2016-01-04 | 0.160 ppm |
| 2016-01-04 | 0.120 ppm |
| 2016-01-25 | ND |
| 2016-01-25 | 0.190 ppm |
| 2016-01-25 | 0.160 ppm |
| 2016-02-22 | 0.0460 ppm |
| 2016-02-22 | 0.200 ppm |
| 2016-02-22 | 0.180 ppm |
| 2016-02-22 | 0.1000 ppm |
| 2016-02-22 | 0.270 ppm |
| 2016-02-22 | 0.220 ppm |
| 2016-02-22 | 0.190 ppm |
| 2016-03-07 | 0.130 ppm |
| 2016-03-07 | 0.180 ppm |
| 2016-03-07 | 0.200 ppm |
| 2016-03-07 | 0.130 ppm |
| 2016-03-07 | 0.190 ppm |
| 2016-03-07 | 0.230 ppm |
| 2016-03-07 | 0.190 ppm |
| 2016-04-04 | 0.140 ppm |
| 2016-04-04 | 0.160 ppm |
| 2016-04-04 | 0.170 ppm |
| 2016-04-04 | 0.150 ppm |
| 2016-04-04 | 0.150 ppm |
| 2016-04-04 | 0.160 ppm |
| 2016-04-04 | 0.150 ppm |
| 2016-05-02 | 0.1000 ppm |
| 2016-05-02 | 0.120 ppm |
| 2016-05-02 | 0.110 ppm |
| 2016-05-02 | 0.1000 ppm |
| 2016-05-02 | 0.110 ppm |
| 2016-05-02 | 0.1000 ppm |
| 2016-05-02 | 0.110 ppm |
| 2016-06-13 | 0.0580 ppm |
| 2016-06-13 | 0.0690 ppm |
| 2016-06-13 | 0.0700 ppm |
| 2016-06-13 | 0.0520 ppm |
| 2016-06-13 | 0.0720 ppm |
| 2016-06-13 | 0.0630 ppm |
| 2016-06-13 | 0.0580 ppm |
| 2016-06-27 | 0.0410 ppm |
| 2016-06-27 | 0.0710 ppm |
| 2016-06-27 | 0.0640 ppm |
| 2016-06-27 | 0.0360 ppm |
| 2016-06-27 | 0.0600 ppm |
| 2016-06-27 | 0.0520 ppm |
| 2016-06-27 | 0.0530 ppm |
| 2016-07-11 | 0.0340 ppm |
| 2016-07-11 | 0.0510 ppm |
| 2016-07-11 | 0.0460 ppm |
| 2016-07-11 | 0.0450 ppm |
| 2016-07-11 | 0.0540 ppm |
| 2016-07-11 | 0.0680 ppm |
| 2016-07-25 | 0.0320 ppm |
| 2016-07-25 | 0.0320 ppm |
| 2016-07-25 | 0.0520 ppm |
| 2016-07-25 | 0.0320 ppm |
| 2016-07-25 | 0.0230 ppm |
| 2016-07-25 | 0.0500 ppm |
| 2016-07-25 | 0.0610 ppm |
| 2016-08-08 | 0.110 ppm |
| 2016-08-08 | 0.0240 ppm |
| 2016-08-08 | 0.120 ppm |
| 2016-08-08 | 0.1000 ppm |
| 2016-08-08 | 0.0160 ppm |
| 2016-08-08 | 0.0580 ppm |
| 2016-08-08 | 0.0740 ppm |
| 2016-08-22 | 0.110 ppm |
| 2016-08-22 | 0.0140 ppm |
| 2016-08-22 | 0.160 ppm |
| 2016-08-22 | 0.110 ppm |
| 2016-08-22 | 0.0240 ppm |
| 2016-08-22 | 0.0500 ppm |
| 2016-08-22 | 0.160 ppm |
| 2016-09-12 | 0.0760 ppm |
| 2016-09-12 | 0.01000 ppm |
| 2016-09-12 | 0.180 ppm |
| 2016-09-12 | 0.0780 ppm |
| 2016-09-12 | 0.0310 ppm |
| 2016-09-12 | 0.0630 ppm |
| 2016-09-12 | 0.0670 ppm |
| 2016-09-26 | 0.0500 ppm |
| 2016-09-26 | 0.00620 ppm |
| 2016-09-26 | 0.220 ppm |
| 2016-09-26 | 0.0570 ppm |
| 2016-09-26 | 0.0330 ppm |
| 2016-09-26 | 0.0790 ppm |
| 2016-09-26 | 0.210 ppm |
| 2016-10-17 | 0.110 ppm |
| 2016-10-17 | 0.0150 ppm |
| 2016-10-17 | 0.410 ppm |
| 2016-10-17 | 0.110 ppm |
| 2016-10-17 | 0.0240 ppm |
| 2016-10-17 | 0.0980 ppm |
| 2016-10-17 | 0.140 ppm |
| 2016-11-07 | 0.140 ppm |
| 2016-11-07 | 0.0110 ppm |
| 2016-11-07 | 0.220 ppm |
| 2016-11-07 | 0.120 ppm |
| 2016-11-07 | 0.0150 ppm |
| 2016-11-07 | 0.170 ppm |
| 2016-11-07 | 0.1000 ppm |
| 2016-12-05 | 0.150 ppm |
| 2016-12-05 | 0.0140 ppm |
| 2016-12-05 | 0.210 ppm |
| 2016-12-05 | 0.150 ppm |
| 2016-12-05 | 0.0160 ppm |
| 2016-12-05 | 0.170 ppm |
| 2016-12-05 | 0.0300 ppm |
| 2017-01-09 | 0.0430 ppm |
| 2017-01-09 | 0.180 ppm |
| 2017-01-09 | 0.130 ppm |
| 2017-01-09 | 0.0730 ppm |
| 2017-01-09 | 0.240 ppm |
| 2017-01-09 | 0.130 ppm |
| 2017-01-09 | 0.190 ppm |
| 2017-01-30 | 0.0120 ppm |
| 2017-01-30 | 0.200 ppm |
| 2017-01-30 | 0.280 ppm |
| 2017-02-06 | 0.0390 ppm |
| 2017-02-06 | 0.270 ppm |
| 2017-02-06 | 0.160 ppm |
| 2017-02-06 | 0.0750 ppm |
| 2017-02-06 | 0.310 ppm |
| 2017-02-06 | 0.170 ppm |
| 2017-02-06 | 0.300 ppm |
| 2017-03-06 | 0.1000 ppm |
| 2017-03-06 | 0.310 ppm |
| 2017-03-06 | 0.230 ppm |
| 2017-03-06 | 0.1000 ppm |
| 2017-03-06 | 0.350 ppm |
| 2017-03-06 | 0.280 ppm |
| 2017-03-06 | 0.380 ppm |
| 2017-04-03 | 0.0420 ppm |
| 2017-04-03 | 0.320 ppm |
| 2017-04-03 | 0.140 ppm |
| 2017-04-03 | 0.0500 ppm |
| 2017-04-03 | 0.300 ppm |
| 2017-04-03 | 0.110 ppm |
| 2017-04-03 | 0.300 ppm |
| 2017-05-01 | 0.0900 ppm |
| 2017-05-01 | 0.270 ppm |
| 2017-05-01 | 0.190 ppm |
| 2017-05-01 | 0.0910 ppm |
| 2017-05-01 | 0.220 ppm |
| 2017-05-01 | 0.160 ppm |
| 2017-05-01 | 0.210 ppm |
| 2017-06-05 | 0.0650 ppm |
| 2017-06-05 | 0.130 ppm |
| 2017-06-05 | 0.110 ppm |
| 2017-06-05 | 0.0630 ppm |
| 2017-06-05 | 0.120 ppm |
| 2017-06-05 | 0.0850 ppm |
| 2017-06-05 | 0.110 ppm |
| 2017-06-19 | 0.0890 ppm |
| 2017-06-19 | 0.110 ppm |
| 2017-06-19 | 0.0810 ppm |
| 2017-06-19 | 0.0590 ppm |
| 2017-06-19 | 0.0680 ppm |
| 2017-06-19 | 0.0600 ppm |
| 2017-06-19 | 0.0920 ppm |
| 2017-07-05 | 0.0630 ppm |
| 2017-07-05 | 0.0800 ppm |
| 2017-07-05 | 0.0660 ppm |
| 2017-07-05 | 0.0630 ppm |
| 2017-07-05 | 0.0790 ppm |
| 2017-07-05 | 0.0660 ppm |
| 2017-07-05 | 0.0780 ppm |
| 2017-07-17 | 0.0660 ppm |
| 2017-07-17 | 0.0760 ppm |
| 2017-07-17 | 0.0720 ppm |
| 2017-07-17 | 0.0660 ppm |
| 2017-07-17 | 0.0630 ppm |
| 2017-07-17 | 0.0660 ppm |
| 2017-07-17 | 0.0620 ppm |
| 2017-08-07 | 0.130 ppm |
| 2017-08-07 | 0.0400 ppm |
| 2017-08-07 | 0.120 ppm |
| 2017-08-07 | 0.120 ppm |
| 2017-08-07 | 0.0210 ppm |
| 2017-08-07 | 0.0960 ppm |
| 2017-08-07 | 0.0220 ppm |
| 2017-08-21 | 0.0540 ppm |
| 2017-08-21 | 0.0220 ppm |
| 2017-08-21 | 0.150 ppm |
| 2017-08-21 | 0.150 ppm |
| 2017-08-21 | 0.0140 ppm |
| 2017-08-21 | 0.150 ppm |
| 2017-08-21 | 0.0310 ppm |
| 2017-09-11 | 0.140 ppm |
| 2017-09-11 | 0.0170 ppm |
| 2017-09-11 | 0.160 ppm |
| 2017-09-11 | 0.220 ppm |
| 2017-09-11 | 0.0140 ppm |
| 2017-09-11 | 0.170 ppm |
| 2017-09-11 | 0.0650 ppm |
| 2017-09-25 | 0.190 ppm |
| 2017-09-25 | 0.0170 ppm |
| 2017-09-25 | 0.300 ppm |
| 2017-09-25 | 0.200 ppm |
| 2017-09-25 | 0.0150 ppm |
| 2017-09-25 | 0.180 ppm |
| 2017-09-25 | 0.0740 ppm |
| 2017-10-16 | 0.180 ppm |
| 2017-10-16 | 0.0180 ppm |
| 2017-10-16 | 0.300 ppm |
| 2017-10-16 | 0.190 ppm |
| 2017-10-16 | 0.0130 ppm |
| 2017-10-16 | 0.0620 ppm |
| 2017-10-16 | 0.110 ppm |
| 2017-11-06 | 0.0350 ppm |
| 2017-11-06 | 0.140 ppm |
| 2017-11-06 | 0.0230 ppm |
| 2017-11-06 | 0.0990 ppm |
| 2017-11-06 | 0.0250 ppm |
| 2017-11-06 | 0.0440 ppm |
| 2017-11-06 | 0.0280 ppm |
| 2017-12-04 | 0.0890 ppm |
| 2017-12-04 | 0.0180 ppm |
| 2017-12-04 | 0.110 ppm |
| 2017-12-04 | 0.0880 ppm |
| 2017-12-04 | 0.0140 ppm |
| 2017-12-04 | 0.0520 ppm |
| 2017-12-04 | 0.0450 ppm |
| 2018-01-08 | 0.0580 ppm |
| 2018-01-08 | 0.280 ppm |
| 2018-01-08 | 0.0900 ppm |
| 2018-01-08 | 0.0620 ppm |
| 2018-01-08 | 0.310 ppm |
| 2018-01-08 | 0.0600 ppm |
| 2018-01-08 | 0.180 ppm |
| 2018-02-05 | 0.0580 ppm |
| 2018-02-05 | 0.0870 ppm |
| 2018-02-05 | 0.280 ppm |
| 2018-02-05 | 0.270 ppm |
| 2018-02-05 | 0.1000 ppm |
| 2018-02-05 | 0.0590 ppm |
| 2018-02-05 | 0.280 ppm |
| 2018-02-05 | 0.0570 ppm |
| 2018-02-05 | 0.170 ppm |
| 2018-03-05 | 0.0740 ppm |
| 2018-03-05 | 0.210 ppm |
| 2018-03-05 | 0.150 ppm |
| 2018-03-05 | 0.0760 ppm |
| 2018-03-05 | 0.240 ppm |
| 2018-03-05 | 0.0700 ppm |
| 2018-03-05 | 0.210 ppm |
| 2018-04-02 | 0.0920 ppm |
| 2018-04-02 | 0.200 ppm |
| 2018-04-02 | 0.120 ppm |
| 2018-04-02 | 0.0920 ppm |
| 2018-04-02 | 0.180 ppm |
| 2018-04-02 | 0.0910 ppm |
| 2018-04-02 | 0.130 ppm |
| 2018-05-07 | 0.1000 ppm |
| 2018-05-07 | 0.160 ppm |
| 2018-05-07 | 0.120 ppm |
| 2018-05-07 | 0.1000 ppm |
| 2018-05-07 | 0.140 ppm |
| 2018-05-07 | 0.1000 ppm |
| 2018-05-07 | 0.140 ppm |
| 2018-06-04 | 0.110 ppm |
| 2018-06-04 | 0.140 ppm |
| 2018-06-04 | 0.110 ppm |
| 2018-06-04 | 0.110 ppm |
| 2018-06-04 | 0.130 ppm |
| 2018-06-04 | 0.1000 ppm |
| 2018-06-04 | 0.130 ppm |
| 2018-06-18 | 0.0960 ppm |
| 2018-06-18 | 0.110 ppm |
| 2018-06-18 | 0.0960 ppm |
| 2018-06-18 | 0.0950 ppm |
| 2018-06-18 | 0.0890 ppm |
| 2018-06-18 | 0.0960 ppm |
| 2018-06-18 | 0.1000 ppm |
| 2018-07-02 | 0.0910 ppm |
| 2018-07-02 | 0.0780 ppm |
| 2018-07-02 | 0.0820 ppm |
| 2018-07-02 | 0.0930 ppm |
| 2018-07-02 | 0.0540 ppm |
| 2018-07-02 | 0.0790 ppm |
| 2018-07-02 | 0.0780 ppm |
| 2018-07-16 | 0.0700 ppm |
| 2018-07-16 | 0.0480 ppm |
| 2018-07-16 | 0.0750 ppm |
| 2018-07-16 | 0.0830 ppm |
| 2018-07-16 | 0.0270 ppm |
| 2018-07-16 | 0.0670 ppm |
| 2018-07-16 | 0.0590 ppm |
| 2018-08-06 | 0.130 ppm |
| 2018-08-06 | 0.110 ppm |
| 2018-08-06 | 0.150 ppm |
| 2018-08-06 | 0.130 ppm |
| 2018-08-06 | 0.0230 ppm |
| 2018-08-06 | 0.0750 ppm |
| 2018-08-06 | 0.0640 ppm |
| 2018-08-20 | 0.0940 ppm |
| 2018-08-20 | 0.190 ppm |
| 2018-08-20 | 0.0770 ppm |
| 2018-08-20 | 0.1000 ppm |
| 2018-08-20 | 0.0370 ppm |
| 2018-08-20 | 0.0760 ppm |
| 2018-08-20 | 0.170 ppm |
| 2018-09-10 | 0.0920 ppm |
| 2018-09-10 | 0.150 ppm |
| 2018-09-10 | 0.110 ppm |
| 2018-09-10 | 0.1000 ppm |
| 2018-09-10 | 0.01000 ppm |
| 2018-09-10 | 0.0470 ppm |
| 2018-09-10 | 0.140 ppm |
| 2018-09-24 | 0.0780 ppm |
| 2018-09-24 | 0.0630 ppm |
| 2018-09-24 | 0.110 ppm |
| 2018-09-24 | 0.0810 ppm |
| 2018-09-24 | 0.0180 ppm |
| 2018-09-24 | 0.0420 ppm |
| 2018-09-24 | 0.0200 ppm |
| 2018-10-15 | 0.0770 ppm |
| 2018-10-15 | 0.220 ppm |
| 2018-10-15 | 0.170 ppm |
| 2018-10-15 | 0.190 ppm |
| 2018-10-15 | 0.0340 ppm |
| 2018-10-15 | 0.0920 ppm |
| 2018-10-15 | 0.230 ppm |
| 2018-11-05 | 0.290 ppm |
| 2018-11-05 | 0.260 ppm |
| 2018-11-05 | 0.280 ppm |
| 2018-11-05 | 0.310 ppm |
| 2018-11-05 | 0.0630 ppm |
| 2018-11-05 | 0.0820 ppm |
| 2018-11-05 | 0.1000 ppm |
| 2018-12-03 | 0.190 ppm |
| 2018-12-03 | 0.190 ppm |
| 2018-12-03 | 0.150 ppm |
| 2018-12-03 | 0.210 ppm |
| 2018-12-03 | 0.0720 ppm |
| 2018-12-03 | 0.140 ppm |
| 2018-12-03 | 0.0700 ppm |
| 2019-01-07 | 0.130 ppm |
| 2019-01-07 | 0.160 ppm |
| 2019-01-07 | 0.200 ppm |
| 2019-01-07 | 0.170 ppm |
| 2019-01-07 | 0.200 ppm |
| 2019-01-07 | 0.200 ppm |
| 2019-01-07 | 0.180 ppm |
| 2019-02-11 | 0.210 ppm |
| 2019-02-11 | 0.300 ppm |
| 2019-02-11 | 0.300 ppm |
| 2019-02-11 | 0.210 ppm |
| 2019-02-11 | 0.300 ppm |
| 2019-02-11 | 0.240 ppm |
| 2019-02-11 | 0.300 ppm |
| 2019-02-21 | 0.310 ppm |
| 2019-02-21 | 0.360 ppm |
| 2019-03-07 | 0.370 ppm |
| 2019-03-11 | 0.200 ppm |
| 2019-03-11 | 0.300 ppm |
| 2019-03-11 | 0.300 ppm |
| 2019-03-11 | 0.220 ppm |
| 2019-03-11 | 0.280 ppm |
| 2019-03-11 | 0.280 ppm |
| 2019-03-11 | 0.290 ppm |
| 2019-04-01 | 0.180 ppm |
| 2019-04-01 | 0.290 ppm |
| 2019-04-01 | 0.300 ppm |
| 2019-04-01 | 0.220 ppm |
| 2019-04-01 | 0.170 ppm |
| 2019-04-01 | 0.290 ppm |
| 2019-04-01 | 0.270 ppm |
| 2019-04-01 | 0.280 ppm |
| 2019-04-24 | 0.190 ppm |
| 2019-05-06 | 0.300 ppm |
| 2019-05-06 | 0.180 ppm |
| 2019-05-06 | 0.220 ppm |
| 2019-05-06 | 0.290 ppm |
| 2019-05-06 | 0.250 ppm |
| 2019-05-06 | 0.250 ppm |
| 2019-05-06 | 0.190 ppm |
| 2019-05-06 | 0.290 ppm |
| 2019-05-06 | 0.200 ppm |
| 2019-06-03 | 0.250 ppm |
| 2019-06-03 | 0.180 ppm |
| 2019-06-03 | 0.250 ppm |
| 2019-06-03 | 0.260 ppm |
| 2019-06-03 | 0.260 ppm |
| 2019-06-03 | 0.170 ppm |
| 2019-06-03 | 0.200 ppm |
| 2019-06-03 | 0.170 ppm |
| 2019-06-17 | 0.220 ppm |
| 2019-06-17 | 0.180 ppm |
| 2019-06-17 | 0.230 ppm |
| 2019-06-17 | 0.220 ppm |
| 2019-06-17 | 0.210 ppm |
| 2019-06-17 | 0.160 ppm |
| 2019-06-17 | 0.190 ppm |
| 2019-06-17 | 0.160 ppm |
| 2019-07-01 | 0.170 ppm |
| 2019-07-01 | 0.150 ppm |
| 2019-07-01 | 0.180 ppm |
| 2019-07-01 | 0.180 ppm |
| 2019-07-01 | 0.140 ppm |
| 2019-07-01 | 0.130 ppm |
| 2019-07-01 | 0.140 ppm |
| 2019-07-01 | 0.130 ppm |
| 2019-07-15 | 0.0960 ppm |
| 2019-07-15 | 0.0980 ppm |
| 2019-07-15 | 0.110 ppm |
| 2019-07-15 | 0.120 ppm |
| 2019-07-15 | 0.110 ppm |
| 2019-07-15 | 0.0800 ppm |
| 2019-07-15 | 0.1000 ppm |
| 2019-07-15 | 0.0970 ppm |
| 2019-08-05 | 0.120 ppm |
| 2019-08-05 | 0.0780 ppm |
| 2019-08-05 | 0.110 ppm |
| 2019-08-05 | 0.140 ppm |
| 2019-08-05 | 0.110 ppm |
| 2019-08-05 | 0.0320 ppm |
| 2019-08-05 | 0.0710 ppm |
| 2019-08-05 | 0.0340 ppm |
| 2019-08-19 | 0.190 ppm |
| 2019-08-19 | 0.220 ppm |
| 2019-08-19 | 0.130 ppm |
| 2019-08-19 | 0.220 ppm |
| 2019-08-19 | 0.110 ppm |
| 2019-08-19 | 0.0420 ppm |
| 2019-08-19 | 0.160 ppm |
| 2019-08-19 | 0.0920 ppm |
| 2019-09-09 | 0.240 ppm |
| 2019-09-09 | 0.190 ppm |
| 2019-09-09 | 0.350 ppm |
| 2019-09-09 | 0.260 ppm |
| 2019-09-09 | 0.0740 ppm |
| 2019-09-09 | 0.0140 ppm |
| 2019-09-09 | 0.0620 ppm |
| 2019-09-09 | 0.260 ppm |
| 2019-09-23 | 0.200 ppm |
| 2019-09-23 | 0.140 ppm |
| 2019-09-23 | 0.300 ppm |
| 2019-09-23 | 0.200 ppm |
| 2019-09-23 | 0.0550 ppm |
| 2019-09-23 | 0.0920 ppm |
| 2019-09-23 | 0.190 ppm |
| 2019-09-23 | 0.180 ppm |
| 2019-10-07 | 0.0880 ppm |
| 2019-10-07 | 0.210 ppm |
| 2019-10-07 | 0.280 ppm |
| 2019-10-07 | 0.260 ppm |
| 2019-10-07 | 0.0860 ppm |
| 2019-10-07 | 0.0940 ppm |
| 2019-10-07 | 0.150 ppm |
| 2019-10-07 | 0.0230 ppm |
| 2019-11-04 | 0.130 ppm |
| 2019-11-04 | 0.210 ppm |
| 2019-11-04 | 0.150 ppm |
| 2019-11-04 | 0.130 ppm |
| 2019-11-04 | 0.0760 ppm |
| 2019-11-04 | 0.130 ppm |
| 2019-11-04 | 0.0940 ppm |
| 2019-11-04 | 0.0190 ppm |
| 2019-12-09 | 0.0660 ppm |
| 2019-12-09 | 0.0620 ppm |
| 2019-12-09 | 0.160 ppm |
| 2019-12-09 | 0.140 ppm |
| 2019-12-09 | 0.110 ppm |
| 2019-12-09 | 0.0600 ppm |
| 2019-12-09 | 0.1000 ppm |
| 2019-12-09 | 0.0590 ppm |