ID: 99

AQSQID: 040134005

Site Name: Tempe

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

Updated: March 7, 2021, 2:32 p.m.

Location: Tempe (University Park), AZ

Reporting: True, Located: True

Current AQI: 23.0

Tempe (University Park) AZ, US: 33.4124, -111.9347

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 20.0 μg/m3 (19) 5.5 μg/m3 (23) 23.0
 
March 7, 2021, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 21.1 μg/m3 (20) 5.3 μg/m3 (23) 29.0
 
March 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 26.3 μg/m3 (25) 7.2 μg/m3 (31) 31.0
 
March 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 34.0 μg/m3 (32) 11.5 μg/m3 (48) 48.0
 
March 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 41.4 μg/m3 (39) 17.3 μg/m3 (62) 62.0
 
March 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 38.4 μg/m3 (36) 14.5 μg/m3 (57) 57.0
 
March 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 41.3 μg/m3 (39) 13.8 μg/m3 (55) 55.0
 
March 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 30.1 μg/m3 (28) 7.2 μg/m3 (31) 31.0
 
March 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 25.8 μg/m3 (24) 5.5 μg/m3 (23) 24.0
 
March 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 34.0 μg/m3 (32) 6.8 μg/m3 (29) 32.0
 
March 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 41.6 μg/m3 (39) 6.8 μg/m3 (29) 39.0
 
March 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 41.7 μg/m3 (39) 7.8 μg/m3 (33) 39.0
 
March 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 16.4 μg/m3 (16) 4.3 μg/m3 (18) 42.0
 
March 7, 2021, midnight N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A 12.2 μg/m3 (12) 0.6 μg/m3 (3) 61.0
 
March 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A 13.7 μg/m3 (13) 2.6 μg/m3 (11) 61.0
 
March 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A 18.5 μg/m3 (18) 6.2 μg/m3 (26) 58.0
 
March 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A 20.5 μg/m3 (19) 5.0 μg/m3 (21) 55.0
 
March 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 22.6 μg/m3 (21) 3.0 μg/m3 (13) 50.0
 
March 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 24.2 μg/m3 (23) 3.7 μg/m3 (16) 50.0
 
March 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 32.8 μg/m3 (31) 2.3 μg/m3 (10) 48.0
 
March 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 57.8 μg/m3 (53) 4.8 μg/m3 (20) 53.0
 
March 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 72.6 μg/m3 (60) 6.9 μg/m3 (29) 60.0
 
March 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 95.3 μg/m3 (71) 7.2 μg/m3 (31) 71.0
 
March 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 83.0 μg/m3 (65) 7.9 μg/m3 (33) 65.0
 
March 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 38.4 μg/m3 (36) 3.8 μg/m3 (16) 36.0
 
March 6, 2021, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 13.4 μg/m3 (13) 2.1 μg/m3 (9) 22.0
 
March 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 8.0 μg/m3 (8) 0.4 μg/m3 (2) 17.0
 
March 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 11.6 μg/m3 (11) 2.0 μg/m3 (9) 31.0
 
March 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 10.9 μg/m3 (11) 1.9 μg/m3 (8) 30.0
 
March 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 19.2 μg/m3 (18) 5.5 μg/m3 (23) 30.0
 
March 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 23.1 μg/m3 (22) 6.6 μg/m3 (28) 28.0
 
March 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 26.6 μg/m3 (25) 9.6 μg/m3 (40) 40.0
 
March 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 37.2 μg/m3 (35) 12.8 μg/m3 (53) 53.0
 
March 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 57.4 μg/m3 (53) 13.2 μg/m3 (54) 54.0
 
March 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 47.6 μg/m3 (45) 14.1 μg/m3 (56) 56.0
 
March 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 29.2 μg/m3 (28) 7.4 μg/m3 (31) 31.0
 
March 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 11.0 μg/m3 (11) 1.0 μg/m3 (5) 38.0
 
March 6, 2021, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 11.6 μg/m3 (11) 3.7 μg/m3 (16) 50.0
 
March 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 10.9 μg/m3 (11) 1.5 μg/m3 (7) 50.0
 
March 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 14.5 μg/m3 (14) 4.7 μg/m3 (20) 48.0
 
March 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 11.8 μg/m3 (11) 4.9 μg/m3 (21) 48.0
 
March 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 7.7 μg/m3 (8) 1.2 μg/m3 (5) 46.0
 
March 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 7.2 μg/m3 (7) 2.1 μg/m3 (9) 43.0
 
March 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 8.5 μg/m3 (8) 3.1 μg/m3 (13) 43.0
 
March 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 17.8 μg/m3 (17) 4.4 μg/m3 (19) 39.0
 
March 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 22.9 μg/m3 (22) 7.7 μg/m3 (33) 33.0
 
March 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 21.7 μg/m3 (21) 4.5 μg/m3 (19) 28.0
 
March 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 15.4 μg/m3 (15) 2.3 μg/m3 (10) 20.0
 
March 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 10.5 μg/m3 (10) 3.3 μg/m3 (14) 16.0
 
March 5, 2021, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 9.7 μg/m3 (9) 3.8 μg/m3 (16) 25.0
 
March 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 10.2 μg/m3 (10) 2.6 μg/m3 (11) 26.0
 
March 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 17.9 μg/m3 (17) 6.2 μg/m3 (26) 28.0
 
March 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 19.7 μg/m3 (19) 5.7 μg/m3 (24) 24.0
 
March 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 22.5 μg/m3 (21) 6.6 μg/m3 (28) 28.0
 
March 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 26.7 μg/m3 (25) 7.0 μg/m3 (30) 30.0
 
March 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 29.0 μg/m3 (27) 9.3 μg/m3 (39) 39.0
 
March 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 33.8 μg/m3 (32) 8.6 μg/m3 (36) 36.0
 
March 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 40.3 μg/m3 (38) 7.7 μg/m3 (33) 38.0
 
March 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 28.6 μg/m3 (27) 5.3 μg/m3 (23) 27.0
 
March 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 17.1 μg/m3 (16) 2.5 μg/m3 (11) 34.0
 
March 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 14.7 μg/m3 (14) 1.7 μg/m3 (8) 46.0
 
March 5, 2021, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 14.3 μg/m3 (14) 3.3 μg/m3 (14) 50.0
 
March 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A 16.4 μg/m3 (16) 5.6 μg/m3 (24) 51.0
 
March 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 19.7 μg/m3 (19) 6.6 μg/m3 (28) 50.0
 
March 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 26.7 μg/m3 (25) 4.1 μg/m3 (18) 50.0
 
March 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 15.1 μg/m3 (14) 2.0 μg/m3 (9) 47.0
 
March 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 18.4 μg/m3 (18) 2.7 μg/m3 (12) 43.0
 
March 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 20.8 μg/m3 (20) 6.2 μg/m3 (26) 38.0
 
March 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 14.8 μg/m3 (14) 0.9 μg/m3 (4) 32.0
 
March 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 16.6 μg/m3 (16) 1.7 μg/m3 (8) 29.0
 
March 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 28.5 μg/m3 (27) 3.8 μg/m3 (16) 27.0
 
March 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 23.5 μg/m3 (22) 4.0 μg/m3 (17) 22.0
 
March 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 14.5 μg/m3 (14) 3.5 μg/m3 (15) 15.0
 
March 4, 2021, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 7.6 μg/m3 (8) -0.9 μg/m3 (0) 19.0
 
March 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 5.3 μg/m3 (5) -1.1 μg/m3 (0) 22.0
 
March 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 6.4 μg/m3 (6) -1.0 μg/m3 (0) 24.0
 
March 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 16.8 μg/m3 (16) 0.6 μg/m3 (3) 26.0
 
March 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 35.0 μg/m3 (33) 4.0 μg/m3 (17) 33.0
 
March 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 50.9 μg/m3 (48) 3.6 μg/m3 (16) 48.0
 
March 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 37.8 μg/m3 (35) 6.1 μg/m3 (26) 35.0
 
March 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 22.0 μg/m3 (21) 3.4 μg/m3 (15) 26.0
 
March 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 19.5 μg/m3 (19) 5.7 μg/m3 (24) 36.0
 
March 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 23.8 μg/m3 (23) 4.2 μg/m3 (18) 38.0
 
March 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 35.3 μg/m3 (33) 3.3 μg/m3 (14) 38.0
 
March 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 73.5 μg/m3 (61) 8.6 μg/m3 (36) 61.0
 
March 4, 2021, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 267.3 μg/m3 (158) 15.1 μg/m3 (58) 158.0
 
March 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 212.8 μg/m3 (130) 10.6 μg/m3 (45) 130.0
 
March 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 164.8 μg/m3 (106) 5.4 μg/m3 (23) 106.0
 
March 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 68.0 μg/m3 (58) 5.2 μg/m3 (22) 58.0
 
March 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 32.4 μg/m3 (30) 5.8 μg/m3 (25) 46.0
 
March 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 27.7 μg/m3 (26) 2.2 μg/m3 (10) 46.0
 
March 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 28.2 μg/m3 (27) 1.5 μg/m3 (7) 38.0
 
March 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 27.4 μg/m3 (26) 3.5 μg/m3 (15) 31.0
 
March 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 31.7 μg/m3 (30) 2.6 μg/m3 (11) 30.0
 
March 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 70.6 μg/m3 (59) 6.8 μg/m3 (29) 59.0
 
March 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 75.2 μg/m3 (61) 9.4 μg/m3 (40) 61.0
 
March 3, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 34.7 μg/m3 (33) 6.1 μg/m3 (26) 33.0
 
March 3, 2021, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 28.6 μg/m3 (27) 4.4 μg/m3 (19) 27.0
 
March 3, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 27.5 μg/m3 (26) 8.9 μg/m3 (38) 38.0
 
March 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 23.5 μg/m3 (22) 7.9 μg/m3 (33) 33.0
 
March 3, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 21.7 μg/m3 (21) 6.1 μg/m3 (26) 26.0
 
March 3, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 25.1 μg/m3 (24) 8.9 μg/m3 (38) 38.0
 
March 3, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 17.2 μg/m3 (16) 3.6 μg/m3 (16) 22.0
 
March 3, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 20.4 μg/m3 (19) 3.3 μg/m3 (14) 31.0
 
March 3, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 34.9 μg/m3 (33) 9.6 μg/m3 (40) 40.0
 
March 3, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 49.9 μg/m3 (47) 16.0 μg/m3 (60) 60.0
 
March 3, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 53.6 μg/m3 (50) 12.4 μg/m3 (52) 52.0
 
March 3, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 36.0 μg/m3 (34) 8.1 μg/m3 (34) 34.0
 
March 3, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 13.4 μg/m3 (13) 1.9 μg/m3 (8) 33.0
 
March 3, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 13.6 μg/m3 (13) 2.1 μg/m3 (9) 49.0
 
March 2, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A 10.7 μg/m3 (10) -0.2 μg/m3 (0) 51.0
 
March 2, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A 13.1 μg/m3 (13) 0.6 μg/m3 (3) 55.0
 
March 2, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A 17.1 μg/m3 (16) 2.7 μg/m3 (12) 55.0
 
March 2, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 24.8 μg/m3 (23) 6.8 μg/m3 (29) 50.0
 
March 2, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 22.8 μg/m3 (22) 2.8 μg/m3 (12) 48.0
 
March 2, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 17.8 μg/m3 (17) 2.7 μg/m3 (12) 46.0
 
March 2, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 22.3 μg/m3 (21) 3.5 μg/m3 (15) 44.0
 
March 2, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A N/A 29.0
 
March 2, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 2, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 52.9 μg/m3 (49) 4.5 μg/m3 (19) 49.0
 
March 2, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 18.9 μg/m3 (18) 1.2 μg/m3 (5) 26.0
 
March 2, 2021, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 23.8 μg/m3 (23) 6.8 μg/m3 (29) 29.0
 
March 2, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 19.4 μg/m3 (18) 4.0 μg/m3 (17) 20.0
 
March 2, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 16.9 μg/m3 (16) 0.8 μg/m3 (4) 22.0
 
March 2, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 10.1 μg/m3 (10) -1.2 μg/m3 (0) 23.0
 
March 2, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 8.8 μg/m3 (9) -0.2 μg/m3 (0) 35.0
 
March 2, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 17.8 μg/m3 (17) 5.4 μg/m3 (23) 33.0
 
March 2, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 27.7 μg/m3 (26) 9.7 μg/m3 (41) 41.0
 
March 2, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 31.2 μg/m3 (29) 6.5 μg/m3 (28) 29.0
 
March 2, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 27.2 μg/m3 (26) 6.1 μg/m3 (26) 26.0
 
March 2, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 25.3 μg/m3 (24) 6.4 μg/m3 (27) 27.0
 
March 2, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 19.0 μg/m3 (18) 5.6 μg/m3 (24) 24.0
 
March 2, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 9.2 μg/m3 (9) 1.8 μg/m3 (8) 35.0
 
March 2, 2021, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 5.5 μg/m3 (6) -1.3 μg/m3 (0) 47.0
 
March 1, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 3.9 μg/m3 (4) -2.6 μg/m3 (0) 47.0
 
March 1, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 5.8 μg/m3 (6) -0.5 μg/m3 (0) 47.0
 
March 1, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 6.8 μg/m3 (7) 1.3 μg/m3 (6) 47.0
 
March 1, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 5.6 μg/m3 (6) -0.1 μg/m3 (0) 46.0
 
March 1, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A N/A 46.0
 
March 1, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A N/A 42.0
 
March 1, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A N/A 42.0
 
March 1, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A N/A 32.0
 
March 1, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 1, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 43.3 μg/m3 (41) 11.9 μg/m3 (50) 50.0
 
March 1, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 14.7 μg/m3 (14) 3.3 μg/m3 (14) 14.0
 
March 1, 2021, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 13.4 μg/m3 (13) 2.5 μg/m3 (11) 13.0
 
March 1, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A -0.3 μg/m3 (0) -2.7 μg/m3 (0) 13.0
 
March 1, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 2.3 μg/m3 (3) 0.0 μg/m3 (0) 21.0
 
March 1, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 7.1 μg/m3 (7) 3.9 μg/m3 (17) 24.0
 
March 1, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 4.5 μg/m3 (5) 2.9 μg/m3 (13) 31.0
 
March 1, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 5.3 μg/m3 (5) 4.0 μg/m3 (17) 41.0
 
March 1, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 2.3 μg/m3 (3) -0.2 μg/m3 (0) 41.0
 
March 1, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 2.7 μg/m3 (3) -0.6 μg/m3 (0) 38.0
 
March 1, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 7.6 μg/m3 (8) 2.1 μg/m3 (9) 40.0
 
March 1, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 5.2 μg/m3 (5) -0.6 μg/m3 (0) 42.0
 
March 1, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 4.7 μg/m3 (5) -0.4 μg/m3 (0) 42.0
 
March 1, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 3.5 μg/m3 (4) -1.9 μg/m3 (0) 45.0
 
March 1, 2021, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 7.4 μg/m3 (7) -3.4 μg/m3 (0) 47.0
 
Feb. 28, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 8.6 μg/m3 (8) 2.8 μg/m3 (12) 48.0
 
Feb. 28, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 11.4 μg/m3 (11) 0.6 μg/m3 (3) 48.0
 
Feb. 28, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 2.5 μg/m3 (3) -2.0 μg/m3 (0) 47.0
 
Feb. 28, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 9.3 μg/m3 (9) 4.1 μg/m3 (18) 46.0
 
Feb. 28, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 10.6 μg/m3 (10) 3.4 μg/m3 (15) 45.0
 
Feb. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 13.9 μg/m3 (13) 2.9 μg/m3 (13) 43.0
 
Feb. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 19.4 μg/m3 (18) -0.7 μg/m3 (0) 40.0
 
Feb. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 13.3 μg/m3 (13) N/A 40.0
 
Feb. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 6.0 μg/m3 (6) 0.3 μg/m3 (2) 38.0
 
Feb. 28, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 5.5 μg/m3 (6) -2.2 μg/m3 (0) 32.0