El Paso City Limits TX, US: 31.768056, -106.501111
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 20, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 64.0 μg/m3 (54) | 11.2 μg/m3 (47) | 54.0 | |
| May 20, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 36.0 μg/m3 (33) | 8.0 μg/m3 (33) | 36.0 | |
| May 20, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | 25.0 μg/m3 (23) | 5.3 μg/m3 (22) | 41.0 | |
| May 19, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | 22.0 μg/m3 (20) | 4.7 μg/m3 (20) | 42.0 | |
| May 19, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | 20.0 μg/m3 (18) | 4.2 μg/m3 (18) | 43.0 | |
| May 19, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | 26.0 μg/m3 (24) | 4.0 μg/m3 (17) | 45.0 | |
| May 19, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | 18.0 μg/m3 (16) | 3.6 μg/m3 (15) | 47.0 | |
| May 19, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | 18.0 μg/m3 (16) | 3.5 μg/m3 (15) | 46.0 | |
| May 19, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | 26.0 μg/m3 (24) | 4.9 μg/m3 (20) | 48.0 | |
| May 19, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | 30.0 μg/m3 (27) | 4.3 μg/m3 (18) | 45.0 | |
| May 19, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 31.0 μg/m3 (28) | 4.8 μg/m3 (20) | 38.0 | |
| May 19, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 42.0 μg/m3 (38) | 7.3 μg/m3 (30) | 38.0 | |
| May 19, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 21.0 μg/m3 (19) | 3.9 μg/m3 (16) | 34.0 | |
| May 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 21.0 μg/m3 (19) | 4.8 μg/m3 (20) | 32.0 | |
| May 19, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 18.0 μg/m3 (16) | 6.5 μg/m3 (27) | 28.0 | |
| May 19, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 20.0 μg/m3 (18) | 7.7 μg/m3 (32) | 32.0 | |
| May 19, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | 23.0 μg/m3 (21) | 8.3 μg/m3 (35) | 35.0 | |
| May 19, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | 19.0 μg/m3 (17) | 6.8 μg/m3 (28) | 31.0 | |
| May 19, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 27.0 μg/m3 (25) | 9.2 μg/m3 (38) | 38.0 | |
| May 19, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 26.0 μg/m3 (24) | 8.4 μg/m3 (35) | 35.0 | |
| May 19, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 35.0 μg/m3 (32) | 7.7 μg/m3 (32) | 32.0 | |
| May 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 75.0 μg/m3 (60) | 11.1 μg/m3 (46) | 60.0 | |
| May 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 μg/m3 (21) | 6.7 μg/m3 (28) | 28.0 | |
| May 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | 67.0 μg/m3 (56) | 8.5 μg/m3 (35) | 56.0 | |
| May 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | 43.0 μg/m3 (39) | 7.7 μg/m3 (32) | 48.0 | |
| May 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 ppb (49) | N/A | 26.0 μg/m3 (24) | 5.7 μg/m3 (24) | 49.0 | |
| May 19, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | 29.0 μg/m3 (26) | 5.6 μg/m3 (23) | 46.0 | |
| May 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | 37.0 μg/m3 (34) | 5.5 μg/m3 (23) | 48.0 | |
| May 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | 39.0 μg/m3 (35) | 6.6 μg/m3 (28) | 48.0 | |
| May 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | 48.0 μg/m3 (44) | 5.5 μg/m3 (23) | 47.0 | |
| May 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | 43.0 μg/m3 (39) | 5.0 μg/m3 (21) | 44.0 | |
| May 18, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | 31.0 μg/m3 (28) | 3.8 μg/m3 (16) | 44.0 | |
| May 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | 42.0 μg/m3 (38) | 4.3 μg/m3 (18) | 43.0 | |
| May 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | 54.0 μg/m3 (49) | 4.5 μg/m3 (19) | 49.0 | |
| May 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | 49.0 μg/m3 (45) | 5.9 μg/m3 (25) | 45.0 | |
| May 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | 31.0 μg/m3 (28) | 3.8 μg/m3 (16) | 42.0 | |
| May 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | 26.0 μg/m3 (24) | 3.3 μg/m3 (14) | 42.0 | |
| May 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | 38.0 μg/m3 (35) | 6.2 μg/m3 (26) | 35.0 | |
| May 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | 34.0 μg/m3 (31) | 7.1 μg/m3 (30) | 31.0 | |
| May 18, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 34.0 μg/m3 (31) | 8.9 μg/m3 (37) | 37.0 | |
| May 18, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 32.0 μg/m3 (29) | 8.5 μg/m3 (35) | 35.0 | |
| May 18, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 32.0 μg/m3 (29) | 7.8 μg/m3 (32) | 32.0 | |
| May 18, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 34.0 μg/m3 (31) | 8.2 μg/m3 (34) | 34.0 | |
| May 18, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 32.0 μg/m3 (29) | 7.4 μg/m3 (31) | 31.0 | |
| May 18, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 32.0 μg/m3 (29) | 8.8 μg/m3 (37) | 37.0 | |
| May 18, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 33.0 μg/m3 (30) | 8.3 μg/m3 (35) | 35.0 | |
| May 18, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 25.0 μg/m3 (23) | 8.0 μg/m3 (33) | 34.0 | |
| May 18, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 31.0 μg/m3 (28) | 10.9 μg/m3 (45) | 45.0 | |
| May 18, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 28.0 μg/m3 (25) | 7.1 μg/m3 (30) | 35.0 | |
| May 18, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 94.0 μg/m3 (70) | 11.3 μg/m3 (47) | 70.0 | |
| May 17, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | 123.0 μg/m3 (84) | 13.9 μg/m3 (54) | 84.0 | |
| May 17, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | 141.0 μg/m3 (93) | 15.6 μg/m3 (58) | 93.0 | |
| May 17, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | 151.0 μg/m3 (98) | 20.7 μg/m3 (69) | 98.0 | |
| May 17, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 178.0 μg/m3 (112) | 19.5 μg/m3 (66) | 112.0 | |
| May 17, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 184.0 μg/m3 (114) | 20.0 μg/m3 (67) | 114.0 | |
| May 17, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 117.0 μg/m3 (81) | 11.5 μg/m3 (48) | 81.0 | |
| May 17, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 148.0 μg/m3 (96) | 13.1 μg/m3 (52) | 96.0 | |
| May 17, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | 170.0 μg/m3 (108) | 15.2 μg/m3 (57) | 108.0 | |
| May 17, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 88.0 μg/m3 (66) | 7.7 μg/m3 (32) | 66.0 | |
| May 17, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 158.0 μg/m3 (102) | 11.1 μg/m3 (46) | 102.0 | |
| May 17, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 42.0 μg/m3 (38) | 9.0 μg/m3 (38) | 38.0 | |
| May 17, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 37.0 μg/m3 (34) | 6.3 μg/m3 (26) | 34.0 | |
| May 17, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 36.0 μg/m3 (33) | 6.5 μg/m3 (27) | 33.0 | |
| May 17, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | 29.0 μg/m3 (26) | 8.8 μg/m3 (37) | 37.0 | |
| May 17, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 36.0 μg/m3 (33) | 9.6 μg/m3 (40) | 40.0 | |
| May 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 29.0 μg/m3 (26) | 6.2 μg/m3 (26) | 30.0 | |
| May 17, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | 42.0 μg/m3 (38) | 10.1 μg/m3 (42) | 42.0 | |
| May 17, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 35.0 μg/m3 (32) | 9.7 μg/m3 (40) | 40.0 | |
| May 17, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 38.0 μg/m3 (35) | 7.0 μg/m3 (29) | 35.0 | |
| May 17, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 48.0 μg/m3 (44) | 10.7 μg/m3 (45) | 45.0 | |
| May 17, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 73.0 μg/m3 (59) | 15.6 μg/m3 (58) | 59.0 | |
| May 17, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | 84.0 μg/m3 (64) | 11.8 μg/m3 (49) | 64.0 | |
| May 17, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | 73.0 μg/m3 (59) | 9.5 μg/m3 (40) | 59.0 | |
| May 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | 22.0 μg/m3 (20) | 5.1 μg/m3 (21) | 42.0 | |
| May 16, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | 20.0 μg/m3 (18) | 4.7 μg/m3 (20) | 43.0 | |
| May 16, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | 21.0 μg/m3 (19) | 6.2 μg/m3 (26) | 42.0 | |
| May 16, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | 17.0 μg/m3 (15) | 4.6 μg/m3 (19) | 40.0 | |
| May 16, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | 22.0 μg/m3 (20) | 4.9 μg/m3 (20) | 42.0 | |
| May 16, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | 18.0 μg/m3 (16) | 4.7 μg/m3 (20) | 41.0 | |
| May 16, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | 19.0 μg/m3 (17) | 7.0 μg/m3 (29) | 38.0 | |
| May 16, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | 29.0 μg/m3 (26) | 4.6 μg/m3 (19) | 37.0 | |
| May 16, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 47.0 μg/m3 (43) | 6.7 μg/m3 (28) | 43.0 | |
| May 16, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 53.0 μg/m3 (48) | 10.9 μg/m3 (45) | 48.0 | |
| May 16, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 44.0 μg/m3 (40) | 9.8 μg/m3 (41) | 41.0 | |
| May 16, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 37.0 μg/m3 (34) | 7.3 μg/m3 (30) | 34.0 | |
| May 16, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 31.0 μg/m3 (28) | 8.5 μg/m3 (35) | 35.0 | |
| May 16, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 23.0 μg/m3 (21) | 7.8 μg/m3 (32) | 32.0 | |
| May 16, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | 20.0 μg/m3 (18) | 7.7 μg/m3 (32) | 32.0 | |
| May 16, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 20.0 μg/m3 (18) | 8.4 μg/m3 (35) | 35.0 | |
| May 16, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 20.0 μg/m3 (18) | 6.8 μg/m3 (28) | 34.0 | |
| May 16, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 20.0 μg/m3 (18) | 9.0 μg/m3 (38) | 38.0 | |
| May 16, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 26.0 μg/m3 (24) | 7.0 μg/m3 (29) | 29.0 | |
| May 16, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 29.0 μg/m3 (26) | 7.9 μg/m3 (33) | 33.0 | |
| May 16, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (8) | N/A | 51.0 μg/m3 (46) | 15.5 μg/m3 (57) | 57.0 | |
| May 16, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 59.0 μg/m3 (52) | 13.0 μg/m3 (52) | 52.0 | |
| May 16, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 32.0 μg/m3 (29) | 9.0 μg/m3 (38) | 38.0 | |
| May 16, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | 25.0 μg/m3 (23) | 5.8 μg/m3 (24) | 38.0 | |
| May 16, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | 18.0 μg/m3 (16) | 6.0 μg/m3 (25) | 47.0 | |
| May 15, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | 17.0 μg/m3 (15) | 5.3 μg/m3 (22) | 47.0 | |
| May 15, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 ppb (48) | N/A | 19.0 μg/m3 (17) | 8.6 μg/m3 (36) | 48.0 | |
| May 15, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 65.0 ppb (50) | N/A | 19.0 μg/m3 (17) | 6.1 μg/m3 (25) | 50.0 | |
| May 15, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 67.0 ppb (52) | N/A | 19.0 μg/m3 (17) | 6.2 μg/m3 (26) | 52.0 | |
| May 15, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 69.0 ppb (53) | N/A | 18.0 μg/m3 (16) | 5.8 μg/m3 (24) | 53.0 | |
| May 15, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 66.0 ppb (51) | N/A | 17.0 μg/m3 (15) | 2.3 μg/m3 (10) | 51.0 | |
| May 15, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 ppb (48) | N/A | 27.0 μg/m3 (25) | 4.0 μg/m3 (17) | 48.0 | |
| May 15, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | 42.0 μg/m3 (38) | 4.4 μg/m3 (18) | 41.0 | |
| May 15, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 μg/m3 (41) | 7.0 μg/m3 (29) | 41.0 | |
| May 15, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 30.0 μg/m3 (27) | 8.8 μg/m3 (37) | 37.0 | |
| May 15, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 39.0 μg/m3 (35) | 9.7 μg/m3 (40) | 40.0 | |
| May 15, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 30.0 μg/m3 (27) | 7.8 μg/m3 (32) | 32.0 | |
| May 15, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 28.0 μg/m3 (25) | 8.4 μg/m3 (35) | 35.0 | |
| May 15, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 21.0 μg/m3 (19) | 8.7 μg/m3 (36) | 36.0 | |
| May 15, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 18.0 μg/m3 (16) | 7.1 μg/m3 (30) | 30.0 | |
| May 15, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 17.0 μg/m3 (15) | 6.4 μg/m3 (27) | 28.0 | |
| May 15, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 22.0 μg/m3 (20) | 9.6 μg/m3 (40) | 40.0 | |
| May 15, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 36.0 μg/m3 (33) | 9.5 μg/m3 (40) | 40.0 | |
| May 15, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 65.0 μg/m3 (55) | 14.3 μg/m3 (55) | 55.0 | |
| May 15, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 63.0 μg/m3 (54) | 15.2 μg/m3 (57) | 57.0 | |
| May 15, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 73.0 μg/m3 (59) | 14.7 μg/m3 (56) | 59.0 | |
| May 15, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 33.0 μg/m3 (30) | 10.3 μg/m3 (43) | 43.0 | |
| May 15, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 69.0 ppb (53) | N/A | 24.0 μg/m3 (22) | 8.0 μg/m3 (33) | 53.0 | |
| May 15, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 71.0 ppb (55) | N/A | 20.0 μg/m3 (18) | 9.6 μg/m3 (40) | 55.0 | |
| May 14, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 69.0 ppb (53) | N/A | 19.0 μg/m3 (17) | 7.5 μg/m3 (31) | 53.0 | |
| May 14, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 ppb (49) | N/A | 14.0 μg/m3 (13) | 4.9 μg/m3 (20) | 49.0 | |
| May 14, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | 13.0 μg/m3 (12) | 7.1 μg/m3 (30) | 48.0 | |
| May 14, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | 14.0 μg/m3 (13) | 2.4 μg/m3 (10) | 45.0 | |
| May 14, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (10) | 6.1 μg/m3 (25) | 25.0 | |
| May 14, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (14) | 5.2 μg/m3 (22) | 22.0 | |
| May 14, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | 16.0 μg/m3 (15) | 4.9 μg/m3 (20) | 39.0 | |
| May 14, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 21.0 μg/m3 (19) | 3.4 μg/m3 (14) | 35.0 | |
| May 14, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 37.0 μg/m3 (34) | 6.4 μg/m3 (27) | 34.0 | |
| May 14, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | N/A | 65.0 μg/m3 (55) | 14.8 μg/m3 (56) | 56.0 | |
| May 14, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (6) | N/A | 47.0 μg/m3 (43) | 10.0 μg/m3 (42) | 43.0 | |
| May 14, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (6) | N/A | 36.0 μg/m3 (33) | 11.0 μg/m3 (46) | 46.0 | |
| May 14, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (5) | N/A | 33.0 μg/m3 (30) | 9.3 μg/m3 (39) | 39.0 | |
| May 14, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 35.0 μg/m3 (32) | 11.4 μg/m3 (48) | 48.0 | |
| May 14, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 22.0 μg/m3 (20) | 7.8 μg/m3 (32) | 32.0 | |
| May 14, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 21.0 μg/m3 (19) | 7.9 μg/m3 (33) | 33.0 | |
| May 14, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 24.0 μg/m3 (22) | 9.7 μg/m3 (40) | 40.0 | |
| May 14, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 33.0 μg/m3 (30) | 8.4 μg/m3 (35) | 35.0 | |
| May 14, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 42.0 μg/m3 (38) | 10.4 μg/m3 (43) | 43.0 | |
| May 14, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 47.0 μg/m3 (43) | 10.8 μg/m3 (45) | 45.0 | |
| May 14, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 36.0 μg/m3 (33) | 8.8 μg/m3 (37) | 37.0 | |
| May 14, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 27.0 μg/m3 (25) | 6.4 μg/m3 (27) | 34.0 | |
| May 14, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 31.0 μg/m3 (28) | 5.5 μg/m3 (23) | 36.0 | |
| May 14, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | 21.0 μg/m3 (19) | 7.2 μg/m3 (30) | 40.0 | |
| May 13, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | 13.0 μg/m3 (12) | 4.8 μg/m3 (20) | 43.0 | |
| May 13, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | 13.0 μg/m3 (12) | 6.1 μg/m3 (25) | 45.0 | |
| May 13, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | 12.0 μg/m3 (11) | 5.8 μg/m3 (24) | 45.0 | |
| May 13, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | 11.0 μg/m3 (10) | 1.6 μg/m3 (7) | 42.0 | |
| May 13, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | 10.0 μg/m3 (9) | 2.3 μg/m3 (10) | 42.0 | |
| May 13, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | 12.0 μg/m3 (11) | 0.8 μg/m3 (3) | 42.0 | |
| May 13, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 20.0 μg/m3 (18) | 5.3 μg/m3 (22) | 38.0 | |
| May 13, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 23.0 μg/m3 (21) | 4.3 μg/m3 (18) | 25.0 | |
| May 13, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 19.0 μg/m3 (17) | 4.5 μg/m3 (19) | 21.0 | |
| May 13, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 21.0 μg/m3 (19) | 2.9 μg/m3 (12) | 19.0 | |
| May 13, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 24.0 μg/m3 (22) | 8.8 μg/m3 (37) | 37.0 | |
| May 13, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 18.0 μg/m3 (16) | 9.2 μg/m3 (38) | 38.0 | |
| May 13, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 12.0 μg/m3 (11) | 7.9 μg/m3 (33) | 33.0 | |
| May 13, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | 14.0 μg/m3 (13) | 10.5 μg/m3 (44) | 44.0 | |
| May 13, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 14.0 μg/m3 (13) | 4.8 μg/m3 (20) | 28.0 | |
| May 13, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 13.0 μg/m3 (12) | 5.3 μg/m3 (22) | 34.0 | |
| May 13, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | 7.0 μg/m3 (6) | 3.0 μg/m3 (12) | 38.0 | |
| May 13, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 12.0 μg/m3 (11) | 5.1 μg/m3 (21) | 35.0 | |
| May 13, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 11.0 μg/m3 (10) | 5.1 μg/m3 (21) | 35.0 | |
| May 13, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 14.0 μg/m3 (13) | 4.3 μg/m3 (18) | 33.0 | |
| May 13, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | 20.0 μg/m3 (18) | 6.2 μg/m3 (26) | 29.0 | |
| May 13, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | 20.0 μg/m3 (18) | 8.3 μg/m3 (35) | 37.0 |