AQSQID: 530530024

Site Name: Tacoma-S 36th St

Location: Tacoma (I 5), WA

Reporting: True, Located: True

Current AQI: 58.0

Tacoma (I 5) WA, US: 47.22634, -122.46256

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 26, 2019, 2 p.m. 61.5 ppb (58) 29.9 ppb (28) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 58.0
 
March 26, 2019, 1 p.m. 44.6 ppb (41) 16.9 ppb (16) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 41.0
 
March 26, 2019, noon 48.2 ppb (45) 19.9 ppb (18) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 45.0
 
March 26, 2019, 11 a.m. 42.5 ppb (39) 16.4 ppb (15) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 39.0
 
March 26, 2019, 10 a.m. 15.2 ppb (14) 2.0 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 14.0
 
March 26, 2019, 9 a.m. 15.9 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 26, 2019, 8 a.m. 16.7 ppb (15) 6.3 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
March 26, 2019, 7 a.m. 26.4 ppb (24) 8.6 ppb (8) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 24.0
 
March 26, 2019, 6 a.m. 24.5 ppb (23) 7.2 ppb (7) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 23.0
 
March 26, 2019, 5 a.m. 30.1 ppb (28) 9.2 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 28.0
 
March 26, 2019, 4 a.m. 18.8 ppb (17) 7.3 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 17.0
 
March 26, 2019, 3 a.m. 19.5 ppb (18) 8.1 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 26, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 26, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 26, 2019, midnight 38.5 ppb (36) 18.2 ppb (17) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 36.0
 
March 25, 2019, 11 p.m. 33.8 ppb (31) 16.2 ppb (15) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 31.0
 
March 25, 2019, 10 p.m. 48.6 ppb (45) 29.2 ppb (27) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 45.0
 
March 25, 2019, 9 p.m. 61.0 ppb (57) 40.1 ppb (37) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 57.0
 
March 25, 2019, 8 p.m. 59.6 ppb (56) 32.9 ppb (30) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 56.0
 
March 25, 2019, 7 p.m. 44.7 ppb (41) 22.5 ppb (21) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 41.0
 
March 25, 2019, 6 p.m. 39.6 ppb (37) 20.0 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
March 25, 2019, 5 p.m. 45.1 ppb (42) 26.1 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 42.0
 
March 25, 2019, 4 p.m. 48.5 ppb (45) 28.2 ppb (26) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 45.0
 
March 25, 2019, 3 p.m. 57.4 ppb (54) 33.5 ppb (31) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 54.0
 
March 25, 2019, 2 p.m. 47.8 ppb (44) 23.5 ppb (22) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 44.0
 
March 25, 2019, 1 p.m. 40.5 ppb (38) 18.8 ppb (17) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 38.0
 
March 25, 2019, noon 51.9 ppb (48) 28.5 ppb (26) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
March 25, 2019, 11 a.m. 32.4 ppb (30) 9.4 ppb (9) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 10 a.m. 34.0 ppb (31) 9.7 ppb (9) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 31.0
 
March 25, 2019, 9 a.m. 32.4 ppb (30) 9.3 ppb (9) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 30.0
 
March 25, 2019, 8 a.m. 18.6 ppb (17) 2.8 ppb (3) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 7 a.m. 18.5 ppb (17) 1.6 ppb (1) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
March 25, 2019, 6 a.m. 8.0 ppb (7) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2019, 5 a.m. 9.9 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 25, 2019, 4 a.m. 9.6 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 25, 2019, 3 a.m. 6.3 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 2 a.m. 4.6 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2019, 1 a.m. 3.5 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 25, 2019, midnight 13.1 ppb (12) 3.1 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2019, 11 p.m. 9.1 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 24, 2019, 10 p.m. 11.4 ppb (11) 3.9 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 24, 2019, 9 p.m. 8.6 ppb (8) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 8.0
 
March 24, 2019, 8 p.m. 9.6 ppb (9) 3.6 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 7 p.m. 18.4 ppb (17) 8.6 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2019, 6 p.m. 27.7 ppb (26) 14.7 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 26.0
 
March 24, 2019, 5 p.m. 28.4 ppb (26) 17.0 ppb (16) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 24, 2019, 4 p.m. 25.8 ppb (24) 14.8 ppb (14) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2019, 3 p.m. 21.5 ppb (20) 11.8 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 2 p.m. 18.9 ppb (18) 8.2 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 1 p.m. 13.7 ppb (13) 6.2 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2019, noon 14.6 ppb (14) 6.9 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 11 a.m. 13.6 ppb (13) 4.8 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 10 a.m. 13.7 ppb (13) 4.3 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 9 a.m. 12.6 ppb (12) 1.3 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2019, 8 a.m. 13.8 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 7 a.m. 22.8 ppb (21) 6.6 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 24, 2019, 6 a.m. 23.3 ppb (22) 8.3 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 22.0
 
March 24, 2019, 5 a.m. 24.7 ppb (23) 8.5 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 23.0
 
March 24, 2019, 4 a.m. 25.4 ppb (24) 9.6 ppb (9) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 24.0
 
March 24, 2019, 3 a.m. 26.9 ppb (25) 10.4 ppb (10) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 2 a.m. 33.4 ppb (31) 13.8 ppb (13) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 31.0
 
March 24, 2019, 1 a.m. 32.1 ppb (30) 14.3 ppb (13) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 30.0
 
March 24, 2019, midnight 31.9 ppb (30) 16.7 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 30.0
 
March 23, 2019, 11 p.m. 24.6 ppb (23) 13.5 ppb (12) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 23.0
 
March 23, 2019, 10 p.m. 23.7 ppb (22) 13.1 ppb (12) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 22.0
 
March 23, 2019, 9 p.m. 25.7 ppb (24) 11.8 ppb (11) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 8 p.m. 31.5 ppb (29) 14.5 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 29.0
 
March 23, 2019, 7 p.m. 30.8 ppb (29) 13.5 ppb (12) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 29.0
 
March 23, 2019, 6 p.m. 20.4 ppb (19) 8.1 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 5 p.m. 23.6 ppb (22) 8.1 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 4 p.m. 67.8 ppb (65) 40.9 ppb (38) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 65.0
 
March 23, 2019, 3 p.m. 48.2 ppb (45) 26.0 ppb (24) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 45.0
 
March 23, 2019, 2 p.m. 23.0 ppb (21) 4.6 ppb (4) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 21.0
 
March 23, 2019, 1 p.m. 11.0 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2019, noon 35.3 ppb (33) 10.7 ppb (10) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
March 23, 2019, 11 a.m. 32.4 ppb (30) 6.7 ppb (6) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 30.0
 
March 23, 2019, 10 a.m. 15.5 ppb (14) 0.5 ppb (0) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 14.0
 
March 23, 2019, 9 a.m. 17.1 ppb (16) 2.8 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 8 a.m. 11.8 ppb (11) 1.6 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 7 a.m. 15.5 ppb (14) 3.9 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 6 a.m. 19.9 ppb (18) 6.3 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 18.0
 
March 23, 2019, 5 a.m. 24.2 ppb (22) 10.0 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 4 a.m. 23.7 ppb (22) 9.3 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 22.0
 
March 23, 2019, 3 a.m. 24.3 ppb (23) 10.9 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 23.0
 
March 23, 2019, 2 a.m. 21.7 ppb (20) 9.7 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 20.0
 
March 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
March 23, 2019, midnight 24.8 ppb (23) 9.8 ppb (9) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 23.0
 
March 22, 2019, 11 p.m. 26.2 ppb (24) 11.4 ppb (11) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 24.0
 
March 22, 2019, 10 p.m. 17.4 ppb (16) 7.9 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 9 p.m. 30.2 ppb (28) 16.4 ppb (15) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
March 22, 2019, 8 p.m. 40.0 ppb (37) 22.5 ppb (21) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 37.0
 
March 22, 2019, 7 p.m. 31.0 ppb (29) 14.7 ppb (14) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 6 p.m. 49.1 ppb (45) 24.8 ppb (23) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
March 22, 2019, 5 p.m. 71.9 ppb (69) 42.6 ppb (39) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 69.0
 
March 22, 2019, 4 p.m. 76.8 ppb (74) 48.1 ppb (45) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 74.0
 
March 22, 2019, 3 p.m. 122.0 ppb (104) 89.7 ppb (88) N/A 32.0 ppb (30) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 104.0
 
March 22, 2019, 2 p.m. 67.7 ppb (65) 37.0 ppb (34) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 65.0
 
March 22, 2019, 1 p.m. 57.1 ppb (53) 28.3 ppb (26) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 53.0
 
March 22, 2019, noon 64.4 ppb (61) 32.9 ppb (30) N/A 32.0 ppb (30) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 61.0
 
March 22, 2019, 11 a.m. 50.3 ppb (47) 21.7 ppb (20) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 47.0
 
March 22, 2019, 10 a.m. 5.3 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 9 a.m. 5.4 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 22, 2019, 8 a.m. 11.3 ppb (10) 0.3 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
March 22, 2019, 7 a.m. 27.1 ppb (25) 8.5 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 25.0
 
March 22, 2019, 6 a.m. 28.2 ppb (26) 9.1 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 26.0
 
March 22, 2019, 5 a.m. 29.6 ppb (27) 10.9 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 27.0
 
March 22, 2019, 4 a.m. 31.0 ppb (29) 10.9 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 29.0
 
March 22, 2019, 3 a.m. 26.8 ppb (25) 11.0 ppb (10) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 25.0
 
March 22, 2019, 2 a.m. 27.7 ppb (26) 13.2 ppb (12) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 26.0
 
March 22, 2019, 1 a.m. 22.9 ppb (21) 11.1 ppb (10) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 22, 2019, midnight 22.8 ppb (21) 13.3 ppb (12) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 11 p.m. 27.0 ppb (25) 14.2 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 25.0
 
March 21, 2019, 10 p.m. 30.7 ppb (28) 17.0 ppb (16) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
March 21, 2019, 9 p.m. 39.3 ppb (36) 24.1 ppb (22) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 8 p.m. 34.3 ppb (32) 19.6 ppb (18) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 7 p.m. 39.2 ppb (36) 23.0 ppb (21) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 36.0
 
March 21, 2019, 6 p.m. 36.2 ppb (34) 19.5 ppb (18) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 34.0
 
March 21, 2019, 5 p.m. 40.5 ppb (38) 22.7 ppb (21) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 38.0
 
March 21, 2019, 4 p.m. 36.2 ppb (34) 20.0 ppb (19) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 34.0
 
March 21, 2019, 3 p.m. 45.8 ppb (42) 24.7 ppb (23) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 42.0
 
March 21, 2019, 2 p.m. 48.0 ppb (44) 24.8 ppb (23) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 44.0
 
March 21, 2019, 1 p.m. 53.5 ppb (50) 27.2 ppb (25) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 50.0
 
March 21, 2019, noon 53.3 ppb (49) 24.5 ppb (23) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
March 21, 2019, 11 a.m. 58.1 ppb (54) 27.0 ppb (25) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 54.0
 
March 21, 2019, 10 a.m. 34.6 ppb (32) 9.4 ppb (9) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 32.0
 
March 21, 2019, 9 a.m. 30.8 ppb (29) 7.5 ppb (7) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 8 a.m. 37.6 ppb (35) 6.5 ppb (6) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
March 21, 2019, 7 a.m. 21.8 ppb (20) 0.6 ppb (1) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 20.0
 
March 21, 2019, 6 a.m. 28.5 ppb (26) 6.9 ppb (6) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 26.0
 
March 21, 2019, 5 a.m. 26.5 ppb (25) 7.0 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 25.0
 
March 21, 2019, 4 a.m. 40.3 ppb (37) 12.9 ppb (12) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 37.0
 
March 21, 2019, 3 a.m. 47.3 ppb (44) 13.8 ppb (13) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 44.0
 
March 21, 2019, 2 a.m. 11.4 ppb (11) 0.9 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 21, 2019, 1 a.m. 34.0 ppb (31) 4.9 ppb (5) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 31.0
 
March 21, 2019, midnight 34.7 ppb (32) 10.2 ppb (9) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 32.0
 
March 20, 2019, 11 p.m. 43.1 ppb (40) 18.3 ppb (17) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 40.0
 
March 20, 2019, 10 p.m. 48.6 ppb (45) 22.6 ppb (21) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 45.0
 
March 20, 2019, 9 p.m. 50.5 ppb (47) 23.6 ppb (22) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 47.0
 
March 20, 2019, 8 p.m. 42.1 ppb (39) 19.8 ppb (18) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 39.0
 
March 20, 2019, 7 p.m. 48.1 ppb (45) 21.1 ppb (20) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 6 p.m. 57.6 ppb (54) 25.5 ppb (24) N/A 32.0 ppb (30) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 54.0
 
March 20, 2019, 5 p.m. 80.4 ppb (78) 42.9 ppb (40) N/A 38.0 ppb (35) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 78.0
 
March 20, 2019, 4 p.m. 146.9 ppb (109) 106.6 ppb (101) N/A 40.0 ppb (37) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 109.0
 
March 20, 2019, 3 p.m. 197.4 ppb (119) 155.1 ppb (110) N/A 42.0 ppb (39) N/A N/A N/A N/A N/A 23.0 μg/m3 (73) 119.0
 
March 20, 2019, 2 p.m. 167.8 ppb (113) 127.2 ppb (105) N/A 40.0 ppb (37) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 113.0
 
March 20, 2019, 1 p.m. 184.5 ppb (116) 143.6 ppb (108) N/A 41.0 ppb (38) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 116.0
 
March 20, 2019, noon 135.1 ppb (107) 91.8 ppb (90) N/A 43.0 ppb (40) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 107.0
 
March 20, 2019, 11 a.m. 101.7 ppb (100) 59.2 ppb (56) N/A 42.0 ppb (39) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 100.0
 
March 20, 2019, 10 a.m. 58.3 ppb (55) 19.7 ppb (18) N/A 39.0 ppb (36) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 55.0
 
March 20, 2019, 9 a.m. 52.6 ppb (49) 18.7 ppb (17) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 49.0
 
March 20, 2019, 8 a.m. 54.3 ppb (50) 16.7 ppb (15) N/A 38.0 ppb (35) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 50.0
 
March 20, 2019, 7 a.m. 39.3 ppb (36) 6.1 ppb (6) N/A 33.0 ppb (31) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 36.0
 
March 20, 2019, 6 a.m. 8.0 ppb (7) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
March 20, 2019, 5 a.m. 4.9 ppb (5) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 5.0
 
March 20, 2019, 4 a.m. 4.1 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
March 20, 2019, 3 a.m. 7.1 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
March 20, 2019, 2 a.m. 22.1 ppb (20) 2.5 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 20.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
March 20, 2019, midnight 22.2 ppb (21) 5.7 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 21.0
 
March 19, 2019, 11 p.m. 37.4 ppb (35) 14.3 ppb (13) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 35.0
 
March 19, 2019, 10 p.m. 28.8 ppb (27) 11.4 ppb (11) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 27.0
 
March 19, 2019, 9 p.m. 28.0 ppb (26) 11.0 ppb (10) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 26.0
 
March 19, 2019, 8 p.m. 32.0 ppb (30) 13.7 ppb (13) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 30.0
 
March 19, 2019, 7 p.m. 42.6 ppb (39) 21.6 ppb (20) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 39.0
 
March 19, 2019, 6 p.m. 65.4 ppb (62) 35.7 ppb (33) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 62.0
 
March 19, 2019, 5 p.m. 135.3 ppb (107) 89.2 ppb (87) N/A 46.0 ppb (43) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 107.0
 
March 19, 2019, 4 p.m. 199.8 ppb (119) 153.5 ppb (110) N/A 46.0 ppb (43) N/A N/A N/A N/A N/A 23.0 μg/m3 (73) 119.0
 
March 19, 2019, 3 p.m. 187.7 ppb (117) 147.8 ppb (109) N/A 40.0 ppb (37) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 117.0