AQSQID: 440071010

Site Name: E Providence

Location: Rumford (Rumford), RI

Reporting: True, Located: True

Current AQI: 34.0

Rumford (Rumford) RI, US: 41.840302, -71.361702

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 30, 2020, 1 p.m. 4.1 ppb (4) 0.8 ppb (1) 3.4 ppb (3) 3.0 ppb (3) 2.8 ppb (3) N/A 44.0 ppb (34) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 34.0
 
March 30, 2020, noon 3.6 ppb (3) 0.6 ppb (1) 3.0 ppb (3) 3.0 ppb (3) 2.3 ppb (2) N/A 44.0 ppb (34) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 34.0
 
March 30, 2020, 11 a.m. 5.1 ppb (5) 1.3 ppb (1) 3.9 ppb (4) 4.0 ppb (4) 2.7 ppb (3) N/A 42.0 ppb (32) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
March 30, 2020, 10 a.m. 4.0 ppb (4) 0.4 ppb (0) 3.4 ppb (3) 4.0 ppb (4) 3.1 ppb (3) N/A 41.0 ppb (32) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
March 30, 2020, 9 a.m. 2.6 ppb (2) 0.1 ppb (0) 2.3 ppb (2) 2.0 ppb (2) 2.1 ppb (2) N/A 42.0 ppb (32) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
March 30, 2020, 8 a.m. 2.4 ppb (2) 0.2 ppb (0) 2.2 ppb (2) 2.0 ppb (2) 2.0 ppb (2) N/A 42.0 ppb (32) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
March 30, 2020, 7 a.m. 1.8 ppb (2) 0.3 ppb (0) 1.5 ppb (1) 2.0 ppb (2) 1.2 ppb (1) N/A 44.0 ppb (34) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 34.0
 
March 30, 2020, 6 a.m. N/A N/A 1.5 ppb (1) N/A 1.1 ppb (1) N/A 44.0 ppb (34) N/A N/A -2.0 μg/m3 (0) 34.0
 
March 30, 2020, 5 a.m. N/A N/A 1.4 ppb (1) N/A 1.0 ppb (1) N/A 45.0 ppb (35) N/A N/A -1.0 μg/m3 (0) 35.0
 
March 30, 2020, 3 a.m. 2.3 ppb (2) 0.3 ppb (0) 1.9 ppb (2) 2.0 ppb (2) 1.7 ppb (2) N/A 44.0 ppb (34) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 34.0
 
March 30, 2020, 2 a.m. 2.9 ppb (3) 0.3 ppb (0) 2.4 ppb (2) 3.0 ppb (3) 2.1 ppb (2) N/A 43.0 ppb (33) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 33.0
 
March 30, 2020, 1 a.m. 3.2 ppb (3) 0.2 ppb (0) 2.7 ppb (3) 3.0 ppb (3) 2.4 ppb (2) N/A N/A 0.16 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 30, 2020, midnight 2.5 ppb (2) 0.0 ppb (0) 22.4 ppb (21) 0.0 ppb (0) 87.4 ppb (86) N/A 0.0 ppb (0) 5.47 ppb (60) N/A 0.0 μg/m3 (0) 86.0
 
March 29, 2020, 11 p.m. 2.1 ppb (2) -0.2 ppb (0) 22.5 ppb (21) 1.0 ppb (1) 87.7 ppb (86) N/A 0.0 ppb (0) 5.48 ppb (60) N/A 0.0 μg/m3 (0) 86.0
 
March 29, 2020, 10 p.m. 2.0 ppb (2) 1.3 ppb (1) 22.4 ppb (21) 3.0 ppb (3) 87.9 ppb (86) N/A 0.0 ppb (0) 5.71 ppb (62) N/A 1.0 μg/m3 (4) 86.0
 
March 29, 2020, 9 p.m. 1.6 ppb (1) 3.0 ppb (3) 22.5 ppb (21) 4.0 ppb (4) 87.9 ppb (86) N/A N/A 6.16 ppb (67) N/A 3.0 μg/m3 (12) 86.0
 
March 29, 2020, 8 p.m. 1.8 ppb (2) 0.1 ppb (0) 1.4 ppb (1) 2.0 ppb (2) 1.3 ppb (1) N/A 44.0 ppb (34) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 34.0
 
March 29, 2020, 7 p.m. 2.0 ppb (2) 0.2 ppb (0) 1.7 ppb (2) 2.0 ppb (2) 1.5 ppb (1) N/A 44.0 ppb (34) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 34.0
 
March 29, 2020, 6 p.m. 2.1 ppb (2) 0.2 ppb (0) 2.0 ppb (2) 2.0 ppb (2) 1.7 ppb (2) N/A 45.0 ppb (35) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 29, 2020, 5 p.m. 1.5 ppb (1) 0.1 ppb (0) 1.2 ppb (1) 1.0 ppb (1) 1.0 ppb (1) N/A 47.0 ppb (36) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 36.0
 
March 29, 2020, 4 p.m. 1.8 ppb (2) 0.1 ppb (0) 1.5 ppb (1) 2.0 ppb (2) 1.3 ppb (1) N/A 47.0 ppb (36) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 36.0
 
March 29, 2020, 3 p.m. 1.7 ppb (2) 0.1 ppb (0) 1.4 ppb (1) 2.0 ppb (2) 1.2 ppb (1) N/A 48.0 ppb (37) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
March 29, 2020, 2 p.m. 1.8 ppb (2) 0.2 ppb (0) 1.4 ppb (1) 2.0 ppb (2) 1.2 ppb (1) N/A 48.0 ppb (37) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 37.0
 
March 29, 2020, 1 p.m. 2.3 ppb (2) 0.3 ppb (0) 1.7 ppb (2) 2.0 ppb (2) 1.4 ppb (1) N/A 46.0 ppb (35) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
March 29, 2020, noon 1.8 ppb (2) 0.2 ppb (0) 1.4 ppb (1) 2.0 ppb (2) 1.3 ppb (1) N/A 46.0 ppb (35) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
March 29, 2020, 11 a.m. 2.4 ppb (2) 0.3 ppb (0) 2.1 ppb (2) 2.0 ppb (2) 1.7 ppb (2) N/A 45.0 ppb (35) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
March 29, 2020, 10 a.m. 1.9 ppb (2) 0.1 ppb (0) 1.6 ppb (1) 2.0 ppb (2) 1.4 ppb (1) N/A 44.0 ppb (34) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 34.0
 
March 29, 2020, 9 a.m. 1.6 ppb (1) 0.1 ppb (0) 1.3 ppb (1) 1.0 ppb (1) 1.1 ppb (1) N/A 45.0 ppb (35) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 29, 2020, 8 a.m. 1.6 ppb (1) 0.2 ppb (0) 1.4 ppb (1) 1.0 ppb (1) 1.1 ppb (1) N/A 45.0 ppb (35) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 35.0
 
March 29, 2020, 7 a.m. 1.8 ppb (2) 0.1 ppb (0) 1.5 ppb (1) 2.0 ppb (2) 1.4 ppb (1) N/A 44.0 ppb (34) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 34.0
 
March 29, 2020, 6 a.m. 1.6 ppb (1) 0.0 ppb (0) 1.4 ppb (1) 2.0 ppb (2) 1.3 ppb (1) N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 29, 2020, 5 a.m. 2.6 ppb (2) 2.7 ppb (3) 23.6 ppb (22) 2.0 ppb (2) 92.6 ppb (91) N/A 0.0 ppb (0) 6.53 ppb (70) N/A 3.0 μg/m3 (12) 91.0
 
March 29, 2020, 3 a.m. 2.6 ppb (2) 0.2 ppb (0) 2.5 ppb (2) 3.0 ppb (3) 2.2 ppb (2) N/A 34.0 ppb (26) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 26.0
 
March 29, 2020, 2 a.m. 3.2 ppb (3) 0.2 ppb (0) 2.8 ppb (3) 3.0 ppb (3) 2.5 ppb (2) N/A 36.0 ppb (28) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
March 29, 2020, 1 a.m. 3.4 ppb (3) 0.2 ppb (0) 2.9 ppb (3) 3.0 ppb (3) 2.7 ppb (3) N/A 35.0 ppb (27) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 29, 2020, midnight 5.7 ppb (5) 0.2 ppb (0) 5.4 ppb (5) 6.0 ppb (6) 5.1 ppb (5) N/A 31.0 ppb (24) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 28, 2020, 11 p.m. 6.9 ppb (6) 0.1 ppb (0) 6.3 ppb (6) 7.0 ppb (6) 6.2 ppb (6) N/A 32.0 ppb (25) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 28, 2020, 10 p.m. 6.0 ppb (6) 0.2 ppb (0) 5.4 ppb (5) 6.0 ppb (6) 5.2 ppb (5) N/A 36.0 ppb (28) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 28.0
 
March 28, 2020, 9 p.m. 3.6 ppb (3) 0.2 ppb (0) 3.5 ppb (3) 4.0 ppb (4) 3.3 ppb (3) N/A 40.0 ppb (31) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
March 28, 2020, 8 p.m. 2.8 ppb (3) 0.2 ppb (0) 2.6 ppb (2) 3.0 ppb (3) 2.3 ppb (2) N/A 42.0 ppb (32) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
March 28, 2020, 7 p.m. 2.3 ppb (2) 0.2 ppb (0) 2.1 ppb (2) 2.0 ppb (2) 1.8 ppb (2) N/A 43.0 ppb (33) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 33.0
 
March 28, 2020, 6 p.m. 2.0 ppb (2) 0.3 ppb (0) 1.9 ppb (2) 2.0 ppb (2) 1.6 ppb (1) N/A 45.0 ppb (35) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 35.0
 
March 28, 2020, 5 p.m. 2.7 ppb (3) 0.4 ppb (0) 2.5 ppb (2) 2.0 ppb (2) 2.1 ppb (2) N/A 45.0 ppb (35) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
March 28, 2020, 4 p.m. 7.1 ppb (7) 1.2 ppb (1) 6.8 ppb (6) 6.0 ppb (6) 5.6 ppb (5) N/A 40.0 ppb (31) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 31.0
 
March 28, 2020, 3 p.m. 5.4 ppb (5) 1.2 ppb (1) 5.2 ppb (5) 4.0 ppb (4) 4.0 ppb (4) N/A 40.0 ppb (31) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
March 28, 2020, 2 p.m. 3.4 ppb (3) 0.6 ppb (1) 3.2 ppb (3) 3.0 ppb (3) 2.6 ppb (2) N/A 41.0 ppb (32) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
March 28, 2020, 1 p.m. 6.2 ppb (6) 1.4 ppb (1) 5.7 ppb (5) 5.0 ppb (5) 4.3 ppb (4) N/A 36.0 ppb (28) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 28, 2020, noon 35.4 ppb (33) 14.6 ppb (14) 32.4 ppb (30) 21.0 ppb (19) 19.3 ppb (18) N/A 17.0 ppb (13) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 28, 2020, 11 a.m. 55.6 ppb (52) 28.9 ppb (27) 55.6 ppb (52) 27.0 ppb (25) 27.9 ppb (26) N/A 4.0 ppb (3) 0.51 ppb (6) N/A 10.0 μg/m3 (42) 52.0
 
March 28, 2020, 10 a.m. 36.5 ppb (34) 9.8 ppb (9) 32.2 ppb (30) 27.0 ppb (25) 25.8 ppb (24) N/A 2.0 ppb (2) 0.42 ppb (5) N/A 6.0 μg/m3 (25) 34.0
 
March 28, 2020, 9 a.m. 35.3 ppb (33) 8.9 ppb (8) 28.2 ppb (26) 26.0 ppb (24) 23.6 ppb (22) N/A 1.0 ppb (1) 0.44 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 28, 2020, 8 a.m. 33.8 ppb (31) 6.4 ppb (6) 25.7 ppb (24) 27.0 ppb (25) 24.2 ppb (22) N/A 3.0 ppb (2) 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 28, 2020, 7 a.m. 26.8 ppb (25) 2.0 ppb (2) 27.1 ppb (25) 25.0 ppb (23) 23.6 ppb (22) N/A 4.0 ppb (3) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 28, 2020, 6 a.m. 22.7 ppb (21) 1.3 ppb (1) 29.5 ppb (27) 22.0 ppb (20) 24.2 ppb (22) N/A 9.0 ppb (7) 0.34 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 28, 2020, 5 a.m. 13.8 ppb (13) 0.3 ppb (0) 12.5 ppb (12) 13.0 ppb (12) 11.8 ppb (11) N/A 22.0 ppb (17) 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 28, 2020, 3 a.m. 12.2 ppb (11) 0.4 ppb (0) 11.7 ppb (11) 12.0 ppb (11) 9.5 ppb (9) N/A 27.0 ppb (21) 0.32 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
March 28, 2020, 2 a.m. 13.1 ppb (12) 0.7 ppb (1) 11.7 ppb (11) 12.0 ppb (11) 10.9 ppb (10) N/A 30.0 ppb (23) 0.32 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
March 28, 2020, 1 a.m. 6.7 ppb (6) 0.1 ppb (0) 7.5 ppb (7) 7.0 ppb (6) 6.9 ppb (6) N/A 38.0 ppb (29) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 28, 2020, midnight 8.0 ppb (7) 9.1 ppb (8) 23.8 ppb (22) 4.0 ppb (4) 97.9 ppb (97) N/A 0.0 ppb (0) 12.57 ppb (151) N/A 9.0 μg/m3 (38) 151.0
 
March 27, 2020, 11 p.m. 3.6 ppb (3) 3.1 ppb (3) 23.8 ppb (22) 2.0 ppb (2) 94.4 ppb (93) N/A N/A N/A N/A 3.0 μg/m3 (12) 93.0
 
March 27, 2020, 10 p.m. 1.5 ppb (1) 0.1 ppb (0) 1.4 ppb (1) 1.0 ppb (1) 1.2 ppb (1) N/A 48.0 ppb (37) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 37.0
 
March 27, 2020, 9 p.m. 1.4 ppb (1) 0.2 ppb (0) 1.2 ppb (1) 1.0 ppb (1) 1.0 ppb (1) N/A 49.0 ppb (38) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 38.0
 
March 27, 2020, 8 p.m. 1.4 ppb (1) 0.2 ppb (0) 1.3 ppb (1) 1.0 ppb (1) 1.1 ppb (1) N/A 49.0 ppb (38) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 38.0
 
March 27, 2020, 7 p.m. 1.6 ppb (1) 0.3 ppb (0) 1.5 ppb (1) 1.0 ppb (1) 1.2 ppb (1) N/A 49.0 ppb (38) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
March 27, 2020, 6 p.m. 1.5 ppb (1) 0.3 ppb (0) 1.4 ppb (1) 1.0 ppb (1) 1.1 ppb (1) N/A 49.0 ppb (38) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 38.0
 
March 27, 2020, 5 p.m. 1.6 ppb (1) 0.3 ppb (0) 1.5 ppb (1) 1.0 ppb (1) 1.2 ppb (1) N/A 49.0 ppb (38) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 38.0
 
March 27, 2020, 4 p.m. 1.6 ppb (1) 0.3 ppb (0) 1.5 ppb (1) 1.0 ppb (1) 1.3 ppb (1) N/A 48.0 ppb (37) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 37.0
 
March 27, 2020, 3 p.m. 1.8 ppb (2) 0.3 ppb (0) 1.6 ppb (1) 2.0 ppb (2) 1.3 ppb (1) N/A 47.0 ppb (36) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 36.0
 
March 27, 2020, 2 p.m. 2.9 ppb (3) 0.5 ppb (0) 2.6 ppb (2) 2.0 ppb (2) 2.1 ppb (2) N/A 42.0 ppb (32) 0.18 ppb (2) N/A -1.0 μg/m3 (0) 32.0
 
March 27, 2020, 1 p.m. 6.0 ppb (6) 1.1 ppb (1) 5.9 ppb (5) 5.0 ppb (5) 4.8 ppb (4) N/A 34.0 ppb (26) 0.22 ppb (2) N/A -1.0 μg/m3 (0) 26.0
 
March 27, 2020, noon 14.3 ppb (13) 1.9 ppb (2) 13.8 ppb (13) 12.0 ppb (11) 11.9 ppb (11) N/A 25.0 ppb (19) 0.29 ppb (3) N/A -1.0 μg/m3 (0) 19.0
 
March 27, 2020, 11 a.m. 16.8 ppb (16) 1.0 ppb (1) 16.4 ppb (15) 16.0 ppb (15) 15.3 ppb (14) N/A 22.0 ppb (17) 0.3 ppb (3) N/A 2.0 μg/m3 (8) 17.0
 
March 27, 2020, 10 a.m. 9.1 ppb (8) 0.1 ppb (0) 9.2 ppb (9) 9.0 ppb (8) 9.0 ppb (8) N/A 30.0 ppb (23) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 23.0
 
March 27, 2020, 9 a.m. 8.8 ppb (8) 0.1 ppb (0) 8.6 ppb (8) 9.0 ppb (8) 8.5 ppb (8) N/A N/A 0.23 ppb (3) N/A 0.0 μg/m3 (0) 8.0
 
March 27, 2020, 8 a.m. 8.1 ppb (8) 1.7 ppb (2) 23.6 ppb (22) 1.0 ppb (1) 95.9 ppb (95) N/A N/A 8.55 ppb (90) N/A 2.0 μg/m3 (8) 95.0
 
March 27, 2020, 7 a.m. N/A 0.9 ppb (1) 23.5 ppb (22) 0.0 ppb (0) 95.7 ppb (94) N/A N/A 7.69 ppb (82) N/A 1.0 μg/m3 (4) 94.0
 
March 27, 2020, 6 a.m. N/A -0.3 ppb (0) 23.7 ppb (22) 0.0 ppb (0) 95.5 ppb (94) N/A N/A 7.44 ppb (79) N/A 0.0 μg/m3 (0) 94.0
 
March 27, 2020, 5 a.m. N/A -0.1 ppb (0) 24.2 ppb (22) -1.0 ppb (0) 94.7 ppb (93) N/A N/A 7.59 ppb (81) N/A 0.0 μg/m3 (0) 93.0
 
March 27, 2020, 3 a.m. 9.9 ppb (9) 0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.24 ppb (3) N/A -2.0 μg/m3 (0) 9.0
 
March 27, 2020, 2 a.m. 5.6 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 6.0
 
March 27, 2020, 1 a.m. 4.7 ppb (4) 0.1 ppb (0) 4.4 ppb (4) 5.0 ppb (5) 4.3 ppb (4) N/A N/A 0.2 ppb (2) N/A 1.0 μg/m3 (4) 5.0
 
March 27, 2020, midnight 4.1 ppb (4) 1.2 ppb (1) 22.7 ppb (21) 0.0 ppb (0) 92.7 ppb (91) N/A N/A 6.99 ppb (75) N/A 1.0 μg/m3 (4) 91.0
 
March 26, 2020, 11 p.m. 4.5 ppb (4) 0.2 ppb (0) 23.4 ppb (22) N/A 93.0 ppb (91) N/A N/A 8.46 ppb (90) N/A 0.0 μg/m3 (0) 91.0
 
March 26, 2020, 10 p.m. N/A -2.6 ppb (0) 23.1 ppb (21) N/A 91.2 ppb (90) N/A N/A 11.17 ppb (128) N/A -3.0 μg/m3 (0) 128.0
 
March 26, 2020, 9 p.m. N/A -2.8 ppb (0) 23.0 ppb (21) N/A 90.6 ppb (89) N/A N/A 14.97 ppb (191) N/A -3.0 μg/m3 (0) 191.0
 
March 26, 2020, 8 p.m. N/A N/A 2.9 ppb (3) N/A 2.4 ppb (2) N/A N/A 5.52 ppb (60) N/A N/A 60.0
 
March 26, 2020, 7 p.m. 51.0 ppb (47) 48.5 ppb (45) 2.8 ppb (3) 3.0 ppb (3) 2.2 ppb (2) N/A N/A 2.04 ppb (23) N/A 4.0 μg/m3 (17) 47.0
 
March 26, 2020, 6 p.m. N/A N/A 2.5 ppb (2) N/A 1.9 ppb (2) N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 5 p.m. N/A N/A 2.6 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 26, 2020, 4 p.m. 4.6 ppb (4) 0.8 ppb (1) 3.1 ppb (3) 4.0 ppb (4) 2.3 ppb (2) N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 26, 2020, 3 p.m. 4.6 ppb (4) 0.7 ppb (1) 3.4 ppb (3) 4.0 ppb (4) 2.4 ppb (2) N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 2 p.m. 7.0 ppb (6) 2.1 ppb (2) 3.6 ppb (3) 5.0 ppb (5) 2.6 ppb (2) N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 1 p.m. 8.0 ppb (7) 5.3 ppb (5) 23.9 ppb (22) 8.0 ppb (7) 92.2 ppb (91) N/A N/A 3.96 ppb (44) N/A 5.0 μg/m3 (21) 91.0
 
March 26, 2020, noon 8.7 ppb (8) 1.6 ppb (1) 5.6 ppb (5) 7.0 ppb (6) 4.6 ppb (4) N/A N/A 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 26, 2020, 11 a.m. 9.5 ppb (9) 1.5 ppb (1) 7.2 ppb (7) 8.0 ppb (7) 6.3 ppb (6) N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 26, 2020, 10 a.m. 8.3 ppb (8) 2.9 ppb (3) 23.6 ppb (22) 4.0 ppb (4) 91.0 ppb (89) N/A N/A 1.08 ppb (12) N/A 3.0 μg/m3 (12) 89.0
 
March 26, 2020, 9 a.m. 8.5 ppb (8) 3.9 ppb (4) 23.8 ppb (22) 6.0 ppb (6) 91.7 ppb (90) N/A N/A 1.26 ppb (14) N/A 4.0 μg/m3 (17) 90.0
 
March 26, 2020, 8 a.m. 8.0 ppb (7) 1.7 ppb (2) 5.0 ppb (5) 6.0 ppb (6) 4.9 ppb (5) N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 26, 2020, 7 a.m. 8.1 ppb (8) 1.7 ppb (2) 5.0 ppb (5) 6.0 ppb (6) 4.8 ppb (4) N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 26, 2020, 6 a.m. 7.5 ppb (7) 1.9 ppb (2) 4.4 ppb (4) 6.0 ppb (6) 4.2 ppb (4) N/A N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 26, 2020, 5 a.m. 6.0 ppb (6) 10.3 ppb (10) 24.2 ppb (22) 6.0 ppb (6) 90.9 ppb (89) N/A N/A 3.21 ppb (36) N/A 10.0 μg/m3 (42) 89.0
 
March 26, 2020, 3 a.m. 6.5 ppb (6) 2.1 ppb (2) 2.2 ppb (2) 4.0 ppb (4) 1.9 ppb (2) N/A N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 26, 2020, 2 a.m. 6.8 ppb (6) 2.2 ppb (2) 2.2 ppb (2) 5.0 ppb (5) 1.9 ppb (2) N/A N/A 0.18 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 26, 2020, 1 a.m. 8.0 ppb (7) 2.5 ppb (2) 2.9 ppb (3) 5.0 ppb (5) 2.5 ppb (2) N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 26, 2020, midnight 7.5 ppb (7) 6.0 ppb (6) 24.3 ppb (23) 6.0 ppb (6) 93.1 ppb (92) N/A N/A 4.16 ppb (46) N/A 6.0 μg/m3 (25) 92.0
 
March 25, 2020, 11 p.m. 7.6 ppb (7) 5.5 ppb (5) 24.3 ppb (23) 4.0 ppb (4) 92.8 ppb (91) N/A N/A 4.35 ppb (48) N/A 6.0 μg/m3 (25) 91.0
 
March 25, 2020, 10 p.m. 6.8 ppb (6) 3.6 ppb (3) 23.9 ppb (22) 3.0 ppb (3) 92.6 ppb (91) N/A N/A 5.33 ppb (58) N/A 4.0 μg/m3 (17) 91.0
 
March 25, 2020, 9 p.m. 3.3 ppb (3) 3.4 ppb (3) 23.3 ppb (22) 5.0 ppb (5) 97.4 ppb (96) N/A N/A 6.23 ppb (67) N/A 3.0 μg/m3 (12) 96.0
 
March 25, 2020, 8 p.m. 3.0 ppb (3) 0.7 ppb (1) 1.3 ppb (1) 2.0 ppb (2) 1.1 ppb (1) N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 7 p.m. 3.2 ppb (3) 0.7 ppb (1) 1.5 ppb (1) 3.0 ppb (3) 1.2 ppb (1) N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 6 p.m. 3.4 ppb (3) 0.5 ppb (0) 2.0 ppb (2) 3.0 ppb (3) 1.5 ppb (1) N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2020, 5 p.m. 4.1 ppb (4) 0.4 ppb (0) 2.9 ppb (3) 4.0 ppb (4) 2.4 ppb (2) N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 4 p.m. 3.5 ppb (3) 0.4 ppb (0) 2.5 ppb (2) 3.0 ppb (3) 2.0 ppb (2) N/A N/A 0.18 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 25, 2020, 3 p.m. 4.2 ppb (4) 0.4 ppb (0) 3.1 ppb (3) 4.0 ppb (4) 2.5 ppb (2) N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 25, 2020, 2 p.m. 4.3 ppb (4) 0.3 ppb (0) 3.3 ppb (3) 4.0 ppb (4) 2.8 ppb (3) N/A N/A 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2020, 1 p.m. 3.9 ppb (4) 0.3 ppb (0) 3.1 ppb (3) 4.0 ppb (4) 2.5 ppb (2) N/A N/A 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 25, 2020, noon 4.1 ppb (4) 0.3 ppb (0) 3.1 ppb (3) 4.0 ppb (4) 2.7 ppb (3) N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 11 a.m. 4.9 ppb (5) 0.3 ppb (0) 3.8 ppb (4) 5.0 ppb (5) 3.5 ppb (3) N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2020, 10 a.m. 6.1 ppb (6) 0.4 ppb (0) 4.5 ppb (4) 6.0 ppb (6) 4.2 ppb (4) N/A N/A 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2020, 9 a.m. 10.1 ppb (9) 0.3 ppb (0) 9.2 ppb (9) 10.0 ppb (9) 8.6 ppb (8) N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 25, 2020, 8 a.m. 9.8 ppb (9) 0.4 ppb (0) 10.9 ppb (10) 10.0 ppb (9) 10.3 ppb (10) N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 7 a.m. 8.3 ppb (8) 4.1 ppb (4) 23.3 ppb (22) 7.0 ppb (6) 89.6 ppb (88) N/A N/A 3.53 ppb (39) N/A 4.0 μg/m3 (17) 88.0
 
March 25, 2020, 6 a.m. 5.8 ppb (5) 6.8 ppb (6) 23.7 ppb (22) 7.0 ppb (6) 93.0 ppb (91) N/A N/A 3.59 ppb (40) N/A 7.0 μg/m3 (29) 91.0
 
March 25, 2020, 5 a.m. 5.0 ppb (5) 6.5 ppb (6) 23.4 ppb (22) 5.0 ppb (5) 88.2 ppb (86) N/A N/A 3.56 ppb (40) N/A 7.0 μg/m3 (29) 86.0
 
March 25, 2020, 3 a.m. 6.5 ppb (6) 0.1 ppb (0) 7.3 ppb (7) 6.0 ppb (6) 7.1 ppb (7) N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 2 a.m. 5.7 ppb (5) 0.1 ppb (0) 6.0 ppb (6) 6.0 ppb (6) 5.8 ppb (5) N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 25, 2020, 1 a.m. 6.3 ppb (6) 0.1 ppb (0) 6.1 ppb (6) 6.0 ppb (6) 5.9 ppb (5) N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, midnight 4.3 ppb (4) 4.8 ppb (4) 23.6 ppb (22) 6.0 ppb (6) 95.2 ppb (94) N/A N/A 6.49 ppb (70) N/A 5.0 μg/m3 (21) 94.0
 
March 24, 2020, 11 p.m. 3.7 ppb (3) 6.0 ppb (6) 23.9 ppb (22) 5.0 ppb (5) 96.9 ppb (96) N/A N/A 7.52 ppb (80) N/A 6.0 μg/m3 (25) 96.0
 
March 24, 2020, 10 p.m. 2.4 ppb (2) 4.8 ppb (4) 24.0 ppb (22) 3.0 ppb (3) 99.8 ppb (99) N/A N/A 9.25 ppb (98) N/A 5.0 μg/m3 (21) 99.0
 
March 24, 2020, 9 p.m. 2.7 ppb (3) 3.1 ppb (3) 24.0 ppb (22) 5.0 ppb (5) 100.5 ppb (99) N/A N/A 9.65 ppb (102) N/A 3.0 μg/m3 (12) 102.0
 
March 24, 2020, 8 p.m. 2.9 ppb (3) 0.0 ppb (0) 2.7 ppb (3) 3.0 ppb (3) 2.4 ppb (2) N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2020, 7 p.m. 2.2 ppb (2) 0.0 ppb (0) 2.1 ppb (2) 2.0 ppb (2) 1.8 ppb (2) N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2020, 6 p.m. 1.8 ppb (2) 0.0 ppb (0) 1.7 ppb (2) 2.0 ppb (2) 1.4 ppb (1) N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2020, 5 p.m. 1.9 ppb (2) 0.1 ppb (0) 1.8 ppb (2) 2.0 ppb (2) 1.4 ppb (1) N/A N/A 0.16 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 24, 2020, 4 p.m. 2.3 ppb (2) 0.1 ppb (0) 2.3 ppb (2) 2.0 ppb (2) 1.8 ppb (2) N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2020, 3 p.m. 2.8 ppb (3) 0.1 ppb (0) 2.9 ppb (3) 3.0 ppb (3) 2.1 ppb (2) N/A N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2020, 2 p.m. 2.8 ppb (3) 0.1 ppb (0) 2.7 ppb (3) 3.0 ppb (3) 1.9 ppb (2) N/A N/A 0.17 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 24, 2020, 1 p.m. 3.6 ppb (3) 0.1 ppb (0) 3.4 ppb (3) 4.0 ppb (4) 2.4 ppb (2) N/A N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2020, noon 3.9 ppb (4) 0.1 ppb (0) 3.7 ppb (3) 4.0 ppb (4) 3.1 ppb (3) N/A N/A 0.18 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 24, 2020, 11 a.m. 3.8 ppb (4) 0.1 ppb (0) 3.8 ppb (4) 4.0 ppb (4) 3.5 ppb (3) N/A N/A 0.19 ppb (2) N/A 0.0 μg/m3 (0) 4.0
 
March 24, 2020, 10 a.m. 3.4 ppb (3) 0.0 ppb (0) 3.5 ppb (3) 3.0 ppb (3) 3.2 ppb (3) N/A N/A 0.17 ppb (2) N/A N/A 3.0
 
March 24, 2020, 9 a.m. 2.8 ppb (3) 0.0 ppb (0) 2.5 ppb (2) 3.0 ppb (3) 2.3 ppb (2) N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2020, 8 a.m. 2.7 ppb (3) 0.1 ppb (0) 2.2 ppb (2) 3.0 ppb (3) 2.0 ppb (2) N/A N/A 0.17 ppb (2) N/A N/A 3.0
 
March 24, 2020, 7 a.m. 2.8 ppb (3) 0.0 ppb (0) 2.3 ppb (2) 3.0 ppb (3) 2.1 ppb (2) N/A N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2020, 6 a.m. 3.0 ppb (3) 7.5 ppb (7) 23.8 ppb (22) 6.0 ppb (6) 94.7 ppb (93) N/A N/A 2.58 ppb (29) N/A 8.0 μg/m3 (33) 93.0
 
March 24, 2020, 5 a.m. 3.2 ppb (3) 6.3 ppb (6) 23.4 ppb (22) 5.0 ppb (5) 91.6 ppb (90) N/A N/A 3.16 ppb (35) N/A 6.0 μg/m3 (25) 90.0
 
March 24, 2020, 3 a.m. N/A N/A 3.8 ppb (4) N/A 3.6 ppb (3) N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2020, 1 a.m. N/A N/A 4.1 ppb (4) N/A 3.9 ppb (4) N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2020, midnight N/A 6.6 ppb (6) 22.4 ppb (21) 7.0 ppb (6) 87.4 ppb (86) N/A N/A 4.67 ppb (52) N/A 7.0 μg/m3 (29) 86.0
 
March 23, 2020, 11 p.m. N/A 7.3 ppb (7) 23.4 ppb (22) 8.0 ppb (7) 90.0 ppb (88) N/A N/A 2.9 ppb (32) N/A 7.0 μg/m3 (29) 88.0
 
March 23, 2020, 10 p.m. N/A 7.8 ppb (7) 23.4 ppb (22) 12.0 ppb (11) 90.0 ppb (88) N/A N/A 2.1 ppb (23) N/A 8.0 μg/m3 (33) 88.0
 
March 23, 2020, 9 p.m. N/A 12.3 ppb (11) 23.3 ppb (22) 6.0 ppb (6) 90.1 ppb (88) N/A N/A 1.51 ppb (17) N/A 12.0 μg/m3 (50) 88.0
 
March 23, 2020, 8 p.m. 4.9 ppb (5) 0.2 ppb (0) 4.4 ppb (4) 5.0 ppb (5) 4.0 ppb (4) N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2020, 7 p.m. N/A N/A 3.6 ppb (3) N/A 3.2 ppb (3) N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2020, 6 p.m. N/A N/A 2.8 ppb (3) N/A 2.3 ppb (2) N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2020, 5 p.m. 2.2 ppb (2) 0.3 ppb (0) 2.5 ppb (2) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2020, 4 p.m. 2.3 ppb (2) 0.5 ppb (0) 2.2 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2020, 3 p.m. 3.0 ppb (3) 0.5 ppb (0) 2.7 ppb (3) 3.0 ppb (3) 2.1 ppb (2) 0.0 ppb (0) N/A 0.16 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 23, 2020, 2 p.m. 4.3 ppb (4) 0.9 ppb (1) 3.7 ppb (3) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2020, 1 p.m. 4.8 ppb (4) 0.9 ppb (1) 4.4 ppb (4) 4.0 ppb (4) 3.6 ppb (3) 0.0 ppb (0) N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2020, noon 4.7 ppb (4) 0.5 ppb (0) 4.7 ppb (4) 4.0 ppb (4) 3.9 ppb (4) 0.0 ppb (0) N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2020, 11 a.m. 4.8 ppb (4) 0.3 ppb (0) 4.5 ppb (4) 4.0 ppb (4) 4.0 ppb (4) 0.0 ppb (0) N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2020, 10 a.m. 5.4 ppb (5) 0.3 ppb (0) 5.3 ppb (5) 5.0 ppb (5) 4.8 ppb (4) 0.0 ppb (0) N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2020, 9 a.m. 5.7 ppb (5) 0.5 ppb (0) 5.6 ppb (5) 5.0 ppb (5) 4.8 ppb (4) 0.0 ppb (0) N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2020, 8 a.m. 4.7 ppb (4) 0.3 ppb (0) 4.5 ppb (4) 4.0 ppb (4) 4.1 ppb (4) 0.0 ppb (0) N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2020, 7 a.m. 5.9 ppb (5) 0.2 ppb (0) 5.4 ppb (5) 6.0 ppb (6) 5.2 ppb (5) 0.0 ppb (0) N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0