AQSQID: 440070030

Site Name: Near Road

Location: Providence, RI

Reporting: True, Located: True

Current AQI: 19.0

Providence RI, US: 41.829495, -71.417457

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 26, 2019, 4 p.m. 34620.0 ppb (8663) 20.3 ppb (19) N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 3.9 μg/m3 (16) 19.0
 
March 26, 2019, 3 p.m. 52340.0 ppb (13104) 36.9 ppb (34) N/A 15.0 ppb (14) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 34.0
 
March 26, 2019, 2 p.m. 34430.0 ppb (8616) 21.0 ppb (19) N/A 13.0 ppb (12) N/A N/A N/A 0.31 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
March 26, 2019, 1 p.m. 41820.0 ppb (10468) 25.4 ppb (24) N/A 16.0 ppb (15) N/A N/A N/A 0.4 ppb (4) N/A 3.9 μg/m3 (16) 24.0
 
March 26, 2019, noon 45.8 ppb (42) 27.9 ppb (26) N/A 18.0 ppb (17) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 26.0
 
March 26, 2019, 11 a.m. 59.0 ppb (55) 24.9 ppb (23) N/A 34.0 ppb (31) N/A N/A N/A 0.47 ppb (5) N/A 5.0 μg/m3 (21) 31.0
 
March 26, 2019, 10 a.m. 43.5 ppb (40) 17.5 ppb (16) N/A 26.0 ppb (24) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 24.0
 
March 26, 2019, 9 a.m. 54.8 ppb (51) 26.2 ppb (24) N/A 29.0 ppb (27) N/A N/A N/A 0.44 ppb (5) N/A 2.0 μg/m3 (8) 27.0
 
March 26, 2019, 8 a.m. 32910.0 ppb (8235) 15.9 ppb (15) N/A 17.0 ppb (16) N/A N/A N/A 0.31 ppb (3) N/A 2.0 μg/m3 (8) 16.0
 
March 26, 2019, 7 a.m. 25190.0 ppb (6300) 12.2 ppb (11) N/A 13.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 26, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 26, 2019, 5 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 26, 2019, 3 a.m. 46.2 ppb (43) 22.3 ppb (21) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 26, 2019, 2 a.m. 39.6 ppb (37) 20.2 ppb (19) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 26, 2019, 1 a.m. 32.8 ppb (30) 15.1 ppb (14) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
March 26, 2019, midnight 22.5 ppb (21) 8.1 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
March 25, 2019, 11 p.m. 29090.0 ppb (7277) 12.0 ppb (11) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 7.9 μg/m3 (33) 33.0
 
March 25, 2019, 10 p.m. 51450.0 ppb (12881) 25.1 ppb (23) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 24.0
 
March 25, 2019, 9 p.m. 59.3 ppb (56) 38.5 ppb (36) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 36.0
 
March 25, 2019, 8 p.m. 119.0 ppb (103) 104.0 ppb (101) N/A 15.0 ppb (14) N/A N/A N/A 2.62 ppb (29) N/A 4.0 μg/m3 (17) 101.0
 
March 25, 2019, 7 p.m. 62.7 ppb (59) 39.4 ppb (36) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 36.0
 
March 25, 2019, 6 p.m. 55.3 ppb (51) 38.7 ppb (36) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 36.0
 
March 25, 2019, 5 p.m. 48.3 ppb (45) 29.8 ppb (28) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 28.0
 
March 25, 2019, 4 p.m. 39.4 ppb (36) 23.6 ppb (22) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 22.0
 
March 25, 2019, 3 p.m. 39270.0 ppb (9829) 20.9 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 25, 2019, 2 p.m. 38370.0 ppb (9603) 20.7 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
March 25, 2019, 1 p.m. 53240.0 ppb (13330) 28.9 ppb (27) N/A 24.0 ppb (22) N/A N/A N/A 0.12 ppb (1) N/A 18.9 μg/m3 (65) 65.0
 
March 25, 2019, noon 101.1 ppb (100) 68.8 ppb (66) N/A 32.0 ppb (30) N/A N/A N/A 0.09 ppb (1) N/A 14.0 μg/m3 (54) 66.0
 
March 25, 2019, 11 a.m. 103.4 ppb (100) 64.3 ppb (61) N/A 39.0 ppb (36) N/A N/A N/A 0.05 ppb (1) N/A 15.0 μg/m3 (56) 61.0
 
March 25, 2019, 10 a.m. 111.5 ppb (102) 71.9 ppb (69) N/A 40.0 ppb (37) N/A N/A N/A 0.01 ppb (0) N/A 17.0 μg/m3 (61) 69.0
 
March 25, 2019, 9 a.m. 139.0 ppb (107) 98.4 ppb (97) N/A 41.0 ppb (38) N/A N/A N/A 0.0 ppb (0) N/A 13.9 μg/m3 (54) 97.0
 
March 25, 2019, 8 a.m. 101.3 ppb (100) 58.7 ppb (55) N/A 43.0 ppb (40) N/A N/A N/A 0.0 ppb (0) N/A 10.9 μg/m3 (45) 55.0
 
March 25, 2019, 7 a.m. 74240.0 ppb (18593) 41.0 ppb (38) N/A 33.0 ppb (31) N/A N/A N/A 0.0 ppb (0) N/A 6.9 μg/m3 (29) 38.0
 
March 25, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2019, 3 a.m. 24.0 ppb (22) 8.5 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A 0.09 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2019, 2 a.m. 35960.0 ppb (8999) 14.4 ppb (13) N/A 22.0 ppb (20) N/A N/A N/A 0.07 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 1 a.m. 35660.0 ppb (8924) 14.6 ppb (14) N/A 21.0 ppb (19) N/A N/A N/A 0.05 ppb (1) N/A 12.9 μg/m3 (52) 52.0
 
March 25, 2019, midnight 40260.0 ppb (10077) 18.3 ppb (17) N/A 22.0 ppb (20) N/A N/A N/A 0.04 ppb (0) N/A 11.9 μg/m3 (50) 50.0
 
March 24, 2019, 11 p.m. 44.1 ppb (41) 19.5 ppb (18) N/A 25.0 ppb (23) N/A N/A N/A 0.02 ppb (0) N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2019, 10 p.m. 38.7 ppb (36) 19.5 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A 0.01 ppb (0) N/A 3.0 μg/m3 (12) 18.0
 
March 24, 2019, 9 p.m. 35240.0 ppb (8819) 18.1 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A 0.0 ppb (0) N/A 3.0 μg/m3 (12) 17.0
 
March 24, 2019, 8 p.m. 41370.0 ppb (10355) 18.6 ppb (17) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 7 p.m. 33070.0 ppb (8275) 18.3 ppb (17) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 6 p.m. 23.1 ppb (21) 11.2 ppb (10) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 5 p.m. 23.6 ppb (22) 13.7 ppb (13) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2019, 4 p.m. 25.1 ppb (23) 16.8 ppb (16) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 3 p.m. 28.6 ppb (26) 16.5 ppb (15) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 2 p.m. 24.1 ppb (22) 13.2 ppb (12) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
March 24, 2019, 1 p.m. 33.0 ppb (31) 18.5 ppb (17) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 17.0
 
March 24, 2019, noon 26680.0 ppb (6673) 14.9 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A 0.0 ppb (0) N/A 3.9 μg/m3 (16) 16.0
 
March 24, 2019, 11 a.m. 36350.0 ppb (9097) 18.3 ppb (17) N/A 18.0 ppb (17) N/A N/A N/A 0.01 ppb (0) N/A 2.9 μg/m3 (12) 17.0
 
March 24, 2019, 10 a.m. 26700.0 ppb (6678) 12.0 ppb (11) N/A 15.0 ppb (14) N/A N/A N/A 0.03 ppb (0) N/A 1.0 μg/m3 (4) 14.0
 
March 24, 2019, 9 a.m. 14260.0 ppb (3560) 6.8 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.04 ppb (0) N/A 1.0 μg/m3 (4) 6.0
 
March 24, 2019, 8 a.m. 17020.0 ppb (4252) 6.2 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.03 ppb (0) N/A 3.0 μg/m3 (12) 12.0
 
March 24, 2019, 7 a.m. 23480.0 ppb (5871) 9.8 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.01 ppb (0) N/A 2.9 μg/m3 (12) 13.0
 
March 24, 2019, 6 a.m. 25400.0 ppb (6352) 15.1 ppb (14) N/A 10.0 ppb (9) N/A N/A N/A 0.01 ppb (0) N/A 1.0 μg/m3 (4) 14.0
 
March 24, 2019, 5 a.m. 18050.0 ppb (4510) 10.9 ppb (10) N/A 7.0 ppb (6) N/A N/A N/A 0.01 ppb (0) N/A 2.0 μg/m3 (8) 10.0
 
March 24, 2019, 3 a.m. 20.8 ppb (19) 13.7 ppb (13) N/A 7.0 ppb (6) N/A N/A N/A 0.02 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 2 a.m. 26.8 ppb (25) 16.9 ppb (16) N/A 10.0 ppb (9) N/A N/A N/A 0.01 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 1 a.m. 29.1 ppb (27) 18.3 ppb (17) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, midnight 30.7 ppb (28) 22.6 ppb (21) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 21.0
 
March 23, 2019, 11 p.m. 35.9 ppb (33) 23.0 ppb (21) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 21.0
 
March 23, 2019, 10 p.m. 31.9 ppb (30) 22.8 ppb (21) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 21.0
 
March 23, 2019, 9 p.m. 28.2 ppb (26) 17.4 ppb (16) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 8 p.m. 20390.0 ppb (5097) 12.8 ppb (12) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 7 p.m. 23.3 ppb (22) 16.3 ppb (15) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 6 p.m. 20.1 ppb (19) 15.3 ppb (14) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 5 p.m. 24.7 ppb (23) 15.9 ppb (15) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 4 p.m. 21.7 ppb (20) 14.9 ppb (14) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 3 p.m. 33.3 ppb (31) 23.2 ppb (21) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 21.0
 
March 23, 2019, 2 p.m. 27890.0 ppb (6976) 15.9 ppb (15) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 4.9 μg/m3 (20) 20.0
 
March 23, 2019, 1 p.m. 31310.0 ppb (7834) 23.8 ppb (22) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 22.0
 
March 23, 2019, noon 27070.0 ppb (6771) 18.6 ppb (17) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 11 a.m. 21.4 ppb (20) 17.1 ppb (16) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 10 a.m. 20.1 ppb (19) 13.5 ppb (12) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 12.0
 
March 23, 2019, 9 a.m. 12560.0 ppb (3134) 8.9 ppb (8) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
March 23, 2019, 8 a.m. 9630.0 ppb (2400) 5.8 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 5.0
 
March 23, 2019, 7 a.m. 12180.0 ppb (3039) 5.7 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
March 23, 2019, 6 a.m. 9540.0 ppb (2377) 7.7 ppb (7) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
March 23, 2019, 5 a.m. 7180.0 ppb (1786) 4.0 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -0.9 μg/m3 (0) 4.0
 
March 23, 2019, 4 a.m. 8850.0 ppb (2205) 5.7 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
March 23, 2019, 3 a.m. 15260.0 ppb (3811) 8.9 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.61 ppb (7) N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 2 a.m. 14680.0 ppb (3666) 8.6 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.6 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 1 a.m. 19390.0 ppb (4846) 10.9 ppb (10) N/A 8.0 ppb (7) N/A N/A N/A 0.57 ppb (6) N/A 5.9 μg/m3 (25) 25.0
 
March 23, 2019, midnight 33350.0 ppb (8345) 24.5 ppb (23) N/A 9.0 ppb (8) N/A N/A N/A 0.55 ppb (6) N/A 5.0 μg/m3 (21) 23.0
 
March 22, 2019, 11 p.m. 24.3 ppb (23) 16.4 ppb (15) N/A 8.0 ppb (7) N/A N/A N/A 0.54 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
March 22, 2019, 10 p.m. 34.1 ppb (32) 21.0 ppb (19) N/A 13.0 ppb (12) N/A N/A N/A 0.55 ppb (6) N/A 3.0 μg/m3 (12) 19.0
 
March 22, 2019, 9 p.m. 39.3 ppb (36) 23.3 ppb (22) N/A 16.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 5.0 μg/m3 (21) 22.0
 
March 22, 2019, 8 p.m. 34.3 ppb (32) 23.2 ppb (21) N/A 11.0 ppb (10) N/A N/A N/A 0.51 ppb (6) N/A N/A 21.0
 
March 22, 2019, 7 p.m. 46.5 ppb (43) 29.5 ppb (27) N/A 17.0 ppb (16) N/A N/A N/A 0.54 ppb (6) N/A 4.0 μg/m3 (17) 27.0
 
March 22, 2019, 6 p.m. 64440.0 ppb (16137) 42.4 ppb (39) N/A 22.0 ppb (20) N/A N/A N/A 0.58 ppb (6) N/A 4.0 μg/m3 (17) 39.0
 
March 22, 2019, 5 p.m. 84040.0 ppb (21049) 66.7 ppb (64) N/A 17.0 ppb (16) N/A N/A N/A 0.68 ppb (8) N/A 4.9 μg/m3 (20) 64.0
 
March 22, 2019, 4 p.m. 90410.0 ppb (22646) 56.8 ppb (53) N/A 34.0 ppb (31) N/A N/A N/A 0.61 ppb (7) N/A 0.9 μg/m3 (4) 53.0
 
March 22, 2019, 3 p.m. 75230.0 ppb (18841) 52.6 ppb (49) N/A 23.0 ppb (21) N/A N/A N/A 0.56 ppb (6) N/A 0.0 μg/m3 (0) 49.0
 
March 22, 2019, 2 p.m. 78890.0 ppb (19758) 52.8 ppb (49) N/A 26.0 ppb (24) N/A N/A N/A 0.61 ppb (7) N/A 0.0 μg/m3 (0) 49.0
 
March 22, 2019, 1 p.m. 31090.0 ppb (7778) 16.8 ppb (16) N/A 14.0 ppb (13) N/A N/A N/A 0.36 ppb (4) N/A -0.9 μg/m3 (0) 16.0
 
March 22, 2019, noon 13720.0 ppb (3425) 5.6 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.26 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
March 22, 2019, 11 a.m. 14430.0 ppb (3603) 6.6 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.26 ppb (3) N/A 3.9 μg/m3 (16) 16.0
 
March 22, 2019, 10 a.m. 13.7 ppb (13) 3.9 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.24 ppb (3) N/A 0.0 μg/m3 (0) 9.0
 
March 22, 2019, 9 a.m. 8490.0 ppb (2114) 3.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A -0.9 μg/m3 (0) 5.0
 
March 22, 2019, 8 a.m. 4090.0 ppb (1012) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.9 μg/m3 (16) 16.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
March 22, 2019, 3 a.m. 8910.0 ppb (2220) 3.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 3.9 μg/m3 (16) 16.0
 
March 22, 2019, 2 a.m. 12710.0 ppb (3172) 5.1 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
March 22, 2019, 1 a.m. 18490.0 ppb (4621) 7.8 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.37 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 22, 2019, midnight 18.6 ppb (17) 6.4 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 11 p.m. 23.9 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 10 p.m. 19840.0 ppb (4959) 8.5 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A 0.38 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 9 p.m. 25770.0 ppb (6445) 12.1 ppb (11) N/A 14.0 ppb (13) N/A N/A N/A 0.45 ppb (5) N/A 7.9 μg/m3 (33) 33.0
 
March 21, 2019, 8 p.m. 28600.0 ppb (7154) 13.8 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 7 p.m. 42150.0 ppb (10550) 21.9 ppb (20) N/A 20.0 ppb (19) N/A N/A N/A 0.45 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 6 p.m. 36.9 ppb (34) 21.0 ppb (19) N/A 16.0 ppb (15) N/A N/A N/A 0.43 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 5 p.m. 48440.0 ppb (12127) 25.6 ppb (24) N/A 23.0 ppb (21) N/A N/A N/A 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 4 p.m. 35690.0 ppb (8931) 21.8 ppb (20) N/A 14.0 ppb (13) N/A N/A N/A 0.44 ppb (5) N/A 12.9 μg/m3 (52) 52.0
 
March 21, 2019, 3 p.m. 35920.0 ppb (8989) 18.5 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 2 p.m. 50.5 ppb (47) 26.1 ppb (24) N/A 25.0 ppb (23) N/A N/A N/A 0.44 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 21, 2019, 1 p.m. 58.7 ppb (55) 28.5 ppb (26) N/A 30.0 ppb (28) N/A N/A N/A 0.52 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, noon 43.3 ppb (40) 18.1 ppb (17) N/A 25.0 ppb (23) N/A N/A N/A 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 11 a.m. 59870.0 ppb (14991) 25.1 ppb (23) N/A 35.0 ppb (32) N/A N/A N/A 0.48 ppb (5) N/A 14.9 μg/m3 (56) 56.0
 
March 21, 2019, 10 a.m. 143.2 ppb (108) 95.7 ppb (94) N/A 47.0 ppb (44) N/A N/A N/A 0.94 ppb (10) N/A 9.0 μg/m3 (38) 94.0
 
March 21, 2019, 9 a.m. 135.5 ppb (107) 90.4 ppb (89) N/A 45.0 ppb (42) N/A N/A N/A 0.9 ppb (10) N/A 9.0 μg/m3 (38) 89.0
 
March 21, 2019, 8 a.m. 50430.0 ppb (12626) 23.8 ppb (22) N/A 27.0 ppb (25) N/A N/A N/A 0.38 ppb (4) N/A 13.9 μg/m3 (54) 54.0
 
March 21, 2019, 7 a.m. 63.9 ppb (61) 35.8 ppb (33) N/A 28.0 ppb (26) N/A N/A N/A 0.35 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 6 a.m. 54.9 ppb (51) 24.1 ppb (22) N/A 31.0 ppb (29) N/A N/A N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 5 a.m. 41.2 ppb (38) 13.3 ppb (12) N/A 28.0 ppb (26) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 3 a.m. 42.9 ppb (40) 16.3 ppb (15) N/A 27.0 ppb (25) N/A N/A N/A 0.59 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 2 a.m. 39.3 ppb (36) 15.8 ppb (15) N/A 24.0 ppb (22) N/A N/A N/A 0.62 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 1 a.m. 36070.0 ppb (9027) 14.5 ppb (13) N/A 22.0 ppb (20) N/A N/A N/A 0.52 ppb (6) N/A 9.9 μg/m3 (41) 41.0
 
March 21, 2019, midnight 38720.0 ppb (9691) 14.3 ppb (13) N/A 24.0 ppb (22) N/A N/A N/A 0.49 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 11 p.m. 37260.0 ppb (9325) 15.0 ppb (14) N/A 22.0 ppb (20) N/A N/A N/A 0.51 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 10 p.m. 38470.0 ppb (9628) 17.6 ppb (16) N/A 21.0 ppb (19) N/A N/A N/A 0.56 ppb (6) N/A 10.9 μg/m3 (45) 45.0
 
March 20, 2019, 9 p.m. 37750.0 ppb (9448) 18.6 ppb (17) N/A 19.0 ppb (18) N/A N/A N/A 0.54 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 8 p.m. 36520.0 ppb (9139) 20.1 ppb (19) N/A 16.0 ppb (15) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 7 p.m. 31640.0 ppb (7916) 16.4 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A 0.44 ppb (5) N/A 10.9 μg/m3 (45) 45.0
 
March 20, 2019, 6 p.m. 23160.0 ppb (5791) 10.3 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 9.9 μg/m3 (41) 41.0
 
March 20, 2019, 5 p.m. 45730.0 ppb (11448) 23.8 ppb (22) N/A 22.0 ppb (20) N/A N/A N/A 0.42 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 4 p.m. 32200.0 ppb (8057) 16.7 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 3 p.m. 23950.0 ppb (5989) 11.2 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 2 p.m. 35580.0 ppb (8904) 17.2 ppb (16) N/A 18.0 ppb (17) N/A N/A N/A 0.4 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
March 20, 2019, 1 p.m. 143.7 ppb (108) 94.8 ppb (93) N/A 49.0 ppb (45) N/A N/A N/A 0.92 ppb (10) N/A 20.0 μg/m3 (67) 93.0
 
March 20, 2019, noon 152.3 ppb (110) 104.8 ppb (101) N/A 47.0 ppb (44) N/A N/A N/A 0.96 ppb (11) N/A 17.0 μg/m3 (61) 101.0
 
March 20, 2019, 11 a.m. 192.4 ppb (118) 144.2 ppb (108) N/A 48.0 ppb (44) N/A N/A N/A 1.29 ppb (14) N/A 16.0 μg/m3 (59) 108.0
 
March 20, 2019, 10 a.m. 229.6 ppb (125) 173.3 ppb (114) N/A 56.0 ppb (52) N/A N/A N/A 1.36 ppb (15) N/A 12.9 μg/m3 (52) 114.0
 
March 20, 2019, 9 a.m. 170.2 ppb (113) 125.4 ppb (105) N/A 45.0 ppb (42) N/A N/A N/A 0.99 ppb (11) N/A 9.9 μg/m3 (41) 105.0
 
March 20, 2019, 8 a.m. 122.3 ppb (104) 74.6 ppb (72) N/A 48.0 ppb (44) N/A N/A N/A 0.78 ppb (9) N/A 7.0 μg/m3 (29) 72.0
 
March 20, 2019, 7 a.m. 99640.0 ppb (24959) 55.8 ppb (52) N/A 44.0 ppb (41) N/A N/A N/A 0.53 ppb (6) N/A 9.9 μg/m3 (41) 52.0
 
March 20, 2019, 6 a.m. 90050.0 ppb (22555) 48.9 ppb (45) N/A 41.0 ppb (38) N/A N/A N/A 0.59 ppb (7) N/A 6.0 μg/m3 (25) 45.0
 
March 20, 2019, 5 a.m. 78140.0 ppb (19570) 37.8 ppb (35) N/A 40.0 ppb (37) N/A N/A N/A 0.61 ppb (7) N/A 7.0 μg/m3 (29) 37.0
 
March 20, 2019, 3 a.m. 66.5 ppb (63) 29.3 ppb (27) N/A 37.0 ppb (34) N/A N/A N/A 0.72 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 2 a.m. 78.3 ppb (76) 38.3 ppb (35) N/A 40.0 ppb (37) N/A N/A N/A 0.89 ppb (10) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 1 a.m. 86.2 ppb (84) 49.1 ppb (45) N/A 37.0 ppb (34) N/A N/A N/A 0.91 ppb (10) N/A 7.0 μg/m3 (29) 45.0
 
March 20, 2019, midnight 73.1 ppb (70) 39.7 ppb (37) N/A 33.0 ppb (31) N/A N/A N/A 0.84 ppb (9) N/A 6.0 μg/m3 (25) 37.0
 
March 19, 2019, 11 p.m. 61.1 ppb (58) 33.1 ppb (31) N/A 28.0 ppb (26) N/A N/A N/A 0.72 ppb (8) N/A 6.0 μg/m3 (25) 31.0
 
March 19, 2019, 10 p.m. 50880.0 ppb (12738) 31.1 ppb (29) N/A 20.0 ppb (19) N/A N/A N/A 0.63 ppb (7) N/A 5.0 μg/m3 (21) 29.0
 
March 19, 2019, 9 p.m. 45710.0 ppb (11443) 33.4 ppb (31) N/A 12.0 ppb (11) N/A N/A N/A 0.62 ppb (7) N/A 6.0 μg/m3 (25) 31.0
 
March 19, 2019, 8 p.m. 51.0 ppb (47) 32.2 ppb (30) N/A 19.0 ppb (18) N/A N/A N/A 0.55 ppb (6) N/A 6.0 μg/m3 (25) 30.0
 
March 19, 2019, 7 p.m. 48.7 ppb (45) 33.9 ppb (31) N/A 15.0 ppb (14) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (29) 31.0
 
March 19, 2019, 6 p.m. 66.1 ppb (63) 44.8 ppb (41) N/A 21.0 ppb (19) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (29) 41.0
 
March 19, 2019, 5 p.m. 53.6 ppb (50) 37.3 ppb (35) N/A 16.0 ppb (15) N/A N/A N/A 0.48 ppb (5) N/A 8.0 μg/m3 (33) 35.0
 
March 19, 2019, 4 p.m. 65010.0 ppb (16280) 44.4 ppb (41) N/A 21.0 ppb (19) N/A N/A N/A 0.45 ppb (5) N/A 9.0 μg/m3 (38) 41.0
 
March 19, 2019, 3 p.m. 71180.0 ppb (17826) 51.5 ppb (48) N/A 20.0 ppb (19) N/A N/A N/A 0.53 ppb (6) N/A 9.0 μg/m3 (38) 48.0
 
March 19, 2019, 2 p.m. 71020.0 ppb (17786) 48.0 ppb (44) N/A 23.0 ppb (21) N/A N/A N/A 0.53 ppb (6) N/A 10.0 μg/m3 (42) 44.0
 
March 19, 2019, 1 p.m. 71690.0 ppb (17954) 53.0 ppb (49) N/A 19.0 ppb (18) N/A N/A N/A 0.54 ppb (6) N/A 14.9 μg/m3 (56) 56.0
 
March 19, 2019, noon 104.3 ppb (101) 81.6 ppb (79) N/A 23.0 ppb (21) N/A N/A N/A 0.76 ppb (8) N/A 12.0 μg/m3 (50) 79.0
 
March 19, 2019, 11 a.m. 120.6 ppb (104) 81.7 ppb (79) N/A 39.0 ppb (36) N/A N/A N/A 0.96 ppb (11) N/A 15.9 μg/m3 (58) 79.0