Laurel (I 95) MD, US: 39.143197, -76.846192
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| June 23, 2021, 4 p.m. | 23.6 ppb (23) | 12.7 ppb (12) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 1.0 μg/m3 (5) | 23.0 | |
| June 23, 2021, 3 p.m. | 18.7 ppb (18) | 9.2 ppb (9) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 2.0 μg/m3 (9) | 18.0 | |
| June 23, 2021, 2 p.m. | 14.2 ppb (14) | 6.4 ppb (7) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.16 ppb (3) | N/A | 1.0 μg/m3 (5) | 14.0 | |
| June 23, 2021, 1 p.m. | 22.8 ppb (22) | 11.8 ppb (12) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 3.0 μg/m3 (13) | 22.0 | |
| June 23, 2021, noon | 17.7 ppb (17) | 9.1 ppb (9) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| June 23, 2021, 11 a.m. | 29.4 ppb (28) | 18.0 ppb (17) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 2.0 μg/m3 (9) | 28.0 | |
| June 23, 2021, 10 a.m. | 41.1 ppb (39) | 28.5 ppb (27) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 2.0 μg/m3 (9) | 39.0 | |
| June 23, 2021, 9 a.m. | 42.1 ppb (40) | 30.6 ppb (29) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 3.0 μg/m3 (13) | 40.0 | |
| June 23, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| June 23, 2021, 7 a.m. | 32.3 ppb (31) | 22.3 ppb (22) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| June 23, 2021, 6 a.m. | 32.6 ppb (31) | 21.2 ppb (20) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| June 23, 2021, 5 a.m. | 36.6 ppb (35) | 23.9 ppb (23) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 5.0 μg/m3 (21) | 35.0 | |
| June 23, 2021, 4 a.m. | 48.5 ppb (46) | 34.7 ppb (33) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 46.0 | |
| June 23, 2021, 3 a.m. | 16.6 ppb (16) | 9.6 ppb (10) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 23, 2021, 2 a.m. | 19.2 ppb (19) | 9.8 ppb (10) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| June 23, 2021, 1 a.m. | 16.3 ppb (16) | 7.8 ppb (8) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 23, 2021, midnight | 21.1 ppb (20) | 9.0 ppb (9) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 22, 2021, 11 p.m. | 13.3 ppb (13) | 5.8 ppb (6) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| June 22, 2021, 10 p.m. | 14.2 ppb (14) | 6.2 ppb (6) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 3.0 μg/m3 (13) | 14.0 | |
| June 22, 2021, 9 p.m. | 15.3 ppb (15) | 6.7 ppb (7) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 3.0 μg/m3 (13) | 15.0 | |
| June 22, 2021, 8 p.m. | 14.8 ppb (14) | 6.5 ppb (7) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 3.0 μg/m3 (13) | 14.0 | |
| June 22, 2021, 7 p.m. | 20.0 ppb (19) | 9.7 ppb (10) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 1.0 μg/m3 (5) | 19.0 | |
| June 22, 2021, 6 p.m. | 19.2 ppb (19) | 9.9 ppb (10) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 1.0 μg/m3 (5) | 19.0 | |
| June 22, 2021, 5 p.m. | 20.2 ppb (20) | 10.2 ppb (10) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 1.0 μg/m3 (5) | 20.0 | |
| June 22, 2021, 4 p.m. | 34.0 ppb (33) | 17.8 ppb (17) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 3.0 μg/m3 (13) | 33.0 | |
| June 22, 2021, 3 p.m. | 24.2 ppb (23) | 11.1 ppb (11) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 22, 2021, 2 p.m. | 22.5 ppb (22) | 9.7 ppb (10) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 22, 2021, 1 p.m. | 22.9 ppb (22) | 8.6 ppb (9) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| June 22, 2021, noon | 36.7 ppb (35) | 21.0 ppb (20) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 5.0 μg/m3 (21) | 35.0 | |
| June 22, 2021, 11 a.m. | 66.3 ppb (65) | 49.8 ppb (47) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 5.0 μg/m3 (21) | 65.0 | |
| June 22, 2021, 10 a.m. | 62.3 ppb (60) | 47.6 ppb (45) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.4 ppb (5) | N/A | 6.0 μg/m3 (25) | 60.0 | |
| June 22, 2021, 9 a.m. | 86.1 ppb (86) | 68.5 ppb (67) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 6.0 μg/m3 (25) | 86.0 | |
| June 22, 2021, 8 a.m. | 77.6 ppb (77) | 59.8 ppb (58) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 5.0 μg/m3 (21) | 77.0 | |
| June 22, 2021, 7 a.m. | 45.0 ppb (43) | 27.9 ppb (27) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 43.0 | |
| June 22, 2021, 6 a.m. | 52.8 ppb (50) | 32.5 ppb (31) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 3.0 μg/m3 (13) | 50.0 | |
| June 22, 2021, 5 a.m. | 40.2 ppb (38) | 18.0 ppb (17) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 4.0 μg/m3 (17) | 38.0 | |
| June 22, 2021, 4 a.m. | 49.7 ppb (47) | 26.5 ppb (25) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 47.0 | |
| June 22, 2021, 3 a.m. | 30.5 ppb (29) | 12.9 ppb (13) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.18 ppb (3) | N/A | 5.0 μg/m3 (21) | 29.0 | |
| June 22, 2021, 2 a.m. | 37.0 ppb (35) | 17.3 ppb (17) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 5.0 μg/m3 (21) | 35.0 | |
| June 22, 2021, 1 a.m. | 56.8 ppb (54) | 30.7 ppb (29) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 6.0 μg/m3 (25) | 54.0 | |
| June 22, 2021, midnight | 36.8 ppb (35) | 14.9 ppb (15) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 6.0 μg/m3 (25) | 35.0 | |
| June 21, 2021, 11 p.m. | 31.3 ppb (30) | 11.9 ppb (12) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 30.0 | |
| June 21, 2021, 10 p.m. | 18.1 ppb (18) | 6.7 ppb (7) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 21, 2021, 9 p.m. | 42.1 ppb (40) | 17.9 ppb (17) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 8.0 μg/m3 (34) | 40.0 | |
| June 21, 2021, 8 p.m. | 40.5 ppb (39) | 19.6 ppb (19) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 8.0 μg/m3 (34) | 39.0 | |
| June 21, 2021, 7 p.m. | 31.5 ppb (30) | 13.1 ppb (13) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 21, 2021, 6 p.m. | 27.1 ppb (26) | 10.5 ppb (10) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| June 21, 2021, 5 p.m. | 27.2 ppb (26) | 12.0 ppb (12) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| June 21, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| June 21, 2021, 3 p.m. | 36.3 ppb (35) | 17.0 ppb (17) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 21, 2021, 2 p.m. | 39.4 ppb (38) | 20.8 ppb (20) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 21, 2021, 1 p.m. | 33.8 ppb (32) | 18.9 ppb (18) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 21, 2021, noon | 31.9 ppb (31) | 19.6 ppb (19) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 21, 2021, 11 a.m. | 42.2 ppb (40) | 28.1 ppb (27) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 21, 2021, 10 a.m. | 56.6 ppb (54) | 39.0 ppb (37) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 8.0 μg/m3 (34) | 54.0 | |
| June 21, 2021, 9 a.m. | 55.8 ppb (53) | 37.7 ppb (36) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 9.0 μg/m3 (38) | 53.0 | |
| June 21, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| June 21, 2021, 7 a.m. | 41.4 ppb (40) | 23.4 ppb (23) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 40.0 | |
| June 21, 2021, 6 a.m. | 40.0 ppb (38) | 21.5 ppb (21) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 38.0 | |
| June 21, 2021, 5 a.m. | 26.7 ppb (26) | 12.4 ppb (12) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 21, 2021, 4 a.m. | 30.6 ppb (29) | 15.5 ppb (15) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 29.0 | |
| June 21, 2021, 3 a.m. | 35.8 ppb (34) | 18.8 ppb (18) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 7.0 μg/m3 (30) | 34.0 | |
| June 21, 2021, 2 a.m. | 32.1 ppb (31) | 15.4 ppb (15) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 7.0 μg/m3 (30) | 31.0 | |
| June 21, 2021, 1 a.m. | 31.0 ppb (30) | 13.7 ppb (13) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 21, 2021, midnight | 26.1 ppb (25) | 9.6 ppb (10) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| June 20, 2021, 11 p.m. | 19.6 ppb (19) | 7.3 ppb (7) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 20, 2021, 10 p.m. | 18.5 ppb (18) | 7.2 ppb (7) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| June 20, 2021, 9 p.m. | 20.3 ppb (20) | 7.1 ppb (7) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| June 20, 2021, 8 p.m. | 14.0 ppb (14) | 3.1 ppb (3) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| June 20, 2021, 7 p.m. | 15.1 ppb (15) | 4.2 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| June 20, 2021, 6 p.m. | 6.2 ppb (6) | 1.2 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 20, 2021, 5 p.m. | 5.3 ppb (5) | 1.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 20, 2021, 4 p.m. | 13.6 ppb (13) | 4.1 ppb (4) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 20, 2021, 3 p.m. | 15.6 ppb (15) | 4.8 ppb (5) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 20, 2021, 2 p.m. | 17.7 ppb (17) | 5.8 ppb (6) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 20, 2021, 1 p.m. | 18.8 ppb (18) | 6.3 ppb (6) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.4 ppb (5) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 20, 2021, noon | 24.8 ppb (24) | 9.0 ppb (9) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.46 ppb (6) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 20, 2021, 11 a.m. | 53.3 ppb (51) | 33.6 ppb (32) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.53 ppb (6) | N/A | 12.0 μg/m3 (50) | 51.0 | |
| June 20, 2021, 10 a.m. | 42.3 ppb (40) | 30.4 ppb (29) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 8.0 μg/m3 (34) | 40.0 | |
| June 20, 2021, 9 a.m. | 28.9 ppb (28) | 17.2 ppb (17) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 20, 2021, 8 a.m. | 37.7 ppb (36) | 23.8 ppb (23) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 20, 2021, 7 a.m. | 56.1 ppb (54) | 36.9 ppb (35) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 10.0 μg/m3 (42) | 54.0 | |
| June 20, 2021, 6 a.m. | 48.2 ppb (46) | 27.6 ppb (27) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 8.0 μg/m3 (34) | 46.0 | |
| June 20, 2021, 5 a.m. | 53.4 ppb (51) | 27.8 ppb (27) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 6.0 μg/m3 (25) | 51.0 | |
| June 20, 2021, 4 a.m. | 33.9 ppb (32) | 14.3 ppb (14) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| June 20, 2021, 3 a.m. | 34.1 ppb (33) | 9.7 ppb (10) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 5.0 μg/m3 (21) | 33.0 | |
| June 20, 2021, 2 a.m. | 27.0 ppb (26) | 10.4 ppb (10) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 4.0 μg/m3 (17) | 26.0 | |
| June 20, 2021, 1 a.m. | 13.6 ppb (13) | 3.0 ppb (3) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 20, 2021, midnight | 11.1 ppb (11) | 2.5 ppb (3) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 2.0 μg/m3 (9) | 11.0 | |
| June 19, 2021, 11 p.m. | 13.4 ppb (13) | 2.8 ppb (3) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 1.0 μg/m3 (5) | 13.0 | |
| June 19, 2021, 10 p.m. | 9.6 ppb (10) | 2.4 ppb (3) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| June 19, 2021, 9 p.m. | 9.1 ppb (9) | 1.8 ppb (2) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 19, 2021, 8 p.m. | 8.7 ppb (9) | 2.1 ppb (2) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| June 19, 2021, 7 p.m. | 8.6 ppb (9) | 1.9 ppb (2) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 19, 2021, 6 p.m. | 14.5 ppb (14) | 3.9 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| June 19, 2021, 5 p.m. | 14.2 ppb (14) | 3.6 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| June 19, 2021, 4 p.m. | 15.2 ppb (15) | 4.0 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 19, 2021, 3 p.m. | 16.9 ppb (16) | 5.0 ppb (5) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| June 19, 2021, 2 p.m. | 29.6 ppb (28) | 11.8 ppb (12) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| June 19, 2021, 1 p.m. | 30.4 ppb (29) | 9.4 ppb (9) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| June 19, 2021, noon | 28.3 ppb (27) | 7.0 ppb (7) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| June 19, 2021, 11 a.m. | 37.9 ppb (36) | 11.4 ppb (11) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 19, 2021, 10 a.m. | 42.8 ppb (41) | 12.4 ppb (12) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 9.0 μg/m3 (38) | 41.0 | |
| June 19, 2021, 9 a.m. | 37.3 ppb (36) | 10.8 ppb (11) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| June 19, 2021, 8 a.m. | 49.2 ppb (47) | 16.7 ppb (16) | N/A | 32.0 ppb (31) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 10.0 μg/m3 (42) | 47.0 | |
| June 19, 2021, 7 a.m. | 42.2 ppb (40) | 11.8 ppb (12) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 9.0 μg/m3 (38) | 40.0 | |
| June 19, 2021, 6 a.m. | 39.3 ppb (38) | 10.5 ppb (10) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| June 19, 2021, 5 a.m. | 42.3 ppb (40) | 12.3 ppb (12) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 9.0 μg/m3 (38) | 40.0 | |
| June 19, 2021, 4 a.m. | 43.7 ppb (42) | 13.6 ppb (13) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | 13.0 μg/m3 (53) | 53.0 | |
| June 19, 2021, 3 a.m. | 45.1 ppb (43) | 14.1 ppb (14) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 8.0 μg/m3 (34) | 43.0 | |
| June 19, 2021, 2 a.m. | 54.5 ppb (52) | 21.4 ppb (21) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 11.0 μg/m3 (46) | 52.0 | |
| June 19, 2021, 1 a.m. | 53.9 ppb (51) | 17.9 ppb (17) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| June 19, 2021, midnight | 50.9 ppb (49) | 15.0 ppb (15) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | 0.4 ppb (5) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| June 18, 2021, 11 p.m. | 50.7 ppb (48) | 16.6 ppb (16) | N/A | 34.0 ppb (33) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 11.0 μg/m3 (46) | 48.0 | |
| June 18, 2021, 10 p.m. | 40.7 ppb (39) | 14.9 ppb (15) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| June 18, 2021, 9 p.m. | 30.8 ppb (30) | 11.1 ppb (11) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 18, 2021, 8 p.m. | 24.0 ppb (23) | 7.9 ppb (8) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 18, 2021, 7 p.m. | 15.3 ppb (15) | 5.4 ppb (6) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.13 ppb (2) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| June 18, 2021, 6 p.m. | 26.0 ppb (25) | 7.5 ppb (8) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 18, 2021, 5 p.m. | 29.6 ppb (28) | 10.1 ppb (10) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| June 18, 2021, 4 p.m. | 31.5 ppb (30) | 11.4 ppb (11) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 6.0 μg/m3 (25) | 30.0 | |
| June 18, 2021, 3 p.m. | 34.6 ppb (33) | 14.0 ppb (14) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 4.0 μg/m3 (17) | 33.0 | |
| June 18, 2021, 2 p.m. | 46.1 ppb (44) | 19.3 ppb (19) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 44.0 | |
| June 18, 2021, 1 p.m. | 48.9 ppb (47) | 22.2 ppb (21) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 8.0 μg/m3 (34) | 47.0 | |
| June 18, 2021, noon | 81.7 ppb (81) | 48.5 ppb (46) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | 0.58 ppb (7) | N/A | 13.0 μg/m3 (53) | 81.0 | |
| June 18, 2021, 11 a.m. | 117.2 ppb (105) | 86.5 ppb (86) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | 0.59 ppb (7) | N/A | 11.0 μg/m3 (46) | 105.0 | |
| June 18, 2021, 10 a.m. | 57.7 ppb (55) | 36.8 ppb (35) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 5.0 μg/m3 (21) | 55.0 | |
| June 18, 2021, 9 a.m. | 35.4 ppb (34) | 18.2 ppb (18) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 6.0 μg/m3 (25) | 34.0 | |
| June 18, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 18, 2021, 7 a.m. | 97.3 ppb (98) | 69.4 ppb (68) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 9.0 μg/m3 (38) | 98.0 | |
| June 18, 2021, 6 a.m. | 69.1 ppb (68) | 44.2 ppb (42) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 10.0 μg/m3 (42) | 68.0 | |
| June 18, 2021, 5 a.m. | 41.9 ppb (40) | 21.4 ppb (21) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| June 18, 2021, 4 a.m. | 37.1 ppb (35) | 17.3 ppb (17) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 6.0 μg/m3 (25) | 35.0 | |
| June 18, 2021, 3 a.m. | 52.5 ppb (50) | 23.6 ppb (23) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 7.0 μg/m3 (30) | 50.0 | |
| June 18, 2021, 2 a.m. | 64.7 ppb (63) | 33.1 ppb (32) | N/A | 32.0 ppb (31) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 63.0 | |
| June 18, 2021, 1 a.m. | 29.5 ppb (28) | 9.5 ppb (9) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 0.0 μg/m3 (0) | 28.0 | |
| June 18, 2021, midnight | 12.8 ppb (13) | 3.2 ppb (4) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| June 17, 2021, 11 p.m. | 15.7 ppb (15) | 5.0 ppb (5) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| June 17, 2021, 10 p.m. | 22.1 ppb (21) | 8.3 ppb (8) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 0.0 μg/m3 (0) | 21.0 | |
| June 17, 2021, 9 p.m. | 16.5 ppb (16) | 5.1 ppb (5) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 16.0 | |
| June 17, 2021, 8 p.m. | 14.7 ppb (14) | 5.2 ppb (5) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 1.0 μg/m3 (5) | 14.0 | |
| June 17, 2021, 7 p.m. | 6.0 ppb (6) | 1.9 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.12 ppb (2) | N/A | 1.0 μg/m3 (5) | 6.0 | |
| June 17, 2021, 6 p.m. | 10.2 ppb (10) | 3.8 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| June 17, 2021, 5 p.m. | 8.8 ppb (9) | 3.0 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.13 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| June 17, 2021, 4 p.m. | 10.2 ppb (10) | 4.0 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.13 ppb (2) | N/A | 1.0 μg/m3 (5) | 10.0 | |
| June 17, 2021, 3 p.m. | 10.7 ppb (11) | 4.0 ppb (4) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.12 ppb (2) | N/A | 0.0 μg/m3 (0) | 11.0 | |
| June 17, 2021, 2 p.m. | 18.2 ppb (18) | 8.2 ppb (8) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 18.0 | |
| June 17, 2021, 1 p.m. | 13.9 ppb (14) | 5.1 ppb (5) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.13 ppb (2) | N/A | 1.0 μg/m3 (5) | 14.0 | |
| June 17, 2021, noon | 13.5 ppb (13) | 4.6 ppb (5) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| June 17, 2021, 11 a.m. | 27.3 ppb (26) | 12.5 ppb (12) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 26.0 | |
| June 17, 2021, 10 a.m. | 46.2 ppb (44) | 24.1 ppb (23) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 5.0 μg/m3 (21) | 44.0 | |
| June 17, 2021, 9 a.m. | 49.8 ppb (47) | 26.3 ppb (25) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 47.0 | |
| June 17, 2021, 8 a.m. | 47.4 ppb (45) | 22.5 ppb (22) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.16 ppb (3) | N/A | 6.0 μg/m3 (25) | 45.0 | |
| June 17, 2021, 7 a.m. | 41.1 ppb (39) | 16.8 ppb (16) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 39.0 | |
| June 17, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| June 17, 2021, 5 a.m. | 50.2 ppb (48) | 22.8 ppb (22) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 4.0 μg/m3 (17) | 48.0 | |
| June 17, 2021, 4 a.m. | 43.6 ppb (42) | 16.7 ppb (16) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 42.0 | |
| June 17, 2021, 3 a.m. | 17.0 ppb (17) | 5.2 ppb (5) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.18 ppb (3) | N/A | 3.0 μg/m3 (13) | 17.0 | |
| June 17, 2021, 2 a.m. | 22.1 ppb (21) | 8.9 ppb (9) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 4.0 μg/m3 (17) | 21.0 | |
| June 17, 2021, 1 a.m. | 15.2 ppb (15) | 4.7 ppb (5) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 3.0 μg/m3 (13) | 15.0 | |
| June 17, 2021, midnight | 8.9 ppb (9) | 2.2 ppb (3) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 1.0 μg/m3 (5) | 9.0 | |
| June 16, 2021, 11 p.m. | 14.6 ppb (14) | 3.7 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | -2.0 μg/m3 (0) | 14.0 | |
| June 16, 2021, 10 p.m. | 11.8 ppb (12) | 3.3 ppb (4) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 0.0 μg/m3 (0) | 12.0 | |
| June 16, 2021, 9 p.m. | 12.9 ppb (13) | 4.1 ppb (4) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 2.0 μg/m3 (9) | 13.0 | |
| June 16, 2021, 8 p.m. | 9.4 ppb (9) | 3.0 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| June 16, 2021, 7 p.m. | 10.8 ppb (11) | 3.9 ppb (4) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| June 16, 2021, 6 p.m. | 13.6 ppb (13) | 5.6 ppb (6) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| June 16, 2021, 5 p.m. | 15.4 ppb (15) | 6.6 ppb (7) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 |