Fluoride
U.S. Marine Corps - Housing Coleville
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.
330
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 | 0.680 ppm | 83 | 82 | ND - 2.20 ppm |
| 2015 | 0.598 ppm | 89 | 85 | ND - 2.20 ppm |
| 2016 | 0.621 ppm | 30 | 30 | 0.420 ppm - 0.760 ppm |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | 0.550 ppm | 75 | 75 | 0.130 ppm - 0.830 ppm |
| 2019 | 0.531 ppm | 53 | 53 | 0.200 ppm - 0.820 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 |
|---|---|---|
| 2014-01-02 | 2326-007-1047 | 0.330 ppm |
| 2014-01-09 | 2326-007-0855 | 0.320 ppm |
| 2014-01-16 | 2326-007-0808 | 0.410 ppm |
| 2014-01-22 | 2326-001-1045 | 0.370 ppm |
| 2014-01-22 | 2326-004-1018 | 0.450 ppm |
| 2014-01-22 | 2326-005-1113 | 2.10 ppm |
| 2014-01-22 | 2326-008-1014 | 0.520 ppm |
| 2014-01-29 | 2326-007-1011 | 0.450 ppm |
| 2014-02-05 | 2326-007-0853 | 0.440 ppm |
| 2014-02-12 | 2326-007-0918 | 0.510 ppm |
| 2014-02-19 | 2326-001-1027 | 0.460 ppm |
| 2014-02-19 | 2326-004-1000 | 0.620 ppm |
| 2014-02-19 | 2326-005-1108 | 2.20 ppm |
| 2014-02-19 | 2326-007-0908 | 0.380 ppm |
| 2014-02-19 | 2326-008-0958 | 0.610 ppm |
| 2014-04-09 | 2326-001-0950 | 0.540 ppm |
| 2014-04-09 | 2326-004-0858 | 0.680 ppm |
| 2014-04-09 | 2326-005-0925 | 2.00 ppm |
| 2014-04-09 | 2326-008-0850 | 0.680 ppm |
| 2014-05-07 | 2326-007-0949 | 0.0570 ppm |
| 2014-05-14 | 2326-001-1010 | 0.600 ppm |
| 2014-05-14 | 2326-004-0939 | 0.620 ppm |
| 2014-05-14 | 2326-005-1026 | 1.80 ppm |
| 2014-05-14 | 2326-007-0847 | 0.490 ppm |
| 2014-05-14 | 2326-008-0931 | 0.650 ppm |
| 2014-05-21 | 2326-007-1017 | 0.520 ppm |
| 2014-05-30 | 2326-007-1109 | ND |
| 2014-06-04 | 2326-007-0953 | 0.300 ppm |
| 2014-06-11 | 2326-007-1133 | 0.440 ppm |
| 2014-06-18 | 2326-001-1035 | 0.550 ppm |
| 2014-06-18 | 2326-004-1008 | 0.600 ppm |
| 2014-06-18 | 2326-005-1105 | 1.90 ppm |
| 2014-06-18 | 2326-007-0910 | 0.440 ppm |
| 2014-06-18 | 2326-008-1013 | 0.700 ppm |
| 2014-06-25 | 2326-007-0912 | 0.310 ppm |
| 2014-07-02 | 2326-007-0959 | 0.400 ppm |
| 2014-07-09 | 2326-007-1037 | 0.420 ppm |
| 2014-07-16 | 2326-001-1105 | 0.480 ppm |
| 2014-07-16 | 2326-004-1040 | 0.510 ppm |
| 2014-07-16 | 2326-005-1053 | 1.80 ppm |
| 2014-07-16 | 2326-007-0920 | 0.430 ppm |
| 2014-07-16 | 2326-008-1033 | 0.640 ppm |
| 2014-07-23 | 2326-007-1025 | 0.480 ppm |
| 2014-07-30 | 2326-007-0908 | 0.460 ppm |
| 2014-08-06 | 2326-007-0847 | 0.490 ppm |
| 2014-08-13 | 2326-007-0903 | 0.450 ppm |
| 2014-08-20 | 2326-001-1100 | 0.430 ppm |
| 2014-08-20 | 2326-004-1041 | 0.490 ppm |
| 2014-08-20 | 2326-005-1022 | 2.20 ppm |
| 2014-08-20 | 2326-007-0912 | 0.460 ppm |
| 2014-08-20 | 2326-008-1035 | 0.570 ppm |
| 2014-08-27 | 2326-007-1133 | 0.370 ppm |
| 2014-09-03 | 2326-007-0925 | 0.440 ppm |
| 2014-09-10 | 2326-007-0915 | 0.440 ppm |
| 2014-09-17 | 2326-007-1014 | 0.430 ppm |
| 2014-09-24 | 2326-001-1108 | 0.440 ppm |
| 2014-09-24 | 2326-004-1019 | 0.490 ppm |
| 2014-09-24 | 2326-005-1045 | 2.00 ppm |
| 2014-09-24 | 2326-007-0934 | 0.410 ppm |
| 2014-09-24 | 2326-008-1010 | 0.520 ppm |
| 2014-10-01 | 2326-007-0950 | 0.520 ppm |
| 2014-10-10 | 2326-007-0903 | 0.170 ppm |
| 2014-10-15 | 2326-007-1012 | 0.450 ppm |
| 2014-10-22 | 2326-001-1014 | 0.600 ppm |
| 2014-10-22 | 2326-005-0955 | 2.10 ppm |
| 2014-10-22 | 2326-007-0913 | 0.470 ppm |
| 2014-10-22 | 2326-008-0940 | 0.640 ppm |
| 2014-10-29 | 2326-007-0956 | 0.520 ppm |
| 2014-11-05 | 2326-007-0932 | 0.530 ppm |
| 2014-11-12 | 2326-007-0929 | 0.460 ppm |
| 2014-11-20 | 2326-007-0958 | 0.560 ppm |
| 2014-11-25 | 2326-001-1040 | 0.480 ppm |
| 2014-11-25 | 2326-005-1108 | 1.90 ppm |
| 2014-11-25 | 2326-007-0922 | 0.430 ppm |
| 2014-11-25 | 2326-008-1030 | 0.630 ppm |
| 2014-12-03 | 2326-007-1003 | 0.480 ppm |
| 2014-12-10 | 2326-007-0915 | 0.470 ppm |
| 2014-12-17 | 2326-007-0914 | 0.560 ppm |
| 2014-12-18 | 2326-001-1113 | 0.400 ppm |
| 2014-12-18 | 2326-005-1200 | 2.20 ppm |
| 2014-12-18 | 2326-008-1101 | 0.530 ppm |
| 2014-12-23 | 2326-007-0952 | 0.410 ppm |
| 2014-12-30 | 2326-007-1012 | 0.660 ppm |
| 2015-01-07 | 2326-007-1049 | 0.550 ppm |
| 2015-01-14 | 2326-007-0952 | 0.460 ppm |
| 2015-01-21 | 2326-007-0857 | 0.490 ppm |
| 2015-01-28 | 2326-001-1023 | 0.380 ppm |
| 2015-01-28 | 2326-005-1125 | 2.20 ppm |
| 2015-01-28 | 2326-007-0918 | 0.490 ppm |
| 2015-01-28 | 2326-008-1008 | 0.630 ppm |
| 2015-02-11 | 2326-007-0953 | 0.560 ppm |
| 2015-02-18 | 2326-007-1012 | 0.540 ppm |
| 2015-02-19 | 2326-001-1140 | 0.500 ppm |
| 2015-02-19 | 2326-005-1226 | 2.00 ppm |
| 2015-02-19 | 2326-008-1126 | 0.580 ppm |
| 2015-02-25 | 2326-007-1010 | 0.450 ppm |
| 2015-03-04 | 2326-007-0940 | 0.290 ppm |
| 2015-03-11 | 2326-007-1017 | 0.420 ppm |
| 2015-03-18 | 2326-007-1210 | 0.460 ppm |
| 2015-03-25 | 2326-001-1100 | 0.370 ppm |
| 2015-03-25 | 2326-005-1045 | 2.10 ppm |
| 2015-03-25 | 2326-007-0954 | 0.460 ppm |
| 2015-03-25 | 2326-008-1033 | 0.570 ppm |
| 2015-04-01 | 2326-007-1033 | 0.690 ppm |
| 2015-04-08 | 2326-007-1018 | 0.450 ppm |
| 2015-04-15 | 2326-007-1003 | 0.460 ppm |
| 2015-04-22 | 2326-001-1114 | 0.450 ppm |
| 2015-04-22 | 2326-005-1145 | 2.10 ppm |
| 2015-04-22 | 2326-007-0945 | 0.540 ppm |
| 2015-04-22 | 2326-008-1109 | 0.620 ppm |
| 2015-04-29 | 2326-007-0912 | 0.410 ppm |
| 2015-05-06 | 2326-007-0930 | 0.490 ppm |
| 2015-05-15 | 2326-007-1200 | 0.130 ppm |
| 2015-05-20 | 2326-007-0903 | 0.300 ppm |
| 2015-05-27 | 2326-001-1033 | 0.290 ppm |
| 2015-05-27 | 2326-004-1020 | 0.490 ppm |
| 2015-05-27 | 2326-005-1052 | 1.50 ppm |
| 2015-05-27 | 2326-007-0928 | 0.240 ppm |
| 2015-05-27 | 2326-008-1010 | 0.490 ppm |
| 2015-06-03 | 2326-007-0935 | 0.330 ppm |
| 2015-06-10 | 2326-007-0912 | 0.380 ppm |
| 2015-06-17 | 2326-001-1000 | 0.360 ppm |
| 2015-06-17 | 2326-004-0930 | 0.380 ppm |
| 2015-06-17 | 2326-005-1015 | 1.40 ppm |
| 2015-06-17 | 2326-007-0852 | 0.370 ppm |
| 2015-06-17 | 2326-008-0920 | 0.460 ppm |
| 2015-06-24 | 2326-007-0922 | 0.200 ppm |
| 2015-07-01 | 2326-007-1115 | 0.450 ppm |
| 2015-07-08 | 2326-007-1100 | 0.430 ppm |
| 2015-07-15 | 2326-007-0754 | 0.470 ppm |
| 2015-07-22 | 2326-001-1037 | 0.430 ppm |
| 2015-07-22 | 2326-004-1104 | 0.490 ppm |
| 2015-07-22 | 2326-005-1115 | 2.10 ppm |
| 2015-07-22 | 2326-007-0937 | 0.430 ppm |
| 2015-07-22 | 2326-008-1056 | 0.520 ppm |
| 2015-07-29 | 2326-007-0930 | 0.430 ppm |
| 2015-08-05 | 2326-007-0937 | 0.500 ppm |
| 2015-08-12 | 2326-001-0913 | 0.500 ppm |
| 2015-08-12 | 2326-004-0947 | 1.90 ppm |
| 2015-08-12 | 2326-005-0935 | 0.750 ppm |
| 2015-08-12 | 2326-007-0834 | 0.530 ppm |
| 2015-08-12 | 2326-008-0943 | 0.520 ppm |
| 2015-08-19 | 2326-007-0913 | 0.430 ppm |
| 2015-08-26 | 2326-007-1029 | 0.370 ppm |
| 2015-09-09 | 2326-007-0919 | 0.620 ppm |
| 2015-09-16 | 2326-001-0905 | 0.290 ppm |
| 2015-09-16 | 2326-004-0942 | 0.420 ppm |
| 2015-09-16 | 2326-005-0925 | 1.50 ppm |
| 2015-09-16 | 2326-007-1024 | 0.480 ppm |
| 2015-09-16 | 2326-008-0936 | 0.400 ppm |
| 2015-09-23 | 2326-007-0920 | 0.580 ppm |
| 2015-10-08 | 2326-007-0620 | 1.10 ppm |
| 2015-10-23 | 2326-007-0910 | ND |
| 2015-10-28 | 2326-001-1038 | 0.580 ppm |
| 2015-10-28 | 2326-004-1003 | 0.620 ppm |
| 2015-10-28 | 2326-007-0916 | ND |
| 2015-10-28 | 2326-008-0958 | 0.710 ppm |
| 2015-11-04 | 2326-007-0850 | ND |
| 2015-11-11 | 2326-007-0933 | 0.290 ppm |
| 2015-11-18 | 2326-001-0958 | 0.530 ppm |
| 2015-11-18 | 2326-004-0946 | 0.590 ppm |
| 2015-11-18 | 2326-007-0818 | ND |
| 2015-11-18 | 2326-008-0942 | 0.580 ppm |
| 2015-11-25 | 2326-007-0908 | 0.320 ppm |
| 2015-12-02 | 2326-007-0822 | 0.500 ppm |
| 2015-12-09 | 2326-001-1000 | 0.510 ppm |
| 2015-12-09 | 2326-004-0940 | 0.640 ppm |
| 2015-12-09 | 2326-007-0902 | 0.390 ppm |
| 2015-12-09 | 2326-008-0937 | 0.640 ppm |
| 2015-12-16 | 2326-007-0906 | 0.490 ppm |
| 2015-12-23 | 2326-007-0925 | 0.540 ppm |
| 2015-12-30 | 2326-007-0917 | 0.580 ppm |
| 2016-01-06 | 2326-007-0938 | 0.570 ppm |
| 2016-01-13 | 2326-007-0930 | 0.590 ppm |
| 2016-01-20 | 2326-001-0955 | 0.710 ppm |
| 2016-01-20 | 2326-004-0940 | 0.720 ppm |
| 2016-01-20 | 2326-007-0855 | 0.540 ppm |
| 2016-01-20 | 2326-008-0943 | 0.560 ppm |
| 2016-01-27 | 2326-007-0852 | 0.580 ppm |
| 2016-02-03 | 2326-007-0926 | 0.590 ppm |
| 2016-02-10 | 2326-001-0940 | 0.730 ppm |
| 2016-02-10 | 2326-004-0921 | 0.590 ppm |
| 2016-02-10 | 2326-007-0920 | 0.680 ppm |
| 2016-02-10 | 2326-008-0918 | 0.710 ppm |
| 2016-02-19 | 2326-007-0916 | 0.620 ppm |
| 2016-02-25 | 2326-007-0825 | 0.700 ppm |
| 2016-03-02 | 2326-007-0948 | 0.760 ppm |
| 2016-03-09 | 2326-007-0908 | 0.460 ppm |
| 2016-03-16 | 2326-001-0920 | 0.530 ppm |
| 2016-03-16 | 2326-004-0916 | 0.760 ppm |
| 2016-03-16 | 2326-007-0846 | 0.500 ppm |
| 2016-03-16 | 2326-008-0913 | 0.670 ppm |
| 2016-03-30 | 2326-007-0856 | 0.570 ppm |
| 2016-04-06 | 2326-007-0840 | 0.610 ppm |
| 2016-04-13 | 2326-001-0938 | 0.730 ppm |
| 2016-04-13 | 2326-004-0928 | 0.600 ppm |
| 2016-04-13 | 2326-007-0900 | 0.640 ppm |
| 2016-04-13 | 2326-008-0925 | 0.670 ppm |
| 2016-04-20 | 2326-007-0956 | 0.630 ppm |
| 2016-04-27 | 2326-007-0825 | 0.750 ppm |
| 2016-09-28 | 2326-007-0901 | 0.450 ppm |
| 2016-10-26 | 2326-007-0848 | 0.420 ppm |
| 2018-01-03 | 2326-007-0824 | 0.640 ppm |
| 2018-01-10 | 2326-007-0830 | 0.670 ppm |
| 2018-01-17 | 2326-001-1012 | 0.280 ppm |
| 2018-01-17 | 2326-004-1000 | 0.700 ppm |
| 2018-01-17 | 2326-007-0902 | 0.630 ppm |
| 2018-01-17 | 2326-008-0955 | 0.690 ppm |
| 2018-01-24 | 2326-007-0822 | 0.520 ppm |
| 2018-01-31 | 2326-007-0802 | 0.550 ppm |
| 2018-02-07 | 2326-007-0851 | 0.500 ppm |
| 2018-02-14 | 2326-001-0850 | 0.430 ppm |
| 2018-02-14 | 2326-004-0845 | 0.570 ppm |
| 2018-02-14 | 2326-007-0842 | 0.520 ppm |
| 2018-02-14 | 2326-008-0840 | 0.550 ppm |
| 2018-03-21 | 2326-001-0942 | 0.240 ppm |
| 2018-03-21 | 2326-004-0930 | 0.590 ppm |
| 2018-03-21 | 2326-007-0817 | 0.550 ppm |
| 2018-03-21 | 2326-008-0935 | 0.740 ppm |
| 2018-03-28 | 2326-007-0841 | 0.580 ppm |
| 2018-04-04 | 2326-007-0841 | 0.420 ppm |
| 2018-04-11 | 2326-001-1020 | 0.460 ppm |
| 2018-04-11 | 2326-004-1010 | 0.240 ppm |
| 2018-04-11 | 2326-007-0834 | 0.530 ppm |
| 2018-04-11 | 2326-008-1000 | 0.710 ppm |
| 2018-05-02 | 2326-006-0802 | 0.730 ppm |
| 2018-05-09 | 2326-007-0832 | 0.630 ppm |
| 2018-05-16 | 2326-001-0920 | 0.140 ppm |
| 2018-05-16 | 2326-004-0855 | 0.560 ppm |
| 2018-05-16 | 2326-007-0836 | 0.610 ppm |
| 2018-05-16 | 2326-008-0850 | 0.720 ppm |
| 2018-05-23 | 2326-007-0813 | 0.690 ppm |
| 2018-06-06 | 2326-007-0804 | 0.550 ppm |
| 2018-06-13 | 2326-001-0845 | 0.530 ppm |
| 2018-06-13 | 2326-004-0805 | 0.630 ppm |
| 2018-06-13 | 2326-007-0821 | 0.460 ppm |
| 2018-06-13 | 2326-008-0800 | 0.630 ppm |
| 2018-06-19 | 2326-007-0910 | 0.570 ppm |
| 2018-06-27 | 2326-007-0837 | 0.520 ppm |
| 2018-07-05 | 2326-007-0851 | 0.750 ppm |
| 2018-07-11 | 2326-007-0816 | 0.720 ppm |
| 2018-07-18 | 2326-007-0811 | 0.700 ppm |
| 2018-07-25 | 2326-001-0935 | 0.130 ppm |
| 2018-07-25 | 2326-004-0925 | 0.620 ppm |
| 2018-07-25 | 2326-007-0911 | 0.730 ppm |
| 2018-07-25 | 2326-008-0918 | 0.760 ppm |
| 2018-08-08 | 2326-007-0817 | 0.600 ppm |
| 2018-08-15 | 2326-001-0940 | 0.510 ppm |
| 2018-08-15 | 2326-008-0910 | 0.830 ppm |
| 2018-08-22 | 2326-007-0841 | 0.610 ppm |
| 2018-08-29 | 2326-007-0826 | 0.680 ppm |
| 2018-09-12 | 2326-007-0812 | 0.560 ppm |
| 2018-09-19 | 2326-001-0905 | 0.450 ppm |
| 2018-09-19 | 2326-004-0850 | 0.570 ppm |
| 2018-09-19 | 2326-007-0832 | 0.640 ppm |
| 2018-09-19 | 2326-008-0845 | 0.730 ppm |
| 2018-09-26 | 2326-007-0826 | 0.660 ppm |
| 2018-10-03 | 2326-007-0851 | 0.610 ppm |
| 2018-10-10 | 2326-007-0805 | 0.590 ppm |
| 2018-10-17 | 2326-007-0858 | 0.180 ppm |
| 2018-10-24 | 2326-001-0955 | 0.470 ppm |
| 2018-10-24 | 2326-001-1045 | 0.480 ppm |
| 2018-10-24 | 2326-004-0945 | 0.270 ppm |
| 2018-10-24 | 2326-004-1030 | 0.270 ppm |
| 2018-10-24 | 2326-007-0916 | 0.450 ppm |
| 2018-10-24 | 2326-008-0940 | 0.700 ppm |
| 2018-10-24 | 2326-008-1024 | 0.680 ppm |
| 2018-10-31 | 2326-007-0843 | 0.510 ppm |
| 2018-11-07 | 2326-007-0902 | 0.700 ppm |
| 2018-11-14 | 2326-001-0950 | 0.450 ppm |
| 2018-11-14 | 2326-004-0925 | 0.520 ppm |
| 2018-11-14 | 2326-007-0826 | 0.480 ppm |
| 2018-11-14 | 2326-008-0920 | 0.530 ppm |
| 2018-11-20 | 2326-007-0845 | 0.430 ppm |
| 2018-11-28 | 2326-007-0906 | 0.410 ppm |
| 2018-12-05 | 2326-007-0940 | 0.440 ppm |
| 2018-12-19 | 2326-007-0831 | 0.540 ppm |
| 2019-01-02 | 2326-007-0831 | 0.460 ppm |
| 2019-01-09 | 2326-007-0822 | 0.370 ppm |
| 2019-01-16 | 2326-007-0843 | 0.550 ppm |
| 2019-01-23 | 2326-001-1000 | 0.410 ppm |
| 2019-01-23 | 2326-004-0950 | 0.200 ppm |
| 2019-01-23 | 2326-007-0846 | 0.500 ppm |
| 2019-01-23 | 2326-008-0945 | 0.690 ppm |
| 2019-01-30 | 2326-007-0856 | 0.570 ppm |
| 2019-02-06 | 2326-007-0938 | 0.650 ppm |
| 2019-02-13 | 2326-007-0835 | 0.430 ppm |
| 2019-02-20 | 2326-001-0805 | 0.470 ppm |
| 2019-02-20 | 2326-004-0825 | 0.540 ppm |
| 2019-02-20 | 2326-007-0812 | 0.300 ppm |
| 2019-02-20 | 2326-008-0820 | 0.820 ppm |
| 2019-02-27 | 2326-007-0821 | 0.440 ppm |
| 2019-03-06 | 2326-007-0723 | 0.560 ppm |
| 2019-03-13 | 2326-001-0935 | 0.440 ppm |
| 2019-03-13 | 2326-004-0920 | 0.510 ppm |
| 2019-03-13 | 2326-007-0805 | 0.440 ppm |
| 2019-03-13 | 2326-008-0925 | 0.530 ppm |
| 2019-03-20 | 2326-007-0823 | 0.480 ppm |
| 2019-03-26 | 2326-007-0900 | 0.510 ppm |
| 2019-04-03 | 2326-007-0806 | 0.480 ppm |
| 2019-04-10 | 2326-007-1036 | 0.410 ppm |
| 2019-04-17 | 2326-001-0938 | 0.420 ppm |
| 2019-04-17 | 2326-004-0925 | 0.540 ppm |
| 2019-04-17 | 2326-007-0829 | 0.580 ppm |
| 2019-04-17 | 2326-008-0919 | 0.750 ppm |
| 2019-04-24 | 2326-007-0910 | 0.510 ppm |
| 2019-05-01 | 2326-007-0921 | 0.430 ppm |
| 2019-05-08 | 2326-007-0919 | 0.420 ppm |
| 2019-05-15 | 2326-001-0950 | 0.440 ppm |
| 2019-05-15 | 2326-004-0927 | 0.590 ppm |
| 2019-05-15 | 2326-007-0913 | 0.510 ppm |
| 2019-05-15 | 2326-008-0925 | 0.690 ppm |
| 2019-06-19 | 2326-001-0935 | 0.420 ppm |
| 2019-06-19 | 2326-004-0924 | 0.500 ppm |
| 2019-06-19 | 2326-008-0920 | 0.620 ppm |
| 2019-07-17 | 2326-001-0948 | 0.500 ppm |
| 2019-07-17 | 2326-004-0938 | 0.580 ppm |
| 2019-07-17 | 2326-008-0935 | 0.610 ppm |
| 2019-08-21 | 2326-001-0952 | 0.640 ppm |
| 2019-08-21 | 2326-004-0938 | 0.570 ppm |
| 2019-08-21 | 2326-008-0936 | 0.800 ppm |
| 2019-10-16 | 2326-001-0848 | 0.820 ppm |
| 2019-10-16 | 2326-001-0851 | 0.520 ppm |
| 2019-10-16 | 2326-001-0901 | 0.570 ppm |
| 2019-11-13 | 2326-001-0945 | 0.640 ppm |
| 2019-11-13 | 2326-004-0944 | 0.300 ppm |
| 2019-11-13 | 2326-008-0925 | 0.610 ppm |
| 2019-12-11 | 2326-001-0941 | 0.490 ppm |
| 2019-12-11 | 2326-004-0915 | 0.650 ppm |
| 2019-12-11 | 2326-008-0912 | 0.680 ppm |