Riverside Co CA, US: 33.996387, -117.4925
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 26, 2019, 11 p.m. | 2.5 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 46.0 ppb (35) | 0.08 ppb (1) | 19.0 μg/m3 (17) | 6.8 μg/m3 (28) | 35.0 | |
| May 26, 2019, 10 p.m. | 2.5 ppb (2) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 47.0 ppb (36) | 0.08 ppb (1) | 16.0 μg/m3 (15) | 6.6 μg/m3 (28) | 36.0 | |
| May 26, 2019, 9 p.m. | 2.5 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 47.0 ppb (36) | 0.08 ppb (1) | 18.0 μg/m3 (16) | 6.5 μg/m3 (27) | 36.0 | |
| May 26, 2019, 8 p.m. | 2.3 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 46.0 ppb (35) | 0.09 ppb (1) | 24.0 μg/m3 (22) | 8.0 μg/m3 (33) | 35.0 | |
| May 26, 2019, 7 p.m. | 2.7 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 46.0 ppb (35) | 0.08 ppb (1) | 24.0 μg/m3 (22) | 6.5 μg/m3 (27) | 35.0 | |
| May 26, 2019, 6 p.m. | 2.8 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 44.0 ppb (34) | 0.08 ppb (1) | 19.0 μg/m3 (17) | 5.1 μg/m3 (21) | 34.0 | |
| May 26, 2019, 5 p.m. | 2.7 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.09 ppb (1) | 19.0 μg/m3 (17) | 3.1 μg/m3 (13) | 32.0 | |
| May 26, 2019, 4 p.m. | 3.1 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.09 ppb (1) | 11.0 μg/m3 (10) | 3.6 μg/m3 (15) | 30.0 | |
| May 26, 2019, 3 p.m. | 2.1 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.07 ppb (1) | 12.0 μg/m3 (11) | 4.8 μg/m3 (20) | 28.0 | |
| May 26, 2019, 2 p.m. | 2.2 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 36.0 ppb (28) | 0.06 ppb (1) | 13.0 μg/m3 (12) | 4.6 μg/m3 (19) | 28.0 | |
| May 26, 2019, 1 p.m. | 2.1 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (27) | 0.06 ppb (1) | 11.0 μg/m3 (10) | 3.1 μg/m3 (13) | 27.0 | |
| May 26, 2019, noon | 2.7 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 34.0 ppb (26) | 0.07 ppb (1) | 10.0 μg/m3 (9) | 0.1 μg/m3 (0) | 26.0 | |
| May 26, 2019, 11 a.m. | 2.7 ppb (3) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 33.0 ppb (25) | 0.07 ppb (1) | 9.0 μg/m3 (8) | 3.9 μg/m3 (16) | 25.0 | |
| May 26, 2019, 10 a.m. | 2.6 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 34.0 ppb (26) | 0.07 ppb (1) | 9.0 μg/m3 (8) | 8.1 μg/m3 (34) | 34.0 | |
| May 26, 2019, 9 a.m. | 3.0 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 33.0 ppb (25) | 0.09 ppb (1) | 16.0 μg/m3 (15) | 9.2 μg/m3 (38) | 38.0 | |
| May 26, 2019, 8 a.m. | 4.0 ppb (4) | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 30.0 ppb (23) | 0.14 ppb (2) | 23.0 μg/m3 (21) | 9.4 μg/m3 (39) | 39.0 | |
| May 26, 2019, 7 a.m. | 4.8 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 30.0 ppb (23) | 0.11 ppb (1) | 17.0 μg/m3 (15) | 8.7 μg/m3 (36) | 36.0 | |
| May 26, 2019, 6 a.m. | 6.1 ppb (6) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 29.0 ppb (22) | 0.12 ppb (1) | 17.0 μg/m3 (15) | 8.5 μg/m3 (35) | 35.0 | |
| May 26, 2019, 5 a.m. | 5.8 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 31.0 ppb (24) | 0.1 ppb (1) | 16.0 μg/m3 (15) | 8.5 μg/m3 (35) | 35.0 | |
| May 26, 2019, 4 a.m. | 4.6 ppb (4) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 33.0 ppb (25) | 0.11 ppb (1) | 12.0 μg/m3 (11) | 6.8 μg/m3 (28) | 28.0 | |
| May 26, 2019, 3 a.m. | 4.4 ppb (4) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 35.0 ppb (27) | 0.11 ppb (1) | 18.0 μg/m3 (16) | 6.8 μg/m3 (28) | 28.0 | |
| May 26, 2019, 2 a.m. | 4.0 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (31) | 0.1 ppb (1) | 23.0 μg/m3 (21) | 7.6 μg/m3 (32) | 32.0 | |
| May 26, 2019, 1 a.m. | 3.4 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 47.0 ppb (36) | 0.1 ppb (1) | 19.0 μg/m3 (17) | 7.0 μg/m3 (29) | 36.0 | |
| May 26, 2019, midnight | 3.5 ppb (3) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 50.0 ppb (38) | 0.1 ppb (1) | 29.0 μg/m3 (26) | 7.8 μg/m3 (32) | 38.0 | |
| May 25, 2019, 11 p.m. | 3.3 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 52.0 ppb (40) | 0.11 ppb (1) | 28.0 μg/m3 (25) | 7.0 μg/m3 (29) | 40.0 | |
| May 25, 2019, 10 p.m. | 3.2 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (40) | 0.11 ppb (1) | 26.0 μg/m3 (24) | 8.0 μg/m3 (33) | 40.0 | |
| May 25, 2019, 9 p.m. | 3.2 ppb (3) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 54.0 ppb (42) | 0.1 ppb (1) | 23.0 μg/m3 (21) | 8.3 μg/m3 (35) | 42.0 | |
| May 25, 2019, 8 p.m. | 4.1 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 57.0 ppb (44) | 0.12 ppb (1) | 26.0 μg/m3 (24) | 8.5 μg/m3 (35) | 44.0 | |
| May 25, 2019, 7 p.m. | 5.3 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 57.0 ppb (44) | 0.13 ppb (1) | 31.0 μg/m3 (28) | 11.1 μg/m3 (46) | 46.0 | |
| May 25, 2019, 6 p.m. | 4.5 ppb (4) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 53.0 ppb (41) | 0.12 ppb (1) | 26.0 μg/m3 (24) | 11.6 μg/m3 (48) | 48.0 | |
| May 25, 2019, 5 p.m. | 5.6 ppb (5) | 1.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 46.0 ppb (35) | 0.12 ppb (1) | 29.0 μg/m3 (26) | 10.4 μg/m3 (43) | 43.0 | |
| May 25, 2019, 4 p.m. | 9.7 ppb (9) | 3.0 ppb (3) | N/A | 7.0 ppb (6) | N/A | N/A | 34.0 ppb (26) | 0.16 ppb (2) | 26.0 μg/m3 (24) | 8.5 μg/m3 (35) | 35.0 | |
| May 25, 2019, 3 p.m. | 12.5 ppb (12) | 4.2 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | 25.0 ppb (19) | 0.2 ppb (2) | 23.0 μg/m3 (21) | 7.5 μg/m3 (31) | 31.0 | |
| May 25, 2019, 2 p.m. | 17.0 ppb (16) | 6.5 ppb (6) | N/A | 11.0 ppb (10) | N/A | N/A | 17.0 ppb (13) | 0.22 ppb (2) | 28.0 μg/m3 (25) | 10.1 μg/m3 (42) | 42.0 | |
| May 25, 2019, 1 p.m. | 37.4 ppb (35) | 23.7 ppb (22) | N/A | 14.0 ppb (13) | N/A | N/A | 3.0 ppb (2) | 0.44 ppb (5) | 28.0 μg/m3 (25) | 10.4 μg/m3 (43) | 43.0 | |
| May 25, 2019, noon | 31.3 ppb (29) | 16.6 ppb (15) | N/A | 15.0 ppb (14) | N/A | N/A | 2.0 ppb (2) | 0.37 ppb (4) | 19.0 μg/m3 (17) | 7.5 μg/m3 (31) | 31.0 | |
| May 25, 2019, 11 a.m. | 19.3 ppb (18) | 5.0 ppb (5) | N/A | 14.0 ppb (13) | N/A | N/A | 2.0 ppb (2) | 0.3 ppb (3) | 19.0 μg/m3 (17) | 8.5 μg/m3 (35) | 35.0 | |
| May 25, 2019, 10 a.m. | 14.8 ppb (14) | 2.8 ppb (3) | N/A | 12.0 ppb (11) | N/A | N/A | 5.0 ppb (4) | 0.18 ppb (2) | 16.0 μg/m3 (15) | 9.7 μg/m3 (40) | 40.0 | |
| May 25, 2019, 9 a.m. | 15.1 ppb (14) | 2.2 ppb (2) | N/A | 13.0 ppb (12) | N/A | N/A | 8.0 ppb (6) | 0.2 ppb (2) | 22.0 μg/m3 (20) | 8.5 μg/m3 (35) | 35.0 | |
| May 25, 2019, 8 a.m. | 12.6 ppb (12) | 1.7 ppb (2) | N/A | 11.0 ppb (10) | N/A | N/A | 13.0 ppb (10) | 0.18 ppb (2) | 19.0 μg/m3 (17) | 9.4 μg/m3 (39) | 39.0 | |
| May 25, 2019, 7 a.m. | 13.6 ppb (13) | 1.9 ppb (2) | N/A | 12.0 ppb (11) | N/A | N/A | 16.0 ppb (12) | 0.17 ppb (2) | 25.0 μg/m3 (23) | 10.2 μg/m3 (42) | 42.0 | |
| May 25, 2019, 6 a.m. | 12.6 ppb (12) | 1.7 ppb (2) | N/A | 11.0 ppb (10) | N/A | N/A | 23.0 ppb (18) | 0.16 ppb (2) | 21.0 μg/m3 (19) | 5.9 μg/m3 (25) | 25.0 | |
| May 25, 2019, 5 a.m. | 8.5 ppb (8) | 0.8 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | 29.0 ppb (22) | 0.14 ppb (2) | 21.0 μg/m3 (19) | 3.9 μg/m3 (16) | 22.0 | |
| May 25, 2019, 4 a.m. | 9.3 ppb (9) | 1.1 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | 30.0 ppb (23) | 0.17 ppb (2) | 22.0 μg/m3 (20) | 6.6 μg/m3 (28) | 28.0 | |
| May 25, 2019, 3 a.m. | 9.2 ppb (9) | 0.9 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | 32.0 ppb (25) | 0.17 ppb (2) | 23.0 μg/m3 (21) | 7.6 μg/m3 (32) | 32.0 | |
| May 25, 2019, 2 a.m. | 9.1 ppb (8) | 0.7 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | 39.0 ppb (30) | 0.19 ppb (2) | 31.0 μg/m3 (28) | 9.0 μg/m3 (38) | 38.0 | |
| May 25, 2019, 1 a.m. | 8.6 ppb (8) | 1.2 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 47.0 ppb (36) | 0.21 ppb (2) | 37.0 μg/m3 (34) | 9.0 μg/m3 (38) | 38.0 | |
| May 25, 2019, midnight | 9.1 ppb (8) | 1.6 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 49.0 ppb (38) | 0.18 ppb (2) | 36.0 μg/m3 (33) | 9.2 μg/m3 (38) | 38.0 | |
| May 24, 2019, 11 p.m. | 10.5 ppb (10) | 2.3 ppb (2) | N/A | 8.0 ppb (7) | N/A | N/A | 49.0 ppb (38) | 0.19 ppb (2) | 44.0 μg/m3 (40) | 11.6 μg/m3 (48) | 48.0 | |
| May 24, 2019, 10 p.m. | 9.2 ppb (9) | 2.4 ppb (2) | N/A | 7.0 ppb (6) | N/A | N/A | 50.0 ppb (38) | 0.17 ppb (2) | 31.0 μg/m3 (28) | 8.0 μg/m3 (33) | 38.0 | |
| May 24, 2019, 9 p.m. | 4.7 ppb (4) | 1.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 48.0 ppb (37) | 0.11 ppb (1) | 20.0 μg/m3 (18) | 6.8 μg/m3 (28) | 37.0 | |
| May 24, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 μg/m3 (21) | 9.7 μg/m3 (40) | 40.0 | |
| May 24, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 μg/m3 (27) | 11.8 μg/m3 (49) | 49.0 | |
| May 24, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 μg/m3 (33) | 11.1 μg/m3 (46) | 46.0 | |
| May 24, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 μg/m3 (28) | 11.1 μg/m3 (46) | 46.0 | |
| May 24, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 μg/m3 (36) | 13.3 μg/m3 (53) | 53.0 | |
| May 24, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 90.0 μg/m3 (68) | 16.7 μg/m3 (60) | 68.0 | |
| May 24, 2019, 2 p.m. | 73.5 ppb (71) | 54.9 ppb (51) | N/A | 19.0 ppb (18) | N/A | N/A | 4.0 ppb (3) | 0.53 ppb (6) | 38.0 μg/m3 (35) | 18.2 μg/m3 (63) | 71.0 | |
| May 24, 2019, 1 p.m. | 80.5 ppb (78) | 64.4 ppb (61) | N/A | 16.0 ppb (15) | N/A | N/A | 2.0 ppb (2) | 0.71 ppb (8) | 31.0 μg/m3 (28) | 11.6 μg/m3 (48) | 78.0 | |
| May 24, 2019, noon | 64.0 ppb (61) | 52.4 ppb (49) | N/A | 12.0 ppb (11) | N/A | N/A | 2.0 ppb (2) | 0.61 ppb (7) | 27.0 μg/m3 (25) | 9.0 μg/m3 (38) | 61.0 | |
| May 24, 2019, 11 a.m. | 40.1 ppb (37) | 27.6 ppb (26) | N/A | 13.0 ppb (12) | N/A | N/A | 2.0 ppb (2) | 0.47 ppb (5) | 21.0 μg/m3 (19) | 7.1 μg/m3 (30) | 37.0 | |
| May 24, 2019, 10 a.m. | 34.6 ppb (32) | 22.8 ppb (21) | N/A | 12.0 ppb (11) | N/A | N/A | 2.0 ppb (2) | 0.4 ppb (4) | 19.0 μg/m3 (17) | 4.9 μg/m3 (20) | 32.0 | |
| May 24, 2019, 9 a.m. | 33.1 ppb (31) | 18.5 ppb (17) | N/A | 15.0 ppb (14) | N/A | N/A | 2.0 ppb (2) | 0.39 ppb (4) | 22.0 μg/m3 (20) | 4.4 μg/m3 (18) | 31.0 | |
| May 24, 2019, 8 a.m. | 33.9 ppb (31) | 19.0 ppb (18) | N/A | 15.0 ppb (14) | N/A | N/A | 2.0 ppb (2) | 0.48 ppb (5) | 29.0 μg/m3 (26) | 8.7 μg/m3 (36) | 36.0 | |
| May 24, 2019, 7 a.m. | 29.8 ppb (28) | 10.2 ppb (9) | N/A | 20.0 ppb (19) | N/A | N/A | 2.0 ppb (2) | 0.43 ppb (5) | 26.0 μg/m3 (24) | 8.7 μg/m3 (36) | 36.0 | |
| May 24, 2019, 6 a.m. | 27.9 ppb (26) | 7.5 ppb (7) | N/A | 20.0 ppb (19) | N/A | N/A | 2.0 ppb (2) | 0.37 ppb (4) | 27.0 μg/m3 (25) | 7.6 μg/m3 (32) | 32.0 | |
| May 24, 2019, 5 a.m. | 25.5 ppb (24) | 3.5 ppb (3) | N/A | 22.0 ppb (20) | N/A | N/A | 5.0 ppb (4) | 0.34 ppb (4) | 30.0 μg/m3 (27) | 8.9 μg/m3 (37) | 37.0 | |
| May 24, 2019, 4 a.m. | 21.9 ppb (20) | 2.6 ppb (2) | N/A | 19.0 ppb (18) | N/A | N/A | 10.0 ppb (8) | 0.27 ppb (3) | 28.0 μg/m3 (25) | 7.6 μg/m3 (32) | 32.0 | |
| May 24, 2019, 3 a.m. | 17.2 ppb (16) | 1.6 ppb (1) | N/A | 16.0 ppb (15) | N/A | N/A | 19.0 ppb (15) | 0.21 ppb (2) | 23.0 μg/m3 (21) | 6.6 μg/m3 (28) | 28.0 | |
| May 24, 2019, 2 a.m. | 10.9 ppb (10) | 0.8 ppb (1) | N/A | 10.0 ppb (9) | N/A | N/A | 27.0 ppb (21) | 0.14 ppb (2) | 20.0 μg/m3 (18) | 7.1 μg/m3 (30) | 30.0 | |
| May 24, 2019, 1 a.m. | 12.9 ppb (12) | 1.2 ppb (1) | N/A | 12.0 ppb (11) | N/A | N/A | 26.0 ppb (20) | 0.15 ppb (2) | 24.0 μg/m3 (22) | 6.3 μg/m3 (26) | 26.0 | |
| May 24, 2019, midnight | 14.2 ppb (13) | 2.4 ppb (2) | N/A | 12.0 ppb (11) | N/A | N/A | 27.0 ppb (21) | 0.16 ppb (2) | 23.0 μg/m3 (21) | 7.8 μg/m3 (32) | 32.0 | |
| May 23, 2019, 11 p.m. | 19.1 ppb (18) | 3.9 ppb (4) | N/A | 15.0 ppb (14) | N/A | N/A | 23.0 ppb (18) | 0.22 ppb (2) | 23.0 μg/m3 (21) | 9.2 μg/m3 (38) | 38.0 | |
| May 23, 2019, 10 p.m. | 24.2 ppb (22) | 4.6 ppb (4) | N/A | 20.0 ppb (19) | N/A | N/A | 20.0 ppb (15) | 0.2 ppb (2) | 22.0 μg/m3 (20) | 7.0 μg/m3 (29) | 29.0 | |
| May 23, 2019, 9 p.m. | 18.9 ppb (18) | 3.3 ppb (3) | N/A | 16.0 ppb (15) | N/A | N/A | 25.0 ppb (19) | 0.19 ppb (2) | 28.0 μg/m3 (25) | 9.0 μg/m3 (38) | 38.0 | |
| May 23, 2019, 8 p.m. | 24.6 ppb (23) | 5.0 ppb (5) | N/A | 20.0 ppb (19) | N/A | N/A | 20.0 ppb (15) | 0.2 ppb (2) | 34.0 μg/m3 (31) | 10.3 μg/m3 (43) | 43.0 | |
| May 23, 2019, 7 p.m. | 18.6 ppb (17) | 4.5 ppb (4) | N/A | 14.0 ppb (13) | N/A | N/A | 22.0 ppb (17) | 0.18 ppb (2) | 33.0 μg/m3 (30) | 7.5 μg/m3 (31) | 31.0 | |
| May 23, 2019, 6 p.m. | 9.8 ppb (9) | 2.0 ppb (2) | N/A | 8.0 ppb (7) | N/A | N/A | 25.0 ppb (19) | 0.14 ppb (2) | 29.0 μg/m3 (26) | 7.3 μg/m3 (30) | 30.0 | |
| May 23, 2019, 5 p.m. | 13.2 ppb (12) | 2.6 ppb (2) | N/A | 11.0 ppb (10) | N/A | N/A | 22.0 ppb (17) | 0.16 ppb (2) | 37.0 μg/m3 (34) | 9.2 μg/m3 (38) | 38.0 | |
| May 23, 2019, 4 p.m. | 18.1 ppb (17) | 4.2 ppb (4) | N/A | 14.0 ppb (13) | N/A | N/A | 19.0 ppb (15) | 0.19 ppb (2) | 30.0 μg/m3 (27) | 9.2 μg/m3 (38) | 38.0 | |
| May 23, 2019, 3 p.m. | 21.3 ppb (20) | 6.2 ppb (6) | N/A | 15.0 ppb (14) | N/A | N/A | 16.0 ppb (12) | 0.39 ppb (4) | 42.0 μg/m3 (38) | 7.0 μg/m3 (29) | 38.0 | |
| May 23, 2019, 2 p.m. | 13.6 ppb (13) | 2.6 ppb (2) | N/A | 11.0 ppb (10) | N/A | N/A | 17.0 ppb (13) | 0.18 ppb (2) | 22.0 μg/m3 (20) | 6.6 μg/m3 (28) | 28.0 | |
| May 23, 2019, 1 p.m. | 11.8 ppb (11) | 1.7 ppb (2) | N/A | 10.0 ppb (9) | N/A | N/A | 17.0 ppb (13) | 0.15 ppb (2) | 18.0 μg/m3 (16) | 7.5 μg/m3 (31) | 31.0 | |
| May 23, 2019, noon | 14.9 ppb (14) | 1.7 ppb (2) | N/A | 13.0 ppb (12) | N/A | N/A | 15.0 ppb (12) | 0.2 ppb (2) | 12.0 μg/m3 (11) | 6.1 μg/m3 (25) | 25.0 | |
| May 23, 2019, 11 a.m. | 10.1 ppb (9) | 1.2 ppb (1) | N/A | 9.0 ppb (8) | N/A | N/A | 20.0 ppb (15) | 0.13 ppb (1) | 11.0 μg/m3 (10) | 4.9 μg/m3 (20) | 20.0 | |
| May 23, 2019, 10 a.m. | 11.8 ppb (11) | 1.1 ppb (1) | N/A | 11.0 ppb (10) | N/A | N/A | 21.0 ppb (16) | 0.14 ppb (2) | 9.0 μg/m3 (8) | 5.6 μg/m3 (23) | 23.0 | |
| May 23, 2019, 9 a.m. | 16.6 ppb (15) | 0.8 ppb (1) | N/A | 16.0 ppb (15) | N/A | N/A | 18.0 ppb (14) | 0.16 ppb (2) | 9.0 μg/m3 (8) | 6.9 μg/m3 (29) | 29.0 | |
| May 23, 2019, 8 a.m. | 25.5 ppb (24) | 1.1 ppb (1) | N/A | 24.0 ppb (22) | N/A | N/A | 10.0 ppb (8) | 0.23 ppb (3) | 12.0 μg/m3 (11) | 6.2 μg/m3 (26) | 26.0 | |
| May 23, 2019, 7 a.m. | 17.7 ppb (16) | 1.0 ppb (1) | N/A | 17.0 ppb (16) | N/A | N/A | 18.0 ppb (14) | 0.2 ppb (2) | 13.0 μg/m3 (12) | 4.7 μg/m3 (20) | 20.0 | |
| May 23, 2019, 6 a.m. | 21.4 ppb (20) | 1.6 ppb (1) | N/A | 20.0 ppb (19) | N/A | N/A | 10.0 ppb (8) | 0.2 ppb (2) | 16.0 μg/m3 (15) | 9.7 μg/m3 (40) | 40.0 | |
| May 23, 2019, 5 a.m. | 18.3 ppb (17) | 0.9 ppb (1) | N/A | 17.0 ppb (16) | N/A | N/A | 17.0 ppb (13) | 0.2 ppb (2) | 18.0 μg/m3 (16) | 9.9 μg/m3 (41) | 41.0 | |
| May 23, 2019, 4 a.m. | 13.6 ppb (13) | 0.6 ppb (1) | N/A | 13.0 ppb (12) | N/A | N/A | 27.0 ppb (21) | 0.19 ppb (2) | 18.0 μg/m3 (16) | 7.1 μg/m3 (30) | 30.0 | |
| May 23, 2019, 3 a.m. | 13.7 ppb (13) | 0.9 ppb (1) | N/A | 13.0 ppb (12) | N/A | N/A | 30.0 ppb (23) | 0.19 ppb (2) | 11.0 μg/m3 (10) | 4.9 μg/m3 (20) | 23.0 | |
| May 23, 2019, 2 a.m. | 12.5 ppb (12) | 0.6 ppb (1) | N/A | 12.0 ppb (11) | N/A | N/A | 36.0 ppb (28) | 0.16 ppb (2) | 7.0 μg/m3 (6) | 1.9 μg/m3 (8) | 28.0 | |
| May 23, 2019, 1 a.m. | 7.6 ppb (7) | 0.8 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 44.0 ppb (34) | 0.12 ppb (1) | 8.0 μg/m3 (7) | 1.1 μg/m3 (5) | 34.0 | |
| May 23, 2019, midnight | 8.0 ppb (7) | 1.7 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 46.0 ppb (35) | 0.12 ppb (1) | 6.0 μg/m3 (5) | 1.1 μg/m3 (5) | 35.0 | |
| May 22, 2019, 11 p.m. | 8.0 ppb (7) | 1.0 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 45.0 ppb (35) | 0.11 ppb (1) | 4.0 μg/m3 (4) | 3.3 μg/m3 (14) | 35.0 | |
| May 22, 2019, 10 p.m. | 11.6 ppb (11) | 1.3 ppb (1) | N/A | 10.0 ppb (9) | N/A | N/A | 40.0 ppb (31) | 0.13 ppb (1) | 10.0 μg/m3 (9) | 4.9 μg/m3 (20) | 31.0 | |
| May 22, 2019, 9 p.m. | 12.9 ppb (12) | 1.6 ppb (1) | N/A | 11.0 ppb (10) | N/A | N/A | 34.0 ppb (26) | 0.15 ppb (2) | 13.0 μg/m3 (12) | 2.1 μg/m3 (9) | 26.0 | |
| May 22, 2019, 8 p.m. | 5.5 ppb (5) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 46.0 ppb (35) | 0.08 ppb (1) | 19.0 μg/m3 (17) | 4.3 μg/m3 (18) | 35.0 | |
| May 22, 2019, 7 p.m. | 5.0 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 41.0 ppb (32) | 0.08 ppb (1) | 26.0 μg/m3 (24) | 6.1 μg/m3 (25) | 32.0 | |
| May 22, 2019, 6 p.m. | 4.4 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (32) | 0.09 ppb (1) | 22.0 μg/m3 (20) | 3.8 μg/m3 (16) | 32.0 | |
| May 22, 2019, 5 p.m. | 6.3 ppb (6) | 2.0 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (29) | 0.11 ppb (1) | 29.0 μg/m3 (26) | 6.3 μg/m3 (26) | 29.0 | |
| May 22, 2019, 4 p.m. | 8.9 ppb (8) | 3.0 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | 33.0 ppb (25) | 0.1 ppb (1) | 35.0 μg/m3 (32) | 8.5 μg/m3 (35) | 35.0 | |
| May 22, 2019, 3 p.m. | 9.2 ppb (9) | 2.8 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | 28.0 ppb (22) | 0.14 ppb (2) | 29.0 μg/m3 (26) | 7.5 μg/m3 (31) | 31.0 | |
| May 22, 2019, 2 p.m. | 16.2 ppb (15) | 5.6 ppb (5) | N/A | 11.0 ppb (10) | N/A | N/A | 18.0 ppb (14) | 0.16 ppb (2) | 36.0 μg/m3 (33) | 6.8 μg/m3 (28) | 33.0 | |
| May 22, 2019, 1 p.m. | 17.5 ppb (16) | 3.8 ppb (4) | N/A | 14.0 ppb (13) | N/A | N/A | 10.0 ppb (8) | 0.15 ppb (2) | 30.0 μg/m3 (27) | 4.8 μg/m3 (20) | 27.0 | |
| May 22, 2019, noon | 19.5 ppb (18) | 3.1 ppb (3) | N/A | 16.0 ppb (15) | N/A | N/A | 5.0 ppb (4) | 0.19 ppb (2) | 21.0 μg/m3 (19) | 6.1 μg/m3 (25) | 25.0 | |
| May 22, 2019, 11 a.m. | 17.1 ppb (16) | 2.2 ppb (2) | N/A | 15.0 ppb (14) | N/A | N/A | 8.0 ppb (6) | 0.17 ppb (2) | 24.0 μg/m3 (22) | 5.1 μg/m3 (21) | 22.0 | |
| May 22, 2019, 10 a.m. | 20.0 ppb (19) | 3.4 ppb (3) | N/A | 17.0 ppb (16) | N/A | N/A | 4.0 ppb (3) | 0.19 ppb (2) | 21.0 μg/m3 (19) | 4.7 μg/m3 (20) | 20.0 | |
| May 22, 2019, 9 a.m. | 17.1 ppb (16) | 1.8 ppb (2) | N/A | 15.0 ppb (14) | N/A | N/A | 6.0 ppb (5) | 0.19 ppb (2) | 18.0 μg/m3 (16) | 7.3 μg/m3 (30) | 30.0 | |
| May 22, 2019, 8 a.m. | 17.6 ppb (16) | 1.4 ppb (1) | N/A | 16.0 ppb (15) | N/A | N/A | 8.0 ppb (6) | 0.17 ppb (2) | 27.0 μg/m3 (25) | 6.6 μg/m3 (28) | 28.0 | |
| May 22, 2019, 7 a.m. | 14.4 ppb (13) | 1.2 ppb (1) | N/A | 13.0 ppb (12) | N/A | N/A | 14.0 ppb (11) | 0.13 ppb (1) | 26.0 μg/m3 (24) | 7.3 μg/m3 (30) | 30.0 | |
| May 22, 2019, 6 a.m. | 12.6 ppb (12) | 0.6 ppb (1) | N/A | 12.0 ppb (11) | N/A | N/A | 20.0 ppb (15) | 0.13 ppb (1) | 25.0 μg/m3 (23) | 8.2 μg/m3 (34) | 34.0 | |
| May 22, 2019, 5 a.m. | 8.2 ppb (8) | 2.2 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 27.0 ppb (21) | 0.1 ppb (1) | 27.0 μg/m3 (25) | 6.9 μg/m3 (29) | 29.0 | |
| May 22, 2019, 4 a.m. | 5.4 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 31.0 ppb (24) | 0.09 ppb (1) | 29.0 μg/m3 (26) | 6.4 μg/m3 (27) | 27.0 | |
| May 22, 2019, 3 a.m. | 4.6 ppb (4) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 36.0 ppb (28) | 0.09 ppb (1) | 23.0 μg/m3 (21) | 7.1 μg/m3 (30) | 30.0 | |
| May 22, 2019, 2 a.m. | 3.5 ppb (3) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (31) | 0.08 ppb (1) | 22.0 μg/m3 (20) | 6.8 μg/m3 (28) | 31.0 | |
| May 22, 2019, 1 a.m. | 3.2 ppb (3) | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (32) | 0.08 ppb (1) | 28.0 μg/m3 (25) | 5.1 μg/m3 (21) | 32.0 | |
| May 22, 2019, midnight | 3.9 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 43.0 ppb (33) | 0.08 ppb (1) | 25.0 μg/m3 (23) | 4.3 μg/m3 (18) | 33.0 | |
| May 21, 2019, 11 p.m. | 3.4 ppb (3) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 45.0 ppb (35) | 0.08 ppb (1) | 31.0 μg/m3 (28) | 5.6 μg/m3 (23) | 35.0 | |
| May 21, 2019, 10 p.m. | 3.9 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 46.0 ppb (35) | 0.08 ppb (1) | 30.0 μg/m3 (27) | 4.6 μg/m3 (19) | 35.0 | |
| May 21, 2019, 9 p.m. | 4.8 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 49.0 ppb (38) | 0.1 ppb (1) | 29.0 μg/m3 (26) | 3.1 μg/m3 (13) | 38.0 | |
| May 21, 2019, 8 p.m. | 3.4 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (40) | 0.08 ppb (1) | 25.0 μg/m3 (23) | 4.3 μg/m3 (18) | 40.0 | |
| May 21, 2019, 7 p.m. | 3.4 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 49.0 ppb (38) | 0.08 ppb (1) | 16.0 μg/m3 (15) | 5.6 μg/m3 (23) | 38.0 | |
| May 21, 2019, 6 p.m. | 3.3 ppb (3) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 48.0 ppb (37) | 0.09 ppb (1) | 22.0 μg/m3 (20) | 3.8 μg/m3 (16) | 37.0 | |
| May 21, 2019, 5 p.m. | 3.8 ppb (4) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 44.0 ppb (34) | 0.1 ppb (1) | 13.0 μg/m3 (12) | 4.6 μg/m3 (19) | 34.0 | |
| May 21, 2019, 4 p.m. | 6.8 ppb (6) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 38.0 ppb (29) | 0.1 ppb (1) | 23.0 μg/m3 (21) | 5.8 μg/m3 (24) | 29.0 | |
| May 21, 2019, 3 p.m. | 12.0 ppb (11) | 3.7 ppb (3) | N/A | 8.0 ppb (7) | N/A | N/A | 28.0 ppb (22) | 0.16 ppb (2) | 21.0 μg/m3 (19) | 4.1 μg/m3 (17) | 22.0 | |
| May 21, 2019, 2 p.m. | 17.8 ppb (16) | 4.4 ppb (4) | N/A | 13.0 ppb (12) | N/A | N/A | 15.0 ppb (12) | 0.23 ppb (3) | 27.0 μg/m3 (25) | 4.1 μg/m3 (17) | 25.0 | |
| May 21, 2019, 1 p.m. | 18.5 ppb (17) | 3.7 ppb (3) | N/A | 15.0 ppb (14) | N/A | N/A | 12.0 ppb (9) | 0.21 ppb (2) | 15.0 μg/m3 (14) | 5.1 μg/m3 (21) | 21.0 | |
| May 21, 2019, noon | 18.0 ppb (17) | 2.6 ppb (2) | N/A | 15.0 ppb (14) | N/A | N/A | 10.0 ppb (8) | 0.19 ppb (2) | 24.0 μg/m3 (22) | 5.8 μg/m3 (24) | 24.0 | |
| May 21, 2019, 11 a.m. | 10.1 ppb (9) | 1.0 ppb (1) | N/A | 9.0 ppb (8) | N/A | N/A | 18.0 ppb (14) | 0.12 ppb (1) | 14.0 μg/m3 (13) | 4.7 μg/m3 (20) | 20.0 | |
| May 21, 2019, 10 a.m. | 8.7 ppb (8) | 0.8 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | 22.0 ppb (17) | 0.1 ppb (1) | 16.0 μg/m3 (15) | 4.6 μg/m3 (19) | 19.0 | |
| May 21, 2019, 9 a.m. | 5.5 ppb (5) | 0.5 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 31.0 ppb (24) | 0.08 ppb (1) | 16.0 μg/m3 (15) | 4.9 μg/m3 (20) | 24.0 | |
| May 21, 2019, 8 a.m. | 7.2 ppb (7) | 0.7 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 24.0 ppb (18) | 0.1 ppb (1) | 14.0 μg/m3 (13) | 2.4 μg/m3 (10) | 18.0 | |
| May 21, 2019, 7 a.m. | 6.4 ppb (6) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 30.0 ppb (23) | 0.09 ppb (1) | 16.0 μg/m3 (15) | 3.2 μg/m3 (13) | 23.0 | |
| May 21, 2019, 6 a.m. | 5.3 ppb (5) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 35.0 ppb (27) | 0.08 ppb (1) | 10.0 μg/m3 (9) | 6.6 μg/m3 (28) | 28.0 | |
| May 21, 2019, 5 a.m. | 4.3 ppb (4) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 39.0 ppb (30) | 0.08 ppb (1) | 17.0 μg/m3 (15) | 5.4 μg/m3 (23) | 30.0 | |
| May 21, 2019, 4 a.m. | 4.1 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 41.0 ppb (32) | 0.09 ppb (1) | 15.0 μg/m3 (14) | 1.7 μg/m3 (7) | 32.0 | |
| May 21, 2019, 3 a.m. | 3.5 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 43.0 ppb (33) | 0.1 ppb (1) | 14.0 μg/m3 (13) | 0.9 μg/m3 (4) | 33.0 | |
| May 21, 2019, 2 a.m. | 4.2 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 46.0 ppb (35) | 0.1 ppb (1) | 18.0 μg/m3 (16) | 4.1 μg/m3 (17) | 35.0 | |
| May 21, 2019, 1 a.m. | 4.3 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 49.0 ppb (38) | 0.11 ppb (1) | 17.0 μg/m3 (15) | 4.1 μg/m3 (17) | 38.0 | |
| May 21, 2019, midnight | 4.6 ppb (4) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 52.0 ppb (40) | 0.11 ppb (1) | 23.0 μg/m3 (21) | 2.6 μg/m3 (11) | 40.0 | |
| May 20, 2019, 11 p.m. | 4.9 ppb (5) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 56.0 ppb (43) | 0.12 ppb (1) | 23.0 μg/m3 (21) | 4.3 μg/m3 (18) | 43.0 | |
| May 20, 2019, 10 p.m. | 5.7 ppb (5) | 1.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 56.0 ppb (43) | 0.13 ppb (1) | 19.0 μg/m3 (17) | 4.6 μg/m3 (19) | 43.0 | |
| May 20, 2019, 9 p.m. | 6.6 ppb (6) | 1.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 53.0 ppb (41) | 0.13 ppb (1) | 23.0 μg/m3 (21) | 4.6 μg/m3 (19) | 41.0 | |
| May 20, 2019, 8 p.m. | 5.4 ppb (5) | 1.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 52.0 ppb (40) | 0.12 ppb (1) | 19.0 μg/m3 (17) | 4.8 μg/m3 (20) | 40.0 | |
| May 20, 2019, 7 p.m. | 5.4 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 48.0 ppb (37) | 0.11 ppb (1) | 20.0 μg/m3 (18) | 6.6 μg/m3 (28) | 37.0 | |
| May 20, 2019, 6 p.m. | 6.6 ppb (6) | 1.7 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 44.0 ppb (34) | 0.11 ppb (1) | 15.0 μg/m3 (14) | 7.5 μg/m3 (31) | 34.0 | |
| May 20, 2019, 5 p.m. | 6.7 ppb (6) | 2.0 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 43.0 ppb (33) | 0.1 ppb (1) | 11.0 μg/m3 (10) | 4.6 μg/m3 (19) | 33.0 | |
| May 20, 2019, 4 p.m. | 6.2 ppb (6) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 42.0 ppb (32) | 0.1 ppb (1) | 8.0 μg/m3 (7) | 2.8 μg/m3 (12) | 32.0 | |
| May 20, 2019, 3 p.m. | 7.6 ppb (7) | 1.9 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 39.0 ppb (30) | 0.1 ppb (1) | 16.0 μg/m3 (15) | 3.6 μg/m3 (15) | 30.0 | |
| May 20, 2019, 2 p.m. | 8.8 ppb (8) | 1.8 ppb (2) | N/A | 7.0 ppb (6) | N/A | N/A | 33.0 ppb (25) | 0.15 ppb (2) | 18.0 μg/m3 (16) | 3.1 μg/m3 (13) | 25.0 | |
| May 20, 2019, 1 p.m. | 11.1 ppb (10) | 1.4 ppb (1) | N/A | 10.0 ppb (9) | N/A | N/A | 26.0 ppb (20) | 0.39 ppb (4) | 13.0 μg/m3 (12) | 4.8 μg/m3 (20) | 20.0 | |
| May 20, 2019, noon | 13.9 ppb (13) | 1.6 ppb (1) | N/A | 12.0 ppb (11) | N/A | N/A | 23.0 ppb (18) | 0.15 ppb (2) | 14.0 μg/m3 (13) | 5.1 μg/m3 (21) | 21.0 | |
| May 20, 2019, 11 a.m. | 4.5 ppb (4) | 0.5 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 36.0 ppb (28) | 0.08 ppb (1) | 17.0 μg/m3 (15) | 2.0 μg/m3 (8) | 28.0 | |
| May 20, 2019, 10 a.m. | 3.4 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 36.0 ppb (28) | 0.08 ppb (1) | 17.0 μg/m3 (15) | 1.4 μg/m3 (6) | 28.0 | |
| May 20, 2019, 9 a.m. | 2.7 ppb (3) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.07 ppb (1) | 8.0 μg/m3 (7) | 4.4 μg/m3 (18) | 29.0 | |
| May 20, 2019, 8 a.m. | 2.7 ppb (3) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.08 ppb (1) | 7.0 μg/m3 (6) | 5.4 μg/m3 (23) | 28.0 | |
| May 20, 2019, 7 a.m. | 2.1 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.07 ppb (1) | 11.0 μg/m3 (10) | 3.4 μg/m3 (14) | 32.0 | |
| May 20, 2019, 6 a.m. | 1.8 ppb (2) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.07 ppb (1) | 12.0 μg/m3 (11) | 2.2 μg/m3 (9) | 31.0 | |
| May 20, 2019, 5 a.m. | 3.3 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 35.0 ppb (27) | 0.08 ppb (1) | 13.0 μg/m3 (12) | 2.4 μg/m3 (10) | 27.0 | |
| May 20, 2019, 4 a.m. | 3.8 ppb (4) | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 38.0 ppb (29) | 0.08 ppb (1) | 14.0 μg/m3 (13) | 4.4 μg/m3 (18) | 29.0 | |
| May 20, 2019, 3 a.m. | 4.0 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 43.0 ppb (33) | 0.1 ppb (1) | 22.0 μg/m3 (20) | 5.6 μg/m3 (23) | 33.0 | |
| May 20, 2019, 2 a.m. | 4.2 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 44.0 ppb (34) | 0.1 ppb (1) | 20.0 μg/m3 (18) | 4.6 μg/m3 (19) | 34.0 | |
| May 20, 2019, 1 a.m. | 3.4 ppb (3) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 49.0 ppb (38) | 0.1 ppb (1) | 23.0 μg/m3 (21) | 4.3 μg/m3 (18) | 38.0 | |
| May 20, 2019, midnight | 3.3 ppb (3) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (39) | 0.08 ppb (1) | 27.0 μg/m3 (25) | 4.1 μg/m3 (17) | 39.0 |