ID: 969

AQSQID: 320311005

Site Name: Sparks

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

Updated: March 6, 2021, 6:32 a.m.

Location: Sparks (4th St), NV

Reporting: True, Located: True

Current AQI: 41.0

Sparks (4th St) NV, US: 39.54092, -119.746764

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) 0.1 ppb (2) 29.0 μg/m3 (27) 2.0 μg/m3 (9) 41.0
 
March 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.1 ppb (2) 21.0 μg/m3 (20) 1.0 μg/m3 (5) 40.0
 
March 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.2 ppb (3) 15.0 μg/m3 (14) 2.0 μg/m3 (9) 39.0
 
March 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) 0.2 ppb (3) 18.0 μg/m3 (17) 3.0 μg/m3 (13) 38.0
 
March 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 16.0 μg/m3 (15) 2.0 μg/m3 (9) 40.0
 
March 6, 2021, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (43) 0.2 ppb (3) 48.0 μg/m3 (45) 3.0 μg/m3 (13) 45.0
 
March 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) 0.2 ppb (3) 16.0 μg/m3 (15) 2.0 μg/m3 (9) 45.0
 
March 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) 0.2 ppb (3) 11.0 μg/m3 (11) 5.0 μg/m3 (21) 46.0
 
March 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) 0.2 ppb (3) 11.0 μg/m3 (11) 7.0 μg/m3 (30) 45.0
 
March 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) 0.2 ppb (3) 22.0 μg/m3 (21) 6.0 μg/m3 (25) 41.0
 
March 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 9.0 μg/m3 (38) 38.0
 
March 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 42.0 μg/m3 (39) 14.0 μg/m3 (55) 55.0
 
March 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) 0.7 ppb (8) 80.0 μg/m3 (64) 24.0 μg/m3 (77) 77.0
 
March 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) 0.8 ppb (10) 56.0 μg/m3 (52) 19.0 μg/m3 (66) 66.0
 
March 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) 1.1 ppb (13) 58.0 μg/m3 (53) 18.0 μg/m3 (64) 64.0
 
March 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.1 ppb (13) 56.0 μg/m3 (52) 12.0 μg/m3 (50) 52.0
 
March 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.7 ppb (8) 40.0 μg/m3 (38) 11.0 μg/m3 (46) 46.0
 
March 5, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.6 ppb (7) 31.0 μg/m3 (29) 7.0 μg/m3 (30) 30.0
 
March 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.4 ppb (5) 23.0 μg/m3 (22) 7.0 μg/m3 (30) 30.0
 
March 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.6 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
March 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.6 ppb (7) N/A 17.0 μg/m3 (62) 62.0
 
March 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) 0.6 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) 0.6 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
March 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) 0.6 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
March 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 38.0
 
March 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) 0.3 ppb (4) N/A 1.0 μg/m3 (5) 36.0
 
March 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.3 ppb (4) N/A 6.0 μg/m3 (25) 39.0
 
March 5, 2021, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (46) 0.2 ppb (3) N/A 8.0 μg/m3 (34) 46.0
 
March 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) 0.2 ppb (3) N/A 7.0 μg/m3 (30) 47.0
 
March 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 49.0
 
March 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) 0.1 ppb (2) 18.0 μg/m3 (17) 4.0 μg/m3 (17) 49.0
 
March 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) 0.2 ppb (3) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 48.0
 
March 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) 0.2 ppb (3) 19.0 μg/m3 (18) 7.0 μg/m3 (30) 43.0
 
March 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) 0.4 ppb (5) 20.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) 0.5 ppb (6) 44.0 μg/m3 (41) 15.0 μg/m3 (58) 58.0
 
March 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) 0.6 ppb (7) 63.0 μg/m3 (55) 15.0 μg/m3 (58) 58.0
 
March 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) 1.1 ppb (13) 60.0 μg/m3 (54) 17.0 μg/m3 (62) 62.0
 
March 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 47.0 μg/m3 (44) 10.0 μg/m3 (42) 44.0
 
March 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) 0.5 ppb (6) 35.0 μg/m3 (33) 5.0 μg/m3 (21) 33.0
 
March 4, 2021, noon N/A N/A N/A N/A N/A N/A 3.0 ppb (3) 0.3 ppb (4) 23.0 μg/m3 (22) 3.0 μg/m3 (13) 22.0
 
March 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) 0.3 ppb (4) 20.0 μg/m3 (19) 2.0 μg/m3 (9) 19.0
 
March 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) 0.2 ppb (3) 8.0 μg/m3 (8) 4.0 μg/m3 (17) 31.0
 
March 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) 0.1 ppb (2) 12.0 μg/m3 (12) 5.0 μg/m3 (21) 43.0
 
March 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) 0.1 ppb (2) 12.0 μg/m3 (12) 4.0 μg/m3 (17) 43.0
 
March 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 40.0
 
March 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) 0.2 ppb (3) 23.0 μg/m3 (22) 7.0 μg/m3 (30) 38.0
 
March 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) 0.7 ppb (8) 43.0 μg/m3 (40) 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.9 ppb (11) 54.0 μg/m3 (50) 16.0 μg/m3 (60) 60.0
 
March 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.9 ppb (11) 46.0 μg/m3 (43) 14.0 μg/m3 (55) 55.0
 
March 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) 0.5 ppb (6) 31.0 μg/m3 (29) 7.0 μg/m3 (30) 30.0
 
March 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) 0.2 ppb (3) 16.0 μg/m3 (15) 1.0 μg/m3 (5) 32.0
 
March 4, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.1 ppb (2) 7.0 μg/m3 (7) 5.0 μg/m3 (21) 40.0
 
March 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) 0.1 ppb (2) 8.0 μg/m3 (8) 6.0 μg/m3 (25) 41.0
 
March 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.1 ppb (2) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 39.0
 
March 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) 0.1 ppb (2) 13.0 μg/m3 (13) 6.0 μg/m3 (25) 37.0
 
March 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) 0.2 ppb (3) 24.0 μg/m3 (23) 7.0 μg/m3 (30) 30.0
 
March 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) 0.4 ppb (5) 38.0 μg/m3 (36) 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) 0.6 ppb (7) 52.0 μg/m3 (49) 10.0 μg/m3 (42) 49.0
 
March 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) 0.6 ppb (7) 35.0 μg/m3 (33) 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) 0.6 ppb (7) 49.0 μg/m3 (46) 9.0 μg/m3 (38) 46.0
 
March 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.3 ppb (15) 56.0 μg/m3 (52) 10.0 μg/m3 (42) 52.0
 
March 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.3 ppb (15) 43.0 μg/m3 (40) 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.9 ppb (11) 30.0 μg/m3 (28) 5.0 μg/m3 (21) 28.0
 
March 3, 2021, noon N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.7 ppb (8) 33.0 μg/m3 (31) 6.0 μg/m3 (25) 31.0
 
March 3, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.7 ppb (8) 26.0 μg/m3 (25) 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.7 ppb (8) 36.0 μg/m3 (34) 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.6 ppb (7) 37.0 μg/m3 (35) 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.6 ppb (7) 30.0 μg/m3 (28) 14.0 μg/m3 (55) 55.0
 
March 3, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.9 ppb (11) 43.0 μg/m3 (40) 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (12) 40.0 μg/m3 (38) 14.0 μg/m3 (55) 55.0
 
March 3, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 36.0 μg/m3 (34) 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) 0.5 ppb (6) 27.0 μg/m3 (25) 6.0 μg/m3 (25) 25.0
 
March 3, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) 0.3 ppb (4) 18.0 μg/m3 (17) 1.0 μg/m3 (5) 26.0
 
March 3, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) 0.3 ppb (4) 7.0 μg/m3 (7) 0.0 μg/m3 (0) 29.0
 
March 3, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) 0.2 ppb (3) 7.0 μg/m3 (7) -1.0 μg/m3 (0) 35.0
 
March 3, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) 0.1 ppb (2) 9.0 μg/m3 (9) -2.0 μg/m3 (0) 37.0
 
March 2, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) 0.2 ppb (3) 9.0 μg/m3 (9) 1.0 μg/m3 (5) 38.0
 
March 2, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.1 ppb (2) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 39.0
 
March 2, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.1 ppb (2) 10.0 μg/m3 (10) 6.0 μg/m3 (25) 39.0
 
March 2, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) 0.2 ppb (3) 17.0 μg/m3 (16) 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) 0.3 ppb (4) 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) 0.5 ppb (6) 44.0 μg/m3 (41) 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) 0.7 ppb (8) 27.0 μg/m3 (25) 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) 0.6 ppb (7) 33.0 μg/m3 (31) 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) 1.0 ppb (12) 39.0 μg/m3 (37) 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 1.2 ppb (14) 51.0 μg/m3 (48) 12.0 μg/m3 (50) 50.0
 
March 2, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.9 ppb (11) 41.0 μg/m3 (38) 6.0 μg/m3 (25) 38.0
 
March 2, 2021, noon N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.7 ppb (8) 35.0 μg/m3 (33) 5.0 μg/m3 (21) 33.0
 
March 2, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.7 ppb (8) 21.0 μg/m3 (20) 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 25.0 μg/m3 (24) 14.0 μg/m3 (55) 55.0
 
March 2, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.9 ppb (11) 35.0 μg/m3 (33) 15.0 μg/m3 (58) 58.0
 
March 2, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.9 ppb (11) 38.0 μg/m3 (36) 16.0 μg/m3 (60) 60.0
 
March 2, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 41.0 μg/m3 (38) 17.0 μg/m3 (62) 62.0
 
March 2, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 44.0 μg/m3 (41) 12.0 μg/m3 (50) 50.0
 
March 2, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 34.0 μg/m3 (32) 14.0 μg/m3 (55) 55.0
 
March 2, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 33.0 μg/m3 (31) 13.0 μg/m3 (53) 53.0
 
March 2, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) 0.5 ppb (6) 20.0 μg/m3 (19) 0.0 μg/m3 (0) 19.0
 
March 2, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) 0.2 ppb (3) 17.0 μg/m3 (16) 3.0 μg/m3 (13) 31.0
 
March 2, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) 0.2 ppb (3) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 35.0
 
March 2, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.1 ppb (2) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 40.0
 
March 1, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) 0.1 ppb (2) 12.0 μg/m3 (12) 2.0 μg/m3 (9) 41.0
 
March 1, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) 0.2 ppb (3) 11.0 μg/m3 (11) 6.0 μg/m3 (25) 42.0
 
March 1, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 11.0 μg/m3 (11) 8.0 μg/m3 (34) 40.0
 
March 1, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
March 1, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) 0.2 ppb (3) 10.0 μg/m3 (10) 6.0 μg/m3 (25) 34.0
 
March 1, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) 0.3 ppb (4) 18.0 μg/m3 (17) 7.0 μg/m3 (30) 30.0
 
March 1, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) 0.6 ppb (7) 43.0 μg/m3 (40) 13.0 μg/m3 (53) 53.0
 
March 1, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) 0.8 ppb (10) 56.0 μg/m3 (52) 17.0 μg/m3 (62) 62.0
 
March 1, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) 1.2 ppb (14) 46.0 μg/m3 (43) 13.0 μg/m3 (53) 53.0
 
March 1, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.4 ppb (16) 51.0 μg/m3 (48) 10.0 μg/m3 (42) 48.0
 
March 1, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (12) 27.0 μg/m3 (25) 5.0 μg/m3 (21) 25.0
 
March 1, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.9 ppb (11) 25.0 μg/m3 (24) 6.0 μg/m3 (25) 25.0
 
March 1, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 22.0 μg/m3 (21) 9.0 μg/m3 (38) 38.0
 
March 1, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.8 ppb (10) 24.0 μg/m3 (23) 11.0 μg/m3 (46) 46.0
 
March 1, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.7 ppb (8) 23.0 μg/m3 (22) 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.6 ppb (7) 25.0 μg/m3 (24) 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) 0.4 ppb (5) 15.0 μg/m3 (14) 0.0 μg/m3 (0) 14.0
 
March 1, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) 0.2 ppb (3) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 24.0
 
March 1, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) 0.2 ppb (3) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 25.0
 
March 1, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) 0.2 ppb (3) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 31.0
 
March 1, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) 0.2 ppb (3) 7.0 μg/m3 (7) 0.0 μg/m3 (0) 36.0
 
March 1, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) 0.2 ppb (3) 8.0 μg/m3 (8) -1.0 μg/m3 (0) 37.0
 
March 1, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) 0.2 ppb (3) 8.0 μg/m3 (8) 0.0 μg/m3 (0) 38.0
 
March 1, 2021, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.2 ppb (3) 0.0 μg/m3 (0) 2.0 μg/m3 (9) 39.0
 
Feb. 28, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 4.0 μg/m3 (4) 3.0 μg/m3 (13) 40.0
 
Feb. 28, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 40.0
 
Feb. 28, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 40.0
 
Feb. 28, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.2 ppb (3) 4.0 μg/m3 (4) 3.0 μg/m3 (13) 39.0
 
Feb. 28, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.2 ppb (3) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 39.0
 
Feb. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) 0.2 ppb (3) 7.0 μg/m3 (7) 5.0 μg/m3 (21) 37.0
 
Feb. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) 0.2 ppb (3) 7.0 μg/m3 (7) 7.0 μg/m3 (30) 31.0
 
Feb. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) 0.3 ppb (4) 12.0 μg/m3 (12) 3.0 μg/m3 (13) 18.0
 
Feb. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) 0.5 ppb (6) 22.0 μg/m3 (21) 5.0 μg/m3 (21) 21.0
 
Feb. 28, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) 0.3 ppb (4) 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) 0.3 ppb (4) 9.0 μg/m3 (9) 0.0 μg/m3 (0) 17.0
 
Feb. 28, 2021, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (17) 0.2 ppb (3) 11.0 μg/m3 (11) -1.0 μg/m3 (0) 17.0
 
Feb. 28, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) 0.2 ppb (3) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 25.0
 
Feb. 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) 0.2 ppb (3) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 31.0
 
Feb. 28, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) 0.2 ppb (3) 9.0 μg/m3 (9) 3.0 μg/m3 (13) 28.0
 
Feb. 28, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) 0.3 ppb (4) 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
Feb. 28, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) 0.7 ppb (8) 34.0 μg/m3 (32) 16.0 μg/m3 (60) 60.0
 
Feb. 28, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (12) 60.0 μg/m3 (54) 28.0 μg/m3 (85) 85.0
 
Feb. 28, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) 0.9 ppb (11) 54.0 μg/m3 (50) 27.0 μg/m3 (83) 83.0
 
Feb. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) 0.7 ppb (8) 39.0 μg/m3 (37) 10.0 μg/m3 (42) 42.0
 
Feb. 28, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) 0.4 ppb (5) 24.0 μg/m3 (23) 8.0 μg/m3 (34) 34.0
 
Feb. 28, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) 0.3 ppb (4) 20.0 μg/m3 (19) 2.0 μg/m3 (9) 29.0
 
Feb. 28, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) 0.2 ppb (3) 7.0 μg/m3 (7) -1.0 μg/m3 (0) 38.0
 
Feb. 28, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.3 ppb (4) 9.0 μg/m3 (9) -4.0 μg/m3 (0) 40.0
 
Feb. 27, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) 0.2 ppb (3) 6.0 μg/m3 (6) -2.0 μg/m3 (0) 41.0
 
Feb. 27, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 6.0 μg/m3 (6) 2.0 μg/m3 (9) 40.0
 
Feb. 27, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 40.0
 
Feb. 27, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 40.0
 
Feb. 27, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.2 ppb (3) 5.0 μg/m3 (5) 2.0 μg/m3 (9) 40.0
 
Feb. 27, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.2 ppb (3) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 39.0
 
Feb. 27, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) 0.3 ppb (4) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 38.0
 
Feb. 27, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) 0.3 ppb (4) 11.0 μg/m3 (11) 4.0 μg/m3 (17) 25.0
 
Feb. 27, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) 0.4 ppb (5) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 21.0
 
Feb. 27, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) 0.2 ppb (3) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 25.0
 
Feb. 27, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) 0.2 ppb (3) 7.0 μg/m3 (7) 0.0 μg/m3 (0) 25.0
 
Feb. 27, 2021, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (31) 0.2 ppb (3) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 31.0
 
Feb. 27, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) 0.2 ppb (3) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 31.0
 
Feb. 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) 0.2 ppb (3) 6.0 μg/m3 (6) 0.0 μg/m3 (0) 34.0
 
Feb. 27, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) 0.2 ppb (3) 6.0 μg/m3 (6) 0.0 μg/m3 (0) 35.0
 
Feb. 27, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) 0.2 ppb (3) 8.0 μg/m3 (8) 1.0 μg/m3 (5) 38.0
 
Feb. 27, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) 0.2 ppb (3) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 38.0
 
Feb. 27, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) 0.2 ppb (3) 8.0 μg/m3 (8) 1.0 μg/m3 (5) 38.0