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 |