ID: 724

AQSQID: 420910013

Site Name: Norristown

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

Updated: May 26, 2022, 8:19 a.m.

Location: Plymouth Meeting (Seven Stars), PA

Reporting: True, Located: True

Current AQI: 18.0

Plymouth Meeting (Seven Stars) PA, US: 40.1122, -75.3092

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 26, 2022, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.2 μg/m3 (18) 18.0
 
May 26, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.7 μg/m3 (16) 28.0
 
May 26, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.4 μg/m3 (15) 27.0
 
May 26, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.4 μg/m3 (15) 25.0
 
May 26, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.6 μg/m3 (16) 27.0
 
May 26, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.6 μg/m3 (16) 27.0
 
May 26, 2022, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 4.1 μg/m3 (18) 31.0
 
May 25, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 4.4 μg/m3 (19) 34.0
 
May 25, 2022, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.3 μg/m3 (18) 38.0
 
May 25, 2022, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.3 μg/m3 (18) 38.0
 
May 25, 2022, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.6 μg/m3 (20) 38.0
 
May 25, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.7 μg/m3 (20) 39.0
 
May 25, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.7 μg/m3 (20) 39.0
 
May 25, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 4.8 μg/m3 (20) 41.0
 
May 25, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 4.8 μg/m3 (20) 41.0
 
May 25, 2022, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 5.2 μg/m3 (22) 39.0
 
May 25, 2022, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 5.2 μg/m3 (22) 39.0
 
May 25, 2022, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.2 μg/m3 (22) 38.0
 
May 25, 2022, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.2 μg/m3 (22) 38.0
 
May 25, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.8 μg/m3 (25) 31.0
 
May 25, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 4.8 μg/m3 (20) 27.0
 
May 25, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.1 μg/m3 (22) 22.0
 
May 25, 2022, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 4.9 μg/m3 (21) 21.0
 
May 25, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 4.4 μg/m3 (19) 20.0
 
May 25, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 4.2 μg/m3 (18) 19.0
 
May 25, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 4.3 μg/m3 (18) 27.0
 
May 25, 2022, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 4.2 μg/m3 (18) 29.0
 
May 24, 2022, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.9 μg/m3 (17) 33.0
 
May 24, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.9 μg/m3 (17) 35.0
 
May 24, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.8 μg/m3 (16) 36.0
 
May 24, 2022, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
May 24, 2022, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.6 μg/m3 (16) 35.0
 
May 24, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 4.0 μg/m3 (17) 32.0
 
May 24, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.9 μg/m3 (17) 28.0
 
May 24, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 4.0 μg/m3 (17) 27.0
 
May 24, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 3.6 μg/m3 (16) 25.0
 
May 24, 2022, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 3.8 μg/m3 (16) 24.0
 
May 24, 2022, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 4.9 μg/m3 (21) 25.0
 
May 24, 2022, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 4.6 μg/m3 (20) 30.0
 
May 24, 2022, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.5 μg/m3 (19) 35.0
 
May 24, 2022, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.1 μg/m3 (22) 22.0
 
May 24, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.4 μg/m3 (23) 32.0
 
May 24, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.4 μg/m3 (23) 32.0
 
May 24, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 5.1 μg/m3 (22) 25.0
 
May 24, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 5.1 μg/m3 (22) 25.0
 
May 24, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.4 μg/m3 (23) 27.0
 
May 24, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.4 μg/m3 (23) 27.0
 
May 24, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.2 μg/m3 (22) 31.0
 
May 24, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.2 μg/m3 (22) 31.0
 
May 24, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.4 μg/m3 (23) 34.0
 
May 24, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.4 μg/m3 (23) 34.0
 
May 24, 2022, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.2 μg/m3 (22) 38.0
 
May 24, 2022, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.2 μg/m3 (22) 38.0
 
May 23, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.2 μg/m3 (22) 41.0
 
May 23, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.2 μg/m3 (22) 41.0
 
May 23, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 4.4 μg/m3 (19) 48.0
 
May 23, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 4.2 μg/m3 (18) 46.0
 
May 23, 2022, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 4.0 μg/m3 (17) 44.0
 
May 23, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.8 μg/m3 (16) 35.0
 
May 23, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.2 μg/m3 (14) 34.0
 
May 23, 2022, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 2.9 μg/m3 (13) 27.0
 
May 23, 2022, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 2.6 μg/m3 (11) 28.0
 
May 23, 2022, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 2.6 μg/m3 (11) 28.0
 
May 23, 2022, 9 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.4 μg/m3 (10) 31.0
 
May 23, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 8.7 μg/m3 (37) 37.0
 
May 23, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 10.3 μg/m3 (43) 43.0
 
May 23, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 9.2 μg/m3 (39) 39.0
 
May 23, 2022, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 8.6 μg/m3 (36) 36.0
 
May 22, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 8.9 μg/m3 (38) 38.0
 
May 22, 2022, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 11.0 μg/m3 (46) 55.0
 
May 22, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 12.7 μg/m3 (53) 71.0
 
May 22, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 13.3 μg/m3 (54) 78.0
 
May 22, 2022, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 13.7 μg/m3 (55) 55.0
 
May 22, 2022, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 13.4 μg/m3 (54) 54.0
 
May 22, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 13.7 μg/m3 (55) 55.0
 
May 22, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 13.4 μg/m3 (54) 54.0
 
May 22, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 12.5 μg/m3 (52) 52.0
 
May 22, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 12.7 μg/m3 (53) 53.0
 
May 22, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 12.7 μg/m3 (53) 53.0
 
May 22, 2022, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 11.8 μg/m3 (50) 50.0
 
May 22, 2022, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 11.8 μg/m3 (50) 50.0
 
May 22, 2022, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 12.6 μg/m3 (53) 53.0
 
May 22, 2022, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 14.1 μg/m3 (56) 56.0
 
May 22, 2022, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 15.2 μg/m3 (58) 58.0
 
May 22, 2022, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 14.6 μg/m3 (57) 57.0
 
May 22, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 15.2 μg/m3 (58) 58.0
 
May 22, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 15.4 μg/m3 (58) 58.0
 
May 22, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 15.9 μg/m3 (59) 59.0
 
May 22, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 15.7 μg/m3 (59) 59.0
 
May 22, 2022, midnight N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 15.9 μg/m3 (59) 71.0
 
May 21, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (81) N/A N/A 15.3 μg/m3 (58) 81.0
 
May 21, 2022, 10 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 14.9 μg/m3 (57) 71.0
 
May 21, 2022, 9 p.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (84) N/A N/A 16.8 μg/m3 (61) 84.0
 
May 21, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 14.4 μg/m3 (56) 74.0
 
May 21, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 12.3 μg/m3 (52) 61.0
 
May 21, 2022, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 12.5 μg/m3 (52) 55.0
 
May 21, 2022, 5 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 12.2 μg/m3 (52) 52.0
 
May 21, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 12.0 μg/m3 (50) 50.0
 
May 21, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 15.1 μg/m3 (58) 58.0
 
May 21, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 15.5 μg/m3 (59) 59.0
 
May 21, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 12.3 μg/m3 (52) 52.0
 
May 21, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 12.3 μg/m3 (52) 52.0
 
May 21, 2022, noon N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 11.2 μg/m3 (47) 47.0
 
May 21, 2022, 10 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 10.1 μg/m3 (43) 43.0
 
May 21, 2022, 9 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 11.5 μg/m3 (48) 48.0
 
May 21, 2022, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 15.5 μg/m3 (59) 59.0
 
May 21, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 18.3 μg/m3 (65) 65.0
 
May 21, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 15.4 μg/m3 (58) 58.0
 
May 21, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 10.9 μg/m3 (46) 46.0
 
May 21, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 8.6 μg/m3 (36) 36.0
 
May 21, 2022, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 20, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 7.2 μg/m3 (31) 33.0
 
May 20, 2022, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.6 μg/m3 (24) 33.0
 
May 20, 2022, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
May 20, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 10.6 μg/m3 (45) 48.0
 
May 20, 2022, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 9.9 μg/m3 (42) 55.0
 
May 20, 2022, 5 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 10.8 μg/m3 (46) 65.0
 
May 20, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 13.3 μg/m3 (54) 61.0
 
May 20, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 14.9 μg/m3 (57) 57.0
 
May 20, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 15.2 μg/m3 (58) 58.0
 
May 20, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 15.6 μg/m3 (59) 59.0
 
May 20, 2022, 11 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 16.8 μg/m3 (61) 61.0
 
May 20, 2022, 10 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 16.4 μg/m3 (61) 61.0
 
May 20, 2022, 9 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 15.6 μg/m3 (59) 59.0
 
May 20, 2022, 8 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A N/A 14.3 μg/m3 (56) 56.0
 
May 20, 2022, 7 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 13.3 μg/m3 (54) 54.0
 
May 20, 2022, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.9 μg/m3 (53) 53.0
 
May 20, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 12.2 μg/m3 (52) 52.0
 
May 20, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 11.7 μg/m3 (49) 49.0
 
May 20, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 11.0 μg/m3 (46) 46.0
 
May 20, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 10.9 μg/m3 (46) 46.0
 
May 20, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 10.6 μg/m3 (45) 45.0
 
May 20, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 10.6 μg/m3 (45) 45.0
 
May 20, 2022, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 9.4 μg/m3 (40) 40.0
 
May 20, 2022, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 9.4 μg/m3 (40) 40.0
 
May 19, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 9.0 μg/m3 (38) 50.0
 
May 19, 2022, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 9.5 μg/m3 (40) 55.0
 
May 19, 2022, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 10.0 μg/m3 (42) 55.0
 
May 19, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 10.3 μg/m3 (43) 55.0
 
May 19, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 10.8 μg/m3 (46) 49.0
 
May 19, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 10.8 μg/m3 (46) 49.0
 
May 19, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 8.4 μg/m3 (36) 36.0
 
May 19, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 7.8 μg/m3 (33) 33.0
 
May 19, 2022, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 5.2 μg/m3 (22) 22.0
 
May 19, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 4.6 μg/m3 (20) 25.0
 
May 19, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 4.5 μg/m3 (19) 31.0
 
May 19, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 4.8 μg/m3 (20) 34.0
 
May 19, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.4 μg/m3 (23) 27.0
 
May 18, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.8 μg/m3 (16) 46.0
 
May 18, 2022, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 3.8 μg/m3 (16) 50.0
 
May 18, 2022, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 3.7 μg/m3 (16) 49.0
 
May 18, 2022, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 3.4 μg/m3 (15) 48.0
 
May 18, 2022, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.7 μg/m3 (12) 45.0
 
May 18, 2022, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.1 μg/m3 (9) 42.0
 
May 18, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.2 μg/m3 (10) 37.0
 
May 18, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.2 μg/m3 (10) 37.0
 
May 18, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.1 μg/m3 (9) 32.0
 
May 18, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.1 μg/m3 (9) 32.0
 
May 18, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.7 μg/m3 (8) 26.0
 
May 18, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.7 μg/m3 (8) 26.0
 
May 18, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
May 18, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
May 18, 2022, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.3 μg/m3 (10) 19.0
 
May 18, 2022, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.3 μg/m3 (10) 19.0
 
May 18, 2022, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.0 μg/m3 (13) 17.0
 
May 18, 2022, 10 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 3.2 μg/m3 (14) 14.0
 
May 18, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 2.1 μg/m3 (9) 27.0