AQSQID: 401431127

Site Name: Tulsa

Location: Tulsa (N Peoria Ave), OK

Reporting: True, Located: True

Current AQI: 53.0

Tulsa (N Peoria Ave) OK, US: 36.206699, -95.976402

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 30, 2020, 3 p.m. 12.0 ppb (11) 1.4 ppb (1) 12.2 ppb (11) 11.0 ppb (10) 9.3 ppb (9) 1.0 ppb (1) 33.0 ppb (25) 0.21 ppb (2) N/A 13.3 μg/m3 (53) 53.0
 
March 30, 2020, 2 p.m. 26.3 ppb (24) 7.5 ppb (7) 26.4 ppb (24) 19.0 ppb (18) 17.6 ppb (16) 0.0 ppb (0) 14.0 ppb (11) 0.4 ppb (4) N/A 26.6 μg/m3 (81) 81.0
 
March 30, 2020, 1 p.m. 19.8 ppb (18) 7.8 ppb (7) 21.9 ppb (20) 12.0 ppb (11) 13.6 ppb (13) 0.0 ppb (0) 5.0 ppb (4) 0.51 ppb (6) N/A 29.2 μg/m3 (87) 87.0
 
March 30, 2020, noon 19.1 ppb (18) 7.5 ppb (7) 20.8 ppb (19) 12.0 ppb (11) 13.3 ppb (12) 0.0 ppb (0) 1.0 ppb (1) 0.46 ppb (5) N/A 27.6 μg/m3 (83) 83.0
 
March 30, 2020, 11 a.m. 12.2 ppb (11) 2.6 ppb (2) 14.3 ppb (13) 10.0 ppb (9) 10.8 ppb (10) 0.0 ppb (0) 1.0 ppb (1) 0.37 ppb (4) N/A 25.1 μg/m3 (78) 78.0
 
March 30, 2020, 10 a.m. 12.0 ppb (11) 1.3 ppb (1) 12.1 ppb (11) 11.0 ppb (10) 10.8 ppb (10) 0.0 ppb (0) 2.0 ppb (2) 0.34 ppb (4) N/A 23.7 μg/m3 (75) 75.0
 
March 30, 2020, 9 a.m. 14.9 ppb (14) 5.5 ppb (5) 16.2 ppb (15) 9.0 ppb (8) 10.0 ppb (9) 0.0 ppb (0) 0.0 ppb (0) 0.38 ppb (4) N/A 21.5 μg/m3 (70) 70.0
 
March 30, 2020, 8 a.m. 9.4 ppb (9) 1.4 ppb (1) 10.2 ppb (9) 8.0 ppb (7) 8.5 ppb (8) 0.0 ppb (0) 3.0 ppb (2) 0.32 ppb (4) N/A 18.6 μg/m3 (64) 64.0
 
March 30, 2020, 7 a.m. 13.8 ppb (13) 2.4 ppb (2) 14.3 ppb (13) 11.0 ppb (10) 12.1 ppb (11) 0.0 ppb (0) 1.0 ppb (1) 0.44 ppb (5) N/A 21.8 μg/m3 (71) 71.0
 
March 30, 2020, 6 a.m. 11.7 ppb (11) 1.0 ppb (1) 15.3 ppb (14) 11.0 ppb (10) 12.3 ppb (11) 0.0 ppb (0) 3.0 ppb (2) 0.42 ppb (5) N/A 23.4 μg/m3 (74) 74.0
 
March 30, 2020, 5 a.m. 12.1 ppb (11) 0.5 ppb (0) 12.3 ppb (11) 12.0 ppb (11) 11.9 ppb (11) 0.0 ppb (0) 5.0 ppb (4) 0.41 ppb (5) N/A 22.2 μg/m3 (72) 72.0
 
March 30, 2020, 4 a.m. 13.9 ppb (13) 0.7 ppb (1) 15.0 ppb (14) 13.0 ppb (12) 13.5 ppb (12) 0.0 ppb (0) 6.0 ppb (5) 0.43 ppb (5) N/A 21.9 μg/m3 (71) 71.0
 
March 30, 2020, 3 a.m. 29.9 ppb (28) 6.5 ppb (6) 34.2 ppb (32) 23.0 ppb (21) 24.4 ppb (23) 0.0 ppb (0) 3.0 ppb (2) 0.56 ppb (6) N/A 16.2 μg/m3 (59) 59.0
 
March 30, 2020, 2 a.m. 36.6 ppb (34) 6.6 ppb (6) 42.9 ppb (40) 30.0 ppb (28) 31.8 ppb (29) 0.0 ppb (0) 3.0 ppb (2) 0.69 ppb (8) N/A 15.8 μg/m3 (58) 58.0
 
March 30, 2020, 1 a.m. 19.3 ppb (18) 0.7 ppb (1) 23.3 ppb (22) 19.0 ppb (18) 22.1 ppb (20) 0.0 ppb (0) 23.0 ppb (18) 0.45 ppb (5) N/A 13.4 μg/m3 (53) 53.0
 
March 30, 2020, midnight 5.4 ppb (5) -0.1 ppb (0) 16.0 ppb (15) 6.0 ppb (6) 14.9 ppb (14) 0.0 ppb (0) 46.0 ppb (35) 0.2 ppb (2) N/A 8.4 μg/m3 (35) 35.0
 
March 29, 2020, 11 p.m. 1.3 ppb (1) -0.3 ppb (0) 2.0 ppb (2) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 7.7 μg/m3 (32) 41.0
 
March 29, 2020, 10 p.m. 1.1 ppb (1) -0.2 ppb (0) 1.7 ppb (2) 1.0 ppb (1) 1.5 ppb (1) 0.0 ppb (0) 54.0 ppb (42) 0.16 ppb (2) N/A 8.4 μg/m3 (35) 42.0
 
March 29, 2020, 9 p.m. 1.0 ppb (1) -0.2 ppb (0) 1.4 ppb (1) 1.0 ppb (1) 1.2 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.15 ppb (2) N/A 5.4 μg/m3 (23) 38.0
 
March 29, 2020, 8 p.m. 0.8 ppb (1) -0.2 ppb (0) 1.2 ppb (1) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A 4.2 μg/m3 (18) 37.0
 
March 29, 2020, 7 p.m. 0.7 ppb (1) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A 5.1 μg/m3 (21) 37.0
 
March 29, 2020, 6 p.m. 0.5 ppb (0) -0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.14 ppb (2) N/A 3.7 μg/m3 (15) 35.0
 
March 29, 2020, 5 p.m. 0.6 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) N/A 3.5 μg/m3 (15) 34.0
 
March 29, 2020, 4 p.m. 0.9 ppb (1) -0.1 ppb (0) 1.2 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) N/A 3.7 μg/m3 (15) 31.0
 
March 29, 2020, 3 p.m. 0.7 ppb (1) -0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 29.0
 
March 29, 2020, 2 p.m. 1.1 ppb (1) 0.0 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) N/A 4.5 μg/m3 (19) 28.0
 
March 29, 2020, 1 p.m. 2.5 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 29.0 ppb (22) 0.13 ppb (1) N/A 3.7 μg/m3 (15) 22.0
 
March 29, 2020, noon 3.5 ppb (3) 0.0 ppb (0) 3.5 ppb (3) 4.0 ppb (4) 3.2 ppb (3) 0.0 ppb (0) 20.0 ppb (15) 0.14 ppb (2) N/A 3.5 μg/m3 (15) 15.0
 
March 29, 2020, 11 a.m. 1.2 ppb (1) -0.2 ppb (0) 1.1 ppb (1) 2.0 ppb (2) 1.1 ppb (1) 0.0 ppb (0) 29.0 ppb (22) 0.12 ppb (1) N/A 2.9 μg/m3 (12) 22.0
 
March 29, 2020, 10 a.m. 2.3 ppb (2) -0.2 ppb (0) 2.6 ppb (2) 3.0 ppb (3) 2.6 ppb (2) 0.0 ppb (0) 22.0 ppb (17) 0.12 ppb (1) N/A 2.6 μg/m3 (11) 17.0
 
March 29, 2020, 9 a.m. 0.9 ppb (1) -0.2 ppb (0) 1.1 ppb (1) 1.0 ppb (1) 1.1 ppb (1) 0.0 ppb (0) 26.0 ppb (20) 0.12 ppb (1) N/A 2.3 μg/m3 (10) 20.0
 
March 29, 2020, 8 a.m. 0.8 ppb (1) -0.2 ppb (0) 0.6 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 32.0 ppb (25) 0.12 ppb (1) N/A 2.2 μg/m3 (9) 25.0
 
March 29, 2020, 7 a.m. 0.8 ppb (1) -0.2 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 34.0 ppb (26) 0.12 ppb (1) N/A 1.4 μg/m3 (6) 26.0
 
March 29, 2020, 6 a.m. 0.6 ppb (1) -0.2 ppb (0) 0.6 ppb (1) 1.0 ppb (1) 0.5 ppb (0) 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) N/A 0.9 μg/m3 (4) 28.0
 
March 29, 2020, 5 a.m. 0.5 ppb (0) -0.2 ppb (0) 0.5 ppb (0) 1.0 ppb (1) 0.5 ppb (0) 0.0 ppb (0) 35.0 ppb (27) 0.11 ppb (1) N/A 0.7 μg/m3 (3) 27.0
 
March 29, 2020, 4 a.m. 0.6 ppb (1) -0.2 ppb (0) 0.6 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 35.0 ppb (27) 0.11 ppb (1) N/A 0.9 μg/m3 (4) 27.0
 
March 29, 2020, 3 a.m. 0.8 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 37.0 ppb (28) 0.12 ppb (1) N/A 1.4 μg/m3 (6) 28.0
 
March 29, 2020, 2 a.m. 1.1 ppb (1) -0.2 ppb (0) 1.3 ppb (1) 1.0 ppb (1) 1.2 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 3.3 μg/m3 (14) 29.0
 
March 29, 2020, 1 a.m. 1.3 ppb (1) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) 1.2 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.11 ppb (1) N/A 3.5 μg/m3 (15) 31.0
 
March 29, 2020, midnight 1.0 ppb (1) -0.3 ppb (0) 1.7 ppb (2) 1.0 ppb (1) 1.6 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 7.0 μg/m3 (29) 37.0
 
March 28, 2020, 11 p.m. 0.8 ppb (1) -0.2 ppb (0) 1.2 ppb (1) 1.0 ppb (1) 1.1 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 5.9 μg/m3 (25) 38.0
 
March 28, 2020, 10 p.m. 0.8 ppb (1) 0.0 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 38.0
 
March 28, 2020, 9 p.m. 0.5 ppb (0) -0.3 ppb (0) 0.9 ppb (1) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 37.0
 
March 28, 2020, 8 p.m. 0.7 ppb (1) -0.3 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.11 ppb (1) N/A 3.1 μg/m3 (13) 38.0
 
March 28, 2020, 7 p.m. 0.8 ppb (1) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 52.0 ppb (40) 0.12 ppb (1) N/A 3.8 μg/m3 (16) 40.0
 
March 28, 2020, 6 p.m. 0.6 ppb (1) -0.2 ppb (0) 0.8 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 53.0 ppb (41) 0.11 ppb (1) N/A 3.3 μg/m3 (14) 41.0
 
March 28, 2020, 5 p.m. 0.7 ppb (1) -0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 51.0 ppb (39) 0.11 ppb (1) N/A 3.6 μg/m3 (15) 39.0
 
March 28, 2020, 4 p.m. 0.8 ppb (1) -0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.13 ppb (1) N/A 3.8 μg/m3 (16) 38.0
 
March 28, 2020, 3 p.m. 1.2 ppb (1) -0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 45.0 ppb (35) 0.12 ppb (1) N/A 5.4 μg/m3 (23) 35.0
 
March 28, 2020, 2 p.m. 4.1 ppb (4) 0.1 ppb (0) 3.9 ppb (4) 4.0 ppb (4) 3.3 ppb (3) 0.0 ppb (0) 31.0 ppb (24) 0.13 ppb (1) N/A 8.7 μg/m3 (36) 36.0
 
March 28, 2020, 1 p.m. 2.8 ppb (3) -0.1 ppb (0) 2.4 ppb (2) 3.0 ppb (3) 2.1 ppb (2) 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
March 28, 2020, noon 4.3 ppb (4) 0.0 ppb (0) 4.6 ppb (4) 4.0 ppb (4) 4.5 ppb (4) 0.0 ppb (0) 23.0 ppb (18) 0.16 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 28, 2020, 11 a.m. 2.7 ppb (3) -0.2 ppb (0) 2.3 ppb (2) 3.0 ppb (3) 2.3 ppb (2) 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 11.4 μg/m3 (48) 48.0
 
March 28, 2020, 10 a.m. 2.9 ppb (3) -0.2 ppb (0) 3.2 ppb (3) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) N/A 13.8 μg/m3 (54) 54.0
 
March 28, 2020, 9 a.m. 2.5 ppb (2) -0.2 ppb (0) 2.4 ppb (2) 3.0 ppb (3) 2.4 ppb (2) 0.0 ppb (0) 28.0 ppb (22) 0.18 ppb (2) N/A 19.4 μg/m3 (66) 66.0
 
March 28, 2020, 8 a.m. 4.6 ppb (4) -0.1 ppb (0) 4.5 ppb (4) 5.0 ppb (5) 4.4 ppb (4) 0.0 ppb (0) 26.0 ppb (20) 0.2 ppb (2) N/A 23.4 μg/m3 (74) 74.0
 
March 28, 2020, 7 a.m. 6.2 ppb (6) -0.1 ppb (0) 6.2 ppb (6) 6.0 ppb (6) 6.2 ppb (6) 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 24.7 μg/m3 (77) 77.0
 
March 28, 2020, 6 a.m. 6.4 ppb (6) -0.1 ppb (0) 6.4 ppb (6) 7.0 ppb (6) 6.4 ppb (6) 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A 23.8 μg/m3 (75) 75.0
 
March 28, 2020, 5 a.m. 6.7 ppb (6) -0.1 ppb (0) 6.6 ppb (6) 7.0 ppb (6) 6.6 ppb (6) 0.0 ppb (0) 24.0 ppb (18) 0.18 ppb (2) N/A 23.2 μg/m3 (74) 74.0
 
March 28, 2020, 4 a.m. 5.3 ppb (5) -0.1 ppb (0) 5.5 ppb (5) 6.0 ppb (6) 5.4 ppb (5) 0.0 ppb (0) 24.0 ppb (18) 0.19 ppb (2) N/A 22.4 μg/m3 (72) 72.0
 
March 28, 2020, 3 a.m. 4.8 ppb (4) -0.1 ppb (0) 4.8 ppb (4) 5.0 ppb (5) 4.7 ppb (4) 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A 22.0 μg/m3 (71) 71.0
 
March 28, 2020, 2 a.m. 6.2 ppb (6) 0.0 ppb (0) 6.2 ppb (6) 6.0 ppb (6) 6.2 ppb (6) 0.0 ppb (0) 27.0 ppb (21) 0.18 ppb (2) N/A 21.2 μg/m3 (70) 70.0
 
March 28, 2020, 1 a.m. 3.2 ppb (3) -0.1 ppb (0) 3.1 ppb (3) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 27.0 ppb (21) 0.17 ppb (2) N/A 19.6 μg/m3 (66) 66.0
 
March 28, 2020, midnight 4.2 ppb (4) -0.1 ppb (0) 4.2 ppb (4) 4.0 ppb (4) 4.1 ppb (4) 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 19.5 μg/m3 (66) 66.0
 
March 27, 2020, 11 p.m. 3.8 ppb (4) 0.0 ppb (0) 3.8 ppb (4) 4.0 ppb (4) 3.5 ppb (3) 0.0 ppb (0) 26.0 ppb (20) 0.2 ppb (2) N/A 18.0 μg/m3 (63) 63.0
 
March 27, 2020, 10 p.m. 3.8 ppb (4) 0.0 ppb (0) 3.8 ppb (4) 4.0 ppb (4) 3.4 ppb (3) 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) N/A 16.9 μg/m3 (60) 60.0
 
March 27, 2020, 9 p.m. 4.2 ppb (4) 0.1 ppb (0) 4.1 ppb (4) 4.0 ppb (4) 3.5 ppb (3) 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
March 27, 2020, 8 p.m. 5.9 ppb (5) 0.5 ppb (0) 5.4 ppb (5) 5.0 ppb (5) 4.5 ppb (4) 0.0 ppb (0) 28.0 ppb (22) 0.21 ppb (2) N/A 16.1 μg/m3 (59) 59.0
 
March 27, 2020, 7 p.m. 3.2 ppb (3) 0.0 ppb (0) 3.5 ppb (3) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) 31.0 ppb (24) 0.18 ppb (2) N/A 14.8 μg/m3 (56) 56.0
 
March 27, 2020, 6 p.m. 3.2 ppb (3) 0.1 ppb (0) 3.2 ppb (3) 3.0 ppb (3) 2.6 ppb (2) 0.0 ppb (0) 31.0 ppb (24) 0.19 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
March 27, 2020, 5 p.m. 4.9 ppb (5) 0.5 ppb (0) 4.8 ppb (4) 4.0 ppb (4) 3.6 ppb (3) 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 17.1 μg/m3 (61) 61.0
 
March 27, 2020, 4 p.m. 7.8 ppb (7) 1.0 ppb (1) 7.3 ppb (7) 7.0 ppb (6) 5.6 ppb (5) 1.0 ppb (1) 23.0 ppb (18) 0.22 ppb (2) N/A 17.7 μg/m3 (62) 62.0
 
March 27, 2020, 3 p.m. 10.9 ppb (10) 1.8 ppb (2) 10.2 ppb (9) 9.0 ppb (8) 7.7 ppb (7) 1.0 ppb (1) 19.0 ppb (15) 0.2 ppb (2) N/A 18.4 μg/m3 (64) 64.0
 
March 27, 2020, 2 p.m. 11.0 ppb (10) 1.4 ppb (1) 10.7 ppb (10) 10.0 ppb (9) 8.6 ppb (8) 1.0 ppb (1) 18.0 ppb (14) 0.2 ppb (2) N/A 18.5 μg/m3 (64) 64.0
 
March 27, 2020, 1 p.m. 9.4 ppb (9) 0.7 ppb (1) 8.9 ppb (8) 9.0 ppb (8) 7.8 ppb (7) 0.0 ppb (0) 20.0 ppb (15) 0.2 ppb (2) N/A 19.1 μg/m3 (65) 65.0
 
March 27, 2020, noon 12.4 ppb (11) 0.4 ppb (0) 12.5 ppb (12) 12.0 ppb (11) 11.8 ppb (11) 0.0 ppb (0) 17.0 ppb (13) 0.2 ppb (2) N/A 19.8 μg/m3 (67) 67.0
 
March 27, 2020, 11 a.m. 5.5 ppb (5) -0.1 ppb (0) 5.5 ppb (5) 6.0 ppb (6) 5.4 ppb (5) 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A 20.6 μg/m3 (68) 68.0
 
March 27, 2020, 10 a.m. 11.4 ppb (11) 0.0 ppb (0) 11.0 ppb (10) 11.0 ppb (10) 11.0 ppb (10) 1.0 ppb (1) 22.0 ppb (17) 0.19 ppb (2) N/A 22.2 μg/m3 (72) 72.0
 
March 27, 2020, 9 a.m. 9.1 ppb (8) -0.1 ppb (0) 8.6 ppb (8) 9.0 ppb (8) 8.6 ppb (8) 1.0 ppb (1) 25.0 ppb (19) 0.18 ppb (2) N/A 22.1 μg/m3 (71) 71.0
 
March 27, 2020, 8 a.m. 9.9 ppb (9) -0.1 ppb (0) 9.9 ppb (9) 10.0 ppb (9) 9.9 ppb (9) 1.0 ppb (1) 24.0 ppb (18) 0.18 ppb (2) N/A 21.9 μg/m3 (71) 71.0
 
March 27, 2020, 7 a.m. 6.6 ppb (6) -0.2 ppb (0) 6.7 ppb (6) 7.0 ppb (6) 6.7 ppb (6) 0.0 ppb (0) 29.0 ppb (22) 0.18 ppb (2) N/A 21.3 μg/m3 (70) 70.0
 
March 27, 2020, 6 a.m. 3.9 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) 4.0 ppb (4) 0.0 ppb (0) 33.0 ppb (25) 0.19 ppb (2) N/A 21.7 μg/m3 (71) 71.0
 
March 27, 2020, 5 a.m. 3.9 ppb (4) -0.3 ppb (0) 4.2 ppb (4) 4.0 ppb (4) 4.2 ppb (4) 0.0 ppb (0) 34.0 ppb (26) 0.19 ppb (2) N/A 21.0 μg/m3 (69) 69.0
 
March 27, 2020, 4 a.m. 2.0 ppb (2) -0.2 ppb (0) 2.2 ppb (2) 2.0 ppb (2) 2.2 ppb (2) 1.0 ppb (1) 38.0 ppb (29) 0.19 ppb (2) N/A 20.5 μg/m3 (68) 68.0
 
March 27, 2020, 3 a.m. 1.4 ppb (1) -0.2 ppb (0) 1.6 ppb (1) 2.0 ppb (2) 1.6 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.2 ppb (2) N/A 19.3 μg/m3 (66) 66.0
 
March 27, 2020, 2 a.m. 3.1 ppb (3) -0.2 ppb (0) 3.4 ppb (3) 3.0 ppb (3) 3.3 ppb (3) 0.0 ppb (0) 48.0 ppb (37) 0.24 ppb (3) N/A 19.3 μg/m3 (66) 66.0
 
March 27, 2020, 1 a.m. 4.8 ppb (4) -0.2 ppb (0) 5.0 ppb (5) 5.0 ppb (5) 4.9 ppb (5) 0.0 ppb (0) 46.0 ppb (35) 0.26 ppb (3) N/A 13.3 μg/m3 (53) 53.0
 
March 27, 2020, midnight 8.5 ppb (8) -0.1 ppb (0) 8.9 ppb (8) 9.0 ppb (8) 8.7 ppb (8) 1.0 ppb (1) 43.0 ppb (33) 0.3 ppb (3) N/A 11.1 μg/m3 (46) 46.0
 
March 26, 2020, 11 p.m. 6.3 ppb (6) 0.0 ppb (0) 6.8 ppb (6) 6.0 ppb (6) 6.4 ppb (6) 1.0 ppb (1) 46.0 ppb (35) 0.24 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
March 26, 2020, 10 p.m. 4.0 ppb (4) 0.0 ppb (0) 4.7 ppb (4) 4.0 ppb (4) 4.1 ppb (4) 1.0 ppb (1) 49.0 ppb (38) 0.19 ppb (2) N/A 6.7 μg/m3 (28) 38.0
 
March 26, 2020, 9 p.m. 3.6 ppb (3) 0.0 ppb (0) 4.2 ppb (4) 4.0 ppb (4) 3.6 ppb (3) 1.0 ppb (1) 52.0 ppb (40) 0.15 ppb (2) N/A 5.5 μg/m3 (23) 40.0
 
March 26, 2020, 8 p.m. 3.7 ppb (3) 0.0 ppb (0) 4.3 ppb (4) 4.0 ppb (4) 3.7 ppb (3) 0.0 ppb (0) 55.0 ppb (42) 0.15 ppb (2) N/A 6.4 μg/m3 (27) 42.0
 
March 26, 2020, 7 p.m. 3.9 ppb (4) -0.1 ppb (0) 4.2 ppb (4) 4.0 ppb (4) 3.8 ppb (4) 1.0 ppb (1) 57.0 ppb (44) 0.16 ppb (2) N/A 7.5 μg/m3 (31) 44.0
 
March 26, 2020, 6 p.m. 7.0 ppb (6) 0.0 ppb (0) 7.5 ppb (7) 7.0 ppb (6) 6.5 ppb (6) 1.0 ppb (1) 57.0 ppb (44) 0.18 ppb (2) N/A 8.9 μg/m3 (37) 44.0
 
March 26, 2020, 5 p.m. 5.9 ppb (5) 0.1 ppb (0) 6.7 ppb (6) 6.0 ppb (6) 5.6 ppb (5) 1.0 ppb (1) 52.0 ppb (40) 0.2 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
March 26, 2020, 4 p.m. 3.3 ppb (3) 0.0 ppb (0) 3.3 ppb (3) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 45.0 ppb (35) 0.2 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 26, 2020, 3 p.m. 9.6 ppb (9) 1.3 ppb (1) 8.7 ppb (8) 8.0 ppb (7) 6.7 ppb (6) 1.0 ppb (1) 34.0 ppb (26) 0.21 ppb (2) N/A 12.7 μg/m3 (51) 51.0
 
March 26, 2020, 2 p.m. 14.3 ppb (13) 1.8 ppb (2) 14.0 ppb (13) 13.0 ppb (12) 11.0 ppb (10) 1.0 ppb (1) 27.0 ppb (21) 0.27 ppb (3) N/A 13.3 μg/m3 (53) 53.0
 
March 26, 2020, 1 p.m. 13.2 ppb (12) 1.0 ppb (1) 12.6 ppb (12) 12.0 ppb (11) 10.9 ppb (10) 0.0 ppb (0) 25.0 ppb (19) 0.21 ppb (2) N/A 12.6 μg/m3 (51) 51.0
 
March 26, 2020, noon 20.9 ppb (19) 2.1 ppb (2) 17.7 ppb (16) 19.0 ppb (18) 16.7 ppb (15) 0.0 ppb (0) 15.0 ppb (12) 0.3 ppb (3) N/A 12.4 μg/m3 (51) 51.0
 
March 26, 2020, 11 a.m. 21.4 ppb (20) 3.0 ppb (3) 13.7 ppb (13) 18.0 ppb (17) 13.5 ppb (12) 0.0 ppb (0) 17.0 ppb (13) 0.23 ppb (3) N/A 11.5 μg/m3 (48) 48.0
 
March 26, 2020, 10 a.m. 4.3 ppb (4) -0.1 ppb (0) 4.8 ppb (4) 5.0 ppb (5) 4.7 ppb (4) 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) N/A 10.1 μg/m3 (42) 42.0
 
March 26, 2020, 9 a.m. 2.8 ppb (3) -0.2 ppb (0) 2.8 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
March 26, 2020, 8 a.m. 3.6 ppb (3) -0.1 ppb (0) 3.5 ppb (3) 4.0 ppb (4) 3.4 ppb (3) 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
March 26, 2020, 7 a.m. 2.4 ppb (2) -0.2 ppb (0) 2.6 ppb (2) 3.0 ppb (3) 2.6 ppb (2) 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) N/A 7.0 μg/m3 (29) 35.0
 
March 26, 2020, 6 a.m. 2.8 ppb (3) -0.2 ppb (0) 2.9 ppb (3) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 47.0 ppb (36) 0.12 ppb (1) N/A 6.4 μg/m3 (27) 36.0
 
March 26, 2020, 5 a.m. 2.8 ppb (3) -0.2 ppb (0) 2.9 ppb (3) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 49.0 ppb (38) 0.13 ppb (1) N/A 6.3 μg/m3 (26) 38.0
 
March 26, 2020, 4 a.m. 4.0 ppb (4) -0.2 ppb (0) 4.1 ppb (4) 4.0 ppb (4) 4.0 ppb (4) 0.0 ppb (0) 50.0 ppb (38) 0.14 ppb (2) N/A 6.6 μg/m3 (28) 38.0
 
March 26, 2020, 3 a.m. 4.6 ppb (4) -0.2 ppb (0) 4.8 ppb (4) 5.0 ppb (5) 4.8 ppb (4) 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 6.4 μg/m3 (27) 38.0
 
March 26, 2020, 2 a.m. 7.8 ppb (7) -0.3 ppb (0) 7.9 ppb (7) 8.0 ppb (7) 7.9 ppb (7) 0.0 ppb (0) 48.0 ppb (37) 0.2 ppb (2) N/A 8.1 μg/m3 (34) 37.0
 
March 26, 2020, 1 a.m. 8.4 ppb (8) -0.2 ppb (0) 9.4 ppb (9) 9.0 ppb (8) 9.3 ppb (9) 0.0 ppb (0) 45.0 ppb (35) 0.22 ppb (2) N/A 6.1 μg/m3 (25) 35.0
 
March 26, 2020, midnight 3.6 ppb (3) -0.2 ppb (0) 4.0 ppb (4) 4.0 ppb (4) 3.9 ppb (4) 0.0 ppb (0) 52.0 ppb (40) 0.17 ppb (2) N/A 4.8 μg/m3 (20) 40.0
 
March 25, 2020, 11 p.m. 3.0 ppb (3) -0.1 ppb (0) 3.2 ppb (3) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 4.6 μg/m3 (19) 41.0
 
March 25, 2020, 10 p.m. 3.0 ppb (3) -0.1 ppb (0) 3.4 ppb (3) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 5.3 μg/m3 (22) 41.0
 
March 25, 2020, 9 p.m. 3.1 ppb (3) 0.0 ppb (0) 3.2 ppb (3) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 52.0 ppb (40) 0.17 ppb (2) N/A 5.2 μg/m3 (22) 40.0
 
March 25, 2020, 8 p.m. 3.0 ppb (3) -0.1 ppb (0) 3.2 ppb (3) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 50.0 ppb (38) 0.15 ppb (2) N/A 4.6 μg/m3 (19) 38.0
 
March 25, 2020, 7 p.m. 3.0 ppb (3) 0.0 ppb (0) 3.0 ppb (3) 3.0 ppb (3) 2.5 ppb (2) 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) N/A 4.1 μg/m3 (17) 38.0
 
March 25, 2020, 6 p.m. N/A N/A 2.9 ppb (3) N/A 2.4 ppb (2) 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) N/A 3.8 μg/m3 (16) 35.0
 
March 25, 2020, 5 p.m. N/A N/A 2.6 ppb (2) N/A 2.0 ppb (2) 0.0 ppb (0) 36.0 ppb (28) N/A N/A 3.9 μg/m3 (16) 28.0
 
March 25, 2020, 4 p.m. 3.1 ppb (3) 0.0 ppb (0) 2.8 ppb (3) 3.0 ppb (3) 2.0 ppb (2) 0.0 ppb (0) N/A 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 25, 2020, 3 p.m. 7.8 ppb (7) 1.1 ppb (1) 5.4 ppb (5) 7.0 ppb (6) 3.7 ppb (3) 0.0 ppb (0) N/A 0.17 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
March 25, 2020, 2 p.m. 11.8 ppb (11) 2.9 ppb (3) 10.4 ppb (10) 9.0 ppb (8) 6.8 ppb (6) 0.0 ppb (0) 23.0 ppb (18) 0.22 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
March 25, 2020, 1 p.m. 39.7 ppb (37) 26.5 ppb (25) 39.6 ppb (37) 13.0 ppb (12) 15.0 ppb (14) 0.0 ppb (0) 3.0 ppb (2) 0.52 ppb (6) N/A 9.8 μg/m3 (41) 41.0
 
March 25, 2020, noon 38.9 ppb (36) 30.0 ppb (28) 42.0 ppb (39) 9.0 ppb (8) 14.1 ppb (13) 0.0 ppb (0) 0.0 ppb (0) 0.59 ppb (7) N/A 9.1 μg/m3 (38) 39.0
 
March 25, 2020, 11 a.m. 23.6 ppb (22) 15.3 ppb (14) 26.1 ppb (24) 8.0 ppb (7) 11.4 ppb (11) 0.0 ppb (0) 0.0 ppb (0) 0.36 ppb (4) N/A 8.3 μg/m3 (35) 35.0
 
March 25, 2020, 10 a.m. 12.8 ppb (12) 4.9 ppb (5) 16.3 ppb (15) 8.0 ppb (7) 9.3 ppb (9) 0.0 ppb (0) 0.0 ppb (0) 0.24 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
March 25, 2020, 9 a.m. 9.3 ppb (9) 2.1 ppb (2) 10.5 ppb (10) 7.0 ppb (6) 8.3 ppb (8) 0.0 ppb (0) 0.0 ppb (0) 0.21 ppb (2) N/A 6.8 μg/m3 (28) 28.0
 
March 25, 2020, 8 a.m. 9.5 ppb (9) 2.7 ppb (3) 11.1 ppb (10) 7.0 ppb (6) 8.1 ppb (8) 0.0 ppb (0) 0.0 ppb (0) 0.24 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
March 25, 2020, 7 a.m. 9.7 ppb (9) 1.0 ppb (1) 10.5 ppb (10) 9.0 ppb (8) 9.1 ppb (8) 0.0 ppb (0) 1.0 ppb (1) 0.23 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
March 25, 2020, 6 a.m. 7.5 ppb (7) 0.0 ppb (0) 10.3 ppb (10) 7.0 ppb (6) 9.4 ppb (9) 0.0 ppb (0) 8.0 ppb (6) 0.23 ppb (3) N/A 6.7 μg/m3 (28) 28.0
 
March 25, 2020, 5 a.m. 6.0 ppb (6) -0.1 ppb (0) 7.3 ppb (7) 6.0 ppb (6) 7.1 ppb (7) 0.0 ppb (0) 14.0 ppb (11) 0.19 ppb (2) N/A 6.5 μg/m3 (27) 27.0
 
March 25, 2020, 4 a.m. 5.9 ppb (5) 0.0 ppb (0) 6.0 ppb (6) 6.0 ppb (6) 5.6 ppb (5) 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A 6.3 μg/m3 (26) 26.0
 
March 25, 2020, 3 a.m. 7.6 ppb (7) 0.6 ppb (1) 5.8 ppb (5) 7.0 ppb (6) 5.3 ppb (5) 0.0 ppb (0) 22.0 ppb (17) 0.18 ppb (2) N/A 5.3 μg/m3 (22) 22.0
 
March 25, 2020, 2 a.m. 16.4 ppb (15) 1.9 ppb (2) 18.3 ppb (17) 15.0 ppb (14) 15.0 ppb (14) 0.0 ppb (0) 15.0 ppb (12) 0.28 ppb (3) N/A 4.6 μg/m3 (19) 19.0
 
March 25, 2020, 1 a.m. 6.3 ppb (6) 0.2 ppb (0) 5.9 ppb (5) 6.0 ppb (6) 5.1 ppb (5) 0.0 ppb (0) 29.0 ppb (22) 0.21 ppb (2) N/A 3.6 μg/m3 (15) 22.0
 
March 25, 2020, midnight 6.3 ppb (6) 0.6 ppb (1) 5.6 ppb (5) 6.0 ppb (6) 4.1 ppb (4) 0.0 ppb (0) 34.0 ppb (26) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 26.0
 
March 24, 2020, 11 p.m. 4.0 ppb (4) 0.4 ppb (0) 3.3 ppb (3) 4.0 ppb (4) 2.2 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A 2.8 μg/m3 (12) 28.0
 
March 24, 2020, 10 p.m. 3.8 ppb (4) 0.4 ppb (0) 3.7 ppb (3) 3.0 ppb (3) 2.3 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.18 ppb (2) N/A 2.2 μg/m3 (9) 28.0
 
March 24, 2020, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) 1.7 ppb (2) 2.0 ppb (2) 1.1 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) N/A 1.4 μg/m3 (6) 32.0
 
March 24, 2020, 8 p.m. 1.4 ppb (1) 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) N/A 1.2 μg/m3 (5) 31.0
 
March 24, 2020, 7 p.m. 1.9 ppb (2) 0.0 ppb (0) 1.6 ppb (1) 2.0 ppb (2) 1.1 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A 1.3 μg/m3 (5) 30.0
 
March 24, 2020, 6 p.m. 2.3 ppb (2) 0.0 ppb (0) 2.2 ppb (2) 2.0 ppb (2) 1.5 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) N/A 1.3 μg/m3 (5) 28.0
 
March 24, 2020, 5 p.m. 2.3 ppb (2) 0.1 ppb (0) 1.9 ppb (2) 2.0 ppb (2) 1.2 ppb (1) 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) N/A 1.7 μg/m3 (7) 25.0
 
March 24, 2020, 4 p.m. 4.4 ppb (4) 0.9 ppb (1) 4.0 ppb (4) 4.0 ppb (4) 2.4 ppb (2) 0.0 ppb (0) 25.0 ppb (19) 0.17 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
March 24, 2020, 3 p.m. 5.8 ppb (5) 1.3 ppb (1) 5.4 ppb (5) 5.0 ppb (5) 3.1 ppb (3) 0.0 ppb (0) 20.0 ppb (15) 0.17 ppb (2) N/A 3.3 μg/m3 (14) 15.0
 
March 24, 2020, 2 p.m. 4.6 ppb (4) 0.8 ppb (1) 4.1 ppb (4) 4.0 ppb (4) 2.7 ppb (3) 0.0 ppb (0) 18.0 ppb (14) 0.17 ppb (2) N/A 1.6 μg/m3 (7) 14.0
 
March 24, 2020, 1 p.m. 20.5 ppb (19) 9.4 ppb (9) 10.4 ppb (10) 11.0 ppb (10) 5.0 ppb (5) 0.0 ppb (0) 16.0 ppb (12) 0.18 ppb (2) N/A 1.6 μg/m3 (7) 19.0
 
March 24, 2020, noon 6.7 ppb (6) 2.1 ppb (2) 6.3 ppb (6) 5.0 ppb (5) 4.1 ppb (4) 0.0 ppb (0) 17.0 ppb (13) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 13.0
 
March 24, 2020, 11 a.m. 2.6 ppb (2) 0.0 ppb (0) 2.3 ppb (2) 3.0 ppb (3) 2.0 ppb (2) 0.0 ppb (0) 17.0 ppb (13) 0.16 ppb (2) N/A 2.4 μg/m3 (10) 13.0
 
March 24, 2020, 10 a.m. 3.1 ppb (3) -0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 17.0 ppb (13) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2020, 9 a.m. 7.4 ppb (7) 0.0 ppb (0) 7.4 ppb (7) 7.0 ppb (6) 7.2 ppb (7) 0.0 ppb (0) 13.0 ppb (10) 0.15 ppb (2) N/A 7.5 μg/m3 (31) 31.0
 
March 24, 2020, 8 a.m. 4.8 ppb (4) -0.1 ppb (0) 5.2 ppb (5) 5.0 ppb (5) 5.0 ppb (5) 0.0 ppb (0) 15.0 ppb (12) 0.14 ppb (2) N/A 6.7 μg/m3 (28) 28.0
 
March 24, 2020, 7 a.m. 8.8 ppb (8) 0.1 ppb (0) 8.6 ppb (8) 9.0 ppb (8) 8.3 ppb (8) 0.0 ppb (0) 11.0 ppb (8) 0.15 ppb (2) N/A 6.6 μg/m3 (28) 28.0
 
March 24, 2020, 6 a.m. 5.1 ppb (5) 0.0 ppb (0) 5.5 ppb (5) 5.0 ppb (5) 5.2 ppb (5) 0.0 ppb (0) 13.0 ppb (10) 0.16 ppb (2) N/A 5.5 μg/m3 (23) 23.0
 
March 24, 2020, 5 a.m. 3.7 ppb (3) 0.1 ppb (0) 3.6 ppb (3) 4.0 ppb (4) 3.2 ppb (3) 0.0 ppb (0) 16.0 ppb (12) 0.16 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
March 24, 2020, 4 a.m. 3.2 ppb (3) 0.0 ppb (0) 3.1 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 17.0 ppb (13) 0.16 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
March 24, 2020, 3 a.m. 3.3 ppb (3) 0.0 ppb (0) 3.1 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 17.0 ppb (13) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2020, 2 a.m. 3.4 ppb (3) 0.0 ppb (0) 3.2 ppb (3) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) 18.0 ppb (14) 0.16 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
March 24, 2020, 1 a.m. 4.5 ppb (4) 0.1 ppb (0) 4.2 ppb (4) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 18.0 ppb (14) 0.17 ppb (2) N/A 4.9 μg/m3 (20) 20.0
 
March 24, 2020, midnight 4.5 ppb (4) 0.4 ppb (0) 4.1 ppb (4) 4.0 ppb (4) 3.4 ppb (3) 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
March 23, 2020, 11 p.m. 4.0 ppb (4) 0.2 ppb (0) 3.9 ppb (4) 4.0 ppb (4) 3.1 ppb (3) 0.0 ppb (0) 22.0 ppb (17) 0.17 ppb (2) N/A 3.8 μg/m3 (16) 17.0
 
March 23, 2020, 10 p.m. 3.8 ppb (4) 0.2 ppb (0) 3.6 ppb (3) 4.0 ppb (4) 2.8 ppb (3) 0.0 ppb (0) 25.0 ppb (19) 0.17 ppb (2) N/A 3.1 μg/m3 (13) 19.0
 
March 23, 2020, 9 p.m. 3.4 ppb (3) 0.3 ppb (0) 3.2 ppb (3) 3.0 ppb (3) 2.3 ppb (2) 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A 3.1 μg/m3 (13) 20.0
 
March 23, 2020, 8 p.m. 3.4 ppb (3) 0.3 ppb (0) 3.0 ppb (3) 3.0 ppb (3) 2.3 ppb (2) 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) N/A 4.2 μg/m3 (18) 21.0
 
March 23, 2020, 7 p.m. 4.6 ppb (4) 0.7 ppb (1) 4.3 ppb (4) 4.0 ppb (4) 2.8 ppb (3) 0.0 ppb (0) 24.0 ppb (18) 0.17 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
March 23, 2020, 6 p.m. 5.8 ppb (5) 1.1 ppb (1) 5.5 ppb (5) 5.0 ppb (5) 3.7 ppb (3) 0.0 ppb (0) 20.0 ppb (15) 0.17 ppb (2) N/A 5.3 μg/m3 (22) 22.0
 
March 23, 2020, 5 p.m. 6.0 ppb (6) 0.9 ppb (1) 5.8 ppb (5) 5.0 ppb (5) 4.2 ppb (4) 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A 6.3 μg/m3 (26) 26.0
 
March 23, 2020, 4 p.m. 15.4 ppb (14) 6.4 ppb (6) 15.2 ppb (14) 9.0 ppb (8) 8.2 ppb (8) 0.0 ppb (0) 9.0 ppb (7) 0.21 ppb (2) N/A 11.2 μg/m3 (47) 47.0