Nitrate
Rancho California Water District
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.
461
Samples
0
Samples exceeding legal limit (MCL)
413
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 2.05 ppm | 75 | 69 | ND - 5.87 ppm |
| 2015 | 1.90 ppm | 93 | 86 | ND - 5.65 ppm |
| 2016 | 2.31 ppm | 67 | 64 | ND - 5.10 ppm |
| 2017 | 2.39 ppm | 77 | 72 | ND - 6.60 ppm |
| 2018 | 2.07 ppm | 85 | 76 | ND - 6.10 ppm |
| 2019 | 2.28 ppm | 64 | 46 | ND - 6.50 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 | Lab ID | Result |
|---|---|---|
| 2014-01-07 | 4790-041-0945 | 3.61 ppm |
| 2014-01-07 | 4790-053-0900 | 3.16 ppm |
| 2014-01-09 | 4790-015-0940 | 3.16 ppm |
| 2014-01-09 | 4790-045-0945 | 1.45 ppm |
| 2014-01-16 | 4790-090-1039 | ND |
| 2014-01-21 | 4790-038-0830 | 1.33 ppm |
| 2014-01-28 | 4790-024-0900 | 4.74 ppm |
| 2014-01-28 | 4790-047-0800 | ND |
| 2014-01-28 | 4790-059-0930 | 3.39 ppm |
| 2014-02-04 | 4790-097-0910 | 0.474 ppm |
| 2014-02-05 | 4790-071-1230 | 3.39 ppm |
| 2014-02-06 | 4790-028-1127 | 0.452 ppm |
| 2014-02-07 | 4790-018-1130 | 4.52 ppm |
| 2014-03-05 | 4790-028-1036 | 0.294 ppm |
| 2014-03-11 | 4790-037-1125 | 0.836 ppm |
| 2014-03-12 | 4790-043-1200 | 0.633 ppm |
| 2014-03-12 | 4790-071-0854 | 2.48 ppm |
| 2014-03-13 | 4790-027-0911 | 2.15 ppm |
| 2014-04-02 | 4790-084-1000 | ND |
| 2014-04-02 | 4790-085-1030 | 0.271 ppm |
| 2014-04-02 | 4790-086-1100 | 0.384 ppm |
| 2014-04-03 | 4790-043-1015 | 0.723 ppm |
| 2014-04-03 | 4790-071-0930 | 2.48 ppm |
| 2014-04-09 | 4790-028-1032 | 0.407 ppm |
| 2014-04-09 | 4790-042-1122 | 1.17 ppm |
| 2014-04-15 | 4790-053-0900 | 3.39 ppm |
| 2014-04-16 | 4790-024-0945 | 4.74 ppm |
| 2014-04-16 | 4790-059-1040 | 2.48 ppm |
| 2014-05-08 | 4790-028-1000 | 0.407 ppm |
| 2014-05-08 | 4790-048-0930 | 1.08 ppm |
| 2014-05-15 | 4790-036-1030 | 0.339 ppm |
| 2014-05-27 | 4790-071-1230 | 1.97 ppm |
| 2014-05-28 | 4790-143-0930 | 0.384 ppm |
| 2014-06-03 | 4790-025-0855 | 3.61 ppm |
| 2014-06-03 | 4790-028-1115 | 0.474 ppm |
| 2014-06-03 | 4790-035-1040 | 0.768 ppm |
| 2014-06-03 | 4790-044-0000 | 3.61 ppm |
| 2014-06-03 | 4790-051-1140 | 0.994 ppm |
| 2014-06-04 | 4790-071-0933 | 3.16 ppm |
| 2014-07-02 | 4790-012-0852 | 1.33 ppm |
| 2014-07-03 | 4790-028-1205 | 0.474 ppm |
| 2014-07-03 | 4790-053-1108 | 3.16 ppm |
| 2014-07-10 | 4790-024-0840 | 4.07 ppm |
| 2014-07-10 | 4790-059-1045 | 3.16 ppm |
| 2014-07-16 | 4790-071-1100 | 3.16 ppm |
| 2014-08-06 | 4790-017-1140 | 0.633 ppm |
| 2014-08-06 | 4790-071-1210 | 3.61 ppm |
| 2014-08-06 | 4790-143-0905 | ND |
| 2014-08-07 | 4790-028-1210 | 0.474 ppm |
| 2014-08-07 | 4790-034-1225 | 1.06 ppm |
| 2014-08-07 | 4790-040-1010 | 3.39 ppm |
| 2014-08-07 | 4790-046-0840 | ND |
| 2014-08-07 | 4790-095-0905 | 0.339 ppm |
| 2014-08-08 | 4790-025-0910 | 2.94 ppm |
| 2014-09-03 | 4790-028-1015 | 0.271 ppm |
| 2014-09-03 | 4790-071-1035 | 3.61 ppm |
| 2014-09-04 | 4790-059-0935 | 2.94 ppm |
| 2014-10-01 | 4790-042-1120 | 0.768 ppm |
| 2014-10-02 | 4790-024-0935 | 4.07 ppm |
| 2014-10-02 | 4790-028-1115 | 0.294 ppm |
| 2014-10-02 | 4790-029-0940 | 2.17 ppm |
| 2014-10-02 | 4790-041-1018 | 3.61 ppm |
| 2014-10-02 | 4790-059-0900 | 2.94 ppm |
| 2014-10-08 | 4790-071-0900 | 3.39 ppm |
| 2014-10-09 | 4790-047-1000 | ND |
| 2014-10-09 | 4790-053-0945 | 3.39 ppm |
| 2014-11-06 | 4790-019-1150 | 5.65 ppm |
| 2014-11-06 | 4790-028-1000 | 0.384 ppm |
| 2014-11-06 | 4790-058-1045 | 0.474 ppm |
| 2014-11-06 | 4790-071-1115 | 3.84 ppm |
| 2014-11-19 | 4790-019-0940 | 5.20 ppm |
| 2014-12-04 | 4790-028-1035 | 0.452 ppm |
| 2014-12-09 | 4790-019-1000 | 5.87 ppm |
| 2014-12-09 | 4790-071-1110 | 3.39 ppm |
| 2014-12-18 | 4790-065-0845 | 4.29 ppm |
| 2015-01-07 | 4790-053-1145 | 4.07 ppm |
| 2015-01-07 | 4790-071-1015 | 2.94 ppm |
| 2015-01-08 | 4790-015-1000 | 2.94 ppm |
| 2015-01-08 | 4790-038-0845 | 1.47 ppm |
| 2015-01-08 | 4790-045-1015 | 2.48 ppm |
| 2015-01-13 | 4790-059-0915 | 2.71 ppm |
| 2015-01-13 | 4790-090-1030 | 0.271 ppm |
| 2015-01-14 | 4790-041-1100 | 3.84 ppm |
| 2015-01-20 | 4790-024-1000 | 4.29 ppm |
| 2015-01-21 | 4790-028-1100 | 0.407 ppm |
| 2015-01-27 | 4790-047-0930 | ND |
| 2015-01-29 | 4790-142-1030 | 0.248 ppm |
| 2015-02-05 | 4790-028-1015 | 0.452 ppm |
| 2015-02-05 | 4790-071-1235 | 3.84 ppm |
| 2015-02-06 | 4790-019-0900 | 5.65 ppm |
| 2015-02-06 | 4790-097-0815 | 0.497 ppm |
| 2015-02-20 | 4790-034-0945 | 0.926 ppm |
| 2015-03-04 | 4790-037-0942 | 0.633 ppm |
| 2015-03-05 | 4790-028-0932 | 0.474 ppm |
| 2015-03-05 | 4790-071-1050 | 1.99 ppm |
| 2015-03-11 | 4790-048-1048 | 0.474 ppm |
| 2015-04-08 | 4790-046-0858 | ND |
| 2015-04-09 | 4790-043-0945 | 0.474 ppm |
| 2015-04-14 | 4790-024-0850 | 3.84 ppm |
| 2015-04-14 | 4790-059-0920 | 2.71 ppm |
| 2015-04-15 | 4790-028-1115 | 0.497 ppm |
| 2015-04-16 | 4790-017-1030 | 0.542 ppm |
| 2015-04-16 | 4790-071-1010 | 3.61 ppm |
| 2015-04-21 | 4790-018-0930 | 4.74 ppm |
| 2015-04-21 | 4790-084-1020 | 0.294 ppm |
| 2015-04-21 | 4790-085-1100 | 0.226 ppm |
| 2015-04-21 | 4790-086-1120 | 0.271 ppm |
| 2015-04-22 | 4790-053-1200 | 3.16 ppm |
| 2015-04-22 | 4790-142-1015 | 0.316 ppm |
| 2015-05-06 | 4790-028-1215 | 0.520 ppm |
| 2015-05-06 | 4790-143-1050 | 0.248 ppm |
| 2015-05-07 | 4790-019-1055 | 5.20 ppm |
| 2015-05-07 | 4790-036-1155 | 0.271 ppm |
| 2015-05-07 | 4790-065-0930 | 3.39 ppm |
| 2015-05-14 | 4790-097-1145 | 0.429 ppm |
| 2015-05-15 | 4790-048-0855 | 0.452 ppm |
| 2015-05-19 | 4790-018-1105 | 4.97 ppm |
| 2015-06-02 | 4790-028-1050 | 0.542 ppm |
| 2015-06-02 | 4790-045-1202 | 1.42 ppm |
| 2015-06-02 | 4790-051-1122 | 0.633 ppm |
| 2015-06-03 | 4790-035-1107 | 0.497 ppm |
| 2015-06-03 | 4790-044-1033 | 2.94 ppm |
| 2015-06-04 | 4790-071-0947 | 2.03 ppm |
| 2015-07-07 | 4790-015-1000 | 3.16 ppm |
| 2015-07-07 | 4790-024-0930 | 3.84 ppm |
| 2015-07-07 | 4790-059-0845 | 2.71 ppm |
| 2015-07-14 | 4790-028-1000 | 0.542 ppm |
| 2015-07-14 | 4790-071-1140 | 4.07 ppm |
| 2015-07-14 | 4790-142-0000 | 0.248 ppm |
| 2015-07-14 | 4790-142-1020 | 0.248 ppm |
| 2015-07-16 | 4790-053-1200 | 3.16 ppm |
| 2015-07-28 | 4790-012-1006 | 2.26 ppm |
| 2015-08-04 | 4790-018-1005 | 4.74 ppm |
| 2015-08-04 | 4790-028-1105 | 0.565 ppm |
| 2015-08-04 | 4790-034-1220 | 0.994 ppm |
| 2015-08-04 | 4790-071-1245 | 4.29 ppm |
| 2015-08-05 | 4790-143-1135 | ND |
| 2015-08-06 | 4790-017-1245 | 0.520 ppm |
| 2015-08-06 | 4790-019-1210 | 5.20 ppm |
| 2015-08-06 | 4790-025-1140 | 2.71 ppm |
| 2015-08-06 | 4790-095-1020 | 0.294 ppm |
| 2015-08-07 | 4790-027-0840 | 2.03 ppm |
| 2015-08-19 | 4790-046-1250 | ND |
| 2015-09-09 | 4790-028-0955 | 0.565 ppm |
| 2015-09-09 | 4790-058-1017 | 0.452 ppm |
| 2015-09-10 | 4790-071-1113 | 2.48 ppm |
| 2015-10-06 | 4790-065-1045 | 3.61 ppm |
| 2015-10-08 | 4790-024-0900 | 4.52 ppm |
| 2015-10-08 | 4790-042-1030 | 1.45 ppm |
| 2015-10-08 | 4790-059-0930 | 2.71 ppm |
| 2015-10-09 | 4790-029-1000 | 2.19 ppm |
| 2015-10-14 | 4790-028-1145 | 0.565 ppm |
| 2015-10-14 | 4790-142-1045 | ND |
| 2015-10-22 | 4790-053-1000 | 3.39 ppm |
| 2015-10-22 | 4790-071-0910 | 4.29 ppm |
| 2015-11-03 | 4790-031-0940 | 0.226 ppm |
| 2015-11-03 | 4790-143-1040 | ND |
| 2015-11-04 | 4790-035-1240 | 0.497 ppm |
| 2015-11-04 | 4790-143-0955 | 0.248 ppm |
| 2015-11-10 | 4790-018-1055 | 4.74 ppm |
| 2015-11-10 | 4790-058-1015 | 0.384 ppm |
| 2015-11-10 | 4790-071-0955 | 4.29 ppm |
| 2015-11-17 | 4790-019-1030 | 4.97 ppm |
| 2015-11-17 | 4790-040-1235 | 2.94 ppm |
| 2015-12-02 | 4790-028-1218 | 0.474 ppm |
| 2015-12-03 | 4790-071-1050 | 4.30 ppm |
| 2015-12-09 | 4790-038-0955 | 1.40 ppm |
| 2015-12-09 | 4790-046-0925 | ND |
| 2016-01-12 | 4790-015-1015 | 2.80 ppm |
| 2016-01-12 | 4790-024-0840 | 4.90 ppm |
| 2016-01-12 | 4790-038-1100 | 1.50 ppm |
| 2016-01-12 | 4790-041-1030 | 2.90 ppm |
| 2016-01-12 | 4790-045-1005 | 2.30 ppm |
| 2016-01-12 | 4790-059-0940 | 2.40 ppm |
| 2016-01-13 | 4790-044-0900 | 4.10 ppm |
| 2016-01-14 | 4790-090-1040 | 0.500 ppm |
| 2016-01-20 | 4790-053-1140 | 3.20 ppm |
| 2016-01-20 | 4790-071-1100 | 3.70 ppm |
| 2016-01-20 | 4790-142-1030 | 0.500 ppm |
| 2016-02-03 | 4790-071-1220 | 3.50 ppm |
| 2016-02-05 | 4790-097-0845 | 0.450 ppm |
| 2016-02-17 | 4790-018-1245 | 4.70 ppm |
| 2016-02-29 | 4790-150-1830 | 0.360 ppm |
| 2016-03-02 | 4790-071-1035 | 3.80 ppm |
| 2016-03-03 | 4790-037-1047 | 0.510 ppm |
| 2016-03-15 | 4790-037-1200 | 0.760 ppm |
| 2016-04-05 | 4790-053-1110 | 3.20 ppm |
| 2016-04-14 | 4790-142-0000 | 0.430 ppm |
| 2016-04-14 | 4790-142-1100 | 0.440 ppm |
| 2016-04-20 | 4790-084-1145 | 0.640 ppm |
| 2016-04-20 | 4790-086-1215 | 0.260 ppm |
| 2016-04-21 | 4790-024-0930 | 5.10 ppm |
| 2016-04-21 | 4790-027-1015 | 1.90 ppm |
| 2016-04-21 | 4790-043-1115 | 0.420 ppm |
| 2016-04-21 | 4790-059-1045 | 2.80 ppm |
| 2016-04-22 | 4790-071-1030 | 4.10 ppm |
| 2016-05-04 | 4790-071-1445 | 3.90 ppm |
| 2016-05-10 | 4790-065-1225 | 3.90 ppm |
| 2016-05-11 | 4790-036-1230 | 0.440 ppm |
| 2016-05-12 | 4790-018-1240 | 4.50 ppm |
| 2016-06-07 | 4790-035-1020 | 0.470 ppm |
| 2016-06-07 | 4790-044-0954 | 4.00 ppm |
| 2016-06-07 | 4790-051-1055 | 0.630 ppm |
| 2016-06-07 | 4790-071-1110 | 4.20 ppm |
| 2016-06-30 | 4790-085-0945 | 0.570 ppm |
| 2016-07-06 | 4790-031-1115 | 0.280 ppm |
| 2016-07-12 | 4790-053-0945 | 3.00 ppm |
| 2016-07-13 | 4790-024-0845 | 4.20 ppm |
| 2016-07-13 | 4790-059-0945 | 2.60 ppm |
| 2016-07-20 | 4790-071-0845 | 3.90 ppm |
| 2016-07-21 | 4790-012-1246 | 2.40 ppm |
| 2016-07-25 | 4790-012-1230 | 2.40 ppm |
| 2016-07-27 | 4790-142-1130 | 0.250 ppm |
| 2016-08-02 | 4790-018-1210 | 4.40 ppm |
| 2016-08-02 | 4790-046-1000 | ND |
| 2016-08-02 | 4790-095-1025 | 0.210 ppm |
| 2016-08-03 | 4790-025-1040 | 2.80 ppm |
| 2016-08-03 | 4790-034-1145 | 0.890 ppm |
| 2016-08-04 | 4790-017-1115 | 0.450 ppm |
| 2016-08-04 | 4790-071-1130 | 4.10 ppm |
| 2016-09-08 | 4790-071-0910 | 3.80 ppm |
| 2016-10-05 | 4790-024-1115 | 4.20 ppm |
| 2016-10-05 | 4790-059-1200 | 2.50 ppm |
| 2016-10-06 | 4790-029-1110 | 1.90 ppm |
| 2016-10-18 | 4790-071-1040 | 3.80 ppm |
| 2016-10-19 | 4790-053-1040 | 4.70 ppm |
| 2016-11-02 | 4790-018-1225 | 4.90 ppm |
| 2016-11-02 | 4790-040-1150 | 3.10 ppm |
| 2016-11-02 | 4790-071-1300 | 3.90 ppm |
| 2016-11-03 | 4790-031-1111 | 0.610 ppm |
| 2016-11-09 | 4790-047-0910 | ND |
| 2016-11-09 | 4790-143-1015 | ND |
| 2016-11-09 | 4790-153-1110 | 0.280 ppm |
| 2016-11-22 | 4790-048-1005 | 0.450 ppm |
| 2016-12-06 | 4790-071-1148 | 3.80 ppm |
| 2017-01-04 | 4790-015-1015 | 3.80 ppm |
| 2017-01-04 | 4790-041-1100 | 3.80 ppm |
| 2017-01-17 | 4790-038-1210 | 1.30 ppm |
| 2017-01-17 | 4790-071-1125 | 3.60 ppm |
| 2017-01-18 | 4790-090-1120 | 0.270 ppm |
| 2017-01-25 | 4790-047-1000 | ND |
| 2017-01-26 | 4790-024-0900 | 4.30 ppm |
| 2017-01-26 | 4790-059-0930 | 2.40 ppm |
| 2017-02-02 | 4790-071-0930 | 3.60 ppm |
| 2017-02-02 | 4790-153-1050 | 0.230 ppm |
| 2017-02-03 | 4790-042-0950 | 1.60 ppm |
| 2017-02-03 | 4790-097-1015 | 0.420 ppm |
| 2017-02-03 | 4790-153-1050 | ND |
| 2017-02-14 | 4790-018-0940 | 4.10 ppm |
| 2017-03-08 | 4790-037-0932 | 0.690 ppm |
| 2017-03-09 | 4790-071-1105 | 3.40 ppm |
| 2017-03-23 | 4790-142-1055 | 0.210 ppm |
| 2017-03-29 | 4790-019-1112 | 6.50 ppm |
| 2017-04-06 | 4790-071-1154 | 3.50 ppm |
| 2017-04-11 | 4790-024-0904 | 4.90 ppm |
| 2017-04-11 | 4790-042-1045 | 1.30 ppm |
| 2017-04-11 | 4790-043-1000 | 0.310 ppm |
| 2017-04-11 | 4790-084-0940 | 0.280 ppm |
| 2017-04-11 | 4790-085-1040 | 0.280 ppm |
| 2017-04-12 | 4790-142-1030 | 0.220 ppm |
| 2017-04-19 | 4790-059-0950 | 2.90 ppm |
| 2017-04-20 | 4790-053-1115 | 3.90 ppm |
| 2017-04-27 | 4790-086-1025 | 0.270 ppm |
| 2017-05-02 | 4790-065-1125 | 4.00 ppm |
| 2017-05-03 | 4790-019-1020 | 6.30 ppm |
| 2017-05-03 | 4790-036-1105 | 0.290 ppm |
| 2017-05-03 | 4790-071-1040 | 3.60 ppm |
| 2017-05-04 | 4790-153-1010 | 0.250 ppm |
| 2017-05-10 | 4790-018-1110 | 5.00 ppm |
| 2017-05-14 | 4790-027-0830 | 2.20 ppm |
| 2017-06-07 | 4790-025-0920 | 2.60 ppm |
| 2017-06-08 | 4790-035-1100 | 0.530 ppm |
| 2017-06-08 | 4790-044-1125 | 3.10 ppm |
| 2017-06-08 | 4790-071-1115 | 3.40 ppm |
| 2017-06-14 | 4790-051-1130 | 0.600 ppm |
| 2017-06-15 | 4790-048-1053 | 0.390 ppm |
| 2017-07-11 | 4790-024-0945 | 5.10 ppm |
| 2017-07-11 | 4790-059-1033 | 3.00 ppm |
| 2017-07-11 | 4790-071-1045 | 3.60 ppm |
| 2017-07-13 | 4790-053-1125 | 3.50 ppm |
| 2017-07-13 | 4790-142-1035 | ND |
| 2017-08-04 | 4790-025-0940 | 2.70 ppm |
| 2017-08-04 | 4790-040-0845 | 3.10 ppm |
| 2017-08-04 | 4790-071-1115 | 3.30 ppm |
| 2017-08-09 | 4790-046-1035 | ND |
| 2017-08-09 | 4790-095-1000 | 0.240 ppm |
| 2017-08-10 | 4790-017-1005 | 0.590 ppm |
| 2017-08-10 | 4790-019-0955 | 6.50 ppm |
| 2017-08-10 | 4790-153-1215 | 0.390 ppm |
| 2017-08-15 | 4790-034-1023 | 0.950 ppm |
| 2017-08-16 | 4790-018-0925 | 5.20 ppm |
| 2017-09-01 | 4790-150-0930 | 0.360 ppm |
| 2017-09-28 | 4790-059-0943 | 2.90 ppm |
| 2017-10-10 | 4790-053-1134 | 3.60 ppm |
| 2017-10-10 | 4790-059-1031 | 2.70 ppm |
| 2017-10-11 | 4790-041-1107 | 3.30 ppm |
| 2017-10-11 | 4790-071-1037 | 2.80 ppm |
| 2017-10-12 | 4790-042-1243 | 1.10 ppm |
| 2017-10-17 | 4790-029-1101 | 1.90 ppm |
| 2017-10-19 | 4790-024-0932 | 5.50 ppm |
| 2017-10-19 | 4790-045-0915 | 1.50 ppm |
| 2017-11-01 | 4790-031-1107 | 0.330 ppm |
| 2017-11-08 | 4790-040-0925 | 3.00 ppm |
| 2017-11-08 | 4790-071-1143 | 2.70 ppm |
| 2017-11-08 | 4790-150-1445 | 0.410 ppm |
| 2017-11-09 | 4790-018-1255 | 4.70 ppm |
| 2017-11-09 | 4790-019-1110 | 6.30 ppm |
| 2017-11-09 | 4790-143-1145 | 0.260 ppm |
| 2017-11-22 | 4790-151-1100 | ND |
| 2017-11-29 | 4790-012-0935 | 2.50 ppm |
| 2017-12-06 | 4790-071-1020 | 3.20 ppm |
| 2017-12-13 | 4790-019-1038 | 6.60 ppm |
| 2018-01-04 | 4790-142-1242 | 0.260 ppm |
| 2018-01-05 | 4790-015-1011 | 2.60 ppm |
| 2018-01-05 | 4790-041-1142 | 3.50 ppm |
| 2018-01-05 | 4790-053-0928 | 3.30 ppm |
| 2018-01-05 | 4790-071-1055 | 2.50 ppm |
| 2018-01-12 | 4790-038-0752 | 1.30 ppm |
| 2018-01-17 | 4790-024-0908 | 5.40 ppm |
| 2018-01-17 | 4790-059-0957 | 2.40 ppm |
| 2018-01-17 | 4790-090-1202 | 0.280 ppm |
| 2018-01-18 | 4790-045-1218 | 2.40 ppm |
| 2018-02-06 | 4790-153-1042 | 0.420 ppm |
| 2018-02-07 | 4790-034-0923 | 0.970 ppm |
| 2018-02-07 | 4790-150-1242 | 0.480 ppm |
| 2018-02-07 | 4790-151-1148 | 0.380 ppm |
| 2018-02-08 | 4790-097-0957 | 0.510 ppm |
| 2018-02-15 | 4790-018-0933 | 5.00 ppm |
| 2018-02-15 | 4790-071-0857 | 1.90 ppm |
| 2018-03-07 | 4790-035-1050 | 0.460 ppm |
| 2018-03-07 | 4790-037-1035 | 0.580 ppm |
| 2018-03-15 | 4790-018-1125 | 5.10 ppm |
| 2018-03-15 | 4790-027-0947 | 2.00 ppm |
| 2018-03-15 | 4790-048-1057 | 0.370 ppm |
| 2018-03-15 | 4790-071-0940 | 1.50 ppm |
| 2018-04-09 | 4790-043-1055 | ND |
| 2018-04-11 | 4790-059-1140 | 3.00 ppm |
| 2018-04-11 | 4790-071-1125 | 2.80 ppm |
| 2018-04-12 | 4790-084-1150 | 0.260 ppm |
| 2018-04-12 | 4790-086-1115 | 0.230 ppm |
| 2018-04-13 | 4790-017-1000 | 0.560 ppm |
| 2018-04-13 | 4790-024-1040 | 5.60 ppm |
| 2018-04-13 | 4790-053-1200 | 3.70 ppm |
| 2018-04-13 | 4790-053-1205 | 3.70 ppm |
| 2018-04-25 | 4790-152-1135 | 0.910 ppm |
| 2018-05-03 | 4790-051-1020 | 0.650 ppm |
| 2018-05-03 | 4790-150-1130 | 0.550 ppm |
| 2018-05-03 | 4790-151-1235 | 0.240 ppm |
| 2018-05-04 | 4790-048-0924 | 0.460 ppm |
| 2018-05-04 | 4790-071-1057 | 3.00 ppm |
| 2018-05-09 | 4790-065-1159 | 3.80 ppm |
| 2018-05-15 | 4790-036-1055 | 0.390 ppm |
| 2018-05-18 | 4790-097-0918 | 0.510 ppm |
| 2018-05-22 | 4790-018-1013 | 5.10 ppm |
| 2018-05-23 | 4790-047-1004 | ND |
| 2018-06-07 | 4790-045-1100 | 1.20 ppm |
| 2018-06-12 | 4790-035-0935 | 0.480 ppm |
| 2018-06-12 | 4790-044-1120 | 3.10 ppm |
| 2018-06-12 | 4790-071-1045 | 2.80 ppm |
| 2018-07-02 | 4790-012-1036 | 2.70 ppm |
| 2018-07-11 | 4790-024-1010 | 6.00 ppm |
| 2018-07-11 | 4790-059-0950 | 3.00 ppm |
| 2018-07-12 | 4790-071-1134 | 3.10 ppm |
| 2018-07-17 | 4790-152-1045 | 2.80 ppm |
| 2018-07-18 | 4790-015-0901 | 4.10 ppm |
| 2018-08-08 | 4790-085-0945 | 0.290 ppm |
| 2018-08-09 | 4790-034-1220 | 0.990 ppm |
| 2018-08-09 | 4790-151-1000 | ND |
| 2018-08-14 | 4790-095-1152 | ND |
| 2018-08-14 | 4790-150-0914 | 0.420 ppm |
| 2018-08-15 | 4790-017-1214 | 0.440 ppm |
| 2018-08-15 | 4790-025-0952 | 2.70 ppm |
| 2018-08-15 | 4790-027-1029 | 1.90 ppm |
| 2018-08-15 | 4790-071-1158 | 3.30 ppm |
| 2018-08-28 | 4790-018-1005 | 5.20 ppm |
| 2018-09-11 | 4790-071-0855 | 3.70 ppm |
| 2018-09-12 | 4790-046-0945 | ND |
| 2018-09-13 | 4790-051-1035 | 0.780 ppm |
| 2018-09-25 | 4790-155-1123 | 3.50 ppm |
| 2018-10-03 | 4790-152-1030 | 2.70 ppm |
| 2018-10-05 | 4790-024-0850 | 6.10 ppm |
| 2018-10-05 | 4790-042-0925 | 1.70 ppm |
| 2018-10-05 | 4790-059-0755 | 2.80 ppm |
| 2018-10-11 | 4790-029-0947 | 2.30 ppm |
| 2018-10-11 | 4790-071-1007 | 3.60 ppm |
| 2018-10-16 | 4790-065-0900 | 3.60 ppm |
| 2018-10-17 | 4790-155-1240 | 3.10 ppm |
| 2018-11-06 | 4790-150-0957 | 0.800 ppm |
| 2018-11-06 | 4790-151-1116 | ND |
| 2018-11-07 | 4790-018-1118 | 5.50 ppm |
| 2018-11-09 | 4790-031-1124 | ND |
| 2018-11-15 | 4790-040-1244 | 3.60 ppm |
| 2018-11-15 | 4790-071-1208 | 3.90 ppm |
| 2018-11-27 | 4790-143-0946 | ND |
| 2018-12-11 | 4790-071-0930 | 3.00 ppm |
| 2018-12-14 | 4790-038-0815 | 1.40 ppm |
| 2018-12-17 | 4790-046-1210 | ND |
| 2019-01-03 | 4790-071-1310 | 3.50 ppm |
| 2019-01-03 | 4790-142-1220 | ND |
| 2019-01-08 | 4790-024-1020 | 5.80 ppm |
| 2019-01-08 | 4790-059-1110 | 2.90 ppm |
| 2019-01-09 | 4790-038-0845 | 1.50 ppm |
| 2019-01-09 | 4790-152-1100 | 1.90 ppm |
| 2019-01-09 | 4790-155-0930 | 2.80 ppm |
| 2019-01-10 | 4790-090-1135 | ND |
| 2019-01-15 | 4790-015-1045 | 3.00 ppm |
| 2019-01-15 | 4790-041-0940 | 4.10 ppm |
| 2019-01-15 | 4790-045-1030 | 2.00 ppm |
| 2019-01-22 | 4790-047-0900 | ND |
| 2019-02-12 | 4790-018-1025 | 5.20 ppm |
| 2019-02-12 | 4790-153-1201 | ND |
| 2019-02-19 | 4790-071-1130 | 2.60 ppm |
| 2019-02-19 | 4790-097-1227 | 0.450 ppm |
| 2019-02-19 | 4790-150-0958 | 0.540 ppm |
| 2019-02-19 | 4790-151-0841 | ND |
| 2019-03-12 | 4790-027-0910 | 2.20 ppm |
| 2019-03-12 | 4790-071-1015 | 2.10 ppm |
| 2019-03-26 | 4790-037-0950 | 0.530 ppm |
| 2019-04-02 | 4790-059-1011 | 2.80 ppm |
| 2019-04-02 | 4790-155-1115 | 1.90 ppm |
| 2019-04-04 | 4790-043-0855 | ND |
| 2019-04-04 | 4790-071-1009 | 1.80 ppm |
| 2019-04-05 | 4790-084-1020 | ND |
| 2019-04-05 | 4790-085-1004 | ND |
| 2019-04-05 | 4790-086-0952 | ND |
| 2019-04-29 | 4790-024-1018 | 5.70 ppm |
| 2019-05-01 | 4790-036-1015 | ND |
| 2019-05-02 | 4790-018-1154 | 5.50 ppm |
| 2019-05-02 | 4790-048-1057 | ND |
| 2019-05-07 | 4790-012-0831 | 2.60 ppm |
| 2019-05-07 | 4790-065-1034 | 3.60 ppm |
| 2019-05-07 | 4790-071-0939 | 3.60 ppm |
| 2019-05-15 | 4790-044-0955 | 4.80 ppm |
| 2019-06-05 | 4790-035-0945 | ND |
| 2019-06-05 | 4790-051-1020 | ND |
| 2019-06-18 | 4790-044-1000 | 3.40 ppm |
| 2019-06-18 | 4790-071-0930 | 3.60 ppm |
| 2019-07-01 | 4790-012-0900 | 2.50 ppm |
| 2019-07-01 | 4790-031-1052 | ND |
| 2019-07-03 | 4790-071-1140 | 4.10 ppm |
| 2019-07-10 | 4790-059-0900 | 2.50 ppm |
| 2019-07-22 | 4790-155-0820 | 2.50 ppm |
| 2019-07-24 | 4790-024-0832 | 6.50 ppm |
| 2019-08-09 | 4790-017-0946 | 0.570 ppm |
| 2019-08-09 | 4790-071-1010 | 4.10 ppm |
| 2019-08-14 | 4790-025-0849 | 3.20 ppm |
| 2019-08-14 | 4790-034-0931 | 0.880 ppm |
| 2019-08-20 | 4790-018-1042 | 5.30 ppm |
| 2019-08-21 | 4790-095-0805 | ND |
| 2019-08-26 | 4790-046-0958 | ND |
| 2019-09-05 | 4790-071-0940 | 4.50 ppm |
| 2019-10-02 | 4790-042-1055 | 0.890 ppm |
| 2019-10-04 | 4790-071-0925 | 4.30 ppm |
| 2019-10-09 | 4790-024-0822 | 4.40 ppm |
| 2019-10-09 | 4790-059-0901 | 2.80 ppm |
| 2019-11-06 | 4790-031-0940 | ND |
| 2019-11-07 | 4790-018-1118 | 5.20 ppm |
| 2019-11-08 | 4790-040-1032 | 3.30 ppm |
| 2019-11-14 | 4790-071-1049 | 4.20 ppm |
| 2019-11-14 | 4790-143-1040 | ND |
| 2019-12-10 | 4790-071-1015 | 3.50 ppm |