ID: 739

AQSQID: 440071010

Site Name: E Providence

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

Updated: March 3, 2021, 11:32 p.m.

Location: Rumford (Rumford), RI

Reporting: True, Located: True

Current AQI: 42.0

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
Feb. 24, 2021, 10 p.m. 7.1 ppb (7) 0.2 ppb (1) 7.4 ppb (7) 7.0 ppb (7) 7.2 ppb (7) 0.0 ppb (0) 43.0 ppb (40) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 40.0
 
Feb. 24, 2021, 9 p.m. 5.2 ppb (5) 0.5 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (42) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 42.0
 
Feb. 24, 2021, 8 p.m. 5.8 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 43.0 ppb (40) 0.19 ppb (3) N/A N/A 40.0
 
Feb. 24, 2021, 7 p.m. 5.6 ppb (6) 1.1 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (41) 0.18 ppb (3) N/A 0.0 μg/m3 (0) 41.0
 
Feb. 24, 2021, 6 p.m. 6.6 ppb (7) 1.7 ppb (2) 8.1 ppb (8) 5.0 ppb (5) 5.0 ppb (5) 0.0 ppb (0) 42.0 ppb (39) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 39.0
 
Feb. 24, 2021, 5 p.m. 10.4 ppb (10) 2.9 ppb (3) 10.8 ppb (11) 8.0 ppb (8) 8.0 ppb (8) 0.0 ppb (0) 39.0 ppb (37) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 37.0
 
Feb. 24, 2021, 4 p.m. 3.1 ppb (3) 0.7 ppb (1) 3.4 ppb (4) 2.0 ppb (2) 2.6 ppb (3) 0.0 ppb (0) 42.0 ppb (39) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 39.0
 
Feb. 24, 2021, 3 p.m. 3.9 ppb (4) 0.9 ppb (1) 4.2 ppb (4) 3.0 ppb (3) 3.2 ppb (4) 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) N/A 6.0 μg/m3 (25) 38.0
 
Feb. 24, 2021, 2 p.m. 4.0 ppb (4) 1.0 ppb (1) 4.2 ppb (4) 3.0 ppb (3) 3.2 ppb (4) 0.0 ppb (0) 39.0 ppb (37) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 37.0
 
Feb. 24, 2021, 1 p.m. N/A N/A 15.9 ppb (15) N/A 11.6 ppb (11) N/A 31.0 ppb (29) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 24, 2021, noon N/A N/A 14.2 ppb (14) N/A 12.1 ppb (12) N/A 30.0 ppb (28) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 28.0
 
Feb. 24, 2021, 11 a.m. N/A N/A 23.5 ppb (23) N/A 22.5 ppb (22) N/A 19.0 ppb (18) 0.29 ppb (4) N/A 0.0 μg/m3 (0) 23.0
 
Feb. 24, 2021, 10 a.m. N/A N/A 19.8 ppb (19) N/A 18.6 ppb (18) N/A 22.0 ppb (21) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 21.0
 
Feb. 24, 2021, 9 a.m. N/A N/A 9.2 ppb (9) N/A 8.9 ppb (9) N/A 32.0 ppb (30) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
Feb. 24, 2021, 8 a.m. N/A N/A 5.0 ppb (5) N/A 4.9 ppb (5) N/A 36.0 ppb (34) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Feb. 24, 2021, 7 a.m. N/A N/A 4.8 ppb (5) N/A 4.8 ppb (5) N/A 36.0 ppb (34) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Feb. 24, 2021, 6 a.m. N/A N/A 4.2 ppb (4) N/A 4.1 ppb (4) N/A 38.0 ppb (36) 0.18 ppb (3) N/A 7.0 μg/m3 (30) 36.0
 
Feb. 24, 2021, 5 a.m. N/A N/A 4.4 ppb (5) N/A 4.3 ppb (5) N/A 39.0 ppb (37) 0.18 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 24, 2021, 4 a.m. N/A N/A 4.8 ppb (5) N/A 4.8 ppb (5) N/A 39.0 ppb (37) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 37.0
 
Feb. 24, 2021, 3 a.m. N/A N/A 6.6 ppb (7) N/A 6.5 ppb (7) N/A 37.0 ppb (35) 0.21 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 24, 2021, 2 a.m. N/A N/A 9.3 ppb (9) N/A 9.2 ppb (9) N/A 34.0 ppb (32) 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 24, 2021, 1 a.m. N/A N/A 12.0 ppb (12) N/A 11.9 ppb (12) N/A 32.0 ppb (30) 0.26 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Feb. 24, 2021, midnight N/A N/A 12.0 ppb (12) N/A 12.0 ppb (12) N/A 33.0 ppb (31) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 23, 2021, 11 p.m. N/A N/A 14.3 ppb (14) N/A 14.2 ppb (14) N/A 32.0 ppb (30) 0.26 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 23, 2021, 10 p.m. N/A N/A 16.6 ppb (16) N/A 16.1 ppb (16) N/A 33.0 ppb (31) 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 23, 2021, 9 p.m. N/A N/A 12.6 ppb (12) N/A 12.0 ppb (12) N/A 40.0 ppb (38) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 23, 2021, 8 p.m. N/A N/A 10.9 ppb (11) N/A 9.7 ppb (10) N/A 43.0 ppb (40) 0.22 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
Feb. 23, 2021, 7 p.m. N/A N/A 9.6 ppb (10) N/A 8.4 ppb (8) N/A 45.0 ppb (42) 0.21 ppb (3) N/A 9.0 μg/m3 (38) 42.0
 
Feb. 23, 2021, 6 p.m. N/A N/A 6.3 ppb (6) N/A 5.3 ppb (5) N/A 47.0 ppb (44) 0.2 ppb (3) N/A 8.0 μg/m3 (34) 44.0
 
Feb. 23, 2021, 5 p.m. N/A N/A 7.9 ppb (8) N/A 6.1 ppb (6) N/A 48.0 ppb (45) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 45.0
 
Feb. 23, 2021, 4 p.m. N/A N/A 8.6 ppb (9) N/A 6.5 ppb (7) N/A 45.0 ppb (42) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 42.0
 
Feb. 23, 2021, 3 p.m. N/A N/A 10.4 ppb (10) N/A 8.3 ppb (8) N/A 37.0 ppb (35) 0.26 ppb (4) N/A 7.0 μg/m3 (30) 35.0
 
Feb. 23, 2021, 2 p.m. N/A N/A 15.1 ppb (15) N/A 12.2 ppb (12) N/A 30.0 ppb (28) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 23, 2021, 1 p.m. N/A N/A 19.7 ppb (19) N/A 16.0 ppb (16) N/A 25.0 ppb (24) 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 23, 2021, noon N/A N/A 28.1 ppb (27) N/A 23.9 ppb (23) N/A 18.0 ppb (17) 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 23, 2021, 11 a.m. N/A N/A 16.8 ppb (16) N/A 16.0 ppb (16) N/A 26.0 ppb (25) 0.29 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 23, 2021, 10 a.m. N/A N/A 11.8 ppb (12) N/A 11.6 ppb (11) N/A 29.0 ppb (27) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
Feb. 23, 2021, 9 a.m. N/A N/A 8.2 ppb (8) N/A 8.1 ppb (8) N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 23, 2021, 8 a.m. N/A N/A 6.7 ppb (7) N/A 6.6 ppb (7) N/A 34.0 ppb (32) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
Feb. 23, 2021, 7 a.m. N/A N/A 7.2 ppb (7) N/A 7.1 ppb (7) N/A 34.0 ppb (32) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
Feb. 23, 2021, 6 a.m. N/A N/A 4.9 ppb (5) N/A 4.8 ppb (5) N/A 36.0 ppb (34) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Feb. 23, 2021, 5 a.m. N/A N/A 4.7 ppb (5) N/A 4.6 ppb (5) N/A 37.0 ppb (35) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 35.0
 
Feb. 23, 2021, 4 a.m. N/A N/A 5.4 ppb (6) N/A 5.4 ppb (6) N/A 37.0 ppb (35) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 35.0
 
Feb. 23, 2021, 3 a.m. N/A N/A 4.7 ppb (5) N/A 4.7 ppb (5) N/A 38.0 ppb (36) 0.2 ppb (3) N/A 2.0 μg/m3 (9) 36.0
 
Feb. 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 38.0
 
Feb. 23, 2021, 1 a.m. N/A N/A 10.1 ppb (10) N/A 9.9 ppb (10) N/A 36.0 ppb (34) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 34.0
 
Feb. 23, 2021, midnight N/A N/A 6.8 ppb (7) N/A 6.5 ppb (7) N/A 39.0 ppb (37) 0.09 ppb (2) N/A 2.0 μg/m3 (9) 37.0
 
Feb. 22, 2021, 11 p.m. N/A N/A 3.2 ppb (4) N/A 2.9 ppb (3) N/A 44.0 ppb (41) 0.73 ppb (8) N/A 2.0 μg/m3 (9) 41.0
 
Feb. 22, 2021, 10 p.m. N/A N/A 3.6 ppb (4) N/A 3.0 ppb (3) N/A 43.0 ppb (40) 2.14 ppb (24) N/A 0.0 μg/m3 (0) 40.0
 
Feb. 22, 2021, 9 p.m. N/A N/A 3.6 ppb (4) N/A 3.1 ppb (3) N/A 43.0 ppb (40) 3.4 ppb (39) N/A 0.0 μg/m3 (0) 40.0
 
Feb. 22, 2021, 8 p.m. N/A N/A 4.9 ppb (5) N/A 4.1 ppb (4) N/A 41.0 ppb (38) 5.63 ppb (62) N/A 2.0 μg/m3 (9) 62.0
 
Feb. 22, 2021, 7 p.m. N/A N/A 3.6 ppb (4) N/A 3.0 ppb (3) N/A 43.0 ppb (40) 6.51 ppb (71) N/A 5.0 μg/m3 (21) 71.0
 
Feb. 22, 2021, 6 p.m. 4.1 ppb (4) 0.6 ppb (1) 4.0 ppb (4) 4.0 ppb (4) 3.3 ppb (4) 0.0 ppb (0) 44.0 ppb (41) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 41.0
 
Feb. 22, 2021, 5 p.m. 3.9 ppb (4) 0.7 ppb (1) 3.7 ppb (4) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 43.0
 
Feb. 22, 2021, 4 p.m. 4.2 ppb (4) 0.8 ppb (1) 4.3 ppb (5) 4.0 ppb (4) 3.4 ppb (4) 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) N/A 9.0 μg/m3 (38) 43.0
 
Feb. 22, 2021, 3 p.m. 4.8 ppb (5) 0.8 ppb (1) 4.7 ppb (5) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 46.0 ppb (43) 0.19 ppb (3) N/A 19.0 μg/m3 (66) 66.0
 
Feb. 22, 2021, 2 p.m. 10.3 ppb (10) 1.8 ppb (2) 10.1 ppb (10) 9.0 ppb (9) 8.4 ppb (8) 0.0 ppb (0) 40.0 ppb (38) 0.22 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
Feb. 22, 2021, 1 p.m. N/A N/A 77.5 ppb (77) N/A 39.2 ppb (37) N/A 5.0 ppb (5) N/A N/A 18.0 μg/m3 (64) 77.0
 
Feb. 22, 2021, noon N/A N/A 69.3 ppb (68) N/A 38.2 ppb (37) N/A 3.0 ppb (3) N/A N/A 20.0 μg/m3 (68) 68.0
 
Feb. 22, 2021, 11 a.m. N/A N/A 53.7 ppb (51) N/A 37.3 ppb (36) N/A 2.0 ppb (2) N/A N/A 13.0 μg/m3 (53) 53.0
 
Feb. 22, 2021, 10 a.m. 47.1 ppb (45) 11.2 ppb (11) 48.1 ppb (46) 36.0 ppb (34) 36.1 ppb (35) 0.0 ppb (0) 2.0 ppb (2) 0.45 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
Feb. 22, 2021, 9 a.m. 79.2 ppb (78) 41.4 ppb (40) 83.0 ppb (82) 38.0 ppb (36) 40.6 ppb (39) 0.0 ppb (0) 2.0 ppb (2) 0.7 ppb (8) N/A 21.0 μg/m3 (70) 82.0
 
Feb. 22, 2021, 8 a.m. 80.5 ppb (80) 43.5 ppb (42) 94.5 ppb (95) 37.0 ppb (35) 41.7 ppb (40) 0.0 ppb (0) 2.0 ppb (2) 0.73 ppb (8) N/A 23.0 μg/m3 (74) 95.0
 
Feb. 22, 2021, 7 a.m. 82.8 ppb (82) 45.5 ppb (43) 97.7 ppb (98) 37.0 ppb (35) 45.7 ppb (44) 0.0 ppb (0) 2.0 ppb (2) 0.69 ppb (8) N/A 27.0 μg/m3 (83) 98.0
 
Feb. 22, 2021, 6 a.m. N/A N/A 108.1 ppb (103) N/A 46.7 ppb (45) N/A 2.0 ppb (2) N/A N/A 30.0 μg/m3 (89) 103.0
 
Feb. 22, 2021, 5 a.m. N/A N/A 90.6 ppb (90) N/A 48.3 ppb (46) N/A 3.0 ppb (3) N/A N/A 32.0 μg/m3 (93) 93.0
 
Feb. 22, 2021, 4 a.m. 57.4 ppb (55) 22.3 ppb (22) 44.3 ppb (42) 35.0 ppb (34) 39.3 ppb (38) 0.0 ppb (0) 4.0 ppb (4) 0.58 ppb (7) N/A 27.0 μg/m3 (83) 83.0
 
Feb. 22, 2021, 3 a.m. 49.6 ppb (47) 12.6 ppb (12) 41.4 ppb (40) 37.0 ppb (35) 38.7 ppb (37) 0.0 ppb (0) 6.0 ppb (6) 0.61 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Feb. 22, 2021, 2 a.m. 51.4 ppb (49) 13.5 ppb (13) 73.9 ppb (73) 38.0 ppb (36) 50.4 ppb (48) 0.0 ppb (0) 3.0 ppb (3) 0.67 ppb (8) N/A 21.0 μg/m3 (70) 73.0
 
Feb. 22, 2021, 1 a.m. 39.0 ppb (37) 1.8 ppb (2) 57.4 ppb (55) 37.0 ppb (35) 47.6 ppb (45) 0.0 ppb (0) 5.0 ppb (5) 0.46 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
Feb. 22, 2021, midnight 29.2 ppb (28) 0.4 ppb (1) 34.3 ppb (33) 29.0 ppb (28) 32.8 ppb (31) 0.0 ppb (0) 15.0 ppb (14) 0.38 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
Feb. 21, 2021, 11 p.m. 12.9 ppb (13) 0.0 ppb (0) 14.2 ppb (14) 13.0 ppb (13) 14.1 ppb (14) 0.0 ppb (0) 33.0 ppb (31) 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 21, 2021, 10 p.m. 3.0 ppb (3) 0.0 ppb (0) 2.8 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 43.0 ppb (40) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 40.0
 
Feb. 21, 2021, 9 p.m. 1.4 ppb (2) 0.1 ppb (1) 1.3 ppb (2) 1.0 ppb (1) 1.1 ppb (2) 0.0 ppb (0) 45.0 ppb (42) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 42.0
 
Feb. 21, 2021, 8 p.m. 1.5 ppb (2) 0.3 ppb (1) 1.4 ppb (2) 1.0 ppb (1) 1.1 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 43.0
 
Feb. 21, 2021, 7 p.m. 1.2 ppb (2) 0.3 ppb (1) 1.2 ppb (2) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 46.0 ppb (43) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 43.0
 
Feb. 21, 2021, 6 p.m. 1.3 ppb (2) 0.4 ppb (1) 1.3 ppb (2) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 42.0
 
Feb. 21, 2021, 5 p.m. 1.6 ppb (2) 0.5 ppb (1) 1.6 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 41.0
 
Feb. 21, 2021, 4 p.m. 1.6 ppb (2) 0.5 ppb (1) 1.6 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 40.0
 
Feb. 21, 2021, 3 p.m. 1.9 ppb (2) 0.7 ppb (1) 1.9 ppb (2) 1.0 ppb (1) 1.2 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 39.0
 
Feb. 21, 2021, 2 p.m. 2.9 ppb (3) 1.0 ppb (1) 2.9 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 38.0
 
Feb. 21, 2021, 1 p.m. 4.2 ppb (4) 1.2 ppb (2) 4.1 ppb (4) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 39.0 ppb (37) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 37.0
 
Feb. 21, 2021, noon 5.9 ppb (6) 0.8 ppb (1) 5.7 ppb (6) 5.0 ppb (5) 4.8 ppb (5) 0.0 ppb (0) 37.0 ppb (35) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 35.0
 
Feb. 21, 2021, 11 a.m. 5.4 ppb (6) 0.2 ppb (1) 5.2 ppb (5) 5.0 ppb (5) 4.9 ppb (5) 0.0 ppb (0) 37.0 ppb (35) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 35.0
 
Feb. 21, 2021, 10 a.m. 3.8 ppb (4) 0.1 ppb (1) 3.6 ppb (4) 4.0 ppb (4) 3.4 ppb (4) 0.0 ppb (0) 39.0 ppb (37) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 37.0
 
Feb. 21, 2021, 9 a.m. 3.1 ppb (3) 0.1 ppb (1) 2.9 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 40.0 ppb (38) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 38.0
 
Feb. 21, 2021, 8 a.m. 3.0 ppb (3) 0.1 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 40.0 ppb (38) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 38.0
 
Feb. 21, 2021, 7 a.m. 2.8 ppb (3) 0.1 ppb (1) 2.6 ppb (3) 3.0 ppb (3) 2.5 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 38.0
 
Feb. 21, 2021, 6 a.m. 2.9 ppb (3) 0.1 ppb (1) 2.7 ppb (3) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 38.0
 
Feb. 21, 2021, 5 a.m. 3.0 ppb (3) 0.1 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 38.0
 
Feb. 21, 2021, 4 a.m. 2.8 ppb (3) 0.1 ppb (1) 2.6 ppb (3) 3.0 ppb (3) 2.5 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.13 ppb (2) N/A 2.0 μg/m3 (9) 38.0
 
Feb. 21, 2021, 3 a.m. 3.0 ppb (3) 0.1 ppb (1) 2.9 ppb (3) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 38.0
 
Feb. 21, 2021, 2 a.m. 2.8 ppb (3) 0.1 ppb (1) 2.7 ppb (3) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 42.0 ppb (39) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 39.0
 
Feb. 21, 2021, 1 a.m. 4.1 ppb (4) 0.1 ppb (1) 4.0 ppb (4) 4.0 ppb (4) 3.9 ppb (4) 0.0 ppb (0) 42.0 ppb (39) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 39.0
 
Feb. 21, 2021, midnight 3.0 ppb (3) 0.1 ppb (1) 2.9 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 44.0 ppb (41) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 41.0
 
Feb. 20, 2021, 11 p.m. 2.9 ppb (3) 0.0 ppb (0) 2.8 ppb (3) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 44.0 ppb (41) 0.18 ppb (3) N/A 0.0 μg/m3 (0) 41.0
 
Feb. 20, 2021, 10 p.m. 3.6 ppb (4) 0.1 ppb (1) 3.5 ppb (4) 4.0 ppb (4) 3.3 ppb (4) 0.0 ppb (0) 44.0 ppb (41) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 41.0
 
Feb. 20, 2021, 9 p.m. 2.9 ppb (3) 0.2 ppb (1) 2.7 ppb (3) 3.0 ppb (3) 2.4 ppb (3) 0.0 ppb (0) 45.0 ppb (42) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 42.0
 
Feb. 20, 2021, 8 p.m. 2.4 ppb (3) 0.4 ppb (1) 2.4 ppb (3) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 43.0
 
Feb. 20, 2021, 7 p.m. 1.7 ppb (2) 0.4 ppb (1) 1.8 ppb (2) 1.0 ppb (1) 1.4 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 43.0
 
Feb. 20, 2021, 6 p.m. 1.8 ppb (2) 0.3 ppb (1) 1.8 ppb (2) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 42.0
 
Feb. 20, 2021, 5 p.m. 2.0 ppb (2) 0.4 ppb (1) 2.1 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 43.0 ppb (40) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 40.0
 
Feb. 20, 2021, 4 p.m. 2.4 ppb (3) 0.6 ppb (1) 2.5 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 39.0
 
Feb. 20, 2021, 3 p.m. 2.5 ppb (3) 0.8 ppb (1) 2.7 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 41.0 ppb (38) 0.19 ppb (3) N/A 6.0 μg/m3 (25) 38.0
 
Feb. 20, 2021, 2 p.m. 3.9 ppb (4) 1.3 ppb (2) 4.0 ppb (4) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) N/A 8.0 μg/m3 (34) 36.0
 
Feb. 20, 2021, 1 p.m. 7.3 ppb (7) 1.9 ppb (2) 7.3 ppb (7) 5.0 ppb (5) 5.4 ppb (6) 0.0 ppb (0) 32.0 ppb (30) 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 20, 2021, noon 12.8 ppb (13) 1.5 ppb (2) 12.9 ppb (13) 11.0 ppb (11) 11.4 ppb (11) 0.0 ppb (0) 27.0 ppb (25) 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 20, 2021, 11 a.m. 10.5 ppb (10) 0.2 ppb (1) 10.5 ppb (10) 10.0 ppb (10) 10.2 ppb (10) 0.0 ppb (0) 29.0 ppb (27) 0.22 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 20, 2021, 10 a.m. 6.8 ppb (7) 0.1 ppb (1) 6.7 ppb (7) 7.0 ppb (7) 6.6 ppb (7) 0.0 ppb (0) 34.0 ppb (32) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
Feb. 20, 2021, 9 a.m. 5.4 ppb (6) 0.1 ppb (1) 5.2 ppb (5) 5.0 ppb (5) 5.0 ppb (5) 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 33.0
 
Feb. 20, 2021, 8 a.m. 6.2 ppb (6) 0.1 ppb (1) 6.0 ppb (6) 6.0 ppb (6) 5.9 ppb (6) 0.0 ppb (0) 33.0 ppb (31) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
Feb. 20, 2021, 7 a.m. 6.8 ppb (7) 0.1 ppb (1) 6.7 ppb (7) 7.0 ppb (7) 6.5 ppb (7) 0.0 ppb (0) 33.0 ppb (31) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
Feb. 20, 2021, 6 a.m. 6.7 ppb (7) 0.2 ppb (1) 6.7 ppb (7) 7.0 ppb (7) 6.5 ppb (7) 0.0 ppb (0) 33.0 ppb (31) 0.21 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
Feb. 20, 2021, 5 a.m. 7.0 ppb (7) 0.1 ppb (1) 6.9 ppb (7) 7.0 ppb (7) 6.7 ppb (7) 0.0 ppb (0) 33.0 ppb (31) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
Feb. 20, 2021, 4 a.m. 7.6 ppb (8) 0.1 ppb (1) 7.4 ppb (7) 7.0 ppb (7) 7.2 ppb (7) 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
Feb. 20, 2021, 3 a.m. 7.9 ppb (8) 0.1 ppb (1) 7.8 ppb (8) 8.0 ppb (8) 7.7 ppb (8) 0.0 ppb (0) 32.0 ppb (30) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 20, 2021, 2 a.m. 8.6 ppb (9) 0.1 ppb (1) 8.5 ppb (9) 9.0 ppb (9) 8.3 ppb (8) 0.0 ppb (0) 31.0 ppb (29) 0.22 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 20, 2021, 1 a.m. 8.3 ppb (8) 0.1 ppb (1) 8.2 ppb (8) 8.0 ppb (8) 8.0 ppb (8) 0.0 ppb (0) 32.0 ppb (30) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
Feb. 20, 2021, midnight 9.1 ppb (9) 0.1 ppb (1) 9.0 ppb (9) 9.0 ppb (9) 8.8 ppb (9) 0.0 ppb (0) 32.0 ppb (30) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 30.0
 
Feb. 19, 2021, 11 p.m. 11.1 ppb (11) 0.1 ppb (1) 10.9 ppb (11) 11.0 ppb (11) 10.8 ppb (11) 0.0 ppb (0) 29.0 ppb (27) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Feb. 19, 2021, 10 p.m. 15.0 ppb (15) 0.3 ppb (1) 15.0 ppb (15) 15.0 ppb (15) 14.7 ppb (14) 0.0 ppb (0) 26.0 ppb (25) 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 19, 2021, 9 p.m. 16.9 ppb (16) 1.4 ppb (2) 16.8 ppb (16) 15.0 ppb (15) 15.4 ppb (15) 0.0 ppb (0) 25.0 ppb (24) 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 19, 2021, 8 p.m. 16.4 ppb (16) 2.2 ppb (3) 16.2 ppb (16) 14.0 ppb (14) 14.0 ppb (14) 0.0 ppb (0) 27.0 ppb (25) 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 19, 2021, 7 p.m. 18.5 ppb (18) 3.4 ppb (4) 18.1 ppb (18) 15.0 ppb (15) 14.7 ppb (14) 0.0 ppb (0) 26.0 ppb (25) 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 19, 2021, 6 p.m. 20.6 ppb (20) 3.9 ppb (4) 20.1 ppb (19) 17.0 ppb (17) 16.2 ppb (16) 0.0 ppb (0) 24.0 ppb (23) 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 19, 2021, 5 p.m. 21.2 ppb (20) 4.1 ppb (4) 20.7 ppb (20) 17.0 ppb (17) 16.6 ppb (16) 0.0 ppb (0) 25.0 ppb (24) 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 19, 2021, 4 p.m. 20.1 ppb (19) 5.2 ppb (5) 19.8 ppb (19) 15.0 ppb (15) 14.6 ppb (14) 0.0 ppb (0) 26.0 ppb (25) 0.27 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 19, 2021, 3 p.m. 19.9 ppb (19) 5.2 ppb (5) 18.7 ppb (18) 15.0 ppb (15) 13.7 ppb (13) 0.0 ppb (0) 26.0 ppb (25) 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 19, 2021, 2 p.m. 17.2 ppb (17) 5.0 ppb (5) 16.2 ppb (16) 12.0 ppb (12) 11.4 ppb (11) 0.0 ppb (0) 27.0 ppb (25) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 19, 2021, 1 p.m. 16.8 ppb (16) 3.0 ppb (3) 15.7 ppb (15) 14.0 ppb (14) 12.7 ppb (12) 0.0 ppb (0) 24.0 ppb (23) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 19, 2021, noon 14.6 ppb (14) 1.1 ppb (2) 13.4 ppb (13) 14.0 ppb (14) 12.4 ppb (12) 0.0 ppb (0) 26.0 ppb (25) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Feb. 19, 2021, 11 a.m. 6.0 ppb (6) 0.6 ppb (1) 4.7 ppb (5) 5.0 ppb (5) 4.2 ppb (4) 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 36.0
 
Feb. 19, 2021, 10 a.m. 7.0 ppb (7) 0.7 ppb (1) 5.4 ppb (6) 6.0 ppb (6) 4.8 ppb (5) 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Feb. 19, 2021, 9 a.m. 10.2 ppb (10) 0.2 ppb (1) 8.6 ppb (9) 10.0 ppb (10) 8.3 ppb (8) 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Feb. 19, 2021, 8 a.m. 6.1 ppb (6) 0.3 ppb (1) 4.7 ppb (5) 6.0 ppb (6) 4.3 ppb (5) 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
Feb. 19, 2021, 7 a.m. N/A N/A 2.8 ppb (3) N/A 2.4 ppb (3) N/A 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
Feb. 19, 2021, 6 a.m. N/A N/A 2.5 ppb (3) N/A 2.1 ppb (2) N/A 37.0 ppb (35) N/A N/A 3.0 μg/m3 (13) 35.0
 
Feb. 19, 2021, 5 a.m. N/A N/A 1.9 ppb (2) N/A 1.4 ppb (2) N/A 37.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
Feb. 19, 2021, 4 a.m. 3.8 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
Feb. 19, 2021, 3 a.m. 5.8 ppb (6) 0.4 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 19, 2021, 2 a.m. 14.6 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 23.0 ppb (22) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 19, 2021, 1 a.m. 13.8 ppb (14) 0.7 ppb (1) 13.7 ppb (13) 13.0 ppb (13) 13.0 ppb (13) 0.0 ppb (0) 24.0 ppb (23) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 19, 2021, midnight 13.9 ppb (14) 0.5 ppb (1) 14.2 ppb (14) 13.0 ppb (13) 13.6 ppb (13) 0.0 ppb (0) 26.0 ppb (25) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Feb. 18, 2021, 11 p.m. 12.9 ppb (13) 0.2 ppb (1) 13.0 ppb (13) 13.0 ppb (13) 12.7 ppb (12) 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
Feb. 18, 2021, 10 p.m. 10.2 ppb (10) 0.3 ppb (1) 10.2 ppb (10) 10.0 ppb (10) 9.9 ppb (10) 0.0 ppb (0) 31.0 ppb (29) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
Feb. 18, 2021, 9 p.m. 10.3 ppb (10) 0.8 ppb (1) 10.2 ppb (10) 10.0 ppb (10) 9.4 ppb (9) 0.0 ppb (0) 32.0 ppb (30) 0.2 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 18, 2021, 8 p.m. 9.6 ppb (10) 0.8 ppb (1) 9.6 ppb (10) 9.0 ppb (9) 8.7 ppb (9) 0.0 ppb (0) 33.0 ppb (31) 0.2 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 18, 2021, 7 p.m. 7.4 ppb (7) 1.0 ppb (1) 7.4 ppb (7) 7.0 ppb (7) 6.3 ppb (6) 0.0 ppb (0) 35.0 ppb (33) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
Feb. 18, 2021, 6 p.m. 6.1 ppb (6) 0.9 ppb (1) 6.0 ppb (6) 5.0 ppb (5) 5.1 ppb (5) 0.0 ppb (0) 37.0 ppb (35) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 35.0
 
Feb. 18, 2021, 5 p.m. 9.4 ppb (9) 1.7 ppb (2) 9.7 ppb (10) 8.0 ppb (8) 7.8 ppb (8) 0.0 ppb (0) 34.0 ppb (32) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Feb. 18, 2021, 4 p.m. 12.3 ppb (12) 2.5 ppb (3) 12.5 ppb (12) 10.0 ppb (10) 10.0 ppb (10) 0.0 ppb (0) 31.0 ppb (29) 0.19 ppb (3) N/A 2.0 μg/m3 (9) 29.0
 
Feb. 18, 2021, 3 p.m. 10.2 ppb (10) 2.3 ppb (3) 10.4 ppb (10) 8.0 ppb (8) 8.1 ppb (8) 0.0 ppb (0) 32.0 ppb (30) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
Feb. 18, 2021, 2 p.m. 8.2 ppb (8) 1.6 ppb (2) 8.5 ppb (9) 7.0 ppb (7) 6.9 ppb (7) 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
Feb. 18, 2021, 1 p.m. 9.8 ppb (10) 2.1 ppb (2) 9.8 ppb (10) 8.0 ppb (8) 7.7 ppb (8) 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
Feb. 18, 2021, noon 10.2 ppb (10) 1.1 ppb (2) 10.1 ppb (10) 9.0 ppb (9) 8.9 ppb (9) 0.0 ppb (0) 30.0 ppb (28) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 28.0
 
Feb. 18, 2021, 11 a.m. 9.6 ppb (10) 0.2 ppb (1) 9.8 ppb (10) 9.0 ppb (9) 9.4 ppb (9) 0.0 ppb (0) 30.0 ppb (28) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 28.0
 
Feb. 18, 2021, 10 a.m. 5.5 ppb (6) 0.4 ppb (1) 5.5 ppb (6) 5.0 ppb (5) 5.1 ppb (5) 0.0 ppb (0) N/A 0.17 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 18, 2021, 9 a.m. 6.2 ppb (6) 0.1 ppb (1) 6.2 ppb (6) 6.0 ppb (6) 6.0 ppb (6) 0.0 ppb (0) N/A 0.17 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 18, 2021, 8 a.m. 6.1 ppb (6) 0.2 ppb (1) 6.2 ppb (6) 6.0 ppb (6) 5.9 ppb (6) 0.0 ppb (0) 35.0 ppb (33) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 33.0
 
Feb. 18, 2021, 7 a.m. 7.0 ppb (7) 0.3 ppb (1) 7.0 ppb (7) 7.0 ppb (7) 6.5 ppb (7) 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Feb. 18, 2021, 6 a.m. 8.8 ppb (9) 0.5 ppb (1) 8.7 ppb (9) 8.0 ppb (8) 8.2 ppb (8) 0.0 ppb (0) 32.0 ppb (30) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
Feb. 18, 2021, 5 a.m. 10.2 ppb (10) 0.6 ppb (1) 10.4 ppb (10) 10.0 ppb (10) 9.9 ppb (10) 0.0 ppb (0) 31.0 ppb (29) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 18, 2021, 4 a.m. 27.2 ppb (26) 2.0 ppb (2) 27.2 ppb (26) 25.0 ppb (24) 25.5 ppb (25) 0.0 ppb (0) 17.0 ppb (16) 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 18, 2021, 3 a.m. 43.6 ppb (42) 8.3 ppb (8) 42.9 ppb (41) 35.0 ppb (34) 35.0 ppb (34) 0.0 ppb (0) 5.0 ppb (5) 0.47 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 18, 2021, 2 a.m. N/A N/A 27.7 ppb (27) N/A 26.4 ppb (25) N/A 11.0 ppb (11) N/A N/A 11.0 μg/m3 (46) 46.0
 
Feb. 18, 2021, 1 a.m. N/A N/A 31.1 ppb (30) N/A 29.8 ppb (29) N/A 13.0 ppb (13) N/A N/A 6.0 μg/m3 (25) 30.0
 
Feb. 18, 2021, midnight N/A N/A 21.9 ppb (21) N/A 20.5 ppb (20) N/A 26.0 ppb (25) N/A N/A 1.0 μg/m3 (5) 25.0
 
Feb. 17, 2021, 11 p.m. N/A N/A 8.5 ppb (9) N/A 8.4 ppb (8) N/A 34.0 ppb (32) N/A N/A 2.0 μg/m3 (9) 32.0