AQSQID: 060811001

Site Name: Redwood City

Location: Redwood City (Ampex), CA

Reporting: True, Located: True

Current AQI: 42.0

Redwood City (Ampex) CA, US: 37.4828, -122.2022

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 21, 2020, 3 a.m. 34.2 ppb (32) 1.4 ppb (1) N/A 33.0 ppb (31) N/A N/A 10.0 ppb (8) 0.61 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 21, 2020, 2 a.m. 30.7 ppb (28) 0.4 ppb (0) N/A 30.0 ppb (28) N/A N/A 20.0 ppb (15) 0.68 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 21, 2020, 1 a.m. 17.1 ppb (16) 0.7 ppb (1) N/A 16.0 ppb (15) N/A N/A 36.0 ppb (28) 0.46 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 21, 2020, midnight 12.9 ppb (12) 1.1 ppb (1) N/A 12.0 ppb (11) N/A N/A 44.0 ppb (34) 0.4 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 20, 2020, 11 p.m. 15.1 ppb (14) 1.9 ppb (2) N/A 13.0 ppb (12) N/A N/A 40.0 ppb (31) 0.41 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 20, 2020, 10 p.m. 9.1 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 45.0 ppb (35) 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 20, 2020, 9 p.m. 12.6 ppb (12) 2.5 ppb (2) N/A 10.0 ppb (9) N/A N/A 40.0 ppb (31) 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 20, 2020, 8 p.m. 18.7 ppb (17) 5.1 ppb (5) N/A 14.0 ppb (13) N/A N/A 28.0 ppb (22) 0.42 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 20, 2020, 7 p.m. 27.2 ppb (25) 9.9 ppb (9) N/A 17.0 ppb (16) N/A N/A 20.0 ppb (15) 0.47 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Feb. 20, 2020, 6 p.m. 33.2 ppb (31) 13.0 ppb (12) N/A 20.0 ppb (19) N/A N/A 16.0 ppb (12) 0.53 ppb (6) N/A 23.0 μg/m3 (73) 73.0
 
Feb. 20, 2020, 5 p.m. 38.2 ppb (35) 15.6 ppb (14) N/A 23.0 ppb (21) N/A N/A 12.0 ppb (9) 0.57 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Feb. 20, 2020, 4 p.m. 59.6 ppb (56) 33.4 ppb (31) N/A 26.0 ppb (24) N/A N/A 5.0 ppb (4) 0.78 ppb (9) N/A 13.0 μg/m3 (52) 56.0
 
Feb. 20, 2020, 3 p.m. 118.9 ppb (103) 89.2 ppb (87) N/A 30.0 ppb (28) N/A N/A 1.0 ppb (1) 1.28 ppb (14) N/A 16.0 μg/m3 (59) 103.0
 
Feb. 20, 2020, 2 p.m. 60.7 ppb (57) 36.7 ppb (34) N/A 24.0 ppb (22) N/A N/A 0.0 ppb (0) 0.8 ppb (9) N/A 8.0 μg/m3 (33) 57.0
 
Feb. 20, 2020, 1 p.m. 30.7 ppb (28) 8.8 ppb (8) N/A 22.0 ppb (20) N/A N/A 1.0 ppb (1) 0.49 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 20, 2020, noon 22.7 ppb (21) 4.4 ppb (4) N/A 18.0 ppb (17) N/A N/A 3.0 ppb (2) 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 20, 2020, 10 a.m. 15.7 ppb (15) 0.2 ppb (0) N/A 15.0 ppb (14) N/A N/A 8.0 ppb (6) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 20, 2020, 9 a.m. 23.9 ppb (22) 4.6 ppb (4) N/A 19.0 ppb (18) N/A N/A 5.0 ppb (4) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 20, 2020, 8 a.m. 20.7 ppb (19) 1.0 ppb (1) N/A 20.0 ppb (19) N/A N/A 5.0 ppb (4) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 20, 2020, 7 a.m. 25.1 ppb (23) 2.4 ppb (2) N/A 23.0 ppb (21) N/A N/A 4.0 ppb (3) 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 20, 2020, 6 a.m. 41.5 ppb (38) 13.4 ppb (12) N/A 28.0 ppb (26) N/A N/A 1.0 ppb (1) 0.59 ppb (7) N/A 8.0 μg/m3 (33) 38.0
 
Feb. 20, 2020, 5 a.m. 52.9 ppb (49) 22.1 ppb (20) N/A 31.0 ppb (29) N/A N/A 1.0 ppb (1) 0.84 ppb (9) N/A 16.0 μg/m3 (59) 59.0
 
Feb. 20, 2020, 4 a.m. 41.2 ppb (38) 8.8 ppb (8) N/A 32.0 ppb (30) N/A N/A 2.0 ppb (2) 0.7 ppb (8) N/A 14.0 μg/m3 (54) 54.0
 
Feb. 20, 2020, 3 a.m. 36.9 ppb (34) 3.4 ppb (3) N/A 34.0 ppb (31) N/A N/A 5.0 ppb (4) 0.69 ppb (8) N/A 16.0 μg/m3 (59) 59.0
 
Feb. 20, 2020, 2 a.m. 28.3 ppb (26) 1.4 ppb (1) N/A 27.0 ppb (25) N/A N/A 14.0 ppb (11) 0.54 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 20, 2020, 1 a.m. 19.1 ppb (18) 1.4 ppb (1) N/A 18.0 ppb (17) N/A N/A 25.0 ppb (19) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 20, 2020, midnight 14.2 ppb (13) 1.7 ppb (2) N/A 12.0 ppb (11) N/A N/A 36.0 ppb (28) 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 19, 2020, 11 p.m. 17.7 ppb (16) 3.7 ppb (3) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) 0.36 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 19, 2020, 10 p.m. 9.7 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 19, 2020, 9 p.m. 7.7 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 32.0
 
Feb. 19, 2020, 8 p.m. 11.8 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) 0.34 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Feb. 19, 2020, 7 p.m. 15.7 ppb (15) 5.2 ppb (5) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.35 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Feb. 19, 2020, 6 p.m. 19.5 ppb (18) 6.9 ppb (6) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.38 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Feb. 19, 2020, 5 p.m. 19.2 ppb (18) 7.2 ppb (7) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.38 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Feb. 19, 2020, 4 p.m. 37.9 ppb (35) 17.0 ppb (16) N/A 21.0 ppb (19) N/A N/A 9.0 ppb (7) 0.62 ppb (7) N/A 17.0 μg/m3 (61) 61.0
 
Feb. 19, 2020, 3 p.m. 87.7 ppb (86) 57.2 ppb (53) N/A 31.0 ppb (29) N/A N/A 1.0 ppb (1) 1.02 ppb (11) N/A 15.0 μg/m3 (56) 86.0
 
Feb. 19, 2020, 2 p.m. 47.4 ppb (44) 22.1 ppb (20) N/A 25.0 ppb (23) N/A N/A 1.0 ppb (1) 0.74 ppb (8) N/A 7.0 μg/m3 (29) 44.0
 
Feb. 19, 2020, 1 p.m. 22.7 ppb (21) 2.9 ppb (3) N/A 20.0 ppb (19) N/A N/A 5.0 ppb (4) 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 19, 2020, noon 24.5 ppb (23) 4.6 ppb (4) N/A 20.0 ppb (19) N/A N/A 3.0 ppb (2) 0.37 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 19, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Feb. 19, 2020, 10 a.m. 13.6 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (13) N/A N/A 11.0 ppb (8) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 19, 2020, 9 a.m. 19.0 ppb (18) 0.8 ppb (1) N/A 18.0 ppb (17) N/A N/A 6.0 ppb (5) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 19, 2020, 8 a.m. 17.0 ppb (16) 0.3 ppb (0) N/A 17.0 ppb (16) N/A N/A 10.0 ppb (8) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 19, 2020, 7 a.m. 28.8 ppb (27) 4.4 ppb (4) N/A 24.0 ppb (22) N/A N/A 4.0 ppb (3) 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 19, 2020, 6 a.m. 27.1 ppb (25) 2.3 ppb (2) N/A 25.0 ppb (23) N/A N/A 5.0 ppb (4) 0.49 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 19, 2020, 5 a.m. 32.4 ppb (30) 4.0 ppb (4) N/A 29.0 ppb (27) N/A N/A 7.0 ppb (5) 0.47 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 19, 2020, 4 a.m. 45.1 ppb (42) 11.8 ppb (11) N/A 33.0 ppb (31) N/A N/A 3.0 ppb (2) 0.53 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 19, 2020, 3 a.m. 35.9 ppb (33) 5.6 ppb (5) N/A 30.0 ppb (28) N/A N/A 8.0 ppb (6) 0.59 ppb (7) N/A 7.0 μg/m3 (29) 33.0
 
Feb. 19, 2020, 2 a.m. 18.5 ppb (17) 0.7 ppb (1) N/A 18.0 ppb (17) N/A N/A 23.0 ppb (18) 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 19, 2020, 1 a.m. 17.4 ppb (16) 1.3 ppb (1) N/A 16.0 ppb (15) N/A N/A 27.0 ppb (21) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 19, 2020, midnight 10.9 ppb (10) 1.2 ppb (1) N/A 10.0 ppb (9) N/A N/A 40.0 ppb (31) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 31.0
 
Feb. 18, 2020, 11 p.m. 7.5 ppb (7) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 43.0 ppb (33) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 33.0
 
Feb. 18, 2020, 10 p.m. 6.0 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 18, 2020, 9 p.m. 4.1 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.23 ppb (3) N/A N/A 33.0
 
Feb. 18, 2020, 8 p.m. 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.22 ppb (2) N/A N/A 32.0
 
Feb. 18, 2020, 7 p.m. 3.8 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.2 ppb (2) N/A N/A 31.0
 
Feb. 18, 2020, 6 p.m. 4.8 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.2 ppb (2) N/A N/A 29.0
 
Feb. 18, 2020, 4 p.m. 40.6 ppb (38) 19.9 ppb (18) N/A 21.0 ppb (19) N/A N/A 20.0 ppb (15) 0.66 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 18, 2020, 3 p.m. 138.1 ppb (107) 93.7 ppb (92) N/A 44.0 ppb (41) N/A N/A 1.0 ppb (1) 1.6 ppb (18) N/A 10.0 μg/m3 (42) 107.0
 
Feb. 18, 2020, 2 p.m. 53.5 ppb (50) 19.4 ppb (18) N/A 34.0 ppb (31) N/A N/A 3.0 ppb (2) 0.93 ppb (10) N/A 10.0 μg/m3 (42) 50.0
 
Feb. 18, 2020, 1 p.m. 23.0 ppb (21) 1.5 ppb (1) N/A 21.0 ppb (19) N/A N/A 11.0 ppb (8) 0.53 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 18, 2020, noon 19.3 ppb (18) 0.8 ppb (1) N/A 19.0 ppb (18) N/A N/A 9.0 ppb (7) 0.42 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 18, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Feb. 18, 2020, 10 a.m. 13.2 ppb (12) 0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 13.0 ppb (10) 0.39 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 18, 2020, 9 a.m. 9.3 ppb (9) -0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) 0.4 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 18, 2020, 8 a.m. 8.7 ppb (8) -0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 22.0 ppb (17) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 18, 2020, 7 a.m. 13.4 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 18, 2020, 6 a.m. 21.0 ppb (19) 1.3 ppb (1) N/A 20.0 ppb (19) N/A N/A 10.0 ppb (8) 0.49 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 18, 2020, 5 a.m. 27.9 ppb (26) 2.1 ppb (2) N/A 26.0 ppb (24) N/A N/A 5.0 ppb (4) 0.64 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 18, 2020, 4 a.m. 29.6 ppb (27) 2.7 ppb (3) N/A 27.0 ppb (25) N/A N/A 7.0 ppb (5) 0.67 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 18, 2020, 3 a.m. 26.4 ppb (24) 2.7 ppb (3) N/A 24.0 ppb (22) N/A N/A 14.0 ppb (11) 0.62 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 18, 2020, 2 a.m. 13.6 ppb (13) 0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A 28.0 ppb (22) 0.48 ppb (5) N/A 5.0 μg/m3 (21) 22.0
 
Feb. 18, 2020, 1 a.m. 8.4 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) 0.42 ppb (5) N/A 3.0 μg/m3 (12) 28.0
 
Feb. 18, 2020, midnight 7.7 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.46 ppb (5) N/A 6.0 μg/m3 (25) 32.0
 
Feb. 17, 2020, 11 p.m. 4.7 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.38 ppb (4) N/A 7.0 μg/m3 (29) 35.0
 
Feb. 17, 2020, 10 p.m. 5.2 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 34.0
 
Feb. 17, 2020, 9 p.m. 5.8 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.4 ppb (4) N/A 5.0 μg/m3 (21) 32.0
 
Feb. 17, 2020, 8 p.m. 5.3 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.42 ppb (5) N/A 5.0 μg/m3 (21) 30.0
 
Feb. 17, 2020, 7 p.m. 8.0 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 24.0
 
Feb. 17, 2020, 6 p.m. 17.2 ppb (16) 6.7 ppb (6) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.54 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 17, 2020, 5 p.m. 33.8 ppb (31) 18.1 ppb (17) N/A 16.0 ppb (15) N/A N/A 9.0 ppb (7) 0.71 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 17, 2020, 4 p.m. 63.9 ppb (61) 45.7 ppb (42) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) 1.08 ppb (12) N/A 3.0 μg/m3 (12) 61.0
 
Feb. 17, 2020, 3 p.m. 51.0 ppb (47) 37.5 ppb (35) N/A 14.0 ppb (13) N/A N/A 0.0 ppb (0) 1.05 ppb (12) N/A 3.0 μg/m3 (12) 47.0
 
Feb. 17, 2020, 2 p.m. 35.6 ppb (33) 24.6 ppb (23) N/A 11.0 ppb (10) N/A N/A 0.0 ppb (0) 0.72 ppb (8) N/A 4.0 μg/m3 (17) 33.0
 
Feb. 17, 2020, 1 p.m. 16.7 ppb (15) 6.8 ppb (6) N/A 10.0 ppb (9) N/A N/A 0.0 ppb (0) 0.52 ppb (6) N/A 2.0 μg/m3 (8) 15.0
 
Feb. 17, 2020, noon 13.5 ppb (12) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.4 ppb (4) N/A 1.0 μg/m3 (4) 12.0
 
Feb. 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Feb. 17, 2020, 10 a.m. 10.8 ppb (10) 1.5 ppb (1) N/A 9.0 ppb (8) N/A N/A 2.0 ppb (2) 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 17, 2020, 9 a.m. 8.1 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 5.0 ppb (4) 0.39 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 17, 2020, 8 a.m. 8.2 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 7.0 ppb (5) 0.39 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 17, 2020, 7 a.m. 14.5 ppb (13) 1.2 ppb (1) N/A 13.0 ppb (12) N/A N/A 4.0 ppb (3) 0.48 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 17, 2020, 6 a.m. 13.4 ppb (12) 1.1 ppb (1) N/A 12.0 ppb (11) N/A N/A 9.0 ppb (7) 0.5 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 17, 2020, 5 a.m. 5.9 ppb (5) -0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.41 ppb (5) N/A 4.0 μg/m3 (17) 20.0
 
Feb. 17, 2020, 4 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.35 ppb (4) N/A 3.0 μg/m3 (12) 25.0
 
Feb. 17, 2020, 3 a.m. 2.1 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 26.0
 
Feb. 17, 2020, 2 a.m. 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.36 ppb (4) N/A 3.0 μg/m3 (12) 25.0
 
Feb. 17, 2020, 1 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.35 ppb (4) N/A 1.0 μg/m3 (4) 27.0
 
Feb. 17, 2020, midnight 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.34 ppb (4) N/A 3.0 μg/m3 (12) 28.0
 
Feb. 16, 2020, 11 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 28.0
 
Feb. 16, 2020, 10 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 16, 2020, 9 p.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 16, 2020, 8 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 29.0
 
Feb. 16, 2020, 7 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 29.0
 
Feb. 16, 2020, 6 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 29.0
 
Feb. 16, 2020, 5 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 29.0
 
Feb. 16, 2020, 4 p.m. 3.8 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
Feb. 16, 2020, 3 p.m. 4.6 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.36 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
Feb. 16, 2020, 2 p.m. 13.7 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (12) N/A N/A 12.0 ppb (9) 0.4 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 16, 2020, 1 p.m. 14.8 ppb (14) 0.5 ppb (0) N/A 14.0 ppb (13) N/A N/A 8.0 ppb (6) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 16, 2020, noon 13.9 ppb (13) 0.2 ppb (0) N/A 14.0 ppb (13) N/A N/A 8.0 ppb (6) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 16, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Feb. 16, 2020, 10 a.m. 11.2 ppb (10) -0.2 ppb (0) N/A 11.0 ppb (10) N/A N/A 11.0 ppb (8) 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 16, 2020, 9 a.m. 11.4 ppb (11) 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 10.0 ppb (8) 0.41 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 16, 2020, 8 a.m. 12.4 ppb (11) 0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A 10.0 ppb (8) 0.47 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 16, 2020, 7 a.m. 20.2 ppb (19) 2.1 ppb (2) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (4) 0.59 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 16, 2020, 6 a.m. 19.0 ppb (18) 1.4 ppb (1) N/A 18.0 ppb (17) N/A N/A 8.0 ppb (6) 0.58 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 16, 2020, 5 a.m. 25.8 ppb (24) 4.5 ppb (4) N/A 21.0 ppb (19) N/A N/A 4.0 ppb (3) 0.67 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 16, 2020, 4 a.m. 17.1 ppb (16) 1.2 ppb (1) N/A 16.0 ppb (15) N/A N/A 15.0 ppb (12) 0.56 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 16, 2020, 3 a.m. 5.1 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.38 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 16, 2020, 2 a.m. 6.1 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (19) 0.39 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 16, 2020, 1 a.m. 7.1 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.41 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 16, 2020, midnight 7.6 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.38 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 15, 2020, 11 p.m. 6.9 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.39 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 15, 2020, 10 p.m. 6.9 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.4 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 15, 2020, 9 p.m. 7.0 ppb (6) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 15, 2020, 8 p.m. 5.6 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.38 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Feb. 15, 2020, 7 p.m. 9.7 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 15, 2020, 6 p.m. 9.7 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.45 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 15, 2020, 5 p.m. 17.2 ppb (16) 5.6 ppb (5) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.55 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 15, 2020, 4 p.m. 29.0 ppb (27) 12.6 ppb (12) N/A 16.0 ppb (15) N/A N/A 8.0 ppb (6) 0.7 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 15, 2020, 3 p.m. 67.1 ppb (64) 47.8 ppb (44) N/A 19.0 ppb (18) N/A N/A 1.0 ppb (1) 1.11 ppb (12) N/A 10.0 μg/m3 (42) 64.0
 
Feb. 15, 2020, 2 p.m. 31.0 ppb (29) 13.0 ppb (12) N/A 18.0 ppb (17) N/A N/A 3.0 ppb (2) 0.66 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 15, 2020, 1 p.m. 21.1 ppb (20) 4.3 ppb (4) N/A 17.0 ppb (16) N/A N/A 1.0 ppb (1) 0.54 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 15, 2020, noon 15.8 ppb (15) 2.8 ppb (3) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 15, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Feb. 15, 2020, 10 a.m. 10.3 ppb (10) 0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 10.0 ppb (8) 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 15, 2020, 9 a.m. 15.1 ppb (14) 1.4 ppb (1) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 15, 2020, 8 a.m. 16.8 ppb (16) 1.9 ppb (2) N/A 15.0 ppb (14) N/A N/A 3.0 ppb (2) 0.53 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 15, 2020, 7 a.m. 26.2 ppb (24) 6.0 ppb (6) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.66 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 15, 2020, 6 a.m. 27.5 ppb (25) 5.7 ppb (5) N/A 22.0 ppb (20) N/A N/A 2.0 ppb (2) 0.7 ppb (8) N/A 16.0 μg/m3 (59) 59.0
 
Feb. 15, 2020, 5 a.m. 20.7 ppb (19) 1.5 ppb (1) N/A 19.0 ppb (18) N/A N/A 8.0 ppb (6) 0.57 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 15, 2020, 4 a.m. 27.1 ppb (25) 2.6 ppb (2) N/A 24.0 ppb (22) N/A N/A 5.0 ppb (4) 0.57 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 15, 2020, 3 a.m. 26.9 ppb (25) 1.4 ppb (1) N/A 26.0 ppb (24) N/A N/A 8.0 ppb (6) 0.63 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 15, 2020, 2 a.m. 19.0 ppb (18) 0.6 ppb (1) N/A 18.0 ppb (17) N/A N/A 17.0 ppb (13) 0.52 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 15, 2020, 1 a.m. 18.3 ppb (17) 1.3 ppb (1) N/A 17.0 ppb (16) N/A N/A 21.0 ppb (16) 0.52 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 15, 2020, midnight 10.8 ppb (10) 1.2 ppb (1) N/A 10.0 ppb (9) N/A N/A 33.0 ppb (25) 0.5 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 14, 2020, 11 p.m. 7.8 ppb (7) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.41 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 10 p.m. 7.1 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 9 p.m. 7.5 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.41 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 14, 2020, 8 p.m. 6.5 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.38 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 14, 2020, 7 p.m. 5.7 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.37 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 6 p.m. 6.9 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 5 p.m. 5.9 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.37 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 14, 2020, 4 p.m. 6.4 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 14, 2020, 3 p.m. 11.9 ppb (11) 1.4 ppb (1) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 14, 2020, 2 p.m. 7.2 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 1 p.m. 3.6 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.35 ppb (4) N/A 4.0 μg/m3 (17) 26.0
 
Feb. 14, 2020, noon 2.1 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.31 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
Feb. 14, 2020, 11 a.m. 2.3 ppb (2) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
Feb. 14, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Feb. 14, 2020, 9 a.m. 2.6 ppb (2) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 23.0
 
Feb. 14, 2020, 8 a.m. 3.6 ppb (3) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (20) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 14, 2020, 7 a.m. 3.6 ppb (3) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.33 ppb (4) N/A 3.0 μg/m3 (12) 21.0
 
Feb. 14, 2020, 6 a.m. 2.2 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.33 ppb (4) N/A 2.0 μg/m3 (8) 26.0
 
Feb. 14, 2020, 5 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.36 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
Feb. 14, 2020, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.38 ppb (4) N/A 6.0 μg/m3 (25) 27.0
 
Feb. 14, 2020, 3 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.4 ppb (4) N/A 6.0 μg/m3 (25) 28.0