AQSQID: 330150018

Site Name: Londonderry - Moose Hill

Location: Londonderry, NH

Reporting: True, Located: True

Current AQI: 31.0

Londonderry NH, US: 42.862537, -71.380173

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 25, 2019, 5 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 31.0
 
May 25, 2019, 4 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) 10.0 μg/m3 (9) -1.0 μg/m3 (0) 32.0
 
May 25, 2019, 3 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.12 ppb (1) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 30.0
 
May 25, 2019, 2 p.m. N/A N/A 2.3 ppb (2) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 29.0
 
May 25, 2019, 1 p.m. N/A N/A 2.3 ppb (2) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
May 25, 2019, noon N/A N/A 2.3 ppb (2) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) -1.0 μg/m3 (0) 4.0 μg/m3 (17) 21.0
 
May 25, 2019, 11 a.m. N/A N/A 2.2 ppb (2) N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.13 ppb (1) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 16.0
 
May 25, 2019, 10 a.m. N/A N/A 1.9 ppb (2) N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.13 ppb (1) 9.0 μg/m3 (8) 1.0 μg/m3 (4) 10.0
 
May 25, 2019, 9 a.m. N/A N/A 1.6 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.13 ppb (1) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
May 25, 2019, 8 a.m. N/A N/A 1.9 ppb (2) N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.1 ppb (1) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 12.0
 
May 25, 2019, 7 a.m. N/A N/A 2.5 ppb (2) N/A N/A 0.0 ppb (0) 8.0 ppb (6) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
May 25, 2019, 6 a.m. N/A N/A 2.6 ppb (2) N/A N/A N/A 9.0 ppb (7) 0.15 ppb (2) 0.0 μg/m3 (0) 5.0 μg/m3 (21) 21.0
 
May 25, 2019, 5 a.m. N/A N/A 2.9 ppb (3) N/A N/A N/A 10.0 ppb (8) 0.15 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 17.0
 
May 25, 2019, 4 a.m. N/A N/A 2.8 ppb (3) N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.15 ppb (2) 1.0 μg/m3 (1) 5.0 μg/m3 (21) 21.0
 
May 25, 2019, 3 a.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.15 ppb (2) -1.0 μg/m3 (0) 8.0 μg/m3 (33) 33.0
 
May 25, 2019, 2 a.m. N/A N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.12 ppb (1) 1.0 μg/m3 (1) 6.0 μg/m3 (25) 25.0
 
May 25, 2019, 1 a.m. N/A N/A 1.9 ppb (2) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 24.0
 
May 25, 2019, midnight N/A N/A 1.9 ppb (2) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) 1.0 μg/m3 (1) 5.0 μg/m3 (21) 26.0
 
May 24, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 27.0
 
May 24, 2019, 10 p.m. N/A N/A 1.8 ppb (2) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 28.0
 
May 24, 2019, 9 p.m. N/A N/A 1.8 ppb (2) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 31.0
 
May 24, 2019, 8 p.m. N/A N/A 1.9 ppb (2) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.1 ppb (1) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 32.0
 
May 24, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 34.0
 
May 24, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 33.0
 
May 24, 2019, 5 p.m. N/A N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 34.0
 
May 24, 2019, 4 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 35.0
 
May 24, 2019, 3 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 34.0
 
May 24, 2019, 2 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.11 ppb (1) 12.0 μg/m3 (11) 2.0 μg/m3 (8) 32.0
 
May 24, 2019, 1 p.m. N/A N/A 2.2 ppb (2) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 28.0
 
May 24, 2019, noon N/A N/A 2.2 ppb (2) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 25.0
 
May 24, 2019, 11 a.m. N/A N/A 2.4 ppb (2) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 10 a.m. N/A N/A 2.5 ppb (2) N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
May 24, 2019, 9 a.m. N/A N/A 2.8 ppb (3) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.15 ppb (2) -3.0 μg/m3 (0) 5.0 μg/m3 (21) 21.0
 
May 24, 2019, 8 a.m. N/A N/A 2.9 ppb (3) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.12 ppb (1) -1.0 μg/m3 (0) 2.0 μg/m3 (8) 22.0
 
May 24, 2019, 7 a.m. N/A N/A 3.1 ppb (3) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.16 ppb (2) 0.0 μg/m3 (0) 2.0 μg/m3 (8) 25.0
 
May 24, 2019, 6 a.m. N/A N/A 3.2 ppb (3) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) 2.0 μg/m3 (2) 3.0 μg/m3 (12) 22.0
 
May 24, 2019, 5 a.m. N/A N/A 3.2 ppb (3) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 22.0
 
May 24, 2019, 4 a.m. N/A N/A 3.2 ppb (3) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 20.0
 
May 24, 2019, 3 a.m. N/A N/A 3.2 ppb (3) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 25.0
 
May 24, 2019, 2 a.m. N/A N/A 3.1 ppb (3) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.11 ppb (1) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 28.0
 
May 24, 2019, 1 a.m. N/A N/A 3.1 ppb (3) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 28.0
 
May 24, 2019, midnight N/A N/A 3.2 ppb (3) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 31.0
 
May 23, 2019, 11 p.m. N/A N/A 3.4 ppb (3) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 32.0
 
May 23, 2019, 10 p.m. N/A N/A 3.5 ppb (3) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 33.0
 
May 23, 2019, 9 p.m. N/A N/A 3.5 ppb (3) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 35.0
 
May 23, 2019, 8 p.m. N/A N/A 3.6 ppb (3) N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.12 ppb (1) 2.0 μg/m3 (2) 6.0 μg/m3 (25) 38.0
 
May 23, 2019, 7 p.m. N/A N/A 3.7 ppb (3) N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) 8.0 μg/m3 (7) 6.0 μg/m3 (25) 39.0
 
May 23, 2019, 6 p.m. N/A N/A 3.7 ppb (3) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.15 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 38.0
 
May 23, 2019, 5 p.m. N/A N/A 3.7 ppb (3) N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) 12.0 μg/m3 (11) 5.0 μg/m3 (21) 37.0
 
May 23, 2019, 4 p.m. N/A N/A 3.8 ppb (4) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) 14.0 μg/m3 (13) 3.0 μg/m3 (12) 36.0
 
May 23, 2019, 3 p.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 35.0
 
May 23, 2019, 2 p.m. N/A N/A 4.1 ppb (4) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) 8.0 μg/m3 (7) 6.0 μg/m3 (25) 32.0
 
May 23, 2019, 1 p.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 27.0
 
May 23, 2019, noon N/A N/A 2.9 ppb (3) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 25.0
 
May 23, 2019, 11 a.m. N/A N/A 2.4 ppb (2) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 25.0
 
May 23, 2019, 10 a.m. N/A N/A 2.3 ppb (2) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 25.0
 
May 23, 2019, 9 a.m. N/A N/A 2.2 ppb (2) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 25.0
 
May 23, 2019, 8 a.m. N/A N/A 2.3 ppb (2) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) 4.0 μg/m3 (4) 5.0 μg/m3 (21) 25.0
 
May 23, 2019, 7 a.m. N/A N/A 2.4 ppb (2) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.11 ppb (1) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 25.0
 
May 23, 2019, 6 a.m. N/A N/A 2.7 ppb (3) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.12 ppb (1) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 26.0
 
May 23, 2019, 5 a.m. N/A N/A 3.7 ppb (3) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.12 ppb (1) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 25.0
 
May 23, 2019, 4 a.m. N/A N/A 4.6 ppb (4) N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.13 ppb (1) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 23.0
 
May 23, 2019, 3 a.m. N/A N/A 4.3 ppb (4) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.14 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 22.0
 
May 23, 2019, 2 a.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 25.0
 
May 23, 2019, 1 a.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.12 ppb (1) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 26.0
 
May 23, 2019, midnight N/A N/A 3.1 ppb (3) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 25.0
 
May 22, 2019, 11 p.m. N/A N/A 1.9 ppb (2) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 2.0 μg/m3 (2) 5.0 μg/m3 (21) 28.0
 
May 22, 2019, 10 p.m. N/A N/A 1.6 ppb (1) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) -2.0 μg/m3 (0) 1.0 μg/m3 (4) 36.0
 
May 22, 2019, 9 p.m. N/A N/A 1.6 ppb (1) N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) 0.0 μg/m3 (0) 2.0 μg/m3 (8) 36.0
 
May 22, 2019, 8 p.m. N/A N/A 1.6 ppb (1) N/A N/A N/A 47.0 ppb (36) 0.08 ppb (1) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 36.0
 
May 22, 2019, 7 p.m. N/A N/A 1.6 ppb (1) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.11 ppb (1) 7.0 μg/m3 (6) -1.0 μg/m3 (0) 35.0
 
May 22, 2019, 6 p.m. N/A N/A 1.5 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.11 ppb (1) 10.0 μg/m3 (9) -1.0 μg/m3 (0) 35.0
 
May 22, 2019, 5 p.m. N/A N/A 1.4 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.11 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 34.0
 
May 22, 2019, 4 p.m. N/A N/A 1.4 ppb (1) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.12 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 30.0
 
May 22, 2019, 3 p.m. N/A N/A 1.3 ppb (1) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) 16.0 μg/m3 (15) 1.0 μg/m3 (4) 29.0
 
May 22, 2019, 2 p.m. N/A N/A 1.3 ppb (1) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A N/A 28.0
 
May 22, 2019, 1 p.m. N/A N/A 1.3 ppb (1) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.11 ppb (1) 29.0 μg/m3 (26) 0.0 μg/m3 (0) 26.0
 
May 22, 2019, noon N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.11 ppb (1) N/A N/A 25.0
 
May 22, 2019, 11 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.11 ppb (1) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 26.0
 
May 22, 2019, 10 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.11 ppb (1) 12.0 μg/m3 (11) 1.0 μg/m3 (4) 28.0
 
May 22, 2019, 9 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.11 ppb (1) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 28.0
 
May 22, 2019, 8 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 28.0
 
May 22, 2019, 7 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.11 ppb (1) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 28.0
 
May 22, 2019, 6 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.11 ppb (1) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 27.0
 
May 22, 2019, 5 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.11 ppb (1) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 28.0
 
May 22, 2019, 4 a.m. N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.11 ppb (1) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 28.0
 
May 22, 2019, 3 a.m. N/A N/A 1.1 ppb (1) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) 11.0 μg/m3 (10) 5.0 μg/m3 (21) 29.0
 
May 22, 2019, 2 a.m. N/A N/A 1.1 ppb (1) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.09 ppb (1) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 30.0
 
May 22, 2019, 1 a.m. N/A N/A 1.1 ppb (1) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.11 ppb (1) 12.0 μg/m3 (11) 3.0 μg/m3 (12) 30.0
 
May 22, 2019, midnight N/A N/A 1.2 ppb (1) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) 14.0 μg/m3 (13) 3.0 μg/m3 (12) 29.0
 
May 21, 2019, 11 p.m. N/A N/A 1.3 ppb (1) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.11 ppb (1) 16.0 μg/m3 (15) -1.0 μg/m3 (0) 30.0
 
May 21, 2019, 10 p.m. N/A N/A 1.3 ppb (1) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.11 ppb (1) 10.0 μg/m3 (9) -2.0 μg/m3 (0) 30.0
 
May 21, 2019, 9 p.m. N/A N/A 1.3 ppb (1) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) 12.0 μg/m3 (11) 3.0 μg/m3 (12) 29.0
 
May 21, 2019, 8 p.m. N/A N/A 1.3 ppb (1) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.09 ppb (1) 19.0 μg/m3 (17) 5.0 μg/m3 (21) 28.0
 
May 21, 2019, 7 p.m. N/A N/A 1.3 ppb (1) N/A N/A N/A 38.0 ppb (29) 0.11 ppb (1) 26.0 μg/m3 (24) 0.0 μg/m3 (0) 29.0
 
May 21, 2019, 6 p.m. N/A N/A 1.3 ppb (1) N/A N/A N/A 36.0 ppb (28) 0.1 ppb (1) 17.0 μg/m3 (15) 1.0 μg/m3 (4) 28.0
 
May 21, 2019, 5 p.m. N/A N/A 1.3 ppb (1) N/A N/A 1.0 ppb (1) 35.0 ppb (27) 0.1 ppb (1) 19.0 μg/m3 (17) 0.0 μg/m3 (0) 27.0
 
May 21, 2019, 4 p.m. N/A N/A 1.3 ppb (1) N/A N/A 1.0 ppb (1) 34.0 ppb (26) 0.11 ppb (1) 24.0 μg/m3 (22) 2.0 μg/m3 (8) 26.0
 
May 21, 2019, 3 p.m. N/A N/A 1.3 ppb (1) N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.11 ppb (1) 24.0 μg/m3 (22) 2.0 μg/m3 (8) 25.0
 
May 21, 2019, 2 p.m. N/A N/A 1.3 ppb (1) N/A N/A 1.0 ppb (1) 35.0 ppb (27) 0.08 ppb (1) 21.0 μg/m3 (19) 3.0 μg/m3 (12) 27.0
 
May 21, 2019, 1 p.m. N/A N/A 1.3 ppb (1) N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.11 ppb (1) 34.0 μg/m3 (31) 1.0 μg/m3 (4) 31.0
 
May 21, 2019, noon N/A N/A 1.4 ppb (1) N/A N/A 1.0 ppb (1) 28.0 ppb (22) 0.11 ppb (1) 15.0 μg/m3 (14) 0.0 μg/m3 (0) 22.0
 
May 21, 2019, 11 a.m. N/A N/A 1.4 ppb (1) N/A N/A 1.0 ppb (1) 26.0 ppb (20) 0.11 ppb (1) 46.0 μg/m3 (42) 1.0 μg/m3 (4) 42.0
 
May 21, 2019, 10 a.m. N/A N/A 1.5 ppb (1) N/A N/A 1.0 ppb (1) 25.0 ppb (19) 0.12 ppb (1) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 19.0
 
May 21, 2019, 9 a.m. N/A N/A 1.6 ppb (1) N/A N/A 1.0 ppb (1) N/A 0.12 ppb (1) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 10.0
 
May 21, 2019, 8 a.m. N/A N/A 1.7 ppb (2) N/A N/A 1.0 ppb (1) 30.0 ppb (23) 0.09 ppb (1) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 23.0
 
May 21, 2019, 7 a.m. N/A N/A 1.8 ppb (2) N/A N/A 1.0 ppb (1) 33.0 ppb (25) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 25.0
 
May 21, 2019, 6 a.m. N/A N/A 1.8 ppb (2) N/A N/A N/A 37.0 ppb (28) 0.12 ppb (1) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 28.0
 
May 21, 2019, 5 a.m. N/A N/A 1.8 ppb (2) N/A N/A N/A 39.0 ppb (30) 0.12 ppb (1) 17.0 μg/m3 (15) 1.0 μg/m3 (4) 30.0
 
May 21, 2019, 4 a.m. N/A N/A 1.8 ppb (2) N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.13 ppb (1) 26.0 μg/m3 (24) 5.0 μg/m3 (21) 31.0
 
May 21, 2019, 3 a.m. N/A N/A 1.7 ppb (2) N/A N/A 1.0 ppb (1) 42.0 ppb (32) 0.13 ppb (1) 13.0 μg/m3 (12) 7.0 μg/m3 (29) 32.0
 
May 21, 2019, 2 a.m. N/A N/A 1.9 ppb (2) N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.12 ppb (1) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
May 21, 2019, 1 a.m. N/A N/A 2.7 ppb (3) N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.17 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 28.0
 
May 21, 2019, midnight N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 36.0 ppb (28) 0.18 ppb (2) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 28.0
 
May 20, 2019, 11 p.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 48.0 ppb (37) 0.16 ppb (2) 8.0 μg/m3 (7) 6.0 μg/m3 (25) 37.0
 
May 20, 2019, 10 p.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 50.0 ppb (38) 0.15 ppb (2) 7.0 μg/m3 (6) 7.0 μg/m3 (29) 38.0
 
May 20, 2019, 9 p.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 47.0 ppb (36) 0.16 ppb (2) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 36.0
 
May 20, 2019, 8 p.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.14 ppb (2) 6.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, 7 p.m. N/A N/A 2.7 ppb (3) N/A N/A 1.0 ppb (1) 42.0 ppb (32) 0.17 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 32.0
 
May 20, 2019, 6 p.m. N/A N/A 2.9 ppb (3) N/A N/A 1.0 ppb (1) 49.0 ppb (38) 0.16 ppb (2) 16.0 μg/m3 (15) 3.0 μg/m3 (12) 38.0
 
May 20, 2019, 5 p.m. N/A N/A 3.0 ppb (3) N/A N/A 1.0 ppb (1) 50.0 ppb (38) 0.16 ppb (2) 22.0 μg/m3 (20) 5.0 μg/m3 (21) 38.0
 
May 20, 2019, 4 p.m. N/A N/A 3.0 ppb (3) N/A N/A 1.0 ppb (1) 50.0 ppb (38) 0.17 ppb (2) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 38.0
 
May 20, 2019, 3 p.m. N/A N/A 3.5 ppb (3) N/A N/A 1.0 ppb (1) 47.0 ppb (36) 0.17 ppb (2) 18.0 μg/m3 (16) 7.0 μg/m3 (29) 36.0
 
May 20, 2019, 2 p.m. N/A N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) 43.0 ppb (33) 0.15 ppb (2) 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
May 20, 2019, 1 p.m. N/A N/A 4.5 ppb (4) N/A N/A 1.0 ppb (1) 38.0 ppb (29) 0.21 ppb (2) 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, noon N/A N/A 4.1 ppb (4) N/A N/A 1.0 ppb (1) 34.0 ppb (26) 0.2 ppb (2) 16.0 μg/m3 (15) 7.0 μg/m3 (29) 29.0
 
May 20, 2019, 11 a.m. N/A N/A 3.3 ppb (3) N/A N/A 1.0 ppb (1) 34.0 ppb (26) 0.18 ppb (2) 2.0 μg/m3 (2) 6.0 μg/m3 (25) 26.0
 
May 20, 2019, 10 a.m. N/A N/A 2.7 ppb (3) N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.17 ppb (2) 16.0 μg/m3 (15) 3.0 μg/m3 (12) 28.0
 
May 20, 2019, 9 a.m. N/A N/A 2.5 ppb (2) N/A N/A 1.0 ppb (1) 39.0 ppb (30) 0.16 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 30.0
 
May 20, 2019, 8 a.m. N/A N/A 2.5 ppb (2) N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.13 ppb (1) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 31.0
 
May 20, 2019, 7 a.m. N/A N/A 2.5 ppb (2) N/A N/A 1.0 ppb (1) 39.0 ppb (30) 0.16 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 30.0
 
May 20, 2019, 6 a.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 39.0 ppb (30) 0.16 ppb (2) 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
May 20, 2019, 5 a.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.15 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 31.0
 
May 20, 2019, 4 a.m. N/A N/A 2.7 ppb (3) N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.15 ppb (2) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 31.0
 
May 20, 2019, 3 a.m. N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.15 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 32.0
 
May 20, 2019, 2 a.m. N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 42.0 ppb (32) 0.12 ppb (1) 20.0 μg/m3 (18) 5.0 μg/m3 (21) 32.0
 
May 20, 2019, 1 a.m. N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 44.0 ppb (34) 0.16 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 34.0
 
May 20, 2019, midnight N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 46.0 ppb (35) 0.16 ppb (2) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 35.0
 
May 19, 2019, 11 p.m. N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 49.0 ppb (38) 0.16 ppb (2) 21.0 μg/m3 (19) 4.0 μg/m3 (17) 38.0
 
May 19, 2019, 10 p.m. N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 51.0 ppb (39) 0.17 ppb (2) 23.0 μg/m3 (21) 6.0 μg/m3 (25) 39.0
 
May 19, 2019, 9 p.m. N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 52.0 ppb (40) 0.16 ppb (2) 28.0 μg/m3 (25) 4.0 μg/m3 (17) 40.0
 
May 19, 2019, 8 p.m. N/A N/A 2.9 ppb (3) N/A N/A 1.0 ppb (1) 49.0 ppb (38) 0.13 ppb (1) 17.0 μg/m3 (15) 2.0 μg/m3 (8) 38.0
 
May 19, 2019, 7 p.m. N/A N/A 2.9 ppb (3) N/A N/A 1.0 ppb (1) 48.0 ppb (37) N/A 18.0 μg/m3 (16) 4.0 μg/m3 (17) 37.0
 
May 19, 2019, 6 p.m. N/A N/A 2.9 ppb (3) N/A N/A N/A 46.0 ppb (35) 0.16 ppb (2) 11.0 μg/m3 (10) 5.0 μg/m3 (21) 35.0
 
May 19, 2019, 5 p.m. N/A N/A 3.0 ppb (3) N/A N/A 1.0 ppb (1) 46.0 ppb (35) 0.16 ppb (2) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 35.0
 
May 19, 2019, 4 p.m. N/A N/A 3.1 ppb (3) N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.16 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 32.0
 
May 19, 2019, 3 p.m. N/A N/A 3.4 ppb (3) N/A N/A 1.0 ppb (1) 36.0 ppb (28) 0.16 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 28.0
 
May 19, 2019, 2 p.m. N/A N/A 3.6 ppb (3) N/A N/A 1.0 ppb (1) N/A 0.14 ppb (2) 20.0 μg/m3 (18) 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 1 p.m. N/A N/A 3.8 ppb (4) N/A N/A 1.0 ppb (1) 36.0 ppb (28) 0.17 ppb (2) 9.0 μg/m3 (8) 9.0 μg/m3 (38) 38.0
 
May 19, 2019, noon N/A N/A 3.9 ppb (4) N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.18 ppb (2) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
May 19, 2019, 11 a.m. N/A N/A 3.8 ppb (4) N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.18 ppb (2) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
May 19, 2019, 10 a.m. N/A N/A 3.7 ppb (3) N/A N/A 1.0 ppb (1) 27.0 ppb (21) 0.17 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 9 a.m. N/A N/A 3.5 ppb (3) N/A N/A 1.0 ppb (1) 25.0 ppb (19) 0.16 ppb (2) 10.0 μg/m3 (9) 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 8 a.m. N/A N/A 3.6 ppb (3) N/A N/A 1.0 ppb (1) 26.0 ppb (20) 0.13 ppb (1) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 7 a.m. N/A N/A 4.5 ppb (4) N/A N/A 1.0 ppb (1) 24.0 ppb (18) 0.16 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 6 a.m. N/A N/A 4.1 ppb (4) N/A N/A 1.0 ppb (1) 29.0 ppb (22) 0.17 ppb (2) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 22.0
 
May 19, 2019, 5 a.m. N/A N/A 4.2 ppb (4) N/A N/A 1.0 ppb (1) 31.0 ppb (24) 0.16 ppb (2) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 24.0
 
May 19, 2019, 4 a.m. N/A N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) 30.0 ppb (23) 0.17 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 23.0
 
May 19, 2019, 3 a.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 30.0 ppb (23) 0.15 ppb (2) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 23.0
 
May 19, 2019, 2 a.m. N/A N/A 2.3 ppb (2) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.11 ppb (1) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 25.0
 
May 19, 2019, 1 a.m. N/A N/A 2.2 ppb (2) N/A N/A 1.0 ppb (1) 34.0 ppb (26) 0.15 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 26.0
 
May 19, 2019, midnight N/A N/A 2.1 ppb (2) N/A N/A 1.0 ppb (1) 36.0 ppb (28) 0.14 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 28.0
 
May 18, 2019, 11 p.m. N/A N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 28.0
 
May 18, 2019, 10 p.m. N/A N/A 1.8 ppb (2) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 31.0
 
May 18, 2019, 9 p.m. N/A N/A 1.8 ppb (2) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 32.0
 
May 18, 2019, 8 p.m. N/A N/A 1.7 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 32.0
 
May 18, 2019, 7 p.m. N/A N/A 1.7 ppb (2) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 31.0
 
May 18, 2019, 6 p.m. N/A N/A 1.6 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 32.0