Elizabeth NJ, US: 40.641441, -74.208366
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 21, 2019, 10 a.m. | 65.0 ppb (62) | 24.0 ppb (22) | N/A | 41.0 ppb (38) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 7.9 μg/m3 (33) | 62.0 | |
| March 21, 2019, 9 a.m. | 47.0 ppb (44) | 12.0 ppb (11) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | 9.9 μg/m3 (41) | 44.0 | |
| March 21, 2019, 8 a.m. | 38.0 ppb (35) | 7.0 ppb (6) | N/A | 30.0 ppb (28) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 21, 2019, 7 a.m. | 25.0 ppb (23) | 3.0 ppb (3) | N/A | 21.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 13.8 μg/m3 (54) | 54.0 | |
| March 21, 2019, 6 a.m. | 27.0 ppb (25) | 3.0 ppb (3) | N/A | 23.0 ppb (21) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 18.5 μg/m3 (64) | 64.0 | |
| March 21, 2019, 5 a.m. | 21.0 ppb (19) | 1.0 ppb (1) | N/A | 19.0 ppb (18) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 19.0 | |
| March 21, 2019, 4 a.m. | 29.0 ppb (27) | 2.0 ppb (2) | N/A | 25.0 ppb (23) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 10.5 μg/m3 (44) | 44.0 | |
| March 21, 2019, 3 a.m. | 38.0 ppb (35) | 4.0 ppb (4) | N/A | 33.0 ppb (31) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 21, 2019, 2 a.m. | 58.0 ppb (54) | 16.0 ppb (15) | N/A | 42.0 ppb (39) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 11.0 μg/m3 (46) | 54.0 | |
| March 21, 2019, 1 a.m. | 58.0 ppb (54) | 16.0 ppb (15) | N/A | 41.0 ppb (38) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 11.5 μg/m3 (48) | 54.0 | |
| March 21, 2019, midnight | 47.0 ppb (44) | 13.0 ppb (12) | N/A | 33.0 ppb (31) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 12.2 μg/m3 (50) | 50.0 | |
| March 20, 2019, 11 p.m. | 31.0 ppb (29) | 10.0 ppb (9) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 14.2 μg/m3 (55) | 55.0 | |
| March 20, 2019, 10 p.m. | 34.0 ppb (31) | 12.0 ppb (11) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 14.0 μg/m3 (54) | 54.0 | |
| March 20, 2019, 9 p.m. | 36.0 ppb (33) | 15.0 ppb (14) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 33.0 | |
| March 20, 2019, 8 p.m. | 40.0 ppb (37) | 15.0 ppb (14) | N/A | 23.0 ppb (21) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 6.8 μg/m3 (28) | 37.0 | |
| March 20, 2019, 7 p.m. | 40.0 ppb (37) | 16.0 ppb (15) | N/A | 22.0 ppb (20) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 7.0 μg/m3 (29) | 37.0 | |
| March 20, 2019, 6 p.m. | 49.0 ppb (45) | 22.0 ppb (20) | N/A | 27.0 ppb (25) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 6.6 μg/m3 (28) | 45.0 | |
| March 20, 2019, 5 p.m. | 52.0 ppb (48) | 25.0 ppb (23) | N/A | 26.0 ppb (24) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 8.8 μg/m3 (37) | 48.0 | |
| March 20, 2019, 4 p.m. | 69.0 ppb (66) | 36.0 ppb (33) | N/A | 32.0 ppb (30) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 11.6 μg/m3 (48) | 66.0 | |
| March 20, 2019, 3 p.m. | 83.0 ppb (81) | 45.0 ppb (42) | N/A | 37.0 ppb (34) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 17.3 μg/m3 (61) | 81.0 | |
| March 20, 2019, 2 p.m. | 94.0 ppb (93) | 55.0 ppb (51) | N/A | 39.0 ppb (36) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 22.2 μg/m3 (72) | 93.0 | |
| March 20, 2019, 1 p.m. | 143.0 ppb (108) | 94.0 ppb (93) | N/A | 47.0 ppb (44) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | N/A | 108.0 | |
| March 20, 2019, noon | 141.0 ppb (108) | 90.0 ppb (88) | N/A | 51.0 ppb (47) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | 23.5 μg/m3 (74) | 108.0 | |
| March 20, 2019, 11 a.m. | 197.0 ppb (118) | 140.0 ppb (108) | N/A | 56.0 ppb (52) | N/A | 1.0 ppb (1) | N/A | 0.5 ppb (6) | N/A | 23.4 μg/m3 (74) | 118.0 | |
| March 20, 2019, 10 a.m. | 178.0 ppb (115) | 124.0 ppb (104) | N/A | 54.0 ppb (50) | N/A | 0.0 ppb (0) | N/A | 0.6 ppb (7) | N/A | 20.5 μg/m3 (68) | 115.0 | |
| March 20, 2019, 9 a.m. | 109.0 ppb (102) | 59.0 ppb (55) | N/A | 49.0 ppb (45) | N/A | N/A | N/A | N/A | N/A | 19.5 μg/m3 (66) | 102.0 | |
| March 20, 2019, 8 a.m. | 51.0 ppb (47) | 9.0 ppb (8) | N/A | 41.0 ppb (38) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 19.3 μg/m3 (66) | 66.0 | |
| March 20, 2019, 7 a.m. | 74.0 ppb (71) | 27.0 ppb (25) | N/A | 46.0 ppb (43) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 18.1 μg/m3 (63) | 71.0 | |
| March 20, 2019, 6 a.m. | 42.0 ppb (39) | 6.0 ppb (6) | N/A | 35.0 ppb (32) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 16.1 μg/m3 (59) | 59.0 | |
| March 20, 2019, 5 a.m. | 31.0 ppb (29) | 6.0 ppb (6) | N/A | 25.0 ppb (23) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 29.0 | |
| March 20, 2019, 4 a.m. | 43.0 ppb (40) | 9.0 ppb (8) | N/A | 33.0 ppb (31) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 13.4 μg/m3 (53) | 53.0 | |
| March 20, 2019, 3 a.m. | 39.0 ppb (36) | 8.0 ppb (7) | N/A | 30.0 ppb (28) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 13.2 μg/m3 (53) | 53.0 | |
| March 20, 2019, 2 a.m. | 30.0 ppb (28) | 2.0 ppb (2) | N/A | 27.0 ppb (25) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 13.8 μg/m3 (54) | 54.0 | |
| March 20, 2019, 1 a.m. | 36.0 ppb (33) | 9.0 ppb (8) | N/A | 26.0 ppb (24) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 13.2 μg/m3 (53) | 53.0 | |
| March 20, 2019, midnight | 39.0 ppb (36) | 7.0 ppb (6) | N/A | 30.0 ppb (28) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 10.5 μg/m3 (44) | 44.0 | |
| March 19, 2019, 11 p.m. | 22.0 ppb (20) | 2.0 ppb (2) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 7.3 μg/m3 (30) | 30.0 | |
| March 19, 2019, 10 p.m. | 17.0 ppb (16) | 3.0 ppb (3) | N/A | 13.0 ppb (12) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 3.9 μg/m3 (16) | 16.0 | |
| March 19, 2019, 9 p.m. | 15.0 ppb (14) | 3.0 ppb (3) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | N/A | 14.0 | |
| March 19, 2019, 8 p.m. | 12.0 ppb (11) | 3.0 ppb (3) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | -2.2 μg/m3 (0) | 11.0 | |
| March 19, 2019, 7 p.m. | 13.0 ppb (12) | 4.0 ppb (4) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | -3.6 μg/m3 (0) | 12.0 | |
| March 19, 2019, 6 p.m. | 15.0 ppb (14) | 6.0 ppb (6) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | -2.1 μg/m3 (0) | 14.0 | |
| March 19, 2019, 5 p.m. | 23.0 ppb (21) | 10.0 ppb (9) | N/A | 12.0 ppb (11) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | -1.9 μg/m3 (0) | 21.0 | |
| March 19, 2019, 4 p.m. | 20.0 ppb (19) | 8.0 ppb (7) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | -0.8 μg/m3 (0) | 19.0 | |
| March 19, 2019, 3 p.m. | 19.0 ppb (18) | 7.0 ppb (6) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 1.7 μg/m3 (7) | 18.0 | |
| March 19, 2019, midnight | 20.0 ppb (19) | 1.0 ppb (1) | N/A | 18.0 ppb (17) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 18, 2019, 11 p.m. | 18.0 ppb (17) | 2.0 ppb (2) | N/A | 15.0 ppb (14) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 7.7 μg/m3 (32) | 32.0 | |
| March 18, 2019, 10 p.m. | 15.0 ppb (14) | 3.0 ppb (3) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| March 18, 2019, 9 p.m. | 21.0 ppb (19) | 7.0 ppb (6) | N/A | 13.0 ppb (12) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 19.0 | |
| March 18, 2019, 8 p.m. | 19.0 ppb (18) | 7.0 ppb (6) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 0.0 μg/m3 (0) | 18.0 | |
| March 18, 2019, 7 p.m. | 15.0 ppb (14) | 4.0 ppb (4) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | -2.7 μg/m3 (0) | 14.0 | |
| March 18, 2019, 6 p.m. | 16.0 ppb (15) | 6.0 ppb (6) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 15.0 | |
| March 18, 2019, 5 p.m. | 15.0 ppb (14) | 6.0 ppb (6) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | N/A | 14.0 | |
| March 18, 2019, 4 p.m. | 17.0 ppb (16) | 7.0 ppb (6) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | -3.3 μg/m3 (0) | 16.0 | |
| March 18, 2019, 3 p.m. | 16.0 ppb (15) | 6.0 ppb (6) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 0.0 μg/m3 (0) | 15.0 | |
| March 18, 2019, 2 p.m. | 22.0 ppb (20) | 9.0 ppb (8) | N/A | 13.0 ppb (12) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 3.1 μg/m3 (13) | 20.0 | |
| March 18, 2019, 1 p.m. | 25.0 ppb (23) | 9.0 ppb (8) | N/A | 15.0 ppb (14) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | N/A | 23.0 | |
| March 18, 2019, noon | 86.0 ppb (84) | 47.0 ppb (44) | N/A | 38.0 ppb (35) | N/A | 0.0 ppb (0) | N/A | 0.7 ppb (8) | N/A | 15.0 μg/m3 (56) | 84.0 | |
| March 18, 2019, 11 a.m. | 134.0 ppb (106) | 86.0 ppb (84) | N/A | 48.0 ppb (44) | N/A | 0.0 ppb (0) | N/A | 1.0 ppb (11) | N/A | 11.3 μg/m3 (47) | 106.0 | |
| March 18, 2019, 10 a.m. | 126.0 ppb (105) | 78.0 ppb (76) | N/A | 47.0 ppb (44) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.1 μg/m3 (42) | 105.0 | |
| March 18, 2019, 9 a.m. | 105.0 ppb (101) | 58.0 ppb (54) | N/A | 47.0 ppb (44) | N/A | N/A | N/A | N/A | N/A | 9.4 μg/m3 (39) | 101.0 | |
| March 18, 2019, 8 a.m. | 90.0 ppb (88) | 44.0 ppb (41) | N/A | 45.0 ppb (42) | N/A | N/A | N/A | 0.6 ppb (7) | N/A | 9.5 μg/m3 (40) | 88.0 | |
| March 18, 2019, 7 a.m. | 67.0 ppb (64) | 24.0 ppb (22) | N/A | 42.0 ppb (39) | N/A | 0.0 ppb (0) | N/A | 0.6 ppb (7) | N/A | 8.5 μg/m3 (35) | 64.0 | |
| March 18, 2019, 6 a.m. | 24.0 ppb (22) | 2.0 ppb (2) | N/A | 21.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.7 μg/m3 (32) | 32.0 | |
| March 18, 2019, 5 a.m. | 14.0 ppb (13) | 0.0 ppb (0) | N/A | 13.0 ppb (12) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | N/A | 13.0 | |
| March 18, 2019, 4 a.m. | 13.0 ppb (12) | 1.0 ppb (1) | N/A | 12.0 ppb (11) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.8 μg/m3 (32) | 32.0 | |
| March 18, 2019, 3 a.m. | 8.0 ppb (7) | 0.0 ppb (0) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 8.5 μg/m3 (35) | 35.0 | |
| March 18, 2019, 2 a.m. | 9.0 ppb (8) | 0.0 ppb (0) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 8.4 μg/m3 (35) | 35.0 | |
| March 18, 2019, 1 a.m. | 9.0 ppb (8) | 0.0 ppb (0) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 8.1 μg/m3 (34) | 34.0 | |
| March 18, 2019, midnight | 8.0 ppb (7) | 0.0 ppb (0) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 7.4 μg/m3 (31) | 31.0 | |
| March 17, 2019, 11 p.m. | 9.0 ppb (8) | 0.0 ppb (0) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 3.8 μg/m3 (16) | 16.0 | |
| March 17, 2019, 10 p.m. | 4.0 ppb (4) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | -0.2 μg/m3 (0) | 4.0 | |
| March 17, 2019, 9 p.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 3.0 | |
| March 17, 2019, 8 p.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | -2.7 μg/m3 (0) | 3.0 | |
| March 17, 2019, 7 p.m. | 3.0 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | -0.8 μg/m3 (0) | 3.0 | |
| March 17, 2019, 6 p.m. | 3.0 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 17, 2019, 5 p.m. | 3.0 ppb (3) | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 2.1 μg/m3 (9) | 9.0 | |
| March 17, 2019, 4 p.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | -1.9 μg/m3 (0) | 3.0 | |
| March 17, 2019, 3 p.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | -0.4 μg/m3 (0) | 3.0 | |
| March 17, 2019, 2 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 1.3 μg/m3 (5) | 5.0 | |
| March 17, 2019, 1 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 5.0 | |
| March 17, 2019, noon | 19.0 ppb (18) | 3.0 ppb (3) | N/A | 15.0 ppb (14) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 5.1 μg/m3 (21) | 21.0 | |
| March 17, 2019, 11 a.m. | 25.0 ppb (23) | 2.0 ppb (2) | N/A | 21.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 5.7 μg/m3 (24) | 24.0 | |
| March 17, 2019, 10 a.m. | 22.0 ppb (20) | 2.0 ppb (2) | N/A | 19.0 ppb (18) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| March 17, 2019, 9 a.m. | 18.0 ppb (17) | 1.0 ppb (1) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 4.9 μg/m3 (20) | 20.0 | |
| March 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 5.8 μg/m3 (24) | 24.0 | |
| March 17, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 10.9 μg/m3 (45) | 45.0 | |
| March 17, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 7.9 μg/m3 (33) | 33.0 | |
| March 17, 2019, 5 a.m. | 4.0 ppb (4) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 4.0 | |
| March 17, 2019, 4 a.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 0.3 μg/m3 (1) | 3.0 | |
| March 17, 2019, 3 a.m. | 4.0 ppb (4) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 4.2 μg/m3 (18) | 18.0 | |
| March 17, 2019, 2 a.m. | 5.0 ppb (5) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 11.3 μg/m3 (47) | 47.0 | |
| March 17, 2019, 1 a.m. | 7.0 ppb (6) | 0.0 ppb (0) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| March 17, 2019, midnight | 7.0 ppb (6) | 0.0 ppb (0) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 9.6 μg/m3 (40) | 40.0 | |
| March 16, 2019, 11 p.m. | 6.0 ppb (6) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 10.8 μg/m3 (45) | 45.0 | |
| March 16, 2019, 10 p.m. | 5.0 ppb (5) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 11.3 μg/m3 (47) | 47.0 | |
| March 16, 2019, 9 p.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 3.0 | |
| March 16, 2019, 8 p.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | -2.3 μg/m3 (0) | 3.0 | |
| March 16, 2019, 7 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | -3.3 μg/m3 (0) | 5.0 | |
| March 16, 2019, 6 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | -2.8 μg/m3 (0) | 5.0 | |
| March 16, 2019, 5 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | -1.8 μg/m3 (0) | 5.0 | |
| March 16, 2019, 4 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 0.1 μg/m3 (0) | 5.0 | |
| March 16, 2019, 3 p.m. | 6.0 ppb (6) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 3.5 μg/m3 (15) | 15.0 | |
| March 16, 2019, 2 p.m. | 4.0 ppb (4) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 1.7 μg/m3 (7) | 7.0 | |
| March 16, 2019, 1 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 5.0 | |
| March 16, 2019, noon | 6.0 ppb (6) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 1.6 μg/m3 (7) | 7.0 | |
| March 16, 2019, 11 a.m. | 12.0 ppb (11) | 3.0 ppb (3) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 2.0 μg/m3 (8) | 11.0 | |
| March 16, 2019, 10 a.m. | 9.0 ppb (8) | 2.0 ppb (2) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 2.9 μg/m3 (12) | 12.0 | |
| March 16, 2019, 9 a.m. | 6.0 ppb (6) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 3.8 μg/m3 (16) | 16.0 | |
| March 16, 2019, 8 a.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| March 16, 2019, 7 a.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 10.4 μg/m3 (43) | 43.0 | |
| March 16, 2019, 6 a.m. | 6.0 ppb (6) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 18.6 μg/m3 (64) | 64.0 | |
| March 16, 2019, 5 a.m. | 6.0 ppb (6) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 6.0 | |
| March 16, 2019, 4 a.m. | 5.0 ppb (5) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | 19.6 μg/m3 (66) | 66.0 | |
| March 16, 2019, 3 a.m. | 8.0 ppb (7) | 0.0 ppb (0) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 11.8 μg/m3 (49) | 49.0 | |
| March 16, 2019, 2 a.m. | 13.0 ppb (12) | 1.0 ppb (1) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 14.5 μg/m3 (55) | 55.0 | |
| March 16, 2019, 1 a.m. | 13.0 ppb (12) | 2.0 ppb (2) | N/A | 10.0 ppb (9) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 10.6 μg/m3 (44) | 44.0 | |
| March 16, 2019, midnight | 13.0 ppb (12) | 3.0 ppb (3) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 7.7 μg/m3 (32) | 32.0 | |
| March 15, 2019, 11 p.m. | 27.0 ppb (25) | 7.0 ppb (6) | N/A | 19.0 ppb (18) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.2 μg/m3 (30) | 30.0 | |
| March 15, 2019, 10 p.m. | 36.0 ppb (33) | 11.0 ppb (10) | N/A | 24.0 ppb (22) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.0 μg/m3 (29) | 33.0 | |
| March 15, 2019, 9 p.m. | 31.0 ppb (29) | 11.0 ppb (10) | N/A | 19.0 ppb (18) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | N/A | 29.0 | |
| March 15, 2019, 8 p.m. | 25.0 ppb (23) | 8.0 ppb (7) | N/A | 16.0 ppb (15) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.2 μg/m3 (30) | 30.0 | |
| March 15, 2019, 7 p.m. | 22.0 ppb (20) | 7.0 ppb (6) | N/A | 14.0 ppb (13) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 6.2 μg/m3 (26) | 26.0 | |
| March 15, 2019, 6 p.m. | 27.0 ppb (25) | 10.0 ppb (9) | N/A | 16.0 ppb (15) | N/A | 0.0 ppb (0) | N/A | 0.6 ppb (7) | N/A | 5.7 μg/m3 (24) | 25.0 | |
| March 15, 2019, 5 p.m. | 30.0 ppb (28) | 12.0 ppb (11) | N/A | 17.0 ppb (16) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.7 μg/m3 (32) | 32.0 | |
| March 15, 2019, 4 p.m. | 26.0 ppb (24) | 10.0 ppb (9) | N/A | 15.0 ppb (14) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 13.5 μg/m3 (53) | 53.0 | |
| March 15, 2019, 3 p.m. | 25.0 ppb (23) | 10.0 ppb (9) | N/A | 14.0 ppb (13) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 21.9 μg/m3 (71) | 71.0 | |
| March 15, 2019, 2 p.m. | 28.0 ppb (26) | 11.0 ppb (10) | N/A | 16.0 ppb (15) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 26.9 μg/m3 (82) | 82.0 | |
| March 15, 2019, 1 p.m. | 57.0 ppb (53) | 28.0 ppb (26) | N/A | 28.0 ppb (26) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | N/A | 53.0 | |
| March 15, 2019, noon | 88.0 ppb (86) | 46.0 ppb (43) | N/A | 41.0 ppb (38) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | 1.3 μg/m3 (5) | 86.0 | |
| March 15, 2019, 11 a.m. | 96.0 ppb (95) | 52.0 ppb (48) | N/A | 43.0 ppb (40) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | 1.8 μg/m3 (8) | 95.0 | |
| March 15, 2019, 10 a.m. | 116.0 ppb (103) | 67.0 ppb (64) | N/A | 48.0 ppb (44) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | 9.9 μg/m3 (41) | 103.0 | |
| March 15, 2019, 9 a.m. | 159.0 ppb (111) | 102.0 ppb (100) | N/A | 56.0 ppb (52) | N/A | N/A | N/A | N/A | N/A | 14.3 μg/m3 (55) | 111.0 | |
| March 15, 2019, 8 a.m. | 131.0 ppb (106) | 75.0 ppb (72) | N/A | 56.0 ppb (52) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | 11.6 μg/m3 (48) | 106.0 | |
| March 15, 2019, 7 a.m. | 99.0 ppb (98) | 43.0 ppb (40) | N/A | 55.0 ppb (51) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | 10.1 μg/m3 (42) | 98.0 | |
| March 15, 2019, 6 a.m. | 74.0 ppb (71) | 24.0 ppb (22) | N/A | 50.0 ppb (46) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.7 μg/m3 (32) | 71.0 | |
| March 15, 2019, 5 a.m. | 64.0 ppb (61) | 18.0 ppb (17) | N/A | 46.0 ppb (43) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | N/A | 61.0 | |
| March 15, 2019, 4 a.m. | 63.0 ppb (60) | 17.0 ppb (16) | N/A | 45.0 ppb (42) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.9 μg/m3 (33) | 60.0 | |
| March 15, 2019, 3 a.m. | 52.0 ppb (48) | 11.0 ppb (10) | N/A | 40.0 ppb (37) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 7.4 μg/m3 (31) | 48.0 | |
| March 15, 2019, 2 a.m. | 35.0 ppb (32) | 5.0 ppb (5) | N/A | 30.0 ppb (28) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 12.9 μg/m3 (52) | 52.0 | |
| March 15, 2019, 1 a.m. | 39.0 ppb (36) | 8.0 ppb (7) | N/A | 31.0 ppb (29) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 20.3 μg/m3 (68) | 68.0 | |
| March 15, 2019, midnight | 40.0 ppb (37) | 7.0 ppb (6) | N/A | 31.0 ppb (29) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 23.5 μg/m3 (74) | 74.0 | |
| March 14, 2019, 11 p.m. | 44.0 ppb (41) | 8.0 ppb (7) | N/A | 34.0 ppb (31) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 20.2 μg/m3 (67) | 67.0 | |
| March 14, 2019, 10 p.m. | 56.0 ppb (52) | 15.0 ppb (14) | N/A | 41.0 ppb (38) | N/A | 0.0 ppb (0) | N/A | 0.5 ppb (6) | N/A | 18.2 μg/m3 (63) | 63.0 | |
| March 14, 2019, 9 p.m. | 36.0 ppb (33) | 8.0 ppb (7) | N/A | 28.0 ppb (26) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 10.1 μg/m3 (42) | 42.0 | |
| March 14, 2019, 8 p.m. | 38.0 ppb (35) | 11.0 ppb (10) | N/A | 26.0 ppb (24) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 6.5 μg/m3 (27) | 35.0 | |
| March 14, 2019, 7 p.m. | 30.0 ppb (28) | 9.0 ppb (8) | N/A | 19.0 ppb (18) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | N/A | 28.0 | |
| March 14, 2019, 6 p.m. | 32.0 ppb (30) | 11.0 ppb (10) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 30.0 | |
| March 14, 2019, 5 p.m. | 33.0 ppb (31) | 12.0 ppb (11) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 31.0 | |
| March 14, 2019, 4 p.m. | 39.0 ppb (36) | 15.0 ppb (14) | N/A | 23.0 ppb (21) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 36.0 | |
| March 14, 2019, 3 p.m. | 47.0 ppb (44) | 19.0 ppb (18) | N/A | 27.0 ppb (25) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 6.2 μg/m3 (26) | 44.0 | |
| March 14, 2019, 2 p.m. | 42.0 ppb (39) | 17.0 ppb (16) | N/A | 24.0 ppb (22) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 6.1 μg/m3 (25) | 39.0 | |
| March 14, 2019, 1 p.m. | 64.0 ppb (61) | 32.0 ppb (30) | N/A | 32.0 ppb (30) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 61.0 | |
| March 14, 2019, noon | 73.0 ppb (70) | 32.0 ppb (30) | N/A | 40.0 ppb (37) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 8.3 μg/m3 (35) | 70.0 | |
| March 14, 2019, 11 a.m. | 77.0 ppb (74) | 31.0 ppb (29) | N/A | 45.0 ppb (42) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 8.6 μg/m3 (36) | 74.0 | |
| March 14, 2019, 10 a.m. | 70.0 ppb (67) | 25.0 ppb (23) | N/A | 44.0 ppb (41) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 8.5 μg/m3 (35) | 67.0 | |
| March 14, 2019, 9 a.m. | 70.0 ppb (67) | 27.0 ppb (25) | N/A | 43.0 ppb (40) | N/A | N/A | N/A | N/A | N/A | 7.6 μg/m3 (32) | 67.0 | |
| March 14, 2019, 8 a.m. | 56.0 ppb (52) | 15.0 ppb (14) | N/A | 40.0 ppb (37) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 6.4 μg/m3 (27) | 52.0 | |
| March 14, 2019, 7 a.m. | 56.0 ppb (52) | 15.0 ppb (14) | N/A | 41.0 ppb (38) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 5.7 μg/m3 (24) | 52.0 | |
| March 14, 2019, 6 a.m. | 35.0 ppb (32) | 8.0 ppb (7) | N/A | 26.0 ppb (24) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 6.5 μg/m3 (27) | 32.0 | |
| March 14, 2019, 5 a.m. | 37.0 ppb (34) | 8.0 ppb (7) | N/A | 29.0 ppb (27) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | N/A | 34.0 | |
| March 14, 2019, 4 a.m. | 31.0 ppb (29) | 3.0 ppb (3) | N/A | 27.0 ppb (25) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 12.6 μg/m3 (51) | 51.0 | |
| March 14, 2019, 3 a.m. | 38.0 ppb (35) | 8.0 ppb (7) | N/A | 29.0 ppb (27) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 17.6 μg/m3 (62) | 62.0 | |
| March 14, 2019, 2 a.m. | 43.0 ppb (40) | 8.0 ppb (7) | N/A | 33.0 ppb (31) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 24.9 μg/m3 (77) | 77.0 | |
| March 14, 2019, 1 a.m. | 48.0 ppb (44) | 13.0 ppb (12) | N/A | 35.0 ppb (32) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 24.3 μg/m3 (76) | 76.0 | |
| March 14, 2019, midnight | 55.0 ppb (51) | 16.0 ppb (15) | N/A | 38.0 ppb (35) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 11.5 μg/m3 (48) | 51.0 | |
| March 13, 2019, 11 p.m. | 55.0 ppb (51) | 18.0 ppb (17) | N/A | 37.0 ppb (34) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 14.1 μg/m3 (54) | 54.0 | |
| March 13, 2019, 10 p.m. | 61.0 ppb (57) | 21.0 ppb (19) | N/A | 39.0 ppb (36) | N/A | 0.0 ppb (0) | N/A | 0.4 ppb (4) | N/A | 17.1 μg/m3 (61) | 61.0 | |
| March 13, 2019, 9 p.m. | 53.0 ppb (49) | 19.0 ppb (18) | N/A | 34.0 ppb (31) | N/A | 0.0 ppb (0) | N/A | 0.3 ppb (3) | N/A | 18.8 μg/m3 (64) | 64.0 |