Decatur (Clifton Spgs Rd) GA, US: 33.6906, -84.2731
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 21, 2021, 7 p.m. | 3.4 ppb (4) | 0.6 ppb (1) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.19 ppb (3) | N/A | N/A | 37.0 | |
| April 21, 2021, 6 p.m. | 3.6 ppb (4) | 0.7 ppb (1) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | N/A | 15.4 μg/m3 (15) | 3.9 μg/m3 (17) | 37.0 | |
| April 21, 2021, 5 p.m. | 4.0 ppb (4) | 0.8 ppb (1) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | N/A | 18.0 μg/m3 (17) | 4.8 μg/m3 (20) | 36.0 | |
| April 21, 2021, 4 p.m. | 3.6 ppb (4) | 0.7 ppb (1) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | N/A | 17.8 μg/m3 (17) | 6.7 μg/m3 (28) | 35.0 | |
| April 21, 2021, 3 p.m. | 4.5 ppb (5) | 1.0 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | N/A | 23.7 μg/m3 (22) | 7.3 μg/m3 (31) | 32.0 | |
| April 21, 2021, 2 p.m. | 6.3 ppb (6) | 1.5 ppb (2) | 7.0 ppb (7) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.18 ppb (3) | 24.5 μg/m3 (23) | 8.4 μg/m3 (36) | 36.0 | |
| April 21, 2021, 1 p.m. | 7.2 ppb (7) | 1.5 ppb (2) | 8.0 ppb (8) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.19 ppb (3) | 26.7 μg/m3 (25) | 11.6 μg/m3 (49) | 49.0 | |
| April 21, 2021, noon | 7.6 ppb (8) | 0.9 ppb (1) | 8.0 ppb (8) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.21 ppb (3) | 29.8 μg/m3 (28) | 14.5 μg/m3 (57) | 57.0 | |
| April 21, 2021, 11 a.m. | 16.4 ppb (16) | 2.9 ppb (3) | 15.0 ppb (15) | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 16.0 ppb (15) | 0.28 ppb (4) | 26.4 μg/m3 (25) | 18.2 μg/m3 (64) | 64.0 | |
| April 21, 2021, 10 a.m. | 38.5 ppb (37) | 17.2 ppb (17) | 32.0 ppb (31) | 21.0 ppb (20) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.36 ppb (5) | 26.7 μg/m3 (25) | 18.5 μg/m3 (65) | 65.0 | |
| April 21, 2021, 9 a.m. | 49.7 ppb (47) | 31.8 ppb (30) | 48.0 ppb (46) | 18.0 ppb (17) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | N/A | 27.0 μg/m3 (25) | 19.8 μg/m3 (68) | 68.0 | |
| April 21, 2021, 8 a.m. | 39.1 ppb (37) | 20.7 ppb (20) | 45.0 ppb (43) | 18.0 ppb (17) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | N/A | 28.6 μg/m3 (27) | 21.6 μg/m3 (71) | 71.0 | |
| April 21, 2021, 7 a.m. | 28.4 ppb (27) | 6.6 ppb (7) | 27.0 ppb (26) | 22.0 ppb (21) | N/A | -1.0 ppb (0) | 1.0 ppb (1) | 0.39 ppb (5) | 29.8 μg/m3 (28) | 22.3 μg/m3 (73) | 73.0 | |
| April 21, 2021, 6 a.m. | 62.1 ppb (60) | 36.9 ppb (35) | 65.0 ppb (63) | 25.0 ppb (24) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.57 ppb (7) | 31.8 μg/m3 (30) | 24.7 μg/m3 (78) | 78.0 | |
| April 21, 2021, 5 a.m. | 81.1 ppb (80) | 52.8 ppb (50) | 90.0 ppb (90) | 28.0 ppb (27) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.63 ppb (7) | 32.0 μg/m3 (30) | 23.8 μg/m3 (76) | 90.0 | |
| April 21, 2021, 4 a.m. | 92.0 ppb (92) | 63.9 ppb (62) | 104.0 ppb (102) | 28.0 ppb (27) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.72 ppb (8) | N/A | N/A | 102.0 | |
| April 21, 2021, 3 a.m. | 88.5 ppb (88) | 56.0 ppb (54) | 104.0 ppb (102) | 33.0 ppb (32) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.77 ppb (10) | 34.0 μg/m3 (32) | 23.6 μg/m3 (76) | 102.0 | |
| April 21, 2021, 2 a.m. | 34.5 ppb (33) | 7.6 ppb (8) | 46.0 ppb (44) | 27.0 ppb (26) | N/A | 0.0 ppb (0) | 7.0 ppb (7) | 0.45 ppb (6) | 31.5 μg/m3 (30) | 25.1 μg/m3 (79) | 79.0 | |
| April 21, 2021, 1 a.m. | 11.1 ppb (11) | -0.1 ppb (0) | 14.0 ppb (14) | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.29 ppb (4) | 29.1 μg/m3 (27) | 20.9 μg/m3 (70) | 70.0 | |
| April 21, 2021, midnight | 3.3 ppb (4) | -0.1 ppb (0) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.21 ppb (3) | 25.9 μg/m3 (24) | 18.3 μg/m3 (65) | 65.0 | |
| April 20, 2021, 11 p.m. | 2.5 ppb (3) | -0.1 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 51.0 ppb (48) | 0.2 ppb (3) | 27.5 μg/m3 (26) | 18.7 μg/m3 (65) | 65.0 | |
| April 20, 2021, 10 p.m. | 2.0 ppb (2) | -0.1 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 55.0 ppb (51) | 0.19 ppb (3) | 30.4 μg/m3 (29) | 21.7 μg/m3 (72) | 72.0 | |
| April 20, 2021, 9 p.m. | 2.2 ppb (3) | 0.0 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 58.0 ppb (61) | 0.19 ppb (3) | 31.7 μg/m3 (30) | 22.1 μg/m3 (73) | 73.0 | |
| April 20, 2021, 8 p.m. | 2.5 ppb (3) | 0.0 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 59.0 ppb (65) | 0.17 ppb (3) | 22.7 μg/m3 (22) | 13.9 μg/m3 (55) | 65.0 | |
| April 20, 2021, 7 p.m. | 2.4 ppb (3) | 0.0 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 57.0 ppb (58) | 0.16 ppb (3) | 19.9 μg/m3 (19) | 11.5 μg/m3 (48) | 58.0 | |
| April 20, 2021, 6 p.m. | 2.6 ppb (3) | 0.1 ppb (1) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 56.0 ppb (55) | 0.17 ppb (3) | 20.7 μg/m3 (20) | 11.6 μg/m3 (49) | 55.0 | |
| April 20, 2021, 5 p.m. | 2.9 ppb (3) | 0.2 ppb (1) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 53.0 ppb (50) | 0.18 ppb (3) | 22.1 μg/m3 (21) | 11.5 μg/m3 (48) | 50.0 | |
| April 20, 2021, 4 p.m. | 5.3 ppb (5) | 0.8 ppb (1) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.22 ppb (3) | 18.4 μg/m3 (18) | 9.7 μg/m3 (41) | 41.0 | |
| April 20, 2021, 3 p.m. | 9.0 ppb (9) | 1.9 ppb (2) | 10.0 ppb (10) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.25 ppb (3) | 16.3 μg/m3 (16) | 8.5 μg/m3 (36) | 36.0 | |
| April 20, 2021, 2 p.m. | 60.5 ppb (58) | 40.1 ppb (38) | 63.0 ppb (61) | 20.0 ppb (19) | N/A | 0.0 ppb (0) | 4.0 ppb (4) | 0.61 ppb (7) | 25.1 μg/m3 (24) | 13.4 μg/m3 (54) | 61.0 | |
| April 20, 2021, 1 p.m. | 75.6 ppb (75) | 60.6 ppb (59) | 80.0 ppb (79) | 15.0 ppb (15) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.66 ppb (8) | 23.8 μg/m3 (23) | 15.0 μg/m3 (58) | 79.0 | |
| April 20, 2021, noon | 65.7 ppb (64) | 55.6 ppb (53) | 77.0 ppb (76) | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.61 ppb (7) | 21.8 μg/m3 (21) | 15.1 μg/m3 (58) | 76.0 | |
| April 20, 2021, 11 a.m. | 62.4 ppb (60) | 49.8 ppb (47) | 69.0 ppb (67) | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.58 ppb (7) | 20.3 μg/m3 (19) | 15.3 μg/m3 (58) | 67.0 | |
| April 20, 2021, 10 a.m. | 59.3 ppb (57) | 47.3 ppb (45) | 63.0 ppb (61) | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.55 ppb (7) | 20.7 μg/m3 (20) | 15.3 μg/m3 (58) | 61.0 | |
| April 20, 2021, 9 a.m. | 48.3 ppb (46) | 34.2 ppb (33) | 52.0 ppb (50) | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.51 ppb (6) | 21.8 μg/m3 (21) | 15.7 μg/m3 (59) | 59.0 | |
| April 20, 2021, 8 a.m. | 35.3 ppb (34) | 19.6 ppb (19) | 38.0 ppb (36) | 16.0 ppb (16) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.47 ppb (6) | 23.0 μg/m3 (22) | 15.5 μg/m3 (59) | 59.0 | |
| April 20, 2021, 7 a.m. | 35.1 ppb (34) | 15.9 ppb (15) | 37.0 ppb (35) | 19.0 ppb (18) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.46 ppb (6) | 23.3 μg/m3 (22) | 15.6 μg/m3 (59) | 59.0 | |
| April 20, 2021, 6 a.m. | 37.2 ppb (36) | 15.4 ppb (15) | 39.0 ppb (37) | 22.0 ppb (21) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.47 ppb (6) | 23.1 μg/m3 (22) | 14.7 μg/m3 (57) | 57.0 | |
| April 20, 2021, 5 a.m. | 56.6 ppb (54) | 32.3 ppb (31) | 61.0 ppb (59) | 24.0 ppb (23) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.53 ppb (6) | 21.4 μg/m3 (20) | 13.7 μg/m3 (55) | 59.0 | |
| April 20, 2021, 4 a.m. | 52.6 ppb (50) | 23.1 ppb (22) | 59.0 ppb (57) | 30.0 ppb (29) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.51 ppb (6) | N/A | N/A | 57.0 | |
| April 20, 2021, 3 a.m. | 40.2 ppb (38) | 9.8 ppb (10) | 47.0 ppb (45) | 30.0 ppb (29) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.45 ppb (6) | 18.5 μg/m3 (18) | 11.9 μg/m3 (50) | 50.0 | |
| April 20, 2021, 2 a.m. | 31.5 ppb (30) | 1.1 ppb (2) | 37.0 ppb (35) | 31.0 ppb (30) | N/A | N/A | 4.0 ppb (4) | 0.4 ppb (5) | 15.5 μg/m3 (15) | 10.2 μg/m3 (43) | 43.0 | |
| April 20, 2021, 1 a.m. | 25.2 ppb (24) | 0.1 ppb (1) | 30.0 ppb (29) | 25.0 ppb (24) | N/A | N/A | 16.0 ppb (15) | 0.35 ppb (4) | 16.3 μg/m3 (16) | 10.3 μg/m3 (43) | 43.0 | |
| April 20, 2021, midnight | 13.9 ppb (14) | -0.1 ppb (0) | 15.0 ppb (15) | 14.0 ppb (14) | N/A | N/A | 34.0 ppb (32) | 0.26 ppb (4) | 14.8 μg/m3 (14) | 9.4 μg/m3 (40) | 40.0 | |
| April 19, 2021, 11 p.m. | 6.7 ppb (7) | 0.0 ppb (0) | 8.0 ppb (8) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.2 ppb (3) | 15.5 μg/m3 (15) | 9.3 μg/m3 (39) | 40.0 | |
| April 19, 2021, 10 p.m. | 4.6 ppb (5) | 0.2 ppb (1) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.19 ppb (3) | 17.2 μg/m3 (16) | 9.6 μg/m3 (40) | 47.0 | |
| April 19, 2021, 9 p.m. | 3.8 ppb (4) | 0.2 ppb (1) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 54.0 ppb (50) | 0.17 ppb (3) | 15.8 μg/m3 (15) | 9.3 μg/m3 (39) | 50.0 | |
| April 19, 2021, 8 p.m. | 4.2 ppb (4) | 0.4 ppb (1) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 52.0 ppb (49) | 0.17 ppb (3) | 16.1 μg/m3 (15) | 8.2 μg/m3 (35) | 49.0 | |
| April 19, 2021, 7 p.m. | 3.6 ppb (4) | 0.3 ppb (1) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.17 ppb (3) | 16.4 μg/m3 (16) | 8.4 μg/m3 (36) | 47.0 | |
| April 19, 2021, 6 p.m. | 3.6 ppb (4) | 0.3 ppb (1) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | -1.0 ppb (0) | 49.0 ppb (46) | 0.17 ppb (3) | 17.4 μg/m3 (17) | 8.5 μg/m3 (36) | 46.0 | |
| April 19, 2021, 5 p.m. | 3.8 ppb (4) | 0.5 ppb (1) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.17 ppb (3) | 16.8 μg/m3 (16) | 8.8 μg/m3 (37) | 43.0 | |
| April 19, 2021, 4 p.m. | 4.2 ppb (4) | 0.6 ppb (1) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.17 ppb (3) | 15.7 μg/m3 (15) | 8.3 μg/m3 (35) | 39.0 | |
| April 19, 2021, 3 p.m. | 5.3 ppb (5) | 1.0 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.17 ppb (3) | 17.3 μg/m3 (17) | 8.2 μg/m3 (35) | 36.0 | |
| April 19, 2021, 2 p.m. | 5.9 ppb (6) | 1.2 ppb (2) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.18 ppb (3) | 16.2 μg/m3 (15) | 8.5 μg/m3 (36) | 36.0 | |
| April 19, 2021, 1 p.m. | 9.1 ppb (9) | 1.9 ppb (2) | 10.0 ppb (10) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.2 ppb (3) | 16.5 μg/m3 (16) | 9.2 μg/m3 (39) | 39.0 | |
| April 19, 2021, noon | 9.7 ppb (10) | 1.3 ppb (2) | 10.0 ppb (10) | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.2 ppb (3) | 15.3 μg/m3 (15) | 9.4 μg/m3 (40) | 40.0 | |
| April 19, 2021, 11 a.m. | 9.0 ppb (9) | 0.2 ppb (1) | 10.0 ppb (10) | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.2 ppb (3) | 14.0 μg/m3 (13) | 9.7 μg/m3 (41) | 41.0 | |
| April 19, 2021, 10 a.m. | 5.6 ppb (6) | -0.2 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.18 ppb (3) | 13.9 μg/m3 (13) | 9.8 μg/m3 (41) | 41.0 | |
| April 19, 2021, 9 a.m. | 4.0 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.17 ppb (3) | 14.7 μg/m3 (14) | 10.2 μg/m3 (43) | 43.0 | |
| April 19, 2021, 8 a.m. | 4.4 ppb (5) | -0.2 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | 0.17 ppb (3) | 15.3 μg/m3 (15) | 11.1 μg/m3 (47) | 47.0 | |
| April 19, 2021, 7 a.m. | 3.4 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 14.8 μg/m3 (14) | 10.8 μg/m3 (46) | 46.0 | |
| April 19, 2021, 6 a.m. | 2.9 ppb (3) | -0.2 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.17 ppb (3) | 15.0 μg/m3 (14) | 10.6 μg/m3 (45) | 45.0 | |
| April 19, 2021, 5 a.m. | 2.4 ppb (3) | -0.2 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | -1.0 ppb (0) | 35.0 ppb (33) | 0.17 ppb (3) | 14.7 μg/m3 (14) | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, 4 a.m. | 2.9 ppb (3) | -0.2 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | -1.0 ppb (0) | 35.0 ppb (33) | 0.18 ppb (3) | N/A | N/A | 33.0 | |
| April 19, 2021, 3 a.m. | 4.8 ppb (5) | -0.1 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | N/A | 32.0 ppb (30) | 0.21 ppb (3) | 15.6 μg/m3 (15) | 9.8 μg/m3 (41) | 41.0 | |
| April 19, 2021, 2 a.m. | 8.1 ppb (8) | -0.1 ppb (0) | 7.0 ppb (7) | 8.0 ppb (8) | N/A | -1.0 ppb (0) | 26.0 ppb (25) | 0.25 ppb (3) | 15.0 μg/m3 (14) | 9.7 μg/m3 (41) | 41.0 | |
| April 19, 2021, 1 a.m. | 9.6 ppb (10) | -0.1 ppb (0) | 12.0 ppb (12) | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.27 ppb (4) | 14.2 μg/m3 (14) | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, midnight | 4.8 ppb (5) | -0.1 ppb (0) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.21 ppb (3) | 14.4 μg/m3 (14) | 9.2 μg/m3 (39) | 39.0 | |
| April 18, 2021, 11 p.m. | 3.2 ppb (4) | -0.1 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | -1.0 ppb (0) | 43.0 ppb (40) | 0.19 ppb (3) | 14.6 μg/m3 (14) | 8.0 μg/m3 (34) | 40.0 | |
| April 18, 2021, 10 p.m. | 2.7 ppb (3) | 0.0 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | N/A | 47.0 ppb (44) | 0.18 ppb (3) | 12.8 μg/m3 (12) | 7.6 μg/m3 (32) | 44.0 | |
| April 18, 2021, 9 p.m. | 2.4 ppb (3) | 0.1 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 49.0 ppb (46) | 0.17 ppb (3) | 14.1 μg/m3 (14) | 7.4 μg/m3 (31) | 46.0 | |
| April 18, 2021, 8 p.m. | 2.1 ppb (2) | 0.0 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 51.0 ppb (48) | 0.16 ppb (3) | 13.7 μg/m3 (13) | 7.3 μg/m3 (31) | 48.0 | |
| April 18, 2021, 7 p.m. | 2.2 ppb (3) | 0.1 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 51.0 ppb (48) | 0.17 ppb (3) | 13.6 μg/m3 (13) | 7.6 μg/m3 (32) | 48.0 | |
| April 18, 2021, 6 p.m. | 2.1 ppb (2) | 0.0 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 52.0 ppb (49) | 0.17 ppb (3) | 13.1 μg/m3 (13) | 7.8 μg/m3 (33) | 49.0 | |
| April 18, 2021, 5 p.m. | 2.6 ppb (3) | 0.1 ppb (1) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.17 ppb (3) | 12.4 μg/m3 (12) | 7.3 μg/m3 (31) | 47.0 | |
| April 18, 2021, 4 p.m. | 3.0 ppb (3) | 0.3 ppb (1) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.17 ppb (3) | 11.5 μg/m3 (11) | 6.7 μg/m3 (28) | 43.0 | |
| April 18, 2021, 3 p.m. | 2.1 ppb (2) | 0.1 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | -1.0 ppb (0) | 44.0 ppb (41) | 0.17 ppb (3) | 11.4 μg/m3 (11) | 6.6 μg/m3 (28) | 41.0 | |
| April 18, 2021, 2 p.m. | 3.8 ppb (4) | 0.6 ppb (1) | 4.0 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.19 ppb (3) | 12.7 μg/m3 (12) | 8.1 μg/m3 (34) | 35.0 | |
| April 18, 2021, 1 p.m. | 4.5 ppb (5) | 0.6 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.19 ppb (3) | 13.0 μg/m3 (13) | 8.0 μg/m3 (34) | 34.0 | |
| April 18, 2021, noon | 4.6 ppb (5) | 0.3 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 26.0 ppb (25) | 0.2 ppb (3) | 13.2 μg/m3 (13) | 8.2 μg/m3 (35) | 35.0 | |
| April 18, 2021, 11 a.m. | 4.3 ppb (5) | 0.0 ppb (0) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 19.0 ppb (18) | 0.2 ppb (3) | 12.7 μg/m3 (12) | 7.9 μg/m3 (33) | 33.0 | |
| April 18, 2021, 10 a.m. | 4.4 ppb (5) | -0.2 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | -1.0 ppb (0) | 23.0 ppb (22) | 0.2 ppb (3) | 14.0 μg/m3 (13) | 8.2 μg/m3 (35) | 35.0 | |
| April 18, 2021, 9 a.m. | 4.6 ppb (5) | -0.2 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | -1.0 ppb (0) | 24.0 ppb (23) | N/A | 13.0 μg/m3 (13) | 7.7 μg/m3 (33) | 33.0 | |
| April 18, 2021, 8 a.m. | 3.7 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 27.0 ppb (25) | N/A | 13.9 μg/m3 (13) | 7.8 μg/m3 (33) | 33.0 | |
| April 18, 2021, 7 a.m. | 4.0 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | N/A | 25.0 ppb (24) | 0.22 ppb (3) | 12.1 μg/m3 (12) | 7.5 μg/m3 (32) | 32.0 | |
| April 18, 2021, 6 a.m. | 3.6 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 29.0 ppb (27) | 0.21 ppb (3) | 11.9 μg/m3 (12) | 7.4 μg/m3 (31) | 31.0 | |
| April 18, 2021, 5 a.m. | 4.1 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.22 ppb (3) | 13.0 μg/m3 (13) | 7.5 μg/m3 (32) | 32.0 | |
| April 18, 2021, 4 a.m. | 4.8 ppb (5) | -0.1 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.24 ppb (3) | N/A | N/A | 29.0 | |
| April 18, 2021, 3 a.m. | 6.1 ppb (6) | -0.1 ppb (0) | 7.0 ppb (7) | 6.0 ppb (6) | N/A | -1.0 ppb (0) | 30.0 ppb (28) | 0.25 ppb (3) | 13.9 μg/m3 (13) | 7.7 μg/m3 (33) | 33.0 | |
| April 18, 2021, 2 a.m. | 6.1 ppb (6) | -0.1 ppb (0) | 8.0 ppb (8) | 6.0 ppb (6) | N/A | -1.0 ppb (0) | 33.0 ppb (31) | 0.24 ppb (3) | 13.1 μg/m3 (13) | 7.7 μg/m3 (33) | 33.0 | |
| April 18, 2021, 1 a.m. | 7.0 ppb (7) | -0.2 ppb (0) | 8.0 ppb (8) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.27 ppb (4) | 14.6 μg/m3 (14) | 8.6 μg/m3 (36) | 36.0 | |
| April 18, 2021, midnight | 7.5 ppb (8) | -0.1 ppb (0) | 8.0 ppb (8) | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.27 ppb (4) | 14.6 μg/m3 (14) | 8.0 μg/m3 (34) | 37.0 | |
| April 17, 2021, 11 p.m. | 3.5 ppb (4) | -0.1 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 48.0 ppb (45) | 0.21 ppb (3) | 14.3 μg/m3 (14) | 7.5 μg/m3 (32) | 45.0 | |
| April 17, 2021, 10 p.m. | 2.4 ppb (3) | 0.0 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.19 ppb (3) | 14.5 μg/m3 (14) | 7.0 μg/m3 (30) | 47.0 | |
| April 17, 2021, 9 p.m. | 2.7 ppb (3) | 0.1 ppb (1) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.19 ppb (3) | 13.3 μg/m3 (13) | 6.8 μg/m3 (29) | 47.0 | |
| April 17, 2021, 8 p.m. | 2.7 ppb (3) | 0.1 ppb (1) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 48.0 ppb (45) | 0.19 ppb (3) | 16.7 μg/m3 (16) | 8.1 μg/m3 (34) | 45.0 | |
| April 17, 2021, 7 p.m. | 3.6 ppb (4) | 0.2 ppb (1) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 49.0 ppb (46) | 0.19 ppb (3) | 15.1 μg/m3 (14) | 7.9 μg/m3 (33) | 46.0 | |
| April 17, 2021, 6 p.m. | 5.0 ppb (5) | 0.5 ppb (1) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.2 ppb (3) | 15.2 μg/m3 (15) | 7.6 μg/m3 (32) | 47.0 | |
| April 17, 2021, 5 p.m. | 8.6 ppb (9) | 1.4 ppb (2) | 9.0 ppb (9) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.21 ppb (3) | 15.1 μg/m3 (14) | 7.1 μg/m3 (30) | 38.0 | |
| April 17, 2021, 4 p.m. | 6.7 ppb (7) | 1.2 ppb (2) | 7.0 ppb (7) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.21 ppb (3) | 14.2 μg/m3 (14) | 7.0 μg/m3 (30) | 38.0 | |
| April 17, 2021, 3 p.m. | 4.6 ppb (5) | 0.5 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.2 ppb (3) | 12.2 μg/m3 (12) | 6.4 μg/m3 (27) | 36.0 | |
| April 17, 2021, 2 p.m. | 10.4 ppb (10) | 2.3 ppb (3) | 11.0 ppb (11) | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.28 ppb (4) | 21.0 μg/m3 (20) | 10.5 μg/m3 (44) | 44.0 | |
| April 17, 2021, 1 p.m. | 22.4 ppb (22) | 10.3 ppb (10) | 24.0 ppb (23) | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 5.0 ppb (5) | 0.38 ppb (5) | 21.1 μg/m3 (20) | 12.0 μg/m3 (50) | 50.0 | |
| April 17, 2021, noon | 23.7 ppb (23) | 12.2 ppb (12) | 26.0 ppb (25) | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.38 ppb (5) | 20.8 μg/m3 (20) | 12.1 μg/m3 (51) | 51.0 | |
| April 17, 2021, 11 a.m. | 14.2 ppb (14) | 2.8 ppb (3) | 17.0 ppb (17) | 12.0 ppb (12) | N/A | N/A | 0.0 ppb (0) | 0.32 ppb (4) | 20.3 μg/m3 (19) | 12.5 μg/m3 (52) | 52.0 | |
| April 17, 2021, 10 a.m. | 14.9 ppb (15) | 1.5 ppb (2) | 17.0 ppb (17) | 14.0 ppb (14) | N/A | -1.0 ppb (0) | 0.0 ppb (0) | 0.31 ppb (4) | 20.2 μg/m3 (19) | 12.2 μg/m3 (52) | 52.0 | |
| April 17, 2021, 9 a.m. | 16.4 ppb (16) | 0.9 ppb (1) | 18.0 ppb (17) | 16.0 ppb (16) | N/A | -1.0 ppb (0) | 1.0 ppb (1) | 0.32 ppb (4) | 19.6 μg/m3 (19) | 12.5 μg/m3 (52) | 52.0 | |
| April 17, 2021, 8 a.m. | 12.1 ppb (12) | 0.5 ppb (1) | 14.0 ppb (14) | 12.0 ppb (12) | N/A | -1.0 ppb (0) | 7.0 ppb (7) | 0.29 ppb (4) | 19.1 μg/m3 (18) | 12.2 μg/m3 (52) | 52.0 | |
| April 17, 2021, 7 a.m. | 10.1 ppb (10) | 0.0 ppb (0) | 11.0 ppb (11) | 10.0 ppb (10) | N/A | -1.0 ppb (0) | 12.0 ppb (12) | 0.28 ppb (4) | 20.5 μg/m3 (19) | 12.2 μg/m3 (52) | 52.0 | |
| April 17, 2021, 6 a.m. | 15.0 ppb (15) | 0.1 ppb (1) | 17.0 ppb (17) | 15.0 ppb (15) | N/A | N/A | 10.0 ppb (10) | 0.3 ppb (4) | 21.2 μg/m3 (20) | 11.2 μg/m3 (47) | 47.0 | |
| April 17, 2021, 5 a.m. | 26.8 ppb (26) | 3.1 ppb (3) | 29.0 ppb (28) | 24.0 ppb (23) | N/A | 0.0 ppb (0) | 5.0 ppb (5) | 0.38 ppb (5) | 21.5 μg/m3 (20) | 12.4 μg/m3 (52) | 52.0 | |
| April 17, 2021, 4 a.m. | 34.0 ppb (33) | 6.0 ppb (6) | 41.0 ppb (39) | 28.0 ppb (27) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.44 ppb (5) | N/A | N/A | 39.0 | |
| April 17, 2021, 3 a.m. | 21.0 ppb (20) | 3.0 ppb (3) | 30.0 ppb (29) | 18.0 ppb (17) | N/A | 0.0 ppb (0) | 9.0 ppb (9) | 0.34 ppb (4) | 29.7 μg/m3 (28) | 18.0 μg/m3 (64) | 64.0 | |
| April 17, 2021, 2 a.m. | 7.9 ppb (8) | -0.1 ppb (0) | 10.0 ppb (10) | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.27 ppb (4) | 29.7 μg/m3 (28) | 19.2 μg/m3 (66) | 66.0 | |
| April 17, 2021, 1 a.m. | 6.5 ppb (7) | -0.1 ppb (0) | 7.0 ppb (7) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.26 ppb (4) | 30.1 μg/m3 (28) | 20.8 μg/m3 (70) | 70.0 | |
| April 17, 2021, midnight | 4.8 ppb (5) | -0.1 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.24 ppb (3) | 26.8 μg/m3 (25) | 16.6 μg/m3 (61) | 61.0 | |
| April 16, 2021, 11 p.m. | 3.6 ppb (4) | -0.1 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.19 ppb (3) | 14.5 μg/m3 (14) | 6.0 μg/m3 (25) | 38.0 | |
| April 16, 2021, 10 p.m. | 4.2 ppb (4) | 0.0 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.19 ppb (3) | 15.4 μg/m3 (15) | 6.1 μg/m3 (26) | 39.0 | |
| April 16, 2021, 9 p.m. | 7.4 ppb (7) | 1.1 ppb (2) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.38 ppb (5) | 26.4 μg/m3 (25) | 7.7 μg/m3 (33) | 43.0 | |
| April 16, 2021, 8 p.m. | 5.2 ppb (5) | 1.1 ppb (2) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 48.0 ppb (45) | 0.47 ppb (6) | 18.7 μg/m3 (18) | 6.6 μg/m3 (28) | 45.0 | |
| April 16, 2021, 7 p.m. | 1.8 ppb (2) | 0.0 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.16 ppb (3) | 13.2 μg/m3 (13) | 5.2 μg/m3 (22) | 43.0 | |
| April 16, 2021, 6 p.m. | 1.3 ppb (2) | 0.0 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.16 ppb (3) | 12.6 μg/m3 (12) | 4.8 μg/m3 (20) | 41.0 | |
| April 16, 2021, 5 p.m. | 1.5 ppb (2) | 0.0 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.16 ppb (3) | 15.0 μg/m3 (14) | 4.8 μg/m3 (20) | 38.0 | |
| April 16, 2021, 4 p.m. | 1.8 ppb (2) | 0.1 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.16 ppb (3) | 13.0 μg/m3 (13) | 4.4 μg/m3 (19) | 35.0 | |
| April 16, 2021, 3 p.m. | 2.5 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.16 ppb (3) | 11.1 μg/m3 (11) | 4.0 μg/m3 (17) | 31.0 | |
| April 16, 2021, 2 p.m. | 6.3 ppb (6) | 1.2 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.2 ppb (3) | 12.2 μg/m3 (12) | 4.3 μg/m3 (18) | 25.0 | |
| April 16, 2021, 1 p.m. | 14.0 ppb (14) | 2.7 ppb (3) | N/A | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.25 ppb (3) | 13.4 μg/m3 (13) | 6.0 μg/m3 (25) | 25.0 | |
| April 16, 2021, noon | 19.1 ppb (19) | 5.0 ppb (5) | 21.0 ppb (20) | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 8.0 ppb (8) | 0.26 ppb (4) | 12.4 μg/m3 (12) | 4.9 μg/m3 (21) | 21.0 | |
| April 16, 2021, 11 a.m. | 20.9 ppb (20) | 2.1 ppb (2) | 23.0 ppb (22) | 19.0 ppb (18) | N/A | -1.0 ppb (0) | 4.0 ppb (4) | 0.23 ppb (3) | 9.6 μg/m3 (9) | 4.6 μg/m3 (20) | 22.0 | |
| April 16, 2021, 10 a.m. | 17.2 ppb (17) | 0.2 ppb (1) | 20.0 ppb (19) | 17.0 ppb (17) | N/A | -1.0 ppb (0) | 6.0 ppb (6) | 0.2 ppb (3) | 9.2 μg/m3 (9) | 4.3 μg/m3 (18) | 19.0 | |
| April 16, 2021, 9 a.m. | 6.8 ppb (7) | -0.2 ppb (0) | 8.0 ppb (8) | 7.0 ppb (7) | N/A | -1.0 ppb (0) | 19.0 ppb (18) | 0.16 ppb (3) | 9.6 μg/m3 (9) | 4.1 μg/m3 (18) | 18.0 | |
| April 16, 2021, 8 a.m. | 5.0 ppb (5) | -0.2 ppb (0) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | -1.0 ppb (0) | 22.0 ppb (21) | 0.16 ppb (3) | 9.2 μg/m3 (9) | 4.1 μg/m3 (18) | 21.0 | |
| April 16, 2021, 7 a.m. | 3.6 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 24.0 ppb (23) | 0.15 ppb (2) | 11.6 μg/m3 (11) | 4.4 μg/m3 (19) | 23.0 | |
| April 16, 2021, 6 a.m. | 4.3 ppb (5) | -0.2 ppb (0) | 4.0 ppb (4) | 5.0 ppb (5) | N/A | -1.0 ppb (0) | 27.0 ppb (25) | 0.18 ppb (3) | 9.8 μg/m3 (10) | 4.3 μg/m3 (18) | 25.0 | |
| April 16, 2021, 5 a.m. | 3.5 ppb (4) | -0.3 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 29.0 ppb (27) | 0.18 ppb (3) | 9.7 μg/m3 (9) | 4.4 μg/m3 (19) | 27.0 | |
| April 16, 2021, 4 a.m. | 3.5 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 31.0 ppb (29) | 0.19 ppb (3) | N/A | N/A | 29.0 | |
| April 16, 2021, 3 a.m. | 3.7 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 34.0 ppb (32) | 0.19 ppb (3) | 11.2 μg/m3 (11) | 4.5 μg/m3 (19) | 32.0 | |
| April 16, 2021, 2 a.m. | 4.1 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 37.0 ppb (35) | 0.21 ppb (3) | 15.7 μg/m3 (15) | 6.8 μg/m3 (29) | 35.0 | |
| April 16, 2021, 1 a.m. | 7.2 ppb (7) | -0.2 ppb (0) | 8.0 ppb (8) | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.23 ppb (3) | 19.8 μg/m3 (19) | 9.0 μg/m3 (38) | 38.0 | |
| April 16, 2021, midnight | 5.1 ppb (5) | -0.2 ppb (0) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.2 ppb (3) | 16.8 μg/m3 (16) | 6.1 μg/m3 (26) | 38.0 | |
| April 15, 2021, 11 p.m. | N/A | N/A | 5.0 ppb (5) | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.2 ppb (3) | 19.1 μg/m3 (18) | 6.3 μg/m3 (27) | 41.0 | |
| April 15, 2021, 10 p.m. | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (45) | 0.21 ppb (3) | 17.7 μg/m3 (17) | 6.2 μg/m3 (26) | 45.0 | |
| April 15, 2021, 9 p.m. | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.2 ppb (3) | 17.6 μg/m3 (17) | 6.1 μg/m3 (26) | 47.0 | |
| April 15, 2021, 8 p.m. | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.2 ppb (3) | 19.8 μg/m3 (19) | 6.0 μg/m3 (25) | 47.0 | |
| April 15, 2021, 7 p.m. | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (45) | 0.19 ppb (3) | 18.8 μg/m3 (18) | 5.7 μg/m3 (24) | 45.0 | |
| April 15, 2021, 6 p.m. | 4.4 ppb (5) | 0.6 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.2 ppb (3) | 21.2 μg/m3 (20) | 6.5 μg/m3 (28) | 42.0 | |
| April 15, 2021, 5 p.m. | 5.3 ppb (5) | 0.9 ppb (1) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.21 ppb (3) | 18.7 μg/m3 (18) | 7.5 μg/m3 (32) | 37.0 | |
| April 15, 2021, 4 p.m. | 5.7 ppb (6) | 0.9 ppb (1) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.22 ppb (3) | 15.7 μg/m3 (15) | 7.6 μg/m3 (32) | 32.0 | |
| April 15, 2021, 3 p.m. | 8.7 ppb (9) | 1.8 ppb (2) | 9.0 ppb (9) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.25 ppb (3) | 15.4 μg/m3 (15) | 8.4 μg/m3 (36) | 36.0 | |
| April 15, 2021, 2 p.m. | 9.1 ppb (9) | 1.7 ppb (2) | 10.0 ppb (10) | 8.0 ppb (8) | N/A | -1.0 ppb (0) | 26.0 ppb (25) | 0.25 ppb (3) | 16.4 μg/m3 (16) | 9.5 μg/m3 (40) | 40.0 | |
| April 15, 2021, 1 p.m. | 9.0 ppb (9) | 1.3 ppb (2) | 10.0 ppb (10) | 8.0 ppb (8) | N/A | -1.0 ppb (0) | 25.0 ppb (24) | 0.24 ppb (3) | 13.2 μg/m3 (13) | 8.3 μg/m3 (35) | 35.0 | |
| April 15, 2021, noon | 9.7 ppb (10) | 0.7 ppb (1) | 11.0 ppb (11) | 9.0 ppb (9) | N/A | -1.0 ppb (0) | 17.0 ppb (16) | 0.26 ppb (4) | 10.6 μg/m3 (10) | 6.6 μg/m3 (28) | 28.0 | |
| April 15, 2021, 11 a.m. | 7.9 ppb (8) | 0.0 ppb (0) | 9.0 ppb (9) | 8.0 ppb (8) | N/A | -1.0 ppb (0) | 17.0 ppb (16) | 0.24 ppb (3) | 9.4 μg/m3 (9) | 5.6 μg/m3 (24) | 24.0 | |
| April 15, 2021, 10 a.m. | 5.6 ppb (6) | -0.2 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | -1.0 ppb (0) | 20.0 ppb (19) | 0.22 ppb (3) | 8.8 μg/m3 (9) | 4.9 μg/m3 (21) | 21.0 | |
| April 15, 2021, 9 a.m. | 4.2 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | -1.0 ppb (0) | 24.0 ppb (23) | 0.21 ppb (3) | 10.9 μg/m3 (11) | 7.3 μg/m3 (31) | 31.0 | |
| April 15, 2021, 8 a.m. | 4.9 ppb (5) | -0.2 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | -1.0 ppb (0) | 25.0 ppb (24) | 0.22 ppb (3) | 14.8 μg/m3 (14) | 9.3 μg/m3 (39) | 39.0 | |
| April 15, 2021, 7 a.m. | 4.7 ppb (5) | -0.1 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | -1.0 ppb (0) | 27.0 ppb (25) | 0.21 ppb (3) | 18.1 μg/m3 (17) | 11.5 μg/m3 (48) | 48.0 | |
| April 15, 2021, 6 a.m. | 5.5 ppb (6) | -0.1 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | -1.0 ppb (0) | 21.0 ppb (20) | 0.21 ppb (3) | 22.2 μg/m3 (21) | 13.7 μg/m3 (55) | 55.0 | |
| April 15, 2021, 5 a.m. | 7.9 ppb (8) | -0.1 ppb (0) | 9.0 ppb (9) | 8.0 ppb (8) | N/A | -1.0 ppb (0) | 17.0 ppb (16) | 0.22 ppb (3) | 21.2 μg/m3 (20) | 12.0 μg/m3 (50) | 50.0 | |
| April 15, 2021, 4 a.m. | 6.8 ppb (7) | -0.1 ppb (0) | 8.0 ppb (8) | 7.0 ppb (7) | N/A | N/A | 20.0 ppb (19) | 0.21 ppb (3) | 20.7 μg/m3 (20) | 12.0 μg/m3 (50) | 50.0 | |
| April 15, 2021, 3 a.m. | 6.9 ppb (7) | -0.1 ppb (0) | 8.0 ppb (8) | 7.0 ppb (7) | N/A | -1.0 ppb (0) | 23.0 ppb (22) | 0.21 ppb (3) | 21.5 μg/m3 (20) | 11.5 μg/m3 (48) | 48.0 | |
| April 15, 2021, 2 a.m. | 5.4 ppb (6) | -0.1 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.2 ppb (3) | 20.9 μg/m3 (20) | 11.1 μg/m3 (47) | 47.0 | |
| April 15, 2021, 1 a.m. | 7.2 ppb (7) | -0.1 ppb (0) | 8.0 ppb (8) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.21 ppb (3) | 19.5 μg/m3 (19) | 10.5 μg/m3 (44) | 44.0 | |
| April 15, 2021, midnight | 10.8 ppb (11) | -0.1 ppb (0) | 12.0 ppb (12) | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.23 ppb (3) | 18.3 μg/m3 (17) | 9.6 μg/m3 (40) | 40.0 | |
| April 14, 2021, 11 p.m. | 5.7 ppb (6) | 0.0 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | -1.0 ppb (0) | 31.0 ppb (29) | 0.21 ppb (3) | 18.7 μg/m3 (18) | 9.8 μg/m3 (41) | 41.0 | |
| April 14, 2021, 10 p.m. | 9.4 ppb (9) | 0.2 ppb (1) | 10.0 ppb (10) | 9.0 ppb (9) | N/A | -1.0 ppb (0) | 28.0 ppb (26) | 0.22 ppb (3) | 20.1 μg/m3 (19) | 9.5 μg/m3 (40) | 40.0 | |
| April 14, 2021, 9 p.m. | 5.4 ppb (6) | 0.1 ppb (1) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.19 ppb (3) | 24.7 μg/m3 (23) | 9.7 μg/m3 (41) | 41.0 | |
| April 14, 2021, 8 p.m. | 5.6 ppb (6) | 0.1 ppb (1) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 49.0 ppb (46) | 0.2 ppb (3) | 36.6 μg/m3 (34) | 17.0 μg/m3 (62) | 62.0 |