ID: 485

AQSQID: 250250042

Site Name: Boston - Roxbury

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

Updated: May 26, 2022, 8:19 a.m.

Location: Roxbury (Roxbury), MA

Reporting: True, Located: True

Current AQI: 27.0

Roxbury (Roxbury) MA, US: 42.329399, -71.082497

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 26, 2022, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.8 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (27) 0.13 ppb (2) N/A 3.0 μg/m3 (13) 27.0
 
May 26, 2022, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) 3.6 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 29.0
 
May 26, 2022, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) 5.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
May 26, 2022, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) 4.3 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.13 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
May 26, 2022, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) 4.4 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.12 ppb (2) N/A 3.0 μg/m3 (13) 29.0
 
May 26, 2022, 1 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.8 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
May 26, 2022, midnight 4.0 ppb (4) 0.0 ppb (0) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
May 25, 2022, 11 p.m. 6.0 ppb (6) 1.0 ppb (1) 6.5 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
May 25, 2022, 10 p.m. 5.0 ppb (5) 1.0 ppb (1) 5.6 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 35.0
 
May 25, 2022, 10 p.m. 5.0 ppb (5) 1.0 ppb (1) 5.6 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 35.0
 
May 25, 2022, 9 p.m. 8.0 ppb (8) 2.0 ppb (2) 9.9 ppb (10) 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 34.0
 
May 25, 2022, 8 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.7 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
May 25, 2022, 8 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.7 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
May 25, 2022, 7 p.m. 8.0 ppb (8) 2.0 ppb (2) 8.6 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.13 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
May 25, 2022, 7 p.m. 8.0 ppb (8) 2.0 ppb (2) 8.6 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.13 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
May 25, 2022, 6 p.m. 7.0 ppb (7) 2.0 ppb (2) 8.5 ppb (9) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.12 ppb (2) N/A 5.0 μg/m3 (21) 30.0
 
May 25, 2022, 6 p.m. 7.0 ppb (7) 2.0 ppb (2) 8.5 ppb (9) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.12 ppb (2) N/A 5.0 μg/m3 (21) 30.0
 
May 25, 2022, 5 p.m. 7.0 ppb (7) 2.0 ppb (2) 7.8 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
May 25, 2022, 5 p.m. 7.0 ppb (7) 2.0 ppb (2) 7.8 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
May 25, 2022, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.5 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.13 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
May 25, 2022, 3 p.m. 8.0 ppb (8) 3.0 ppb (3) 10.0 ppb (10) 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (29) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
May 25, 2022, 1 p.m. 10.0 ppb (10) 4.0 ppb (4) 11.0 ppb (11) 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
May 25, 2022, 9 a.m. 14.0 ppb (14) 2.0 ppb (2) 16.0 ppb (16) 12.0 ppb (12) N/A 0.0 ppb (0) 9.0 ppb (9) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 25, 2022, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.3 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (21) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
May 25, 2022, 4 a.m. 6.0 ppb (6) 0.0 ppb (0) 6.8 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (22) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
May 25, 2022, 1 a.m. 5.0 ppb (5) 0.0 ppb (0) 6.3 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (24) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
May 25, 2022, midnight 7.0 ppb (7) 1.0 ppb (1) 8.4 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
May 24, 2022, 9 p.m. 4.0 ppb (4) 1.0 ppb (1) 4.9 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.16 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
May 24, 2022, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.1 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
May 24, 2022, 7 p.m. 4.0 ppb (4) 1.0 ppb (1) 4.5 ppb (5) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 29.0
 
May 24, 2022, 6 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.9 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 29.0
 
May 24, 2022, 5 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.8 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 29.0
 
May 24, 2022, 4 p.m. 4.0 ppb (4) 2.0 ppb (2) 4.9 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) 0.13 ppb (2) N/A 4.0 μg/m3 (17) 30.0
 
May 24, 2022, 3 p.m. 7.0 ppb (7) 2.0 ppb (2) 7.9 ppb (8) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
May 24, 2022, 2 p.m. 8.0 ppb (8) 3.0 ppb (3) 10.1 ppb (10) 5.0 ppb (5) N/A 1.0 ppb (2) 30.0 ppb (28) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
May 24, 2022, 1 p.m. 8.0 ppb (8) 3.0 ppb (3) 9.6 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (2) 28.0 ppb (26) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 26.0
 
May 24, 2022, noon 8.0 ppb (8) 2.0 ppb (2) 9.0 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
May 24, 2022, 10 a.m. 7.0 ppb (7) 2.0 ppb (2) 8.0 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
May 24, 2022, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) 4.5 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 26.0
 
May 24, 2022, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.8 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (26) 0.11 ppb (2) N/A 3.0 μg/m3 (13) 26.0
 
May 24, 2022, 6 a.m. N/A N/A 6.5 ppb (7) N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.12 ppb (2) N/A 3.0 μg/m3 (13) 24.0
 
May 24, 2022, 5 a.m. N/A N/A 13.7 ppb (13) N/A N/A 0.0 ppb (0) 17.0 ppb (16) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 24, 2022, 5 a.m. N/A N/A 13.7 ppb (13) N/A N/A 0.0 ppb (0) 17.0 ppb (16) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 24, 2022, 4 a.m. 7.0 ppb (7) 0.0 ppb (0) 7.7 ppb (8) 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 24.0
 
May 24, 2022, 4 a.m. 7.0 ppb (7) 0.0 ppb (0) 7.7 ppb (8) 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 24.0
 
May 24, 2022, 3 a.m. 16.0 ppb (16) 1.0 ppb (1) 17.7 ppb (17) 15.0 ppb (15) N/A N/A 20.0 ppb (19) 0.27 ppb (4) N/A 4.0 μg/m3 (17) 19.0
 
May 24, 2022, 2 a.m. 13.0 ppb (13) 0.0 ppb (0) 15.8 ppb (15) 13.0 ppb (13) N/A 0.0 ppb (0) 22.0 ppb (21) 0.29 ppb (4) N/A 4.0 μg/m3 (17) 21.0
 
May 24, 2022, 1 a.m. 11.0 ppb (11) 1.0 ppb (1) 11.3 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 26.0 ppb (25) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
May 24, 2022, midnight 7.0 ppb (7) 0.0 ppb (0) 7.2 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (29) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
May 24, 2022, midnight 7.0 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (29) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
May 24, 2022, midnight 7.0 ppb (7) 0.0 ppb (0) 7.2 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (29) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
May 24, 2022, midnight 7.0 ppb (7) 0.0 ppb (0) 7.2 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (29) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
May 23, 2022, 11 p.m. 7.0 ppb (7) 0.0 ppb (0) 7.2 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 32.0 ppb (30) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
May 23, 2022, 11 p.m. 7.0 ppb (7) 0.0 ppb (0) 7.2 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 32.0 ppb (30) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
May 23, 2022, 8 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.6 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (34) 0.12 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
May 23, 2022, 7 p.m. 6.0 ppb (6) 2.0 ppb (2) 7.3 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (2) 35.0 ppb (33) 0.1 ppb (2) N/A 4.0 μg/m3 (17) 33.0
 
May 23, 2022, 6 p.m. 7.0 ppb (7) 3.0 ppb (3) 7.8 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
May 23, 2022, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (2) 33.0 ppb (31) 0.08 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
May 23, 2022, 2 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.4 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.08 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
May 23, 2022, 11 a.m. 4.0 ppb (4) 1.0 ppb (1) 5.7 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (2) N/A 0.27 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
May 23, 2022, 10 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.6 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.06 ppb (2) N/A 3.0 μg/m3 (13) 27.0
 
May 23, 2022, 10 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.6 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.06 ppb (2) N/A 3.0 μg/m3 (13) 27.0
 
May 23, 2022, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) 2.8 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) 0.05 ppb (2) N/A 2.0 μg/m3 (9) 27.0
 
May 23, 2022, 3 a.m. 6.0 ppb (6) 0.0 ppb (0) 9.1 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (35) 0.03 ppb (0) N/A 7.0 μg/m3 (30) 35.0
 
May 23, 2022, 2 a.m. 9.0 ppb (9) 0.0 ppb (0) 12.2 ppb (12) 9.0 ppb (9) N/A 0.0 ppb (0) 38.0 ppb (36) 0.05 ppb (2) N/A 6.0 μg/m3 (25) 36.0
 
May 23, 2022, 1 a.m. 7.0 ppb (7) 0.0 ppb (0) 9.4 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 47.0 ppb (44) 0.05 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
May 23, 2022, midnight 5.0 ppb (5) -1.0 ppb (0) 7.5 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 51.0 ppb (48) 0.16 ppb (3) N/A 15.0 μg/m3 (58) 58.0
 
May 22, 2022, 11 p.m. 4.0 ppb (4) -1.0 ppb (0) 6.9 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (2) 49.0 ppb (46) 0.17 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
May 22, 2022, 9 p.m. 4.0 ppb (4) 0.0 ppb (0) 6.1 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 53.0 ppb (50) 0.11 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
May 22, 2022, 8 p.m. 4.0 ppb (4) 0.0 ppb (0) 6.5 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (2) 58.0 ppb (61) 0.09 ppb (2) N/A 13.0 μg/m3 (53) 61.0
 
May 22, 2022, 7 p.m. 3.0 ppb (3) 0.0 ppb (0) 5.6 ppb (6) 3.0 ppb (3) N/A 1.0 ppb (2) 57.0 ppb (58) 0.05 ppb (2) N/A 13.0 μg/m3 (53) 58.0
 
May 22, 2022, 6 p.m. 6.0 ppb (6) 0.0 ppb (0) 8.8 ppb (9) 5.0 ppb (5) N/A 1.0 ppb (2) 51.0 ppb (48) 0.08 ppb (2) N/A 13.0 μg/m3 (53) 53.0
 
May 22, 2022, 5 p.m. 15.0 ppb (15) 3.0 ppb (3) 19.3 ppb (19) 12.0 ppb (12) N/A 1.0 ppb (2) 36.0 ppb (34) 0.08 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
May 22, 2022, 4 p.m. 12.0 ppb (12) 3.0 ppb (3) 15.7 ppb (15) 9.0 ppb (9) N/A 1.0 ppb (2) 37.0 ppb (35) 0.06 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
May 22, 2022, 3 p.m. 9.0 ppb (9) 2.0 ppb (2) 11.1 ppb (11) 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) 0.08 ppb (2) N/A N/A 37.0
 
May 22, 2022, 2 p.m. 15.0 ppb (15) 4.0 ppb (4) 18.5 ppb (18) 11.0 ppb (11) N/A 1.0 ppb (2) 29.0 ppb (27) 0.13 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
May 22, 2022, 1 p.m. 22.0 ppb (21) 7.0 ppb (7) 27.5 ppb (26) 15.0 ppb (15) N/A 1.0 ppb (2) 22.0 ppb (21) 0.11 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
May 22, 2022, 1 p.m. 22.0 ppb (21) 7.0 ppb (7) 27.5 ppb (26) 15.0 ppb (15) N/A 1.0 ppb (2) 22.0 ppb (21) 0.11 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
May 22, 2022, noon 8.0 ppb (8) 2.0 ppb (2) 10.5 ppb (10) 7.0 ppb (7) N/A 0.0 ppb (0) 28.0 ppb (26) 0.05 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
May 22, 2022, 11 a.m. 9.0 ppb (9) 1.0 ppb (1) 12.0 ppb (12) 8.0 ppb (8) N/A 1.0 ppb (2) 25.0 ppb (24) 0.04 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
May 22, 2022, 10 a.m. 14.0 ppb (14) 2.0 ppb (2) 15.8 ppb (15) 12.0 ppb (12) N/A 0.0 ppb (0) 19.0 ppb (18) 0.08 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
May 22, 2022, 9 a.m. 10.0 ppb (10) 0.0 ppb (0) 12.8 ppb (13) 10.0 ppb (10) N/A 0.0 ppb (0) 18.0 ppb (17) 0.15 ppb (2) N/A 17.0 μg/m3 (62) 62.0
 
May 22, 2022, 8 a.m. 11.0 ppb (11) 0.0 ppb (0) 12.7 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 20.0 ppb (19) 0.18 ppb (3) N/A 17.0 μg/m3 (62) 62.0
 
May 22, 2022, 7 a.m. 6.0 ppb (6) 0.0 ppb (0) 8.1 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (27) 0.14 ppb (2) N/A 17.0 μg/m3 (62) 62.0
 
May 22, 2022, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) 8.1 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 16.0 μg/m3 (60) 60.0
 
May 22, 2022, 3 a.m. 6.0 ppb (6) -1.0 ppb (0) 8.8 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A 15.0 μg/m3 (58) 58.0
 
May 22, 2022, 2 a.m. 28.0 ppb (27) 5.0 ppb (5) 25.6 ppb (25) 23.0 ppb (22) N/A 1.0 ppb (2) 18.0 ppb (17) 0.29 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
May 22, 2022, 1 a.m. 41.0 ppb (39) 3.0 ppb (3) 48.7 ppb (46) 38.0 ppb (36) N/A 1.0 ppb (2) 5.0 ppb (5) 0.41 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
May 22, 2022, midnight 41.0 ppb (39) 3.0 ppb (3) 50.1 ppb (48) 38.0 ppb (36) N/A 1.0 ppb (2) 7.0 ppb (7) 0.48 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
May 21, 2022, 11 p.m. 31.0 ppb (30) 2.0 ppb (2) 37.3 ppb (36) 29.0 ppb (28) N/A 1.0 ppb (2) 17.0 ppb (16) 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
May 21, 2022, 10 p.m. 23.0 ppb (22) 2.0 ppb (2) 28.2 ppb (27) 21.0 ppb (20) N/A 1.0 ppb (2) 31.0 ppb (29) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 21, 2022, 9 p.m. 16.0 ppb (16) 2.0 ppb (2) 20.8 ppb (20) 15.0 ppb (15) N/A 1.0 ppb (2) 46.0 ppb (43) 0.16 ppb (3) N/A 10.0 μg/m3 (42) 43.0
 
May 21, 2022, 8 p.m. 12.0 ppb (12) 2.0 ppb (2) 16.3 ppb (16) 11.0 ppb (11) N/A 1.0 ppb (2) 47.0 ppb (44) 0.17 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 21, 2022, 7 p.m. 13.0 ppb (13) 2.0 ppb (2) 17.6 ppb (17) 11.0 ppb (11) N/A 1.0 ppb (2) 46.0 ppb (43) 0.2 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 21, 2022, 6 p.m. 13.0 ppb (13) 2.0 ppb (2) 17.0 ppb (17) 11.0 ppb (11) N/A 0.0 ppb (0) 40.0 ppb (38) 0.22 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 21, 2022, 5 p.m. 8.0 ppb (8) 1.0 ppb (1) 11.6 ppb (11) 7.0 ppb (7) N/A 1.0 ppb (2) 38.0 ppb (36) 0.16 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 21, 2022, 4 p.m. 11.0 ppb (11) 3.0 ppb (3) 13.5 ppb (13) 8.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (30) 0.16 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 21, 2022, 3 p.m. 26.0 ppb (25) 8.0 ppb (8) 30.7 ppb (29) 18.0 ppb (17) N/A 1.0 ppb (2) 22.0 ppb (21) 0.23 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 21, 2022, 2 p.m. 37.0 ppb (35) 12.0 ppb (12) 43.5 ppb (42) 25.0 ppb (24) N/A 1.0 ppb (2) 14.0 ppb (13) 0.28 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
May 21, 2022, 1 p.m. 23.0 ppb (22) 5.0 ppb (5) 26.8 ppb (26) 18.0 ppb (17) N/A 1.0 ppb (2) 17.0 ppb (16) 0.21 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 21, 2022, 1 p.m. 23.0 ppb (22) 5.0 ppb (5) 26.8 ppb (26) 18.0 ppb (17) N/A 1.0 ppb (2) 17.0 ppb (16) 0.21 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 21, 2022, noon 35.0 ppb (34) 10.0 ppb (10) 40.6 ppb (39) 25.0 ppb (24) N/A 1.0 ppb (2) 10.0 ppb (10) 0.27 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
May 21, 2022, 10 a.m. 63.0 ppb (61) 26.0 ppb (25) 73.0 ppb (72) 38.0 ppb (36) N/A 1.0 ppb (2) 1.0 ppb (1) 0.13 ppb (2) N/A 10.0 μg/m3 (42) 72.0
 
May 21, 2022, 9 a.m. 42.0 ppb (40) 8.0 ppb (8) 49.9 ppb (48) 35.0 ppb (34) N/A 0.0 ppb (0) 2.0 ppb (2) 0.13 ppb (2) N/A 10.0 μg/m3 (42) 48.0
 
May 21, 2022, 8 a.m. 30.0 ppb (29) 4.0 ppb (4) 34.4 ppb (33) 26.0 ppb (25) N/A 0.0 ppb (0) 14.0 ppb (13) 0.11 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 21, 2022, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) 5.2 ppb (5) 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.09 ppb (2) N/A 7.0 μg/m3 (30) 39.0
 
May 21, 2022, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) 5.0 ppb (5) 4.0 ppb (4) N/A N/A 45.0 ppb (42) 0.13 ppb (2) N/A 8.0 μg/m3 (34) 42.0
 
May 21, 2022, 2 a.m. 5.0 ppb (5) 0.0 ppb (0) 6.5 ppb (7) 5.0 ppb (5) N/A N/A 44.0 ppb (41) 0.12 ppb (2) N/A 8.0 μg/m3 (34) 41.0
 
May 21, 2022, 1 a.m. 5.0 ppb (5) 0.0 ppb (0) 6.8 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (46) 0.14 ppb (2) N/A 10.0 μg/m3 (42) 46.0
 
May 21, 2022, midnight 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 50.0 ppb (47) 0.2 ppb (3) N/A 10.0 μg/m3 (42) 47.0
 
May 21, 2022, midnight 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 50.0 ppb (47) 0.2 ppb (3) N/A 10.0 μg/m3 (42) 47.0
 
May 20, 2022, 11 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 51.0 ppb (48) 0.22 ppb (3) N/A 10.0 μg/m3 (42) 48.0
 
May 20, 2022, 10 p.m. 22.0 ppb (21) 3.0 ppb (3) 16.7 ppb (16) 19.0 ppb (18) N/A 1.0 ppb (2) 31.0 ppb (29) 0.26 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
May 20, 2022, 9 p.m. 14.0 ppb (14) 3.0 ppb (3) 16.7 ppb (16) 11.0 ppb (11) N/A 1.0 ppb (2) 33.0 ppb (31) 0.16 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 20, 2022, 7 p.m. 16.0 ppb (16) 5.0 ppb (5) 18.8 ppb (18) 11.0 ppb (11) N/A 1.0 ppb (2) 31.0 ppb (29) 0.07 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
May 20, 2022, 6 p.m. 25.0 ppb (24) 9.0 ppb (9) 27.3 ppb (26) 15.0 ppb (15) N/A 1.0 ppb (2) 27.0 ppb (25) 0.09 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
May 20, 2022, 5 p.m. 12.0 ppb (12) 4.0 ppb (4) 15.7 ppb (15) 8.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 30.0
 
May 20, 2022, 4 p.m. 8.0 ppb (8) 2.0 ppb (2) 9.8 ppb (10) 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (31) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
May 20, 2022, 3 p.m. 7.0 ppb (7) 2.0 ppb (2) 8.1 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (30) 0.07 ppb (2) N/A 5.0 μg/m3 (21) 30.0
 
May 20, 2022, 2 p.m. 8.0 ppb (8) 2.0 ppb (2) 9.5 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.09 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
May 20, 2022, 1 p.m. 7.0 ppb (7) 1.0 ppb (1) 9.3 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.09 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
May 20, 2022, 11 a.m. 14.0 ppb (14) 2.0 ppb (2) 16.8 ppb (16) 11.0 ppb (11) N/A 0.0 ppb (0) 22.0 ppb (21) 0.09 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 20, 2022, 10 a.m. 20.0 ppb (19) 5.0 ppb (5) 22.3 ppb (22) 15.0 ppb (15) N/A 0.0 ppb (0) 9.0 ppb (9) 0.13 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
May 20, 2022, 9 a.m. 15.0 ppb (15) 3.0 ppb (3) 16.9 ppb (16) 12.0 ppb (12) N/A 0.0 ppb (0) 7.0 ppb (7) 0.13 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
May 20, 2022, 8 a.m. 17.0 ppb (17) 4.0 ppb (4) 20.5 ppb (20) 12.0 ppb (12) N/A 0.0 ppb (0) 9.0 ppb (9) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2022, 7 a.m. 7.0 ppb (7) 0.0 ppb (0) 9.3 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 16.0 ppb (15) 0.1 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2022, 6 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.9 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (14) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2022, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) 8.4 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (16) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2022, 4 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.5 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (21) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
May 20, 2022, 3 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.1 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (25) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
May 20, 2022, 2 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.9 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (29) 0.13 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
May 20, 2022, 1 a.m. 8.0 ppb (8) 0.0 ppb (0) 9.5 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 27.0
 
May 20, 2022, 1 a.m. 8.0 ppb (8) 0.0 ppb (0) 9.5 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 27.0
 
May 20, 2022, midnight 9.0 ppb (9) 1.0 ppb (1) 10.7 ppb (11) 9.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
May 20, 2022, midnight 9.0 ppb (9) 1.0 ppb (1) 10.7 ppb (11) 9.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
May 19, 2022, 11 p.m. 8.0 ppb (8) 0.0 ppb (0) 10.5 ppb (10) 8.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
May 19, 2022, 10 p.m. 9.0 ppb (9) 1.0 ppb (1) 10.6 ppb (10) 8.0 ppb (8) N/A 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
May 19, 2022, 9 p.m. 7.0 ppb (7) 1.0 ppb (1) 8.7 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
May 19, 2022, 8 p.m. 8.0 ppb (8) 1.0 ppb (1) 9.4 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 41.0 ppb (38) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 38.0
 
May 19, 2022, 7 p.m. 8.0 ppb (8) 1.0 ppb (1) 9.0 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.11 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2022, 7 p.m. 8.0 ppb (8) 1.0 ppb (1) 9.0 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 41.0 ppb (38) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
May 19, 2022, 4 p.m. 9.0 ppb (9) 1.0 ppb (1) 9.3 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 41.0 ppb (38) 0.12 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
May 19, 2022, 2 p.m. 15.0 ppb (15) 2.0 ppb (2) 17.1 ppb (17) 14.0 ppb (14) N/A 0.0 ppb (0) 40.0 ppb (38) 0.12 ppb (2) N/A 7.0 μg/m3 (30) 38.0
 
May 19, 2022, 6 a.m. 22.0 ppb (21) 0.0 ppb (0) 24.3 ppb (23) 21.0 ppb (20) N/A 0.0 ppb (0) 27.0 ppb (25) 0.18 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
May 19, 2022, 5 a.m. 36.0 ppb (34) 1.0 ppb (1) 40.7 ppb (39) 35.0 ppb (34) N/A 1.0 ppb (2) 10.0 ppb (10) 0.4 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
May 19, 2022, 4 a.m. 35.0 ppb (34) 1.0 ppb (1) 40.2 ppb (38) 34.0 ppb (33) N/A 1.0 ppb (2) 11.0 ppb (11) 0.47 ppb (6) N/A 28.0 μg/m3 (85) 85.0
 
May 19, 2022, 3 a.m. 27.0 ppb (26) 0.0 ppb (0) 30.4 ppb (29) 26.0 ppb (25) N/A 0.0 ppb (0) 21.0 ppb (20) 0.46 ppb (6) N/A 34.0 μg/m3 (98) 98.0
 
May 19, 2022, 2 a.m. 23.0 ppb (22) 0.0 ppb (0) 25.1 ppb (24) 22.0 ppb (21) N/A 0.0 ppb (0) 29.0 ppb (27) 0.32 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
May 19, 2022, 1 a.m. 37.0 ppb (35) 8.0 ppb (8) 30.5 ppb (29) 28.0 ppb (27) N/A 1.0 ppb (2) 27.0 ppb (25) 0.31 ppb (4) N/A 8.0 μg/m3 (34) 35.0
 
May 18, 2022, 11 p.m. 5.0 ppb (5) 0.0 ppb (0) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 52.0 ppb (49) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 49.0
 
May 18, 2022, 10 p.m. 5.0 ppb (5) 0.0 ppb (0) 6.1 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (50) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 50.0
 
May 18, 2022, 9 p.m. 3.0 ppb (3) 0.0 ppb (0) 4.5 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 55.0 ppb (51) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 51.0
 
May 18, 2022, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.3 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 56.0 ppb (55) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 55.0
 
May 18, 2022, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.6 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 56.0 ppb (55) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 55.0
 
May 18, 2022, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.5 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 54.0 ppb (50) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 50.0
 
May 18, 2022, 4 p.m. 6.0 ppb (6) 1.0 ppb (1) 6.8 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 51.0 ppb (48) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 48.0
 
May 18, 2022, 4 p.m. 6.0 ppb (6) 1.0 ppb (1) 6.8 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 51.0 ppb (48) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 48.0
 
May 18, 2022, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.0 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (46) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 46.0
 
May 18, 2022, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.0 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (46) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 46.0
 
May 18, 2022, 2 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.7 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 42.0
 
May 18, 2022, 2 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.7 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 42.0
 
May 18, 2022, 1 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.1 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 39.0
 
May 18, 2022, 1 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.1 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 39.0
 
May 18, 2022, noon 4.0 ppb (4) 1.0 ppb (1) 4.7 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
May 18, 2022, noon 4.0 ppb (4) 1.0 ppb (1) 4.7 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
May 18, 2022, 11 a.m. 6.0 ppb (6) 1.0 ppb (1) 7.0 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 30.0
 
May 18, 2022, 10 a.m. 10.0 ppb (10) 2.0 ppb (2) 12.1 ppb (12) 8.0 ppb (8) N/A 0.0 ppb (0) 27.0 ppb (25) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
May 18, 2022, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) 4.4 ppb (5) 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 29.0