Providence (Downtown) RI, US: 41.829495, -71.417457
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 10, 2021, 5 p.m. | 10.3 ppb (10) | 3.9 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 10, 2021, 4 p.m. | 15.3 ppb (15) | 7.7 ppb (8) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 10, 2021, 3 p.m. | 10.8 ppb (11) | 5.4 ppb (6) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 10, 2021, 2 p.m. | 10.0 ppb (10) | 3.8 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 10, 2021, 1 p.m. | 42.1 ppb (40) | 27.5 ppb (26) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.5 ppb (6) | N/A | 6.0 μg/m3 (25) | 26.0 | |
| April 10, 2021, noon | 54.9 ppb (52) | 32.3 ppb (31) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.53 ppb (6) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 10, 2021, 11 a.m. | 49.8 ppb (47) | 36.4 ppb (35) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 5.0 μg/m3 (21) | 35.0 | |
| April 10, 2021, 10 a.m. | 41.5 ppb (40) | 25.8 ppb (25) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| April 10, 2021, 9 a.m. | 38.6 ppb (37) | 25.9 ppb (25) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| April 10, 2021, 8 a.m. | 27.6 ppb (27) | 14.5 ppb (14) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 10, 2021, 7 a.m. | 18.5 ppb (18) | 8.3 ppb (8) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 10, 2021, 6 a.m. | 21.6 ppb (21) | 12.0 ppb (12) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.48 ppb (6) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 10, 2021, 5 a.m. | 18.7 ppb (18) | 11.4 ppb (11) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.46 ppb (6) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 10, 2021, 4 a.m. | 21.0 ppb (20) | 12.3 ppb (12) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 10, 2021, 3 a.m. | 23.4 ppb (23) | 13.2 ppb (13) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.55 ppb (7) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 10, 2021, 2 a.m. | 31.7 ppb (30) | 18.2 ppb (18) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.58 ppb (7) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 10, 2021, 1 a.m. | 15.7 ppb (15) | 6.3 ppb (6) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 10, 2021, midnight | 15.1 ppb (15) | 4.8 ppb (5) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 9, 2021, 11 p.m. | 8.9 ppb (9) | 3.6 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 9, 2021, 10 p.m. | 9.2 ppb (9) | 5.0 ppb (5) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 9, 2021, 9 p.m. | 8.8 ppb (9) | 4.8 ppb (5) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 9, 2021, 8 p.m. | 11.0 ppb (11) | 4.3 ppb (5) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 9, 2021, 7 p.m. | 12.4 ppb (12) | 4.3 ppb (5) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 9, 2021, 6 p.m. | 13.1 ppb (13) | 5.3 ppb (5) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 9, 2021, 5 p.m. | 10.1 ppb (10) | 4.1 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 9, 2021, 4 p.m. | 7.4 ppb (7) | 2.6 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 9, 2021, 3 p.m. | 25.5 ppb (25) | 15.7 ppb (15) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 9, 2021, 2 p.m. | 32.8 ppb (31) | 16.6 ppb (16) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 9, 2021, 1 p.m. | 70.8 ppb (69) | 45.7 ppb (44) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.62 ppb (7) | N/A | 10.0 μg/m3 (42) | 44.0 | |
| April 9, 2021, noon | 56.4 ppb (54) | 34.7 ppb (33) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.57 ppb (7) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 9, 2021, 11 a.m. | 82.0 ppb (81) | 56.1 ppb (54) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.67 ppb (8) | N/A | 8.0 μg/m3 (34) | 54.0 | |
| April 9, 2021, 10 a.m. | 89.0 ppb (89) | 63.4 ppb (62) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.77 ppb (10) | N/A | 7.0 μg/m3 (30) | 62.0 | |
| April 9, 2021, 9 a.m. | 69.0 ppb (67) | 45.1 ppb (43) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.6 ppb (7) | N/A | 6.0 μg/m3 (25) | 43.0 | |
| April 9, 2021, 8 a.m. | 36.8 ppb (35) | 21.7 ppb (21) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 9, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 9, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 9, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 9, 2021, 4 a.m. | 22.5 ppb (22) | 12.7 ppb (12) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 9, 2021, 3 a.m. | 24.6 ppb (24) | 14.9 ppb (15) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 9, 2021, 2 a.m. | 32.0 ppb (31) | 15.8 ppb (15) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.47 ppb (6) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 9, 2021, 1 a.m. | 13.4 ppb (13) | 3.8 ppb (4) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 9, 2021, midnight | 14.0 ppb (14) | 4.0 ppb (4) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 8, 2021, 11 p.m. | 11.2 ppb (11) | 4.8 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 8, 2021, 10 p.m. | 9.5 ppb (9) | 4.0 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 8, 2021, 9 p.m. | 8.2 ppb (8) | 5.2 ppb (5) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 1.0 μg/m3 (5) | 5.0 | |
| April 8, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| April 8, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| April 8, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| April 8, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 8, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| April 8, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| April 8, 2021, 2 p.m. | 18.6 ppb (18) | 10.5 ppb (10) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 2.0 μg/m3 (9) | 10.0 | |
| April 8, 2021, 1 p.m. | 17.5 ppb (17) | 9.8 ppb (10) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 8, 2021, noon | 25.9 ppb (25) | 15.5 ppb (15) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 8, 2021, 11 a.m. | 55.5 ppb (53) | 34.1 ppb (33) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 8, 2021, 10 a.m. | 75.5 ppb (74) | 52.5 ppb (50) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.7 ppb (8) | N/A | 10.0 μg/m3 (42) | 50.0 | |
| April 8, 2021, 9 a.m. | 76.1 ppb (75) | 50.6 ppb (48) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.58 ppb (7) | N/A | 9.0 μg/m3 (38) | 48.0 | |
| April 8, 2021, 8 a.m. | 66.6 ppb (65) | 43.4 ppb (41) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 8.0 μg/m3 (34) | 41.0 | |
| April 8, 2021, 7 a.m. | 45.6 ppb (44) | 24.3 ppb (23) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 8, 2021, 6 a.m. | 54.3 ppb (52) | 29.9 ppb (29) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.45 ppb (6) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 8, 2021, 5 a.m. | 53.9 ppb (51) | 29.3 ppb (28) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.68 ppb (8) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 8, 2021, 4 a.m. | 76.8 ppb (76) | 45.8 ppb (44) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | 0.58 ppb (7) | N/A | 8.0 μg/m3 (34) | 44.0 | |
| April 8, 2021, 3 a.m. | 74.6 ppb (73) | 45.8 ppb (44) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | 0.84 ppb (10) | N/A | 6.0 μg/m3 (25) | 44.0 | |
| April 8, 2021, 2 a.m. | 58.5 ppb (56) | 32.0 ppb (31) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.86 ppb (11) | N/A | 5.0 μg/m3 (21) | 31.0 | |
| April 8, 2021, 1 a.m. | 16.7 ppb (16) | 4.4 ppb (5) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 1.0 μg/m3 (5) | 12.0 | |
| April 8, 2021, midnight | 16.4 ppb (16) | 4.6 ppb (5) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 2.0 μg/m3 (9) | 12.0 | |
| April 7, 2021, 11 p.m. | 12.1 ppb (12) | 5.5 ppb (6) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 7, 2021, 10 p.m. | 10.7 ppb (11) | 5.0 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 7, 2021, 9 p.m. | 12.4 ppb (12) | 5.6 ppb (6) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 7, 2021, 8 p.m. | 9.9 ppb (10) | 3.6 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 2.0 μg/m3 (9) | 9.0 | |
| April 7, 2021, 7 p.m. | 11.0 ppb (11) | 6.2 ppb (6) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 2.0 μg/m3 (9) | 9.0 | |
| April 7, 2021, 6 p.m. | 16.0 ppb (16) | 7.9 ppb (8) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 7, 2021, 5 p.m. | 20.6 ppb (20) | 10.3 ppb (10) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 7, 2021, 4 p.m. | 29.1 ppb (28) | 16.3 ppb (16) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 7, 2021, 3 p.m. | 27.8 ppb (27) | 16.6 ppb (16) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 7, 2021, 2 p.m. | 32.4 ppb (31) | 21.0 ppb (20) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 7, 2021, 1 p.m. | 29.8 ppb (29) | 17.2 ppb (17) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| April 7, 2021, noon | 71.2 ppb (70) | 45.9 ppb (44) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.64 ppb (7) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| April 7, 2021, 11 a.m. | 99.7 ppb (100) | 70.8 ppb (69) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | 0.89 ppb (11) | N/A | 9.0 μg/m3 (38) | 69.0 | |
| April 7, 2021, 10 a.m. | 103.1 ppb (102) | 69.6 ppb (68) | N/A | 34.0 ppb (33) | N/A | N/A | N/A | 0.9 ppb (11) | N/A | 9.0 μg/m3 (38) | 68.0 | |
| April 7, 2021, 9 a.m. | 92.4 ppb (92) | 61.4 ppb (59) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | 0.63 ppb (7) | N/A | 10.0 μg/m3 (42) | 59.0 | |
| April 7, 2021, 8 a.m. | 71.8 ppb (70) | 44.2 ppb (42) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | 0.49 ppb (6) | N/A | 9.0 μg/m3 (38) | 42.0 | |
| April 7, 2021, 7 a.m. | 61.4 ppb (59) | 36.5 ppb (35) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 7.0 μg/m3 (30) | 35.0 | |
| April 7, 2021, 6 a.m. | 51.4 ppb (49) | 27.6 ppb (27) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 7, 2021, 5 a.m. | 41.1 ppb (39) | 17.4 ppb (17) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.55 ppb (7) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 7, 2021, 4 a.m. | 41.4 ppb (40) | 17.5 ppb (17) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.48 ppb (6) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 7, 2021, 3 a.m. | 47.6 ppb (45) | 21.5 ppb (21) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.66 ppb (8) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 7, 2021, 2 a.m. | 37.3 ppb (36) | 17.6 ppb (17) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.58 ppb (7) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 7, 2021, 1 a.m. | 35.6 ppb (34) | 16.4 ppb (16) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 4.0 μg/m3 (17) | 18.0 | |
| April 7, 2021, midnight | 27.6 ppb (27) | 10.0 ppb (10) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 6, 2021, 11 p.m. | 17.1 ppb (17) | 4.7 ppb (5) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 6, 2021, 10 p.m. | 18.7 ppb (18) | 6.7 ppb (7) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 6, 2021, 9 p.m. | 20.3 ppb (20) | 11.1 ppb (11) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 6, 2021, 8 p.m. | 41.5 ppb (40) | 26.6 ppb (26) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.59 ppb (7) | N/A | 4.0 μg/m3 (17) | 26.0 | |
| April 6, 2021, 7 p.m. | 51.9 ppb (49) | 34.5 ppb (33) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.62 ppb (7) | N/A | 5.0 μg/m3 (21) | 33.0 | |
| April 6, 2021, 6 p.m. | 37.4 ppb (36) | 22.6 ppb (22) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 5.0 μg/m3 (21) | 22.0 | |
| April 6, 2021, 5 p.m. | 35.8 ppb (34) | 25.1 ppb (24) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.48 ppb (6) | N/A | 4.0 μg/m3 (17) | 24.0 | |
| April 6, 2021, 4 p.m. | 38.9 ppb (37) | 24.6 ppb (24) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.4 ppb (5) | N/A | 5.0 μg/m3 (21) | 24.0 | |
| April 6, 2021, 3 p.m. | 39.5 ppb (38) | 24.7 ppb (24) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 5.0 μg/m3 (21) | 24.0 | |
| April 6, 2021, 2 p.m. | 40.1 ppb (38) | 30.5 ppb (29) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 5.0 μg/m3 (21) | 29.0 | |
| April 6, 2021, 1 p.m. | 48.8 ppb (47) | 34.9 ppb (33) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 4.0 μg/m3 (17) | 33.0 | |
| April 6, 2021, noon | 55.2 ppb (53) | 40.1 ppb (38) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 7.0 μg/m3 (30) | 38.0 | |
| April 6, 2021, 11 a.m. | 76.2 ppb (75) | 54.8 ppb (52) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.64 ppb (7) | N/A | 11.0 μg/m3 (46) | 52.0 | |
| April 6, 2021, 10 a.m. | 85.9 ppb (85) | 54.3 ppb (52) | N/A | 32.0 ppb (31) | N/A | N/A | N/A | 0.66 ppb (8) | N/A | 8.0 μg/m3 (34) | 52.0 | |
| April 6, 2021, 9 a.m. | 67.0 ppb (65) | 43.1 ppb (41) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.54 ppb (6) | N/A | 9.0 μg/m3 (38) | 41.0 | |
| April 6, 2021, 8 a.m. | 34.6 ppb (33) | 16.6 ppb (16) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 6, 2021, 7 a.m. | 20.2 ppb (20) | 8.1 ppb (8) | 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 | |
| April 6, 2021, 6 a.m. | 23.4 ppb (23) | 9.9 ppb (10) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 6, 2021, 5 a.m. | 14.2 ppb (14) | 6.5 ppb (7) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 6, 2021, 4 a.m. | 17.6 ppb (17) | 7.5 ppb (8) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 6, 2021, 3 a.m. | 17.4 ppb (17) | 10.5 ppb (10) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 6, 2021, 2 a.m. | 22.9 ppb (22) | 11.1 ppb (11) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 6, 2021, 1 a.m. | 14.9 ppb (15) | 9.1 ppb (9) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 6, 2021, midnight | 18.9 ppb (18) | 12.1 ppb (12) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 5, 2021, 11 p.m. | 28.1 ppb (27) | 16.7 ppb (16) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 10 p.m. | 30.8 ppb (30) | 18.0 ppb (17) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.45 ppb (6) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 9 p.m. | 27.6 ppb (27) | 16.0 ppb (16) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 5, 2021, 8 p.m. | 29.5 ppb (28) | 17.6 ppb (17) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 5, 2021, 7 p.m. | 29.1 ppb (28) | 20.8 ppb (20) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 6 p.m. | 34.8 ppb (33) | 24.6 ppb (24) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 5.0 μg/m3 (21) | 24.0 | |
| April 5, 2021, 5 p.m. | 40.2 ppb (38) | 27.4 ppb (26) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 6.0 μg/m3 (25) | 26.0 | |
| April 5, 2021, 4 p.m. | 35.4 ppb (34) | 19.8 ppb (19) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 3 p.m. | 32.6 ppb (31) | 22.3 ppb (22) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 2 p.m. | 38.2 ppb (37) | 22.6 ppb (22) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 5, 2021, 1 p.m. | 45.7 ppb (44) | 28.8 ppb (28) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 5, 2021, noon | 45.0 ppb (43) | 29.3 ppb (28) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 5, 2021, 11 a.m. | 58.3 ppb (56) | 38.5 ppb (37) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.48 ppb (6) | N/A | 8.0 μg/m3 (34) | 37.0 | |
| April 5, 2021, 10 a.m. | 58.8 ppb (57) | 37.2 ppb (36) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.58 ppb (7) | N/A | 7.0 μg/m3 (30) | 36.0 | |
| April 5, 2021, 9 a.m. | 40.0 ppb (38) | 25.4 ppb (24) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 8 a.m. | 25.0 ppb (24) | 14.7 ppb (14) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 7 a.m. | 15.5 ppb (15) | 8.3 ppb (8) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 5, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 5, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 5, 2021, 4 a.m. | 7.8 ppb (8) | 2.6 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 3 a.m. | 13.5 ppb (13) | 6.3 ppb (6) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 5, 2021, 2 a.m. | 19.6 ppb (19) | 9.5 ppb (9) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 5, 2021, 1 a.m. | 26.9 ppb (26) | 12.6 ppb (12) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.49 ppb (6) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 5, 2021, midnight | 26.5 ppb (25) | 16.8 ppb (16) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.46 ppb (6) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 4, 2021, 11 p.m. | 21.5 ppb (21) | 10.8 ppb (11) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 4, 2021, 10 p.m. | 25.9 ppb (25) | 14.7 ppb (14) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 4, 2021, 9 p.m. | 25.3 ppb (24) | 16.6 ppb (16) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.47 ppb (6) | N/A | 3.0 μg/m3 (13) | 16.0 | |
| April 4, 2021, 8 p.m. | 26.2 ppb (25) | 14.9 ppb (15) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.5 ppb (6) | N/A | 3.0 μg/m3 (13) | 15.0 | |
| April 4, 2021, 7 p.m. | 23.1 ppb (22) | 17.1 ppb (17) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.48 ppb (6) | N/A | 2.0 μg/m3 (9) | 17.0 | |
| April 4, 2021, 6 p.m. | 24.8 ppb (24) | 15.6 ppb (15) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 3.0 μg/m3 (13) | 15.0 | |
| April 4, 2021, 5 p.m. | 17.9 ppb (17) | 9.6 ppb (10) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 4, 2021, 4 p.m. | 22.9 ppb (22) | 14.4 ppb (14) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 3.0 μg/m3 (13) | 14.0 | |
| April 4, 2021, 3 p.m. | 26.3 ppb (25) | 16.5 ppb (16) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 3.0 μg/m3 (13) | 16.0 | |
| April 4, 2021, 2 p.m. | 25.3 ppb (24) | 17.9 ppb (17) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 4, 2021, 1 p.m. | 27.3 ppb (26) | 16.1 ppb (16) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.4 ppb (5) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 4, 2021, noon | 44.4 ppb (42) | 23.7 ppb (23) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 4, 2021, 11 a.m. | 62.0 ppb (60) | 33.1 ppb (32) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | 0.71 ppb (8) | N/A | 6.0 μg/m3 (25) | 32.0 | |
| April 4, 2021, 10 a.m. | 77.6 ppb (77) | 46.1 ppb (44) | N/A | 32.0 ppb (31) | N/A | N/A | N/A | 0.9 ppb (11) | N/A | 6.0 μg/m3 (25) | 44.0 | |
| April 4, 2021, 9 a.m. | 64.6 ppb (63) | 31.4 ppb (30) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | 0.55 ppb (7) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 4, 2021, 8 a.m. | 39.1 ppb (37) | 12.8 ppb (13) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 15.0 μg/m3 (58) | 58.0 | |
| April 4, 2021, 7 a.m. | 38.0 ppb (36) | 12.4 ppb (12) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.48 ppb (6) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 4, 2021, 6 a.m. | 39.2 ppb (37) | 13.5 ppb (13) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.81 ppb (10) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| April 4, 2021, 5 a.m. | 43.6 ppb (42) | 17.8 ppb (17) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.75 ppb (10) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 4, 2021, 4 a.m. | 38.6 ppb (37) | 18.8 ppb (18) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.5 ppb (6) | N/A | 17.0 μg/m3 (62) | 62.0 | |
| April 4, 2021, 3 a.m. | 41.1 ppb (39) | 21.1 ppb (20) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.82 ppb (10) | N/A | 18.0 μg/m3 (64) | 64.0 | |
| April 4, 2021, 2 a.m. | 50.7 ppb (48) | 26.6 ppb (26) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 0.86 ppb (11) | N/A | 15.0 μg/m3 (58) | 58.0 | |
| April 4, 2021, 1 a.m. | 62.5 ppb (61) | 30.6 ppb (29) | N/A | 32.0 ppb (31) | N/A | N/A | N/A | 0.9 ppb (11) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| April 4, 2021, midnight | 66.8 ppb (65) | 33.2 ppb (32) | N/A | 34.0 ppb (33) | N/A | N/A | N/A | 0.96 ppb (12) | N/A | 6.0 μg/m3 (25) | 33.0 | |
| April 3, 2021, 11 p.m. | 49.5 ppb (47) | 23.9 ppb (23) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.77 ppb (10) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| April 3, 2021, 10 p.m. | 40.8 ppb (39) | 23.0 ppb (22) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.71 ppb (8) | N/A | 4.0 μg/m3 (17) | 22.0 | |
| April 3, 2021, 9 p.m. | 30.8 ppb (30) | 17.6 ppb (17) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.56 ppb (7) | N/A | 3.0 μg/m3 (13) | 17.0 | |
| April 3, 2021, 8 p.m. | 27.3 ppb (26) | 15.5 ppb (15) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.49 ppb (6) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 3, 2021, 7 p.m. | 23.2 ppb (22) | 14.2 ppb (14) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 3, 2021, 6 p.m. | 26.6 ppb (26) | 18.4 ppb (18) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 |