ID: 168

AQSQID: 060590007

Site Name: Anaheim

Added: April 21, 2020, 6:24 p.m.

Updated: April 20, 2021, 9:44 a.m.

Location: Anaheim (Swest Anaheim), CA

Reporting: True, Located: True

Current AQI: 42.0

Anaheim (Swest Anaheim) CA, US: 33.830586, -117.938509

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 20, 2021, 8 a.m. 3.8 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) 0.16 ppb (3) 32.5 μg/m3 (31) 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 7 a.m. 5.4 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) 0.15 ppb (2) 31.7 μg/m3 (30) 9.8 μg/m3 (41) 41.0
 
April 20, 2021, 6 a.m. 5.7 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (29) 0.17 ppb (3) 29.3 μg/m3 (28) 11.7 μg/m3 (49) 49.0
 
April 20, 2021, 5 a.m. 5.8 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (31) 0.19 ppb (3) 24.6 μg/m3 (23) 11.9 μg/m3 (50) 50.0
 
April 20, 2021, 4 a.m. 6.8 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 32.0 ppb (30) 0.2 ppb (3) 28.3 μg/m3 (27) 9.8 μg/m3 (41) 41.0
 
April 20, 2021, 3 a.m. 7.8 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 36.0 ppb (34) 0.2 ppb (3) 25.9 μg/m3 (24) 8.5 μg/m3 (36) 36.0
 
April 20, 2021, 2 a.m. 8.0 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 40.0 ppb (38) 0.21 ppb (3) 18.8 μg/m3 (18) 6.3 μg/m3 (27) 38.0
 
April 20, 2021, 1 a.m. 8.6 ppb (9) 0.4 ppb (1) N/A 8.0 ppb (8) N/A N/A 45.0 ppb (42) 0.21 ppb (3) 23.1 μg/m3 (22) 5.6 μg/m3 (24) 42.0
 
April 20, 2021, midnight 8.5 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (8) N/A N/A 48.0 ppb (45) 0.21 ppb (3) 20.7 μg/m3 (20) 4.6 μg/m3 (20) 45.0
 
April 19, 2021, 11 p.m. 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (48) 0.18 ppb (3) 19.9 μg/m3 (19) 6.8 μg/m3 (29) 48.0
 
April 19, 2021, 10 p.m. 4.1 ppb (4) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (51) 0.18 ppb (3) 22.4 μg/m3 (21) 7.8 μg/m3 (33) 51.0
 
April 19, 2021, 9 p.m. 4.0 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.19 ppb (3) 27.3 μg/m3 (26) 8.3 μg/m3 (35) 61.0
 
April 19, 2021, 8 p.m. 6.4 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (55) 0.21 ppb (3) 35.1 μg/m3 (33) 8.8 μg/m3 (37) 55.0
 
April 19, 2021, 7 p.m. 7.8 ppb (8) 1.2 ppb (2) N/A 7.0 ppb (7) N/A N/A 53.0 ppb (50) 0.23 ppb (3) 32.1 μg/m3 (30) 9.6 μg/m3 (40) 50.0
 
April 19, 2021, 6 p.m. 8.4 ppb (8) 1.3 ppb (2) N/A 7.0 ppb (7) N/A N/A 50.0 ppb (47) 0.26 ppb (4) 32.1 μg/m3 (30) 9.5 μg/m3 (40) 47.0
 
April 19, 2021, 5 p.m. 16.9 ppb (16) 3.5 ppb (4) N/A 13.0 ppb (13) N/A N/A 41.0 ppb (38) 0.39 ppb (5) 41.1 μg/m3 (39) 8.8 μg/m3 (37) 39.0
 
April 19, 2021, 4 p.m. 23.1 ppb (22) 5.8 ppb (6) N/A 17.0 ppb (17) N/A N/A 32.0 ppb (30) 0.43 ppb (5) 44.5 μg/m3 (42) 9.8 μg/m3 (41) 42.0
 
April 19, 2021, 3 p.m. 51.7 ppb (49) 20.2 ppb (20) N/A 31.0 ppb (30) N/A N/A 14.0 ppb (13) 0.62 ppb (7) 57.9 μg/m3 (53) 18.5 μg/m3 (65) 65.0
 
April 19, 2021, 2 p.m. 68.9 ppb (67) 33.7 ppb (32) N/A 35.0 ppb (34) N/A N/A 4.0 ppb (4) 0.75 ppb (10) 54.0 μg/m3 (50) 11.6 μg/m3 (49) 67.0
 
April 19, 2021, 1 p.m. 65.1 ppb (63) 29.0 ppb (28) N/A 36.0 ppb (34) N/A N/A 0.0 ppb (0) 0.78 ppb (10) 40.4 μg/m3 (38) 8.8 μg/m3 (37) 63.0
 
April 19, 2021, noon 53.8 ppb (51) 20.4 ppb (20) N/A 33.0 ppb (32) N/A N/A 0.0 ppb (0) 0.61 ppb (7) 33.2 μg/m3 (31) 6.5 μg/m3 (28) 51.0
 
April 19, 2021, 11 a.m. 29.3 ppb (28) 3.0 ppb (3) N/A 26.0 ppb (25) N/A N/A 2.0 ppb (2) 0.49 ppb (6) 22.5 μg/m3 (21) 6.1 μg/m3 (26) 28.0
 
April 19, 2021, 10 a.m. 32.4 ppb (31) 4.2 ppb (4) N/A 28.0 ppb (27) N/A N/A 0.0 ppb (0) 0.64 ppb (7) 26.1 μg/m3 (25) 9.8 μg/m3 (41) 41.0
 
April 19, 2021, 9 a.m. 33.7 ppb (32) 4.0 ppb (4) N/A 30.0 ppb (29) N/A N/A 1.0 ppb (1) 0.6 ppb (7) 29.5 μg/m3 (28) 12.4 μg/m3 (52) 52.0
 
April 19, 2021, 8 a.m. 39.9 ppb (38) 7.3 ppb (7) N/A 33.0 ppb (32) N/A N/A 0.0 ppb (0) 0.74 ppb (8) 26.1 μg/m3 (25) 12.2 μg/m3 (52) 52.0
 
April 19, 2021, 7 a.m. 25.1 ppb (24) 0.9 ppb (1) N/A 24.0 ppb (23) N/A N/A 11.0 ppb (11) 0.53 ppb (6) 25.9 μg/m3 (24) 10.8 μg/m3 (46) 46.0
 
April 19, 2021, 6 a.m. 24.8 ppb (24) 0.9 ppb (1) N/A 24.0 ppb (23) N/A N/A 13.0 ppb (13) 0.47 ppb (6) 20.0 μg/m3 (19) 6.3 μg/m3 (27) 27.0
 
April 19, 2021, 5 a.m. 15.4 ppb (15) 0.3 ppb (1) N/A 15.0 ppb (15) N/A N/A 29.0 ppb (27) 0.37 ppb (5) 17.3 μg/m3 (17) 2.6 μg/m3 (11) 27.0
 
April 19, 2021, 4 a.m. 10.4 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 40.0 ppb (38) 0.29 ppb (4) 13.1 μg/m3 (13) 4.1 μg/m3 (18) 38.0
 
April 19, 2021, 3 a.m. 6.1 ppb (6) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 47.0 ppb (44) 0.2 ppb (3) 13.8 μg/m3 (13) 3.9 μg/m3 (17) 44.0
 
April 19, 2021, 2 a.m. 5.3 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (47) 0.2 ppb (3) 33.4 μg/m3 (31) 0.5 μg/m3 (3) 47.0
 
April 19, 2021, 1 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.19 ppb (3) 23.6 μg/m3 (22) N/A 49.0
 
April 19, 2021, midnight 3.1 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (50) 0.17 ppb (3) 26.1 μg/m3 (25) -0.9 μg/m3 (0) 50.0
 
April 18, 2021, 11 p.m. 4.9 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 63.0 ppb (78) 0.2 ppb (3) 25.6 μg/m3 (24) 0.5 μg/m3 (3) 78.0
 
April 18, 2021, 10 p.m. 2.5 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 61.0 ppb (71) 0.17 ppb (3) 13.8 μg/m3 (13) N/A 71.0
 
April 18, 2021, 9 p.m. 2.1 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (68) 0.16 ppb (3) 15.3 μg/m3 (15) -0.4 μg/m3 (0) 68.0
 
April 18, 2021, 8 p.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (51) 0.16 ppb (3) 11.8 μg/m3 (11) 2.4 μg/m3 (10) 51.0
 
April 18, 2021, 7 p.m. 1.8 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) 0.15 ppb (2) 48.9 μg/m3 (46) 0.0 μg/m3 (0) 48.0
 
April 18, 2021, 6 p.m. 1.8 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (45) 0.15 ppb (2) 29.9 μg/m3 (28) 0.3 μg/m3 (2) 45.0
 
April 18, 2021, 5 p.m. 2.2 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.15 ppb (2) 65.6 μg/m3 (57) 4.4 μg/m3 (19) 57.0
 
April 18, 2021, 4 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.17 ppb (3) 75.9 μg/m3 (62) 5.4 μg/m3 (23) 62.0
 
April 18, 2021, 3 p.m. 28.5 ppb (27) 10.9 ppb (11) N/A 18.0 ppb (17) N/A N/A 15.0 ppb (14) 0.58 ppb (7) 38.9 μg/m3 (37) 26.9 μg/m3 (83) 83.0
 
April 18, 2021, 2 p.m. 37.3 ppb (36) 18.3 ppb (18) N/A 19.0 ppb (18) N/A N/A 4.0 ppb (4) 0.73 ppb (8) 45.8 μg/m3 (43) 20.5 μg/m3 (69) 69.0
 
April 18, 2021, 1 p.m. 36.7 ppb (35) 18.1 ppb (18) N/A 19.0 ppb (18) N/A N/A 0.0 ppb (0) 0.75 ppb (10) 29.3 μg/m3 (28) 11.4 μg/m3 (48) 48.0
 
April 18, 2021, noon 27.4 ppb (26) 7.4 ppb (7) N/A 20.0 ppb (19) N/A N/A 0.0 ppb (0) 0.59 ppb (7) 35.6 μg/m3 (33) 10.8 μg/m3 (46) 46.0
 
April 18, 2021, 11 a.m. 26.8 ppb (26) 5.7 ppb (6) N/A 21.0 ppb (20) N/A N/A 0.0 ppb (0) 0.53 ppb (6) 31.3 μg/m3 (29) 12.7 μg/m3 (53) 53.0
 
April 18, 2021, 10 a.m. 26.4 ppb (25) 4.2 ppb (4) N/A 22.0 ppb (21) N/A N/A 0.0 ppb (0) 0.59 ppb (7) 30.5 μg/m3 (29) 10.5 μg/m3 (44) 44.0
 
April 18, 2021, 9 a.m. 14.3 ppb (14) 0.5 ppb (1) N/A 14.0 ppb (14) N/A N/A 13.0 ppb (13) 0.33 ppb (4) 33.9 μg/m3 (32) 10.3 μg/m3 (43) 43.0
 
April 18, 2021, 8 a.m. 16.6 ppb (16) 0.6 ppb (1) N/A 16.0 ppb (16) N/A N/A 11.0 ppb (11) 0.36 ppb (5) 32.9 μg/m3 (31) 14.1 μg/m3 (56) 56.0
 
April 18, 2021, 7 a.m. 15.0 ppb (15) 0.4 ppb (1) N/A 15.0 ppb (15) N/A N/A 14.0 ppb (13) 0.34 ppb (4) 29.7 μg/m3 (28) 14.4 μg/m3 (56) 56.0
 
April 18, 2021, 6 a.m. 14.2 ppb (14) 0.3 ppb (1) N/A 14.0 ppb (14) N/A N/A 17.0 ppb (16) 0.3 ppb (4) 34.9 μg/m3 (33) 14.9 μg/m3 (57) 57.0
 
April 18, 2021, 5 a.m. 14.7 ppb (14) 0.2 ppb (1) N/A 14.0 ppb (14) N/A N/A 19.0 ppb (18) 0.28 ppb (4) 34.2 μg/m3 (32) 16.8 μg/m3 (61) 61.0
 
April 18, 2021, 4 a.m. 15.4 ppb (15) 0.2 ppb (1) N/A 15.0 ppb (15) N/A N/A 21.0 ppb (20) 0.27 ppb (4) 32.5 μg/m3 (31) 16.6 μg/m3 (61) 61.0
 
April 18, 2021, 3 a.m. 12.0 ppb (12) 0.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) 0.25 ppb (3) 31.4 μg/m3 (30) 11.0 μg/m3 (46) 46.0
 
April 18, 2021, 2 a.m. 7.4 ppb (7) -0.1 ppb (0) N/A 8.0 ppb (8) N/A N/A 40.0 ppb (38) 0.25 ppb (3) 32.2 μg/m3 (30) 10.3 μg/m3 (43) 43.0
 
April 18, 2021, 1 a.m. 7.1 ppb (7) 0.3 ppb (1) N/A 7.0 ppb (7) N/A N/A 44.0 ppb (41) 0.24 ppb (3) 27.8 μg/m3 (26) 17.5 μg/m3 (63) 63.0
 
April 18, 2021, midnight 6.7 ppb (7) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 47.0 ppb (44) 0.21 ppb (3) 31.2 μg/m3 (29) 8.0 μg/m3 (34) 44.0
 
April 17, 2021, 11 p.m. 4.2 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (48) 0.19 ppb (3) 32.6 μg/m3 (31) 7.3 μg/m3 (31) 48.0
 
April 17, 2021, 10 p.m. 4.4 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (48) 0.18 ppb (3) 37.2 μg/m3 (35) 14.6 μg/m3 (57) 57.0
 
April 17, 2021, 9 p.m. 5.0 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (50) 0.18 ppb (3) 30.5 μg/m3 (29) 13.4 μg/m3 (54) 54.0
 
April 17, 2021, 8 p.m. 4.4 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.19 ppb (3) 31.7 μg/m3 (30) 11.4 μg/m3 (48) 49.0
 
April 17, 2021, 7 p.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (50) 0.2 ppb (3) 33.1 μg/m3 (31) 10.1 μg/m3 (43) 50.0
 
April 17, 2021, 6 p.m. 4.3 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.22 ppb (3) 36.0 μg/m3 (34) 11.0 μg/m3 (46) 49.0
 
April 17, 2021, 5 p.m. 4.4 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.22 ppb (3) 33.6 μg/m3 (32) 12.4 μg/m3 (52) 52.0
 
April 17, 2021, 4 p.m. 4.7 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) 0.21 ppb (3) 38.7 μg/m3 (36) 11.7 μg/m3 (49) 49.0
 
April 17, 2021, 3 p.m. 4.7 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.2 ppb (3) 27.8 μg/m3 (26) 10.0 μg/m3 (42) 42.0
 
April 17, 2021, 2 p.m. 4.8 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.2 ppb (3) 25.6 μg/m3 (24) 11.2 μg/m3 (47) 47.0
 
April 17, 2021, 1 p.m. 1.7 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.15 ppb (2) 28.3 μg/m3 (27) 10.8 μg/m3 (46) 46.0
 
April 17, 2021, noon 1.4 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.15 ppb (2) 24.4 μg/m3 (23) 10.5 μg/m3 (44) 44.0
 
April 17, 2021, 11 a.m. 1.5 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.15 ppb (2) 25.9 μg/m3 (24) 10.0 μg/m3 (42) 42.0
 
April 17, 2021, 10 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.16 ppb (3) 26.6 μg/m3 (25) 9.3 μg/m3 (39) 39.0
 
April 17, 2021, 9 a.m. 4.4 ppb (5) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) 0.17 ppb (3) 26.9 μg/m3 (25) 9.8 μg/m3 (41) 41.0
 
April 17, 2021, 8 a.m. 6.7 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 28.0 ppb (26) 0.19 ppb (3) 30.5 μg/m3 (29) 9.5 μg/m3 (40) 40.0
 
April 17, 2021, 7 a.m. 9.1 ppb (9) 0.1 ppb (1) N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.22 ppb (3) 26.4 μg/m3 (25) 10.5 μg/m3 (44) 44.0
 
April 17, 2021, 6 a.m. 9.6 ppb (10) 0.1 ppb (1) N/A 10.0 ppb (10) N/A N/A 25.0 ppb (24) 0.24 ppb (3) 30.8 μg/m3 (29) 10.5 μg/m3 (44) 44.0
 
April 17, 2021, 5 a.m. 12.3 ppb (12) 0.1 ppb (1) N/A 12.0 ppb (12) N/A N/A 25.0 ppb (24) 0.27 ppb (4) 26.6 μg/m3 (25) 10.5 μg/m3 (44) 44.0
 
April 17, 2021, 4 a.m. 11.9 ppb (12) 0.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 26.0 ppb (25) 0.24 ppb (3) 24.4 μg/m3 (23) 11.7 μg/m3 (49) 49.0
 
April 17, 2021, 3 a.m. 8.7 ppb (9) -0.1 ppb (0) N/A 9.0 ppb (9) N/A N/A 33.0 ppb (31) 0.2 ppb (3) 19.8 μg/m3 (19) 10.3 μg/m3 (43) 43.0
 
April 17, 2021, 2 a.m. 5.3 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (38) 0.18 ppb (3) 19.3 μg/m3 (18) 8.8 μg/m3 (37) 38.0
 
April 17, 2021, 1 a.m. 5.2 ppb (5) 0.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.17 ppb (3) 26.8 μg/m3 (25) 9.5 μg/m3 (40) 40.0
 
April 17, 2021, midnight 5.2 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (41) 0.18 ppb (3) 25.9 μg/m3 (24) 10.1 μg/m3 (43) 43.0
 
April 16, 2021, 11 p.m. 5.2 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (43) 0.18 ppb (3) 28.5 μg/m3 (27) 11.9 μg/m3 (50) 50.0
 
April 16, 2021, 10 p.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (44) 0.18 ppb (3) 31.0 μg/m3 (29) 13.9 μg/m3 (55) 55.0
 
April 16, 2021, 9 p.m. 5.1 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.19 ppb (3) 33.7 μg/m3 (32) 14.1 μg/m3 (56) 56.0
 
April 16, 2021, 8 p.m. 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.18 ppb (3) 37.2 μg/m3 (35) 14.1 μg/m3 (56) 56.0
 
April 16, 2021, 7 p.m. 5.5 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (47) 0.21 ppb (3) 40.8 μg/m3 (38) 15.9 μg/m3 (59) 59.0
 
April 16, 2021, 6 p.m. 8.3 ppb (8) 1.5 ppb (2) N/A 7.0 ppb (7) N/A N/A 46.0 ppb (43) 0.28 ppb (4) 41.3 μg/m3 (39) 17.3 μg/m3 (62) 62.0
 
April 16, 2021, 5 p.m. 12.9 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (10) N/A N/A 38.0 ppb (36) 0.32 ppb (4) 42.3 μg/m3 (40) 18.3 μg/m3 (65) 65.0
 
April 16, 2021, 4 p.m. 20.3 ppb (20) 6.1 ppb (6) N/A 14.0 ppb (14) N/A N/A 25.0 ppb (24) 0.37 ppb (5) 56.5 μg/m3 (52) 22.2 μg/m3 (73) 73.0
 
April 16, 2021, 3 p.m. 25.1 ppb (24) 8.5 ppb (9) N/A 17.0 ppb (17) N/A N/A 17.0 ppb (16) 0.39 ppb (5) 50.8 μg/m3 (48) 24.9 μg/m3 (78) 78.0
 
April 16, 2021, 2 p.m. 17.4 ppb (17) 3.3 ppb (4) N/A 14.0 ppb (14) N/A N/A 17.0 ppb (16) 0.33 ppb (4) 38.0 μg/m3 (36) 17.8 μg/m3 (63) 63.0
 
April 16, 2021, 1 p.m. 41.7 ppb (40) 16.0 ppb (16) N/A 26.0 ppb (25) N/A N/A 0.0 ppb (0) 0.52 ppb (6) 43.8 μg/m3 (41) 8.0 μg/m3 (34) 41.0
 
April 16, 2021, noon 45.4 ppb (43) 19.3 ppb (19) N/A 26.0 ppb (25) N/A N/A -1.0 ppb (0) 0.42 ppb (5) 34.0 μg/m3 (32) 7.5 μg/m3 (32) 43.0
 
April 16, 2021, 11 a.m. 19.4 ppb (19) 2.4 ppb (3) N/A 17.0 ppb (17) N/A N/A 6.0 ppb (6) 0.33 ppb (4) 30.1 μg/m3 (28) 7.0 μg/m3 (30) 30.0
 
April 16, 2021, 10 a.m. 11.6 ppb (11) 0.3 ppb (1) N/A 11.0 ppb (11) N/A N/A 13.0 ppb (13) 0.27 ppb (4) 27.6 μg/m3 (26) 9.3 μg/m3 (39) 39.0
 
April 16, 2021, 9 a.m. 15.1 ppb (15) 0.5 ppb (1) N/A 15.0 ppb (15) N/A N/A 13.0 ppb (13) 0.32 ppb (4) 27.8 μg/m3 (26) 9.8 μg/m3 (41) 41.0
 
April 16, 2021, 8 a.m. 12.0 ppb (12) 0.3 ppb (1) N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) 0.29 ppb (4) 30.3 μg/m3 (29) 10.5 μg/m3 (44) 44.0
 
April 16, 2021, 7 a.m. 12.9 ppb (13) 0.3 ppb (1) N/A 13.0 ppb (13) N/A N/A 24.0 ppb (23) 0.3 ppb (4) 32.7 μg/m3 (31) 13.1 μg/m3 (54) 54.0
 
April 16, 2021, 6 a.m. 11.9 ppb (12) 0.2 ppb (1) N/A 12.0 ppb (12) N/A N/A 27.0 ppb (25) 0.29 ppb (4) 30.8 μg/m3 (29) 11.2 μg/m3 (47) 47.0
 
April 16, 2021, 5 a.m. 10.0 ppb (10) 0.1 ppb (1) N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) 0.24 ppb (3) 30.5 μg/m3 (29) 10.9 μg/m3 (46) 46.0
 
April 16, 2021, 4 a.m. 13.9 ppb (14) 0.1 ppb (1) N/A 14.0 ppb (14) N/A N/A 23.0 ppb (22) 0.23 ppb (3) 33.7 μg/m3 (32) 11.2 μg/m3 (47) 47.0
 
April 16, 2021, 3 a.m. 11.6 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 27.0 ppb (25) 0.23 ppb (3) 27.8 μg/m3 (26) 9.8 μg/m3 (41) 41.0
 
April 16, 2021, 2 a.m. 6.6 ppb (7) -0.1 ppb (0) N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.18 ppb (3) 22.7 μg/m3 (22) 11.0 μg/m3 (46) 46.0
 
April 16, 2021, 1 a.m. 7.9 ppb (8) 0.4 ppb (1) N/A 7.0 ppb (7) N/A N/A 38.0 ppb (36) 0.19 ppb (3) 30.8 μg/m3 (29) 10.9 μg/m3 (46) 46.0
 
April 16, 2021, midnight 8.7 ppb (9) 1.2 ppb (2) N/A 8.0 ppb (8) N/A N/A 41.0 ppb (38) 0.19 ppb (3) 41.9 μg/m3 (39) 8.8 μg/m3 (37) 39.0
 
April 15, 2021, 11 p.m. 6.2 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (44) 0.18 ppb (3) 44.6 μg/m3 (42) 8.8 μg/m3 (37) 44.0
 
April 15, 2021, 10 p.m. 4.5 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (46) 0.18 ppb (3) 32.9 μg/m3 (31) 8.5 μg/m3 (36) 46.0
 
April 15, 2021, 9 p.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (47) 0.18 ppb (3) 31.9 μg/m3 (30) 15.3 μg/m3 (58) 58.0
 
April 15, 2021, 8 p.m. 4.2 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (46) 0.17 ppb (3) 28.5 μg/m3 (27) 10.0 μg/m3 (42) 46.0
 
April 15, 2021, 7 p.m. 4.8 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (45) 0.18 ppb (3) 38.9 μg/m3 (37) 6.6 μg/m3 (28) 45.0
 
April 15, 2021, 6 p.m. 5.3 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (43) 0.22 ppb (3) 39.6 μg/m3 (37) 15.1 μg/m3 (58) 58.0
 
April 15, 2021, 5 p.m. 5.8 ppb (6) 1.4 ppb (2) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.22 ppb (3) 37.9 μg/m3 (36) 13.9 μg/m3 (55) 55.0
 
April 15, 2021, 4 p.m. 6.2 ppb (6) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (38) 0.21 ppb (3) 27.5 μg/m3 (26) 17.6 μg/m3 (63) 63.0
 
April 15, 2021, 3 p.m. 17.8 ppb (17) 4.7 ppb (5) N/A 13.0 ppb (13) N/A N/A 25.0 ppb (24) 0.32 ppb (4) 33.4 μg/m3 (31) 10.5 μg/m3 (44) 44.0
 
April 15, 2021, 2 p.m. 21.2 ppb (20) 4.6 ppb (5) N/A 17.0 ppb (17) N/A N/A 19.0 ppb (18) 0.38 ppb (5) 24.2 μg/m3 (23) 9.0 μg/m3 (38) 38.0
 
April 15, 2021, 1 p.m. 35.2 ppb (34) 7.7 ppb (8) N/A 28.0 ppb (27) N/A N/A 6.0 ppb (6) 0.41 ppb (5) 31.7 μg/m3 (30) 8.8 μg/m3 (37) 37.0
 
April 15, 2021, noon 40.6 ppb (39) 9.6 ppb (10) N/A 31.0 ppb (30) N/A N/A 0.0 ppb (0) 0.45 ppb (6) 22.0 μg/m3 (21) 9.0 μg/m3 (38) 39.0
 
April 15, 2021, 11 a.m. 23.4 ppb (23) 1.3 ppb (2) N/A 22.0 ppb (21) N/A N/A 9.0 ppb (9) 0.32 ppb (4) 26.9 μg/m3 (25) 6.8 μg/m3 (29) 29.0
 
April 15, 2021, 10 a.m. 16.5 ppb (16) 0.8 ppb (1) N/A 16.0 ppb (16) N/A N/A 16.0 ppb (15) 0.3 ppb (4) 29.3 μg/m3 (28) 6.5 μg/m3 (28) 28.0
 
April 15, 2021, 9 a.m. 14.5 ppb (14) 0.2 ppb (1) N/A 14.0 ppb (14) N/A N/A 19.0 ppb (18) 0.28 ppb (4) 18.6 μg/m3 (18) 5.8 μg/m3 (25) 25.0
 
April 15, 2021, 8 a.m. 12.8 ppb (13) 0.1 ppb (1) N/A 13.0 ppb (13) N/A N/A 22.0 ppb (21) 0.29 ppb (4) 23.5 μg/m3 (22) 5.3 μg/m3 (23) 23.0
 
April 15, 2021, 7 a.m. 6.7 ppb (7) -0.1 ppb (0) N/A 7.0 ppb (7) N/A N/A 32.0 ppb (30) 0.23 ppb (3) 24.7 μg/m3 (23) 6.8 μg/m3 (29) 30.0
 
April 15, 2021, 6 a.m. 5.6 ppb (6) -0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (33) 0.21 ppb (3) 25.9 μg/m3 (24) 7.5 μg/m3 (32) 33.0
 
April 15, 2021, 5 a.m. 6.0 ppb (6) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (34) 0.21 ppb (3) 16.6 μg/m3 (16) 8.3 μg/m3 (35) 35.0
 
April 15, 2021, 4 a.m. 4.4 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.19 ppb (3) 21.0 μg/m3 (20) 7.8 μg/m3 (33) 37.0
 
April 15, 2021, 3 a.m. 3.6 ppb (4) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.17 ppb (3) 19.8 μg/m3 (19) 6.5 μg/m3 (28) 38.0
 
April 15, 2021, 2 a.m. 2.6 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.16 ppb (3) 16.8 μg/m3 (16) 6.8 μg/m3 (29) 41.0
 
April 15, 2021, 1 a.m. 2.3 ppb (3) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.16 ppb (3) 20.6 μg/m3 (20) 9.3 μg/m3 (39) 42.0
 
April 15, 2021, midnight 2.8 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (43) 0.16 ppb (3) 23.4 μg/m3 (22) 10.5 μg/m3 (44) 44.0
 
April 14, 2021, 11 p.m. 1.4 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) 0.16 ppb (3) 18.6 μg/m3 (18) 8.3 μg/m3 (35) 45.0
 
April 14, 2021, 10 p.m. 1.5 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) 0.16 ppb (3) 19.5 μg/m3 (19) 7.8 μg/m3 (33) 45.0
 
April 14, 2021, 9 p.m. 1.2 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) 0.16 ppb (3) 26.1 μg/m3 (25) 10.8 μg/m3 (46) 46.0
 
April 14, 2021, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) 0.16 ppb (3) 17.5 μg/m3 (17) 10.1 μg/m3 (43) 46.0
 
April 14, 2021, 7 p.m. 1.6 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) 0.16 ppb (3) 22.0 μg/m3 (21) 8.5 μg/m3 (36) 45.0
 
April 14, 2021, 6 p.m. 1.7 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.16 ppb (3) 23.7 μg/m3 (22) 8.5 μg/m3 (36) 44.0
 
April 14, 2021, 5 p.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.17 ppb (3) 25.3 μg/m3 (24) 7.8 μg/m3 (33) 42.0
 
April 14, 2021, 4 p.m. 3.8 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.17 ppb (3) 23.0 μg/m3 (22) 8.5 μg/m3 (36) 39.0
 
April 14, 2021, 3 p.m. 6.9 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (37) 0.19 ppb (3) 26.1 μg/m3 (25) 7.3 μg/m3 (31) 37.0
 
April 14, 2021, 2 p.m. 12.3 ppb (12) 1.0 ppb (1) N/A 11.0 ppb (11) N/A N/A 30.0 ppb (28) 0.25 ppb (3) 24.6 μg/m3 (23) 5.8 μg/m3 (25) 28.0
 
April 14, 2021, 1 p.m. 8.6 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (9) N/A N/A 33.0 ppb (31) 0.22 ppb (3) 20.3 μg/m3 (19) 6.5 μg/m3 (28) 31.0
 
April 14, 2021, noon 4.4 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.17 ppb (3) 23.2 μg/m3 (22) 8.8 μg/m3 (37) 37.0
 
April 14, 2021, 11 a.m. 4.7 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.17 ppb (3) 19.1 μg/m3 (18) 10.1 μg/m3 (43) 43.0
 
April 14, 2021, 10 a.m. 5.2 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.16 ppb (3) 21.3 μg/m3 (20) 8.3 μg/m3 (35) 35.0
 
April 14, 2021, 9 a.m. 3.9 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.15 ppb (2) 11.9 μg/m3 (12) 7.8 μg/m3 (33) 37.0
 
April 14, 2021, 8 a.m. 2.9 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) 0.15 ppb (2) 16.3 μg/m3 (16) 7.3 μg/m3 (31) 38.0
 
April 14, 2021, 7 a.m. 4.0 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.15 ppb (2) 7.9 μg/m3 (8) 6.8 μg/m3 (29) 36.0
 
April 14, 2021, 6 a.m. 3.5 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.17 ppb (3) 16.6 μg/m3 (16) 15.3 μg/m3 (58) 58.0
 
April 14, 2021, 5 a.m. 5.0 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.18 ppb (3) 17.1 μg/m3 (16) 8.8 μg/m3 (37) 37.0
 
April 14, 2021, 4 a.m. 6.9 ppb (7) -0.1 ppb (0) N/A 7.0 ppb (7) N/A N/A 35.0 ppb (33) 0.18 ppb (3) 17.8 μg/m3 (17) 9.3 μg/m3 (39) 39.0
 
April 14, 2021, 3 a.m. 6.7 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.17 ppb (3) 11.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
April 14, 2021, 2 a.m. 3.5 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.18 ppb (3) 9.3 μg/m3 (9) 4.8 μg/m3 (20) 37.0
 
April 14, 2021, 1 a.m. 2.7 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.17 ppb (3) 15.1 μg/m3 (14) 2.4 μg/m3 (10) 38.0
 
April 14, 2021, midnight 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.17 ppb (3) 3.2 μg/m3 (3) 6.8 μg/m3 (29) 38.0
 
April 13, 2021, 11 p.m. 1.6 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.16 ppb (3) 6.1 μg/m3 (6) 5.8 μg/m3 (25) 38.0
 
April 13, 2021, 10 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.16 ppb (3) 9.8 μg/m3 (10) 2.2 μg/m3 (10) 39.0
 
April 13, 2021, 9 p.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.17 ppb (3) 13.8 μg/m3 (13) 4.9 μg/m3 (21) 39.0
 
April 13, 2021, 8 p.m. 2.1 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.17 ppb (3) 7.6 μg/m3 (8) 7.3 μg/m3 (31) 41.0
 
April 13, 2021, 7 p.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.17 ppb (3) 15.6 μg/m3 (15) 7.8 μg/m3 (33) 40.0
 
April 13, 2021, 6 p.m. 2.1 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.17 ppb (3) 18.8 μg/m3 (18) 15.6 μg/m3 (59) 59.0
 
April 13, 2021, 5 p.m. 2.1 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.17 ppb (3) 16.1 μg/m3 (15) 6.6 μg/m3 (28) 38.0
 
April 13, 2021, 4 p.m. 2.5 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) 0.17 ppb (3) 23.2 μg/m3 (22) 8.5 μg/m3 (36) 38.0
 
April 13, 2021, 3 p.m. 4.3 ppb (5) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.2 ppb (3) 24.9 μg/m3 (24) 8.0 μg/m3 (34) 35.0
 
April 13, 2021, 2 p.m. 7.0 ppb (7) 0.2 ppb (1) N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 0.2 ppb (3) 23.9 μg/m3 (23) 9.8 μg/m3 (41) 41.0
 
April 13, 2021, 1 p.m. 4.9 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.18 ppb (3) 21.0 μg/m3 (20) 8.8 μg/m3 (37) 37.0
 
April 13, 2021, noon 2.8 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.17 ppb (3) 18.8 μg/m3 (18) 7.8 μg/m3 (33) 35.0
 
April 13, 2021, 11 a.m. 2.2 ppb (3) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.16 ppb (3) 18.6 μg/m3 (18) 7.8 μg/m3 (33) 36.0
 
April 13, 2021, 10 a.m. 2.6 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.15 ppb (2) 21.8 μg/m3 (21) 5.8 μg/m3 (25) 36.0
 
April 13, 2021, 9 a.m. 1.1 ppb (2) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.16 ppb (3) 17.3 μg/m3 (17) 7.8 μg/m3 (33) 40.0