AQSQID: 530530024

Site Name: Tacoma-S 36th St

Location: Tacoma (I 5), WA

Reporting: True, Located: True

Current AQI: 22.0

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
May 21, 2019, 9 a.m. 23.9 ppb (22) 4.8 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 22.0
 
May 21, 2019, 8 a.m. 27.6 ppb (26) 6.6 ppb (6) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 26.0
 
May 21, 2019, 7 a.m. 13.3 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 21, 2019, 6 a.m. 11.1 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 10.0
 
May 21, 2019, 5 a.m. 17.2 ppb (16) 0.9 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 16.0
 
May 21, 2019, 4 a.m. 12.9 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 12.0
 
May 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 21, 2019, 2 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
 
May 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 21, 2019, midnight 4.7 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2019, 11 p.m. 25.5 ppb (24) 9.1 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 24.0
 
May 20, 2019, 10 p.m. 36.9 ppb (34) 20.0 ppb (19) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 34.0
 
May 20, 2019, 9 p.m. 36.1 ppb (33) 18.8 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 33.0
 
May 20, 2019, 8 p.m. 34.0 ppb (31) 18.0 ppb (17) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 31.0
 
May 20, 2019, 7 p.m. 30.4 ppb (28) 15.7 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
May 20, 2019, 6 p.m. 34.3 ppb (32) 20.3 ppb (19) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 32.0
 
May 20, 2019, 5 p.m. 35.7 ppb (33) 18.7 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 33.0
 
May 20, 2019, 4 p.m. 38.7 ppb (36) 20.0 ppb (19) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 36.0
 
May 20, 2019, 3 p.m. 38.3 ppb (35) 19.2 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 35.0
 
May 20, 2019, 2 p.m. 37.6 ppb (35) 17.2 ppb (16) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 35.0
 
May 20, 2019, 1 p.m. 33.8 ppb (31) 13.6 ppb (13) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 31.0
 
May 20, 2019, noon 29.5 ppb (27) 11.3 ppb (10) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 27.0
 
May 20, 2019, 11 a.m. 19.2 ppb (18) 6.0 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 18.0
 
May 20, 2019, 10 a.m. 11.5 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2019, 9 a.m. 9.4 ppb (9) 3.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
May 20, 2019, 8 a.m. 10.8 ppb (10) 4.1 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
May 20, 2019, 7 a.m. 8.9 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
May 20, 2019, 6 a.m. 9.2 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 9.0
 
May 20, 2019, 5 a.m. 11.6 ppb (11) 5.1 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 11.0
 
May 20, 2019, 4 a.m. 14.2 ppb (13) 6.3 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 13.0
 
May 20, 2019, 3 a.m. 15.4 ppb (14) 8.0 ppb (7) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 20, 2019, 2 a.m. 17.2 ppb (16) 10.1 ppb (9) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2019, 1 a.m. 19.2 ppb (18) 10.1 ppb (9) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 18.0
 
May 20, 2019, midnight 19.9 ppb (18) 9.8 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 18.0
 
May 19, 2019, 11 p.m. 20.1 ppb (19) 9.5 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 19.0
 
May 19, 2019, 10 p.m. 26.1 ppb (24) 12.9 ppb (12) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 24.0
 
May 19, 2019, 9 p.m. 27.0 ppb (25) 13.1 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 25.0
 
May 19, 2019, 8 p.m. 20.5 ppb (19) 9.3 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 19.0
 
May 19, 2019, 7 p.m. 23.2 ppb (21) 10.7 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 6 p.m. 18.3 ppb (17) 8.0 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
 
May 19, 2019, 5 p.m. 19.4 ppb (18) 8.8 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
 
May 19, 2019, 4 p.m. 13.3 ppb (12) 3.9 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2019, 3 p.m. 20.4 ppb (19) 9.9 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 19.0
 
May 19, 2019, 2 p.m. 16.7 ppb (15) 7.3 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 15.0
 
May 19, 2019, 1 p.m. 10.8 ppb (10) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 10.0
 
May 19, 2019, noon 10.9 ppb (10) 3.9 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 10.0
 
May 19, 2019, 11 a.m. 6.8 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 6.0
 
May 19, 2019, 10 a.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
May 19, 2019, 9 a.m. 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
May 19, 2019, 8 a.m. 7.2 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
May 19, 2019, 7 a.m. 9.2 ppb (9) 3.8 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 9.0
 
May 19, 2019, 6 a.m. 9.7 ppb (9) 3.6 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
May 19, 2019, 5 a.m. 19.4 ppb (18) 6.9 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 4 a.m. 23.0 ppb (21) 4.5 ppb (4) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 3 a.m. 24.3 ppb (23) 5.8 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 23.0
 
May 19, 2019, 2 a.m. 29.9 ppb (28) 9.3 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 28.0
 
May 19, 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
May 19, 2019, midnight 22.1 ppb (20) 7.5 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 20.0
 
May 18, 2019, 11 p.m. 24.0 ppb (22) 10.6 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 22.0
 
May 18, 2019, 10 p.m. 21.6 ppb (20) 9.8 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 20.0
 
May 18, 2019, 9 p.m. 19.8 ppb (18) 8.7 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 18.0
 
May 18, 2019, 8 p.m. 20.9 ppb (19) 10.0 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 19.0
 
May 18, 2019, 7 p.m. 26.4 ppb (24) 13.1 ppb (12) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 24.0
 
May 18, 2019, 6 p.m. 22.5 ppb (21) 11.4 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 21.0
 
May 18, 2019, 5 p.m. 24.1 ppb (22) 12.3 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 22.0
 
May 18, 2019, 4 p.m. 23.4 ppb (22) 12.0 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 18, 2019, 3 p.m. 21.8 ppb (20) 9.3 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
May 18, 2019, 2 p.m. 31.2 ppb (29) 11.9 ppb (11) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
May 18, 2019, 1 p.m. 33.8 ppb (31) 12.3 ppb (11) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
May 18, 2019, noon 17.5 ppb (16) 1.4 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
May 18, 2019, 11 a.m. 10.2 ppb (9) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2019, 10 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 4.0 μg/m3 (17) 17.0
 
May 18, 2019, 9 a.m. 17.3 ppb (16) 4.9 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
May 18, 2019, 8 a.m. 12.0 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
May 18, 2019, 7 a.m. 18.9 ppb (18) 5.5 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 18.0
 
May 18, 2019, 6 a.m. 23.1 ppb (21) 8.4 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 21.0
 
May 18, 2019, 5 a.m. 25.9 ppb (24) 10.7 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 24.0
 
May 18, 2019, 4 a.m. 24.5 ppb (23) 10.9 ppb (10) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 23.0
 
May 18, 2019, 3 a.m. 28.2 ppb (26) 15.2 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 26.0
 
May 18, 2019, 2 a.m. 27.2 ppb (25) 14.6 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 25.0
 
May 18, 2019, 1 a.m. 27.3 ppb (25) 15.9 ppb (15) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 25.0
 
May 18, 2019, midnight 34.9 ppb (32) 19.1 ppb (18) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 32.0
 
May 17, 2019, 11 p.m. 29.2 ppb (27) 17.9 ppb (17) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 27.0
 
May 17, 2019, 10 p.m. 27.4 ppb (25) 14.9 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 17, 2019, 9 p.m. 23.8 ppb (22) 11.8 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 22.0
 
May 17, 2019, 8 p.m. 27.0 ppb (25) 15.8 ppb (15) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 25.0
 
May 17, 2019, 7 p.m. 26.5 ppb (25) 14.5 ppb (13) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 25.0
 
May 17, 2019, 6 p.m. 30.5 ppb (28) 17.2 ppb (16) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 28.0
 
May 17, 2019, 5 p.m. 34.1 ppb (32) 19.5 ppb (18) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 32.0
 
May 17, 2019, 4 p.m. 31.4 ppb (29) 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) 29.0
 
May 17, 2019, 3 p.m. 29.8 ppb (28) 16.1 ppb (15) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 28.0
 
May 17, 2019, 2 p.m. 27.7 ppb (26) 14.6 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 26.0
 
May 17, 2019, 1 p.m. 21.3 ppb (20) 11.8 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 20.0
 
May 17, 2019, noon 16.0 ppb (15) 8.2 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 15.0
 
May 17, 2019, 11 a.m. 13.1 ppb (12) 6.4 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 12.0
 
May 17, 2019, 10 a.m. 8.4 ppb (8) 4.3 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2019, 9 a.m. 6.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 17, 2019, 8 a.m. 7.1 ppb (7) 3.8 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 7.0
 
May 17, 2019, 7 a.m. 8.4 ppb (8) 4.4 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 8.0
 
May 17, 2019, 6 a.m. 12.1 ppb (11) 6.0 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 11.0
 
May 17, 2019, 5 a.m. 13.1 ppb (12) 6.4 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
May 17, 2019, 4 a.m. 12.3 ppb (11) 6.4 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2019, 3 a.m. 16.2 ppb (15) 8.8 ppb (8) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 15.0
 
May 17, 2019, 2 a.m. 18.6 ppb (17) 11.7 ppb (11) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 17.0
 
May 17, 2019, 1 a.m. 24.2 ppb (22) 14.8 ppb (14) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 22.0
 
May 17, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
May 16, 2019, 11 p.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
 
May 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
May 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
May 16, 2019, 8 p.m. 56.9 ppb (53) 30.2 ppb (28) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 21.0 μg/m3 (69) 69.0
 
May 16, 2019, 7 p.m. 58.7 ppb (55) 34.4 ppb (32) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 18.0 μg/m3 (63) 63.0
 
May 16, 2019, 6 p.m. 38.1 ppb (35) 19.1 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
May 16, 2019, 5 p.m. 25.1 ppb (23) 10.9 ppb (10) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
May 16, 2019, 4 p.m. 51.0 ppb (47) 28.6 ppb (26) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
May 16, 2019, 3 p.m. 52.4 ppb (49) 28.4 ppb (26) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
May 16, 2019, 2 p.m. 54.1 ppb (50) 30.6 ppb (28) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 50.0
 
May 16, 2019, 1 p.m. 45.4 ppb (42) 22.5 ppb (21) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
May 16, 2019, noon 51.1 ppb (47) 27.8 ppb (26) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
May 16, 2019, 11 a.m. 35.9 ppb (33) 16.6 ppb (15) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
May 16, 2019, 10 a.m. 35.8 ppb (33) 19.9 ppb (18) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 33.0
 
May 16, 2019, 9 a.m. 16.1 ppb (15) 2.7 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 16, 2019, 8 a.m. 20.8 ppb (19) 7.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
May 16, 2019, 7 a.m. 23.9 ppb (22) 7.5 ppb (7) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 22.0
 
May 16, 2019, 6 a.m. 29.6 ppb (27) 13.3 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 27.0
 
May 16, 2019, 5 a.m. 35.0 ppb (32) 14.0 ppb (13) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
May 16, 2019, 4 a.m. 24.1 ppb (22) 5.7 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
May 16, 2019, 3 a.m. 45.4 ppb (42) 21.7 ppb (20) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 42.0
 
May 16, 2019, 2 a.m. 41.6 ppb (39) 18.4 ppb (17) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 39.0
 
May 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 16, 2019, midnight 29.1 ppb (27) 9.4 ppb (9) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
May 15, 2019, 11 p.m. 24.1 ppb (22) 6.7 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 22.0
 
May 15, 2019, 10 p.m. 23.9 ppb (22) 9.1 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 22.0
 
May 15, 2019, 9 p.m. 23.8 ppb (22) 8.7 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 22.0
 
May 15, 2019, 8 p.m. 32.0 ppb (30) 15.1 ppb (14) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 30.0
 
May 15, 2019, 7 p.m. 35.0 ppb (32) 18.5 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 32.0
 
May 15, 2019, 6 p.m. 34.4 ppb (32) 17.5 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 32.0
 
May 15, 2019, 5 p.m. 45.3 ppb (42) 26.1 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 42.0
 
May 15, 2019, 4 p.m. 22.9 ppb (21) 11.6 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 21.0
 
May 15, 2019, 3 p.m. 36.0 ppb (33) 19.9 ppb (18) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 33.0
 
May 15, 2019, 2 p.m. 42.7 ppb (40) 23.1 ppb (21) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 40.0
 
May 15, 2019, 1 p.m. 45.7 ppb (42) 22.6 ppb (21) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 42.0
 
May 15, 2019, noon 30.5 ppb (28) 9.9 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 28.0
 
May 15, 2019, 11 a.m. 18.6 ppb (17) 6.2 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 17.0
 
May 15, 2019, 10 a.m. 4.1 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2019, 9 a.m. 12.5 ppb (12) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 12.0
 
May 15, 2019, 8 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
May 15, 2019, 7 a.m. 11.3 ppb (10) 2.4 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 10.0
 
May 15, 2019, 6 a.m. 16.1 ppb (15) 5.9 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 15.0
 
May 15, 2019, 5 a.m. 17.9 ppb (17) 7.7 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 17.0
 
May 15, 2019, 4 a.m. 20.9 ppb (19) 9.4 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 19.0
 
May 15, 2019, 3 a.m. 30.6 ppb (28) 15.8 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 28.0
 
May 15, 2019, 2 a.m. 30.4 ppb (28) 14.9 ppb (14) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 28.0
 
May 15, 2019, 1 a.m. 29.3 ppb (27) 14.9 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 27.0
 
May 15, 2019, midnight 25.4 ppb (24) 14.0 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 24.0
 
May 14, 2019, 11 p.m. 29.7 ppb (28) 16.0 ppb (15) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 28.0
 
May 14, 2019, 10 p.m. 25.4 ppb (24) 14.1 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 24.0
 
May 14, 2019, 9 p.m. 27.4 ppb (25) 16.4 ppb (15) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 25.0
 
May 14, 2019, 8 p.m. 27.6 ppb (26) 15.1 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 26.0
 
May 14, 2019, 7 p.m. 33.5 ppb (31) 18.5 ppb (17) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 31.0
 
May 14, 2019, 6 p.m. 32.1 ppb (30) 17.4 ppb (16) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 30.0
 
May 14, 2019, 5 p.m. 16.2 ppb (15) 6.4 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 14, 2019, 4 p.m. 39.6 ppb (37) 19.1 ppb (18) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 37.0
 
May 14, 2019, 3 p.m. 36.9 ppb (34) 15.9 ppb (15) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 34.0
 
May 14, 2019, 2 p.m. 17.3 ppb (16) 6.1 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 14, 2019, 1 p.m. 23.9 ppb (22) 9.0 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
 
May 14, 2019, noon 28.0 ppb (26) 12.6 ppb (12) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
May 14, 2019, 11 a.m. 23.9 ppb (22) 11.4 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
May 14, 2019, 10 a.m. 22.0 ppb (20) 8.6 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0