ID: 130

AQSQID: 060250005

Site Name: Calexico - Ethel Street

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

Updated: July 25, 2021, 4:52 a.m.

Location: Calexico (Andrade Ave), CA

Reporting: True, Located: True

Current AQI: 30.0

Calexico (Andrade Ave) CA, US: 32.67618, -115.48307

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 25, 2021, 3 a.m. 8.2 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (13) 0.14 ppb (2) 31.0 μg/m3 (29) 7.1 μg/m3 (30) 30.0
 
July 25, 2021, 2 a.m. 4.4 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (19) 0.16 ppb (3) 44.0 μg/m3 (41) 10.6 μg/m3 (45) 45.0
 
July 25, 2021, 1 a.m. 4.5 ppb (5) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) 29.0 μg/m3 (27) 4.7 μg/m3 (20) 27.0
 
July 25, 2021, midnight 5.4 ppb (6) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) 0.14 ppb (2) 21.0 μg/m3 (20) 4.4 μg/m3 (19) 31.0
 
July 24, 2021, 11 p.m. 6.1 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) 34.0 μg/m3 (32) 6.7 μg/m3 (28) 38.0
 
July 24, 2021, 10 p.m. 5.7 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) 0.17 ppb (3) 47.0 μg/m3 (44) 9.1 μg/m3 (38) 44.0
 
July 24, 2021, 9 p.m. 5.5 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) 0.17 ppb (3) 43.0 μg/m3 (40) 9.3 μg/m3 (39) 40.0
 
July 24, 2021, 8 p.m. 4.1 ppb (4) 1.5 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (40) 0.17 ppb (3) 51.0 μg/m3 (48) 12.0 μg/m3 (50) 50.0
 
July 24, 2021, 7 p.m. 3.1 ppb (3) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.14 ppb (2) 30.0 μg/m3 (28) 8.2 μg/m3 (35) 39.0
 
July 24, 2021, 6 p.m. 5.2 ppb (5) 2.2 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (38) 0.18 ppb (3) 36.0 μg/m3 (34) 5.8 μg/m3 (25) 38.0
 
July 24, 2021, 5 p.m. 5.9 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) 31.0 μg/m3 (29) 9.4 μg/m3 (40) 40.0
 
July 24, 2021, 4 p.m. 7.7 ppb (8) 3.2 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) 35.0 μg/m3 (33) 8.2 μg/m3 (35) 35.0
 
July 24, 2021, 3 p.m. 6.6 ppb (7) 2.4 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.21 ppb (3) 34.0 μg/m3 (32) 6.4 μg/m3 (27) 32.0
 
July 24, 2021, 2 p.m. 7.4 ppb (7) 2.2 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (19) 0.23 ppb (3) 24.0 μg/m3 (23) 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 1 p.m. 8.5 ppb (9) 3.2 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (13) 0.2 ppb (3) 42.0 μg/m3 (39) 9.1 μg/m3 (38) 39.0
 
July 24, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 27.0 μg/m3 (25) 6.5 μg/m3 (28) 28.0
 
July 24, 2021, 11 a.m. 5.7 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 17.0 ppb (16) 0.17 ppb (3) 24.0 μg/m3 (23) 8.3 μg/m3 (35) 35.0
 
July 24, 2021, 10 a.m. 9.2 ppb (9) 0.5 ppb (1) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 14.0 ppb (13) 0.17 ppb (3) 30.0 μg/m3 (28) 8.3 μg/m3 (35) 35.0
 
July 24, 2021, 9 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.15 ppb (2) 19.0 μg/m3 (18) 7.6 μg/m3 (32) 32.0
 
July 24, 2021, 8 a.m. 1.6 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (18) 0.15 ppb (2) 23.0 μg/m3 (22) 6.4 μg/m3 (27) 27.0
 
July 24, 2021, 7 a.m. 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (17) 0.15 ppb (2) 29.0 μg/m3 (27) 6.8 μg/m3 (29) 29.0
 
July 24, 2021, 6 a.m. 2.7 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 18.0 ppb (17) 0.16 ppb (3) 25.0 μg/m3 (24) 6.5 μg/m3 (28) 28.0
 
July 24, 2021, 5 a.m. 4.4 ppb (5) 0.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 16.0 ppb (15) 0.15 ppb (2) 30.0 μg/m3 (28) 5.8 μg/m3 (25) 28.0
 
July 24, 2021, 4 a.m. 4.4 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (17) 0.17 ppb (3) 30.0 μg/m3 (28) 9.1 μg/m3 (38) 38.0
 
July 24, 2021, 3 a.m. 7.9 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 18.0 ppb (17) 0.17 ppb (3) 48.0 μg/m3 (45) 6.4 μg/m3 (27) 45.0
 
July 24, 2021, 2 a.m. 6.2 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (19) 0.16 ppb (3) 62.0 μg/m3 (55) 5.0 μg/m3 (21) 55.0
 
July 24, 2021, 1 a.m. 3.8 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.14 ppb (2) 57.0 μg/m3 (52) 3.9 μg/m3 (17) 52.0
 
July 24, 2021, midnight 4.8 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.14 ppb (2) 45.0 μg/m3 (42) 5.0 μg/m3 (21) 42.0
 
July 23, 2021, 11 p.m. 4.3 ppb (5) 1.9 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) 0.14 ppb (2) 35.0 μg/m3 (33) 5.6 μg/m3 (24) 33.0
 
July 23, 2021, 10 p.m. 3.9 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) 0.17 ppb (3) 47.0 μg/m3 (44) 7.6 μg/m3 (32) 44.0
 
July 23, 2021, 9 p.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.13 ppb (2) 40.0 μg/m3 (38) 6.2 μg/m3 (26) 38.0
 
July 23, 2021, 8 p.m. 4.4 ppb (5) 2.2 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.13 ppb (2) 41.0 μg/m3 (38) 9.9 μg/m3 (42) 42.0
 
July 23, 2021, 7 p.m. 6.5 ppb (7) 2.5 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.13 ppb (2) 40.0 μg/m3 (38) 10.2 μg/m3 (43) 43.0
 
July 23, 2021, 6 p.m. 4.4 ppb (5) 2.4 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) 51.0 μg/m3 (48) 8.5 μg/m3 (36) 48.0
 
July 23, 2021, 5 p.m. 6.7 ppb (7) 3.5 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) 43.0 μg/m3 (40) 9.7 μg/m3 (41) 41.0
 
July 23, 2021, 4 p.m. 7.4 ppb (7) 3.6 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (20) 0.18 ppb (3) 40.0 μg/m3 (38) 6.8 μg/m3 (29) 38.0
 
July 23, 2021, 3 p.m. 3.0 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) 0.15 ppb (2) 28.0 μg/m3 (26) 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 2 p.m. 4.0 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 18.0 ppb (17) 0.17 ppb (3) 32.0 μg/m3 (30) 7.1 μg/m3 (30) 30.0
 
July 23, 2021, 1 p.m. 7.6 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (14) 0.22 ppb (3) 32.0 μg/m3 (30) 9.0 μg/m3 (38) 38.0
 
July 23, 2021, noon 2.5 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (18) 0.15 ppb (2) 20.0 μg/m3 (19) 7.7 μg/m3 (33) 33.0
 
July 23, 2021, 11 a.m. 6.5 ppb (7) 1.2 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 16.0 ppb (15) 0.19 ppb (3) 35.0 μg/m3 (33) 10.6 μg/m3 (45) 45.0
 
July 23, 2021, 10 a.m. 7.2 ppb (7) 0.5 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 13.0 ppb (13) 0.16 ppb (3) 31.0 μg/m3 (29) 5.9 μg/m3 (25) 29.0
 
July 23, 2021, 9 a.m. 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 16.0 ppb (15) 0.15 ppb (2) 26.0 μg/m3 (25) 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 8 a.m. 2.7 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (16) 0.14 ppb (2) 26.0 μg/m3 (25) 4.5 μg/m3 (19) 25.0
 
July 23, 2021, 7 a.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (16) 0.15 ppb (2) 28.0 μg/m3 (26) 5.6 μg/m3 (24) 26.0
 
July 23, 2021, 6 a.m. 3.3 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 17.0 ppb (16) 0.16 ppb (3) 32.0 μg/m3 (30) 6.2 μg/m3 (26) 30.0
 
July 23, 2021, 5 a.m. 4.1 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (19) 0.18 ppb (3) 30.0 μg/m3 (28) 8.0 μg/m3 (34) 34.0
 
July 23, 2021, 4 a.m. 5.8 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.21 ppb (3) 49.0 μg/m3 (46) 11.2 μg/m3 (47) 47.0
 
July 23, 2021, 3 a.m. 5.4 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (41) 0.22 ppb (3) 41.0 μg/m3 (38) 10.6 μg/m3 (45) 45.0
 
July 23, 2021, 2 a.m. 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (46) 0.19 ppb (3) 35.0 μg/m3 (33) 10.5 μg/m3 (44) 46.0
 
July 23, 2021, 1 a.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (46) 0.18 ppb (3) 27.0 μg/m3 (25) 8.7 μg/m3 (37) 46.0
 
July 23, 2021, midnight 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (46) 0.16 ppb (3) 39.0 μg/m3 (37) 7.6 μg/m3 (32) 46.0
 
July 22, 2021, 11 p.m. 2.7 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) N/A 34.9 μg/m3 (99) 99.0
 
July 22, 2021, 10 p.m. 7.2 ppb (7) 5.0 ppb (5) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) 0.18 ppb (3) 68.0 μg/m3 (58) 7.9 μg/m3 (33) 58.0
 
July 22, 2021, 9 p.m. 4.1 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) 0.16 ppb (3) 46.0 μg/m3 (43) 8.7 μg/m3 (37) 43.0
 
July 22, 2021, 8 p.m. 3.7 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 36.0 ppb (34) 0.18 ppb (3) 46.0 μg/m3 (43) 6.7 μg/m3 (28) 43.0
 
July 22, 2021, 7 p.m. 4.6 ppb (5) 2.4 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) 42.0 μg/m3 (39) 8.5 μg/m3 (36) 39.0
 
July 22, 2021, 6 p.m. 5.5 ppb (6) 2.6 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) 0.17 ppb (3) 43.0 μg/m3 (40) 8.0 μg/m3 (34) 40.0
 
July 22, 2021, 5 p.m. 6.6 ppb (7) 3.3 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) 44.0 μg/m3 (41) 7.0 μg/m3 (30) 41.0
 
July 22, 2021, 4 p.m. 7.9 ppb (8) 3.6 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (21) 0.2 ppb (3) 44.0 μg/m3 (41) 8.5 μg/m3 (36) 41.0
 
July 22, 2021, 3 p.m. 7.3 ppb (7) 3.5 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (17) 0.23 ppb (3) 43.0 μg/m3 (40) 7.4 μg/m3 (31) 40.0
 
July 22, 2021, 2 p.m. 6.1 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (20) 0.2 ppb (3) 33.0 μg/m3 (31) 6.4 μg/m3 (27) 31.0
 
July 22, 2021, 1 p.m. 6.8 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (18) 0.21 ppb (3) 30.0 μg/m3 (28) 8.5 μg/m3 (36) 36.0
 
July 22, 2021, noon 5.6 ppb (6) 0.2 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (21) 0.18 ppb (3) 29.0 μg/m3 (27) 11.2 μg/m3 (47) 47.0
 
July 22, 2021, 11 a.m. 3.6 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (24) 0.16 ppb (3) 26.0 μg/m3 (25) 3.2 μg/m3 (14) 25.0
 
July 22, 2021, 10 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) 0.14 ppb (2) 16.0 μg/m3 (15) 3.2 μg/m3 (14) 24.0
 
July 22, 2021, 9 a.m. 0.2 ppb (1) -0.2 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 25.0 ppb (24) 0.14 ppb (2) 19.0 μg/m3 (18) 4.8 μg/m3 (20) 24.0
 
July 22, 2021, 8 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (22) 0.15 ppb (2) 21.0 μg/m3 (20) 5.1 μg/m3 (22) 22.0
 
July 22, 2021, 7 a.m. 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (21) 0.14 ppb (2) 27.0 μg/m3 (25) 4.7 μg/m3 (20) 25.0
 
July 22, 2021, 6 a.m. 1.7 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.16 ppb (3) 78.0 μg/m3 (63) 9.0 μg/m3 (38) 63.0
 
July 22, 2021, 5 a.m. 3.6 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) 49.0 μg/m3 (46) 8.7 μg/m3 (37) 46.0
 
July 22, 2021, 4 a.m. 4.0 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) 53.0 μg/m3 (50) 9.4 μg/m3 (40) 50.0
 
July 22, 2021, 3 a.m. 9.2 ppb (9) 1.5 ppb (2) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (30) 0.21 ppb (3) 53.0 μg/m3 (50) 9.6 μg/m3 (40) 50.0
 
July 22, 2021, 2 a.m. 5.8 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) 0.17 ppb (3) 28.0 μg/m3 (26) 5.9 μg/m3 (25) 38.0
 
July 22, 2021, 1 a.m. 4.3 ppb (5) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 43.0 ppb (40) 0.17 ppb (3) 26.0 μg/m3 (25) 6.5 μg/m3 (28) 40.0
 
July 22, 2021, midnight 4.4 ppb (5) 1.4 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) 0.17 ppb (3) 26.0 μg/m3 (25) 5.3 μg/m3 (23) 41.0
 
July 21, 2021, 11 p.m. 4.5 ppb (5) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 48.0 ppb (45) 0.18 ppb (3) 42.0 μg/m3 (39) 5.9 μg/m3 (25) 45.0
 
July 21, 2021, 10 p.m. 4.3 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 57.0 ppb (58) 0.22 ppb (3) 28.0 μg/m3 (26) 5.0 μg/m3 (21) 58.0
 
July 21, 2021, 9 p.m. 3.4 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 56.0 ppb (55) 0.18 ppb (3) 22.0 μg/m3 (21) 5.3 μg/m3 (23) 55.0
 
July 21, 2021, 8 p.m. 5.1 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 54.0 ppb (50) 0.19 ppb (3) 34.0 μg/m3 (32) 7.0 μg/m3 (30) 50.0
 
July 21, 2021, 7 p.m. 12.8 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 63.0 ppb (78) 0.26 ppb (4) 51.0 μg/m3 (48) 8.3 μg/m3 (35) 78.0
 
July 21, 2021, 6 p.m. 10.7 ppb (11) 2.7 ppb (3) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 65.0 ppb (84) 0.32 ppb (4) 92.0 μg/m3 (70) 7.0 μg/m3 (30) 84.0
 
July 21, 2021, 5 p.m. 7.8 ppb (8) 2.3 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 54.0 ppb (50) 0.23 ppb (3) 30.0 μg/m3 (28) 5.3 μg/m3 (23) 50.0
 
July 21, 2021, 4 p.m. 7.3 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 43.0 ppb (40) 0.18 ppb (3) 39.0 μg/m3 (37) 8.8 μg/m3 (37) 40.0
 
July 21, 2021, 3 p.m. 11.7 ppb (12) 3.5 ppb (4) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) 31.0 μg/m3 (29) 10.5 μg/m3 (44) 44.0
 
July 21, 2021, 2 p.m. 7.5 ppb (8) 2.2 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (28) 0.19 ppb (3) 80.0 μg/m3 (64) 9.4 μg/m3 (40) 64.0
 
July 21, 2021, 1 p.m. 13.3 ppb (13) 4.3 ppb (5) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (18) 0.26 ppb (4) 62.0 μg/m3 (55) 8.5 μg/m3 (36) 55.0
 
July 21, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 36.0 μg/m3 (34) 6.8 μg/m3 (29) 34.0
 
July 21, 2021, 11 a.m. 7.2 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (28) 0.16 ppb (3) 22.0 μg/m3 (21) 7.1 μg/m3 (30) 30.0
 
July 21, 2021, 10 a.m. 6.2 ppb (6) 0.2 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) 33.0 μg/m3 (31) 8.0 μg/m3 (34) 34.0
 
July 21, 2021, 9 a.m. 3.7 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.14 ppb (2) 24.0 μg/m3 (23) 6.5 μg/m3 (28) 30.0
 
July 21, 2021, 8 a.m. 6.1 ppb (6) 0.4 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (25) 0.15 ppb (2) 29.0 μg/m3 (27) 6.4 μg/m3 (27) 27.0
 
July 21, 2021, 7 a.m. 5.2 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) 29.0 μg/m3 (27) 4.1 μg/m3 (18) 28.0
 
July 21, 2021, 6 a.m. 4.6 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) N/A 22.0 μg/m3 (21) 3.5 μg/m3 (15) 31.0
 
July 21, 2021, 5 a.m. 3.1 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.15 ppb (2) 27.0 μg/m3 (25) 2.9 μg/m3 (13) 36.0
 
July 21, 2021, 4 a.m. 7.2 ppb (7) 1.2 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) 47.0 μg/m3 (44) 4.5 μg/m3 (19) 44.0
 
July 21, 2021, 3 a.m. 9.0 ppb (9) 1.6 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 43.0 ppb (40) 0.21 ppb (3) 30.0 μg/m3 (28) 6.7 μg/m3 (28) 40.0
 
July 21, 2021, 2 a.m. 5.8 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 51.0 ppb (48) 0.15 ppb (2) 26.0 μg/m3 (25) 7.0 μg/m3 (30) 48.0
 
July 21, 2021, 1 a.m. 4.9 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 59.0 ppb (65) 0.16 ppb (3) 24.0 μg/m3 (23) 8.0 μg/m3 (34) 65.0
 
July 21, 2021, midnight 6.4 ppb (7) 1.5 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 71.0 ppb (101) 0.2 ppb (3) 36.0 μg/m3 (34) 11.7 μg/m3 (49) 101.0
 
July 20, 2021, 11 p.m. 7.9 ppb (8) 2.2 ppb (3) N/A 6.0 ppb (6) N/A 2.0 ppb (3) 86.0 ppb (109) 0.25 ppb (3) 55.0 μg/m3 (51) 11.7 μg/m3 (49) 109.0
 
July 20, 2021, 10 p.m. 10.4 ppb (10) 3.1 ppb (3) N/A 7.0 ppb (7) N/A 2.0 ppb (3) 83.0 ppb (108) 0.28 ppb (4) 59.0 μg/m3 (53) 15.5 μg/m3 (59) 108.0
 
July 20, 2021, 9 p.m. 10.0 ppb (10) 2.6 ppb (3) N/A 7.0 ppb (7) N/A 2.0 ppb (3) 78.0 ppb (105) 0.26 ppb (4) 52.0 μg/m3 (49) 11.4 μg/m3 (48) 105.0
 
July 20, 2021, 8 p.m. 9.6 ppb (10) 2.2 ppb (3) N/A 7.0 ppb (7) N/A 3.0 ppb (5) 77.0 ppb (105) 0.28 ppb (4) 56.0 μg/m3 (52) 14.4 μg/m3 (56) 105.0
 
July 20, 2021, 7 p.m. 13.0 ppb (13) 3.4 ppb (4) N/A 10.0 ppb (10) N/A 2.0 ppb (3) 67.0 ppb (91) 0.31 ppb (4) 73.0 μg/m3 (60) 13.2 μg/m3 (54) 91.0
 
July 20, 2021, 6 p.m. 10.9 ppb (11) 4.0 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 54.0 ppb (50) 0.26 ppb (4) 45.0 μg/m3 (42) 7.1 μg/m3 (30) 50.0
 
July 20, 2021, 5 p.m. 11.1 ppb (11) 4.8 ppb (5) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 38.0 ppb (36) 0.3 ppb (4) 54.0 μg/m3 (50) 9.0 μg/m3 (38) 50.0
 
July 20, 2021, 4 p.m. 13.4 ppb (13) 4.5 ppb (5) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 27.0 ppb (25) 0.29 ppb (4) 57.0 μg/m3 (52) 12.5 μg/m3 (52) 52.0
 
July 20, 2021, 3 p.m. 29.8 ppb (29) 13.2 ppb (13) N/A 17.0 ppb (17) N/A 1.0 ppb (2) 12.0 ppb (12) 0.38 ppb (5) 80.0 μg/m3 (64) 17.7 μg/m3 (63) 64.0
 
July 20, 2021, 2 p.m. 47.9 ppb (46) 29.5 ppb (28) N/A 18.0 ppb (17) N/A 1.0 ppb (2) 2.0 ppb (2) 0.51 ppb (6) 88.0 μg/m3 (68) 18.4 μg/m3 (65) 68.0
 
July 20, 2021, 1 p.m. 28.8 ppb (28) 12.0 ppb (12) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 2.0 ppb (2) 0.32 ppb (4) 46.0 μg/m3 (43) 12.8 μg/m3 (53) 53.0
 
July 20, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 46.0 μg/m3 (43) 14.9 μg/m3 (57) 57.0
 
July 20, 2021, 11 a.m. 5.9 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 9.0 ppb (9) 0.18 ppb (3) 26.0 μg/m3 (25) 10.2 μg/m3 (43) 43.0
 
July 20, 2021, 10 a.m. 4.4 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 9.0 ppb (9) 0.16 ppb (3) 24.0 μg/m3 (23) 6.7 μg/m3 (28) 28.0
 
July 20, 2021, 9 a.m. 9.3 ppb (9) 1.9 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 7.0 ppb (7) 0.18 ppb (3) 49.0 μg/m3 (46) 10.0 μg/m3 (42) 46.0
 
July 20, 2021, 8 a.m. 14.5 ppb (14) 0.9 ppb (1) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 6.0 ppb (6) 0.18 ppb (3) 25.0 μg/m3 (24) 6.8 μg/m3 (29) 29.0
 
July 20, 2021, 7 a.m. 16.9 ppb (16) 1.2 ppb (2) N/A 16.0 ppb (16) N/A 1.0 ppb (2) 6.0 ppb (6) 0.2 ppb (3) 39.0 μg/m3 (37) 11.1 μg/m3 (47) 47.0
 
July 20, 2021, 6 a.m. 12.8 ppb (13) 0.6 ppb (1) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 12.0 ppb (12) N/A 30.0 μg/m3 (28) 8.3 μg/m3 (35) 35.0
 
July 20, 2021, 5 a.m. 10.0 ppb (10) 0.4 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 14.0 ppb (13) 0.18 ppb (3) 41.0 μg/m3 (38) 14.9 μg/m3 (57) 57.0
 
July 20, 2021, 4 a.m. 10.9 ppb (11) 0.6 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 14.0 ppb (13) 0.2 ppb (3) 55.0 μg/m3 (51) 11.4 μg/m3 (48) 51.0
 
July 20, 2021, 3 a.m. 8.9 ppb (9) 0.7 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 16.0 ppb (15) 0.18 ppb (3) 47.0 μg/m3 (44) 11.6 μg/m3 (49) 49.0
 
July 20, 2021, 2 a.m. 5.6 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (24) 0.15 ppb (2) 37.0 μg/m3 (35) 5.8 μg/m3 (25) 35.0
 
July 20, 2021, 1 a.m. 4.8 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 35.0 ppb (33) 0.15 ppb (2) 38.0 μg/m3 (36) 8.5 μg/m3 (36) 36.0
 
July 20, 2021, midnight 6.6 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 55.0 ppb (51) 0.19 ppb (3) 47.0 μg/m3 (44) 8.8 μg/m3 (37) 51.0
 
July 19, 2021, 11 p.m. 6.1 ppb (6) 2.5 ppb (3) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 60.0 ppb (68) 0.17 ppb (3) 49.0 μg/m3 (46) 15.2 μg/m3 (58) 68.0
 
July 19, 2021, 10 p.m. 5.5 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 65.0 ppb (84) 0.19 ppb (3) 54.0 μg/m3 (50) 13.7 μg/m3 (55) 84.0
 
July 19, 2021, 9 p.m. 7.0 ppb (7) 2.2 ppb (3) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 64.0 ppb (81) 0.19 ppb (3) 49.0 μg/m3 (46) 8.7 μg/m3 (37) 81.0
 
July 19, 2021, 8 p.m. 9.0 ppb (9) 3.4 ppb (4) N/A 6.0 ppb (6) N/A 3.0 ppb (5) 69.0 ppb (97) 0.25 ppb (3) 63.0 μg/m3 (55) 16.7 μg/m3 (61) 97.0
 
July 19, 2021, 7 p.m. 13.8 ppb (14) 3.8 ppb (4) N/A 10.0 ppb (10) N/A 3.0 ppb (5) 78.0 ppb (105) 0.33 ppb (4) 75.0 μg/m3 (61) 14.0 μg/m3 (55) 105.0
 
July 19, 2021, 6 p.m. 7.8 ppb (8) 2.4 ppb (3) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 58.0 ppb (61) 0.25 ppb (3) 50.0 μg/m3 (47) 11.9 μg/m3 (50) 61.0
 
July 19, 2021, 5 p.m. 9.1 ppb (9) 4.7 ppb (5) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 41.0 ppb (38) 0.22 ppb (3) 58.0 μg/m3 (53) 12.5 μg/m3 (52) 53.0
 
July 19, 2021, 4 p.m. 9.3 ppb (9) 4.1 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 30.0 ppb (28) 0.25 ppb (3) 45.0 μg/m3 (42) 10.0 μg/m3 (42) 42.0
 
July 19, 2021, 3 p.m. 17.2 ppb (17) 8.2 ppb (8) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 17.0 ppb (16) 0.26 ppb (4) 44.0 μg/m3 (41) 12.5 μg/m3 (52) 52.0
 
July 19, 2021, 2 p.m. 23.3 ppb (22) 10.7 ppb (11) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 10.0 ppb (10) 0.31 ppb (4) 58.0 μg/m3 (53) 16.1 μg/m3 (60) 60.0
 
July 19, 2021, 1 p.m. 20.7 ppb (20) 8.1 ppb (8) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 10.0 ppb (10) 0.26 ppb (4) 47.0 μg/m3 (44) 11.7 μg/m3 (49) 49.0
 
July 19, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 27.0 μg/m3 (25) 7.4 μg/m3 (31) 31.0
 
July 19, 2021, 11 a.m. 4.0 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 11.0 ppb (11) 0.18 ppb (3) 26.0 μg/m3 (25) 7.9 μg/m3 (33) 33.0
 
July 19, 2021, 10 a.m. 10.8 ppb (11) 2.3 ppb (3) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 6.0 ppb (6) 0.19 ppb (3) 26.0 μg/m3 (25) 9.4 μg/m3 (40) 40.0
 
July 19, 2021, 9 a.m. 20.1 ppb (19) 5.8 ppb (6) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 2.0 ppb (2) 0.18 ppb (3) 23.0 μg/m3 (22) 8.8 μg/m3 (37) 37.0
 
July 19, 2021, 8 a.m. 20.9 ppb (20) 3.9 ppb (4) N/A 17.0 ppb (17) N/A 1.0 ppb (2) 1.0 ppb (1) 0.17 ppb (3) 29.0 μg/m3 (27) 8.8 μg/m3 (37) 37.0
 
July 19, 2021, 7 a.m. 8.1 ppb (8) 0.2 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 12.0 ppb (12) 0.17 ppb (3) 23.0 μg/m3 (22) 7.6 μg/m3 (32) 32.0
 
July 19, 2021, 6 a.m. 10.6 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 9.0 ppb (9) 0.19 ppb (3) 28.0 μg/m3 (26) 9.4 μg/m3 (40) 40.0
 
July 19, 2021, 5 a.m. 7.5 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 12.0 ppb (12) 0.21 ppb (3) 33.0 μg/m3 (31) 7.0 μg/m3 (30) 31.0
 
July 19, 2021, 4 a.m. 7.7 ppb (8) 0.3 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 11.0 ppb (11) 0.18 ppb (3) 49.0 μg/m3 (46) 8.2 μg/m3 (35) 46.0
 
July 19, 2021, 3 a.m. 7.4 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (13) 0.16 ppb (3) 42.0 μg/m3 (39) 5.4 μg/m3 (23) 39.0
 
July 19, 2021, 2 a.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.14 ppb (2) 27.0 μg/m3 (25) 3.6 μg/m3 (16) 25.0
 
July 19, 2021, 1 a.m. 2.5 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) 0.13 ppb (2) 30.0 μg/m3 (28) 4.7 μg/m3 (20) 28.0
 
July 19, 2021, midnight 2.8 ppb (3) 1.5 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.12 ppb (2) 33.0 μg/m3 (31) 4.8 μg/m3 (20) 31.0
 
July 18, 2021, 11 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) 0.13 ppb (2) 27.0 μg/m3 (25) 4.2 μg/m3 (18) 28.0
 
July 18, 2021, 10 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) 0.13 ppb (2) 39.0 μg/m3 (37) 7.0 μg/m3 (30) 37.0
 
July 18, 2021, 9 p.m. 1.9 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) 0.13 ppb (2) 32.0 μg/m3 (30) 6.8 μg/m3 (29) 31.0
 
July 18, 2021, 8 p.m. 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) 29.0 μg/m3 (27) 3.5 μg/m3 (15) 32.0
 
July 18, 2021, 7 p.m. 3.1 ppb (3) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 41.0 ppb (38) 0.15 ppb (2) 24.0 μg/m3 (23) 4.5 μg/m3 (19) 38.0
 
July 18, 2021, 6 p.m. 3.8 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) 0.18 ppb (3) 22.0 μg/m3 (21) 5.8 μg/m3 (25) 40.0
 
July 18, 2021, 5 p.m. 5.5 ppb (6) 2.5 ppb (3) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 37.0 ppb (35) 0.17 ppb (3) 25.0 μg/m3 (24) 10.0 μg/m3 (42) 42.0
 
July 18, 2021, 4 p.m. 10.2 ppb (10) 4.5 ppb (5) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 23.0 ppb (22) 0.18 ppb (3) 25.0 μg/m3 (24) 10.2 μg/m3 (43) 43.0
 
July 18, 2021, 3 p.m. 9.9 ppb (10) 4.7 ppb (5) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 16.0 ppb (15) 0.17 ppb (3) 23.0 μg/m3 (22) 8.2 μg/m3 (35) 35.0
 
July 18, 2021, 2 p.m. 8.9 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (13) 0.18 ppb (3) 26.0 μg/m3 (25) 14.1 μg/m3 (56) 56.0
 
July 18, 2021, 1 p.m. 4.7 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (13) 0.17 ppb (3) 20.0 μg/m3 (19) 6.1 μg/m3 (26) 26.0
 
July 18, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 6.1 μg/m3 (26) 26.0
 
July 18, 2021, 11 a.m. 4.4 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 11.0 ppb (11) 0.15 ppb (2) 27.0 μg/m3 (25) 6.8 μg/m3 (29) 29.0
 
July 18, 2021, 10 a.m. 5.1 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 13.0 ppb (13) 0.18 ppb (3) 21.0 μg/m3 (20) 5.8 μg/m3 (25) 25.0
 
July 18, 2021, 9 a.m. 12.6 ppb (12) 0.6 ppb (1) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 11.0 ppb (11) 0.21 ppb (3) 18.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
July 18, 2021, 8 a.m. 7.5 ppb (8) 0.4 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 17.0 ppb (16) 0.2 ppb (3) 23.0 μg/m3 (22) 9.4 μg/m3 (40) 40.0
 
July 18, 2021, 7 a.m. 5.6 ppb (6) 0.1 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (17) 0.19 ppb (3) 26.0 μg/m3 (25) 6.7 μg/m3 (28) 28.0
 
July 18, 2021, 6 a.m. 6.5 ppb (7) 0.1 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (16) 0.18 ppb (3) 29.0 μg/m3 (27) 6.1 μg/m3 (26) 27.0
 
July 18, 2021, 5 a.m. 6.3 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 16.0 ppb (15) 0.23 ppb (3) 42.0 μg/m3 (39) 5.9 μg/m3 (25) 39.0
 
July 18, 2021, 4 a.m. 6.8 ppb (7) 0.5 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (16) 0.24 ppb (3) 41.0 μg/m3 (38) 6.8 μg/m3 (29) 38.0