Fluoride
San Juan Basin Authority
Fluoride occurs naturally in surface and groundwater and is also added to drinking water by many water systems. Read More.
Fluoride has been promoted as a chemical that reduces dental cavities. Yet it is now well-established that fluoride primarily exerts its protective effects through topical mechanisms, such as sodium fluoride in toothpaste and mouthwash. In contrast, long-term ingestion of fluoride in water increases dental fluorosis, which includes mottling, pitting and weakening of the teeth. EPA's maximum legal limit is set at 4 parts per million (ppm) to prevent skeletal fluorosis, a condition where bones become brittle and more susceptible to fractures, although these effects may occur at lower doses.
Even fluoride levels of 0.7 ppm, the amount of fluoride in drinking water recommended by the U.S. Public Health Service, can result in too much fluoride for bottle-fed babies. EWG recommends that caregivers mix baby formula with fluoride-free water. The National Toxicology Program is investigating the potential for low doses of fluoride to alter thyroid function and childhood brain development.
412
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.347 ppm | 101 | 97 | ND - 0.530 ppm |
| 2015 | 0.299 ppm | 65 | 59 | ND - 0.540 ppm |
| 2016 | 0.296 ppm | 43 | 37 | ND - 0.540 ppm |
| 2017 | 0.287 ppm | 52 | 46 | ND - 0.450 ppm |
| 2018 | 0.287 ppm | 75 | 64 | ND - 0.480 ppm |
| 2019 | 0.328 ppm | 76 | 66 | ND - 0.752 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 4 ppm
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-07 | 9590-001-1045 | 0.260 ppm |
| 2014-01-07 | 9590-002-1000 | 0.360 ppm |
| 2014-01-07 | 9590-003-0938 | 0.440 ppm |
| 2014-01-07 | 9590-004-1030 | 0.250 ppm |
| 2014-01-07 | 9590-014-1130 | 0.380 ppm |
| 2014-01-07 | 9590-015-1155 | 0.530 ppm |
| 2014-01-14 | 9590-010-0849 | ND |
| 2014-01-22 | 9590-005-1030 | 0.470 ppm |
| 2014-01-22 | 9590-006-1145 | 0.460 ppm |
| 2014-02-04 | 9590-001-1040 | 0.260 ppm |
| 2014-02-04 | 9590-003-1218 | 0.430 ppm |
| 2014-02-04 | 9590-004-1239 | 0.240 ppm |
| 2014-02-04 | 9590-005-0959 | 0.390 ppm |
| 2014-02-04 | 9590-014-1314 | 0.380 ppm |
| 2014-02-04 | 9590-015-1339 | 0.470 ppm |
| 2014-02-11 | 9590-002-0945 | 0.370 ppm |
| 2014-02-11 | 9590-006-0839 | 0.480 ppm |
| 2014-02-11 | 9590-010-1058 | 0.160 ppm |
| 2014-03-04 | 9590-001-0940 | 0.250 ppm |
| 2014-03-04 | 9590-002-1015 | 0.350 ppm |
| 2014-03-04 | 9590-003-1039 | 0.410 ppm |
| 2014-03-04 | 9590-004-1105 | 0.240 ppm |
| 2014-03-04 | 9590-005-1120 | 0.470 ppm |
| 2014-03-04 | 9590-006-0830 | 0.460 ppm |
| 2014-03-04 | 9590-014-0905 | 0.390 ppm |
| 2014-03-04 | 9590-015-0750 | 0.470 ppm |
| 2014-03-13 | 9590-010-0809 | ND |
| 2014-04-08 | 9590-001-0954 | 0.250 ppm |
| 2014-04-08 | 9590-002-1018 | 0.350 ppm |
| 2014-04-08 | 9590-003-1039 | 0.440 ppm |
| 2014-04-08 | 9590-004-1105 | 0.250 ppm |
| 2014-04-08 | 9590-005-1115 | 0.480 ppm |
| 2014-04-08 | 9590-006-0913 | 0.460 ppm |
| 2014-04-08 | 9590-014-0842 | 0.400 ppm |
| 2014-04-08 | 9590-015-0758 | 0.460 ppm |
| 2014-04-15 | 9590-010-1134 | 0.130 ppm |
| 2014-05-06 | 9590-001-1008 | 0.260 ppm |
| 2014-05-06 | 9590-002-1046 | 0.360 ppm |
| 2014-05-06 | 9590-003-1116 | 0.440 ppm |
| 2014-05-06 | 9590-004-1020 | 0.250 ppm |
| 2014-05-06 | 9590-005-1130 | 0.460 ppm |
| 2014-05-06 | 9590-006-0930 | 0.450 ppm |
| 2014-05-06 | 9590-010-1340 | 0.130 ppm |
| 2014-05-06 | 9590-014-0844 | 0.400 ppm |
| 2014-05-06 | 9590-015-0758 | 0.470 ppm |
| 2014-05-13 | 9590-010-1125 | 0.110 ppm |
| 2014-06-03 | 9590-001-0942 | 0.270 ppm |
| 2014-06-03 | 9590-002-1038 | 0.380 ppm |
| 2014-06-03 | 9590-003-1010 | 0.450 ppm |
| 2014-06-03 | 9590-004-1109 | 0.260 ppm |
| 2014-06-03 | 9590-005-1125 | 0.480 ppm |
| 2014-06-03 | 9590-006-0900 | 0.450 ppm |
| 2014-06-03 | 9590-014-0820 | 0.410 ppm |
| 2014-06-03 | 9590-015-0750 | 0.470 ppm |
| 2014-06-10 | 9590-010-1058 | ND |
| 2014-07-08 | 9590-002-0950 | 0.370 ppm |
| 2014-07-08 | 9590-003-0915 | 0.440 ppm |
| 2014-07-08 | 9590-004-1020 | 0.250 ppm |
| 2014-07-08 | 9590-005-1050 | 0.470 ppm |
| 2014-07-08 | 9590-014-0825 | 0.410 ppm |
| 2014-07-08 | 9590-015-0738 | 0.470 ppm |
| 2014-07-15 | 9590-006-0756 | 0.460 ppm |
| 2014-07-15 | 9590-010-1322 | 0.130 ppm |
| 2014-08-05 | 9590-003-1000 | 0.420 ppm |
| 2014-08-05 | 9590-004-1035 | 0.240 ppm |
| 2014-08-05 | 9590-005-1105 | 0.450 ppm |
| 2014-08-05 | 9590-006-0920 | 0.420 ppm |
| 2014-08-05 | 9590-014-0835 | 0.390 ppm |
| 2014-08-05 | 9590-015-0750 | 0.450 ppm |
| 2014-08-12 | 9590-010-1005 | 0.170 ppm |
| 2014-09-03 | 9590-001-1300 | 0.290 ppm |
| 2014-09-03 | 9590-003-1338 | 0.430 ppm |
| 2014-09-03 | 9590-004-1354 | 0.240 ppm |
| 2014-09-03 | 9590-005-1222 | 0.460 ppm |
| 2014-09-03 | 9590-006-1431 | 0.430 ppm |
| 2014-09-03 | 9590-014-1450 | 0.410 ppm |
| 2014-09-03 | 9590-015-1515 | 0.470 ppm |
| 2014-09-09 | 9590-010-1045 | 0.150 ppm |
| 2014-09-23 | 9590-002-1315 | 0.380 ppm |
| 2014-10-07 | 9590-001-0945 | 0.250 ppm |
| 2014-10-07 | 9590-002-1015 | 0.350 ppm |
| 2014-10-07 | 9590-004-1045 | 0.240 ppm |
| 2014-10-07 | 9590-005-1130 | 0.480 ppm |
| 2014-10-07 | 9590-006-0830 | 0.450 ppm |
| 2014-10-14 | 9590-010-0930 | ND |
| 2014-11-04 | 9590-001-0835 | 0.250 ppm |
| 2014-11-04 | 9590-002-0908 | 0.360 ppm |
| 2014-11-04 | 9590-004-0926 | 0.250 ppm |
| 2014-11-04 | 9590-005-1100 | 0.460 ppm |
| 2014-11-04 | 9590-006-1028 | 0.430 ppm |
| 2014-11-11 | 9590-010-0748 | 0.130 ppm |
| 2014-11-25 | 9590-003-0909 | 0.410 ppm |
| 2014-11-25 | 9590-014-0838 | 0.400 ppm |
| 2014-11-25 | 9590-015-0750 | 0.420 ppm |
| 2014-12-02 | 9590-001-1115 | 0.250 ppm |
| 2014-12-02 | 9590-002-1140 | 0.350 ppm |
| 2014-12-02 | 9590-003-1205 | 0.410 ppm |
| 2014-12-02 | 9590-004-1221 | 0.230 ppm |
| 2014-12-02 | 9590-005-1400 | 0.450 ppm |
| 2014-12-02 | 9590-006-1039 | 0.430 ppm |
| 2014-12-09 | 9590-010-1033 | 0.110 ppm |
| 2015-01-07 | 9590-001-0810 | 0.230 ppm |
| 2015-01-07 | 9590-002-0825 | 0.330 ppm |
| 2015-01-07 | 9590-003-0842 | 0.400 ppm |
| 2015-01-07 | 9590-004-0903 | 0.230 ppm |
| 2015-01-07 | 9590-005-0948 | 0.410 ppm |
| 2015-01-07 | 9590-006-0735 | 0.410 ppm |
| 2015-01-13 | 9590-010-1050 | 0.140 ppm |
| 2015-02-03 | 9590-002-0940 | 0.320 ppm |
| 2015-02-03 | 9590-003-1025 | 0.390 ppm |
| 2015-02-03 | 9590-004-1044 | 0.220 ppm |
| 2015-02-03 | 9590-005-1120 | 0.430 ppm |
| 2015-02-03 | 9590-006-0900 | 0.410 ppm |
| 2015-02-10 | 9590-010-1300 | 0.120 ppm |
| 2015-03-03 | 9590-002-1018 | 0.340 ppm |
| 2015-03-03 | 9590-003-1042 | 0.400 ppm |
| 2015-03-03 | 9590-004-1109 | 0.230 ppm |
| 2015-03-03 | 9590-005-1130 | 0.430 ppm |
| 2015-03-03 | 9590-006-0930 | 0.430 ppm |
| 2015-03-10 | 9590-010-1115 | 0.110 ppm |
| 2015-04-07 | 9590-001-1208 | 0.250 ppm |
| 2015-04-07 | 9590-002-1230 | 0.360 ppm |
| 2015-04-07 | 9590-003-1247 | 0.430 ppm |
| 2015-04-07 | 9590-004-1308 | 0.240 ppm |
| 2015-04-07 | 9590-005-1130 | 0.460 ppm |
| 2015-04-07 | 9590-006-1330 | 0.450 ppm |
| 2015-04-14 | 9590-010-1130 | 0.120 ppm |
| 2015-05-05 | 9590-002-0850 | 0.350 ppm |
| 2015-05-05 | 9590-003-0910 | 0.440 ppm |
| 2015-05-05 | 9590-004-0926 | 0.250 ppm |
| 2015-05-13 | 9590-010-1044 | ND |
| 2015-06-02 | 9590-002-0940 | 0.350 ppm |
| 2015-06-02 | 9590-003-0918 | 0.410 ppm |
| 2015-06-02 | 9590-004-1008 | 0.240 ppm |
| 2015-06-02 | 9590-006-0858 | 0.430 ppm |
| 2015-06-09 | 9590-010-0905 | 0.140 ppm |
| 2015-08-12 | 9590-010-0916 | 0.140 ppm |
| 2015-08-24 | 9590-002-1308 | 0.340 ppm |
| 2015-08-24 | 9590-003-1313 | 0.440 ppm |
| 2015-08-24 | 9590-004-1319 | 0.230 ppm |
| 2015-08-24 | 9590-010-1230 | ND |
| 2015-08-25 | 9590-001-0816 | 0.250 ppm |
| 2015-08-25 | 9590-005-0833 | 0.450 ppm |
| 2015-08-25 | 9590-006-0805 | 0.450 ppm |
| 2015-08-25 | 9590-014-0755 | 0.340 ppm |
| 2015-08-25 | 9590-015-0708 | 0.500 ppm |
| 2015-09-08 | 9590-002-0840 | 0.370 ppm |
| 2015-09-08 | 9590-003-0910 | 0.440 ppm |
| 2015-09-08 | 9590-004-0938 | 0.250 ppm |
| 2015-09-15 | 9590-010-0915 | ND |
| 2015-10-06 | 9590-002-0847 | 0.340 ppm |
| 2015-10-06 | 9590-003-0913 | 0.420 ppm |
| 2015-10-06 | 9590-004-0939 | 0.220 ppm |
| 2015-10-13 | 9590-010-1220 | ND |
| 2015-11-09 | 9590-010-0945 | 0.200 ppm |
| 2015-11-10 | 9590-010-0843 | ND |
| 2015-11-30 | 9590-002-1118 | 0.330 ppm |
| 2015-11-30 | 9590-003-1130 | 0.420 ppm |
| 2015-11-30 | 9590-004-1141 | 0.230 ppm |
| 2015-12-15 | 9590-010-1038 | ND |
| 2015-12-22 | 9590-001-1135 | 0.270 ppm |
| 2015-12-22 | 9590-002-1041 | 0.350 ppm |
| 2015-12-22 | 9590-003-1046 | 0.420 ppm |
| 2015-12-22 | 9590-004-1055 | 0.240 ppm |
| 2015-12-22 | 9590-014-1149 | 0.340 ppm |
| 2015-12-22 | 9590-015-1300 | 0.540 ppm |
| 2016-01-11 | 9590-010-0855 | ND |
| 2016-01-19 | 9590-001-1020 | 0.270 ppm |
| 2016-01-19 | 9590-002-1046 | 0.360 ppm |
| 2016-01-19 | 9590-003-1056 | 0.430 ppm |
| 2016-01-19 | 9590-004-1105 | 0.250 ppm |
| 2016-01-19 | 9590-006-0825 | 0.460 ppm |
| 2016-02-01 | 9590-010-1121 | 0.160 ppm |
| 2016-02-08 | 9590-001-1000 | 0.280 ppm |
| 2016-02-08 | 9590-002-1027 | 0.350 ppm |
| 2016-02-08 | 9590-003-1040 | 0.440 ppm |
| 2016-02-08 | 9590-004-1052 | 0.260 ppm |
| 2016-02-08 | 9590-005-1110 | 0.460 ppm |
| 2016-02-08 | 9590-006-0840 | 0.440 ppm |
| 2016-02-08 | 9590-014-0852 | 0.380 ppm |
| 2016-02-08 | 9590-015-0909 | 0.540 ppm |
| 2016-02-15 | 9590-010-0910 | 0.140 ppm |
| 2016-03-07 | 9590-001-0815 | 0.240 ppm |
| 2016-03-07 | 9590-002-0830 | 0.320 ppm |
| 2016-03-07 | 9590-003-0841 | 0.400 ppm |
| 2016-03-07 | 9590-004-0853 | 0.220 ppm |
| 2016-03-21 | 9590-010-0855 | ND |
| 2016-04-04 | 9590-001-0815 | 0.240 ppm |
| 2016-04-04 | 9590-002-1110 | 0.330 ppm |
| 2016-04-04 | 9590-003-1120 | 0.380 ppm |
| 2016-04-04 | 9590-004-1130 | 0.220 ppm |
| 2016-04-04 | 9590-005-1058 | 0.400 ppm |
| 2016-04-11 | 9590-010-0850 | ND |
| 2016-05-09 | 9590-010-0947 | ND |
| 2016-05-17 | 9590-001-0928 | 0.270 ppm |
| 2016-05-17 | 9590-002-0822 | 0.360 ppm |
| 2016-05-17 | 9590-003-0845 | 0.450 ppm |
| 2016-05-17 | 9590-004-0911 | 0.260 ppm |
| 2016-05-17 | 9590-005-1010 | 0.440 ppm |
| 2016-05-17 | 9590-015-0745 | 0.510 ppm |
| 2016-07-05 | 9590-002-0943 | 0.350 ppm |
| 2016-07-05 | 9590-003-1002 | 0.410 ppm |
| 2016-07-05 | 9590-004-1020 | 0.230 ppm |
| 2016-07-05 | 9590-015-1045 | 0.420 ppm |
| 2016-07-12 | 9590-010-0840 | ND |
| 2016-08-01 | 9590-002-0836 | 0.380 ppm |
| 2016-08-01 | 9590-003-0906 | 0.430 ppm |
| 2016-08-01 | 9590-004-0945 | 0.230 ppm |
| 2016-08-08 | 9590-010-0824 | ND |
| 2017-02-09 | 9590-002-0850 | 0.370 ppm |
| 2017-02-09 | 9590-003-0930 | 0.430 ppm |
| 2017-02-09 | 9590-004-1000 | 0.250 ppm |
| 2017-02-18 | 9590-010-1210 | ND |
| 2017-03-06 | 9590-002-0840 | 0.380 ppm |
| 2017-03-06 | 9590-003-0907 | 0.450 ppm |
| 2017-03-06 | 9590-004-0932 | 0.270 ppm |
| 2017-03-13 | 9590-010-1045 | ND |
| 2017-04-03 | 9590-002-0840 | 0.380 ppm |
| 2017-04-03 | 9590-003-0900 | 0.450 ppm |
| 2017-04-03 | 9590-004-0927 | 0.260 ppm |
| 2017-04-10 | 9590-010-1000 | ND |
| 2017-05-01 | 9590-002-0820 | 0.390 ppm |
| 2017-05-01 | 9590-003-0840 | 0.450 ppm |
| 2017-05-01 | 9590-004-0905 | 0.270 ppm |
| 2017-05-09 | 9590-010-0735 | ND |
| 2017-05-12 | 9590-010-1010 | ND |
| 2017-07-05 | 9590-002-0820 | 0.360 ppm |
| 2017-07-05 | 9590-003-0847 | 0.430 ppm |
| 2017-07-05 | 9590-004-0911 | 0.260 ppm |
| 2017-07-10 | 9590-010-1015 | 0.110 ppm |
| 2017-08-03 | 9590-001-1423 | 0.270 ppm |
| 2017-08-03 | 9590-005-1323 | 0.450 ppm |
| 2017-08-08 | 9590-001-0820 | 0.260 ppm |
| 2017-08-08 | 9590-002-0910 | 0.350 ppm |
| 2017-08-08 | 9590-003-1012 | 0.410 ppm |
| 2017-08-08 | 9590-005-1105 | 0.430 ppm |
| 2017-08-15 | 9590-010-1125 | 0.110 ppm |
| 2017-09-05 | 9590-001-0840 | 0.250 ppm |
| 2017-09-05 | 9590-002-0910 | 0.330 ppm |
| 2017-09-05 | 9590-003-0958 | 0.410 ppm |
| 2017-09-05 | 9590-005-1056 | 0.430 ppm |
| 2017-09-11 | 9590-010-1015 | ND |
| 2017-09-28 | 9590-004-0915 | 0.250 ppm |
| 2017-10-02 | 9590-010-1200 | 0.120 ppm |
| 2017-10-09 | 9590-001-0910 | 0.260 ppm |
| 2017-10-09 | 9590-002-1000 | 0.340 ppm |
| 2017-10-09 | 9590-003-1032 | 0.420 ppm |
| 2017-10-09 | 9590-004-1055 | 0.250 ppm |
| 2017-10-09 | 9590-005-1140 | 0.430 ppm |
| 2017-11-06 | 9590-001-0915 | 0.270 ppm |
| 2017-11-06 | 9590-002-1000 | 0.360 ppm |
| 2017-11-06 | 9590-003-1045 | 0.420 ppm |
| 2017-11-06 | 9590-004-1125 | 0.260 ppm |
| 2017-11-06 | 9590-005-1210 | 0.430 ppm |
| 2017-11-06 | 9590-010-1145 | 0.130 ppm |
| 2017-12-04 | 9590-001-1315 | 0.250 ppm |
| 2017-12-04 | 9590-002-1358 | 0.320 ppm |
| 2017-12-04 | 9590-003-1435 | 0.390 ppm |
| 2017-12-04 | 9590-004-1505 | 0.220 ppm |
| 2017-12-04 | 9590-005-1150 | 0.450 ppm |
| 2017-12-11 | 9590-010-1020 | 0.130 ppm |
| 2018-01-03 | 9590-001-0754 | 0.240 ppm |
| 2018-01-03 | 9590-002-0827 | 0.320 ppm |
| 2018-01-03 | 9590-003-0858 | 0.380 ppm |
| 2018-01-03 | 9590-004-0926 | 0.220 ppm |
| 2018-01-03 | 9590-005-1034 | 0.400 ppm |
| 2018-01-08 | 9590-010-1250 | ND |
| 2018-02-05 | 9590-001-0925 | 0.250 ppm |
| 2018-02-05 | 9590-002-0959 | 0.360 ppm |
| 2018-02-05 | 9590-003-1040 | 0.290 ppm |
| 2018-02-05 | 9590-004-1110 | 0.270 ppm |
| 2018-02-05 | 9590-005-1155 | 0.440 ppm |
| 2018-02-12 | 9590-010-1145 | 0.120 ppm |
| 2018-02-21 | 9590-001-0845 | 0.260 ppm |
| 2018-02-21 | 9590-005-1006 | 0.420 ppm |
| 2018-03-05 | 9590-001-0959 | 0.250 ppm |
| 2018-03-05 | 9590-002-1032 | 0.360 ppm |
| 2018-03-05 | 9590-003-1115 | 0.420 ppm |
| 2018-03-05 | 9590-004-1140 | 0.240 ppm |
| 2018-03-05 | 9590-005-1214 | 0.430 ppm |
| 2018-03-12 | 9590-010-1112 | 0.110 ppm |
| 2018-04-13 | 9590-001-0913 | 0.270 ppm |
| 2018-04-13 | 9590-002-0955 | 0.360 ppm |
| 2018-04-13 | 9590-003-1045 | 0.420 ppm |
| 2018-04-13 | 9590-004-1120 | 0.250 ppm |
| 2018-04-13 | 9590-005-1215 | 0.450 ppm |
| 2018-04-13 | 9590-010-1330 | ND |
| 2018-05-09 | 9590-001-0900 | 0.250 ppm |
| 2018-05-09 | 9590-002-0945 | 0.350 ppm |
| 2018-05-09 | 9590-003-1025 | 0.430 ppm |
| 2018-05-09 | 9590-004-1055 | 0.240 ppm |
| 2018-05-09 | 9590-005-1140 | 0.430 ppm |
| 2018-05-14 | 9590-010-1118 | ND |
| 2018-05-21 | 9590-010-1110 | ND |
| 2018-06-04 | 9590-001-1345 | 0.250 ppm |
| 2018-06-04 | 9590-002-1410 | 0.350 ppm |
| 2018-06-04 | 9590-003-1433 | 0.400 ppm |
| 2018-06-04 | 9590-004-1500 | 0.240 ppm |
| 2018-06-04 | 9590-005-1125 | 0.440 ppm |
| 2018-06-13 | 9590-010-1130 | ND |
| 2018-07-02 | 9590-001-0915 | 0.250 ppm |
| 2018-07-02 | 9590-002-0951 | 0.340 ppm |
| 2018-07-02 | 9590-003-1033 | 0.410 ppm |
| 2018-07-02 | 9590-004-1110 | 0.240 ppm |
| 2018-07-02 | 9590-005-1145 | 0.440 ppm |
| 2018-07-09 | 9590-010-1015 | ND |
| 2018-08-08 | 9590-001-0845 | 0.280 ppm |
| 2018-08-08 | 9590-002-0940 | 0.350 ppm |
| 2018-08-08 | 9590-003-1030 | 0.430 ppm |
| 2018-08-08 | 9590-004-1115 | 0.250 ppm |
| 2018-08-08 | 9590-005-1200 | 0.430 ppm |
| 2018-08-13 | 9590-010-1125 | ND |
| 2018-09-04 | 9590-001-0930 | 0.270 ppm |
| 2018-09-04 | 9590-002-1015 | 0.330 ppm |
| 2018-09-04 | 9590-003-1045 | 0.420 ppm |
| 2018-09-04 | 9590-004-1120 | 0.240 ppm |
| 2018-09-04 | 9590-005-1205 | 0.450 ppm |
| 2018-09-13 | 9590-010-1115 | ND |
| 2018-10-02 | 9590-001-0900 | 0.280 ppm |
| 2018-10-02 | 9590-002-0935 | 0.350 ppm |
| 2018-10-02 | 9590-003-1015 | 0.440 ppm |
| 2018-10-02 | 9590-004-1048 | 0.260 ppm |
| 2018-10-02 | 9590-005-1125 | 0.480 ppm |
| 2018-10-08 | 9590-010-1128 | ND |
| 2018-11-05 | 9590-001-0825 | 0.290 ppm |
| 2018-11-05 | 9590-002-0855 | 0.360 ppm |
| 2018-11-05 | 9590-003-0925 | 0.440 ppm |
| 2018-11-05 | 9590-004-0955 | 0.260 ppm |
| 2018-11-05 | 9590-005-1028 | 0.480 ppm |
| 2018-11-12 | 9590-010-1030 | ND |
| 2018-12-07 | 9590-001-0850 | 0.300 ppm |
| 2018-12-07 | 9590-002-0936 | 0.370 ppm |
| 2018-12-07 | 9590-003-1010 | 0.460 ppm |
| 2018-12-07 | 9590-004-1055 | 0.270 ppm |
| 2018-12-07 | 9590-005-1135 | 0.480 ppm |
| 2018-12-10 | 9590-010-1125 | ND |
| 2019-02-12 | 4792-010-1415 | ND |
| 2019-03-12 | 4792-010-1210 | 0.106 ppm |
| 2019-03-13 | 4792-001-1200 | 0.752 ppm |
| 2019-03-13 | 4792-002-1045 | 0.436 ppm |
| 2019-03-13 | 4792-004-1115 | 0.265 ppm |
| 2019-03-13 | 4792-005-1235 | 0.495 ppm |
| 2019-03-13 | 4792-006-0940 | 0.500 ppm |
| 2019-03-30 | 4792-006-0700 | 0.426 ppm |
| 2019-03-30 | 4792-015-1100 | 0.475 ppm |
| 2019-04-08 | 4792-001-0920 | 0.246 ppm |
| 2019-04-08 | 4792-003-0950 | 0.404 ppm |
| 2019-04-08 | 4792-004-1010 | 0.219 ppm |
| 2019-04-08 | 4792-005-1040 | 0.428 ppm |
| 2019-04-08 | 4792-006-0830 | 0.442 ppm |
| 2019-04-09 | 4792-010-1345 | ND |
| 2019-04-09 | 4792-015-1055 | 0.493 ppm |
| 2019-05-14 | 4792-001-0939 | 0.259 ppm |
| 2019-05-14 | 4792-003-0838 | 0.406 ppm |
| 2019-05-14 | 4792-004-0756 | 0.227 ppm |
| 2019-05-14 | 4792-005-1232 | 0.350 ppm |
| 2019-05-14 | 4792-006-1118 | 0.434 ppm |
| 2019-05-14 | 4792-010-1300 | ND |
| 2019-05-14 | 4792-015-1030 | 0.468 ppm |
| 2019-06-11 | 4792-001-1120 | 0.239 ppm |
| 2019-06-11 | 4792-002-1015 | 0.302 ppm |
| 2019-06-11 | 4792-003-1045 | 0.387 ppm |
| 2019-06-11 | 4792-004-0940 | 0.216 ppm |
| 2019-06-11 | 4792-005-1335 | 0.399 ppm |
| 2019-06-11 | 4792-006-1335 | 0.401 ppm |
| 2019-06-11 | 4792-010-1205 | ND |
| 2019-06-11 | 4792-015-1215 | 0.445 ppm |
| 2019-07-08 | 4792-001-0950 | 0.270 ppm |
| 2019-07-08 | 4792-002-1035 | 0.340 ppm |
| 2019-07-08 | 4792-003-1055 | 0.437 ppm |
| 2019-07-08 | 4792-004-1020 | 0.239 ppm |
| 2019-07-08 | 4792-005-1400 | 0.480 ppm |
| 2019-07-08 | 4792-006-1315 | 0.450 ppm |
| 2019-07-09 | 4792-010-0950 | ND |
| 2019-07-09 | 4792-015-0900 | 0.460 ppm |
| 2019-08-13 | 4792-001-0930 | 0.284 ppm |
| 2019-08-13 | 4792-002-1010 | 0.376 ppm |
| 2019-08-13 | 4792-003-1025 | 0.467 ppm |
| 2019-08-13 | 4792-004-0955 | 0.261 ppm |
| 2019-08-13 | 4792-005-1210 | 0.487 ppm |
| 2019-08-13 | 4792-006-1155 | 0.488 ppm |
| 2019-08-13 | 4792-010-1142 | ND |
| 2019-08-13 | 4792-015-1125 | 0.549 ppm |
| 2019-09-10 | 4792-001-1045 | 0.289 ppm |
| 2019-09-10 | 4792-002-1145 | 0.381 ppm |
| 2019-09-10 | 4792-003-1210 | 0.471 ppm |
| 2019-09-10 | 4792-004-1125 | 0.266 ppm |
| 2019-09-10 | 4792-005-1230 | 0.487 ppm |
| 2019-09-10 | 4792-006-0955 | 0.508 ppm |
| 2019-09-10 | 4792-010-1130 | ND |
| 2019-09-10 | 4792-015-0935 | 0.543 ppm |
| 2019-10-15 | 4792-001-0740 | 0.203 ppm |
| 2019-10-15 | 4792-002-1110 | 0.266 ppm |
| 2019-10-15 | 4792-003-1135 | 0.312 ppm |
| 2019-10-15 | 4792-004-1025 | 0.182 ppm |
| 2019-10-15 | 4792-005-1345 | 0.322 ppm |
| 2019-10-15 | 4792-006-0945 | 0.332 ppm |
| 2019-10-15 | 4792-010-1015 | ND |
| 2019-10-15 | 4792-015-0845 | 0.360 ppm |
| 2019-11-12 | 4792-010-0905 | ND |
| 2019-11-19 | 4792-001-1032 | 0.276 ppm |
| 2019-11-19 | 4792-002-1057 | 0.350 ppm |
| 2019-11-19 | 4792-003-1130 | 0.435 ppm |
| 2019-11-19 | 4792-005-1215 | 0.453 ppm |
| 2019-11-19 | 4792-006-0955 | 0.461 ppm |
| 2019-11-19 | 4792-015-0900 | 0.525 ppm |
| 2019-12-10 | 4792-001-0945 | 0.235 ppm |
| 2019-12-10 | 4792-002-1025 | 0.305 ppm |
| 2019-12-10 | 4792-003-1105 | 0.372 ppm |
| 2019-12-10 | 4792-005-1145 | 0.391 ppm |
| 2019-12-10 | 4792-006-0905 | 0.394 ppm |
| 2019-12-10 | 4792-010-1100 | ND |