AQSQID: 440070030

Site Name: Near Road

Location: Providence, RI

Reporting: True, Located: True

Current AQI: 33.0

Providence RI, US: 41.829495, -71.417457

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 19, 2019, 8 p.m. 28240.0 ppb (7064) 11.6 ppb (11) N/A 17.0 ppb (16) N/A N/A N/A 0.48 ppb (5) N/A 7.9 μg/m3 (33) 33.0
 
May 19, 2019, 7 p.m. 28490.0 ppb (7127) 14.9 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A 0.55 ppb (6) N/A 3.0 μg/m3 (12) 14.0
 
May 19, 2019, 6 p.m. 28080.0 ppb (7024) 17.7 ppb (16) N/A 10.0 ppb (9) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2019, 5 p.m. 13440.0 ppb (3355) 7.2 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 4 p.m. 15740.0 ppb (3931) 8.6 ppb (8) N/A 7.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 3 p.m. 21480.0 ppb (5370) 11.0 ppb (10) N/A 10.0 ppb (9) N/A N/A N/A 0.42 ppb (5) N/A 7.9 μg/m3 (33) 33.0
 
May 19, 2019, 2 p.m. 21200.0 ppb (5300) 9.8 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A 0.38 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 1 p.m. 20950.0 ppb (5237) 13.1 ppb (12) N/A 8.0 ppb (7) N/A N/A N/A 0.36 ppb (4) N/A 5.9 μg/m3 (25) 25.0
 
May 19, 2019, noon 23800.0 ppb (5951) 12.8 ppb (12) N/A 11.0 ppb (10) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2019, 11 a.m. 20340.0 ppb (5084) 11.9 ppb (11) N/A 8.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 10 a.m. 22620.0 ppb (5656) 10.7 ppb (10) N/A 12.0 ppb (11) N/A N/A N/A 0.33 ppb (4) N/A 5.9 μg/m3 (25) 25.0
 
May 19, 2019, 9 a.m. 13000.0 ppb (3245) 6.2 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2019, 8 a.m. 12240.0 ppb (3054) 5.3 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 7 a.m. 12510.0 ppb (3122) 5.2 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 6 a.m. 18640.0 ppb (4658) 8.6 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.58 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 5 a.m. 19610.0 ppb (4901) 11.6 ppb (11) N/A 8.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
May 19, 2019, 4 a.m. 18910.0 ppb (4726) 9.5 ppb (9) N/A 9.0 ppb (8) N/A N/A N/A 0.38 ppb (4) N/A 12.9 μg/m3 (52) 52.0
 
May 19, 2019, 3 a.m. 24480.0 ppb (6122) 11.5 ppb (11) N/A 13.0 ppb (12) N/A N/A N/A 0.52 ppb (6) N/A 9.9 μg/m3 (41) 41.0
 
May 19, 2019, 2 a.m. 24450.0 ppb (6114) 13.8 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A 0.48 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
May 19, 2019, 1 a.m. 18230.0 ppb (4555) 7.5 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.38 ppb (4) N/A 10.9 μg/m3 (45) 45.0
 
May 19, 2019, midnight 21060.0 ppb (5265) 8.5 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.4 ppb (4) N/A 5.9 μg/m3 (25) 25.0
 
May 18, 2019, 11 p.m. 16800.0 ppb (4197) 5.1 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2019, 10 p.m. 10470.0 ppb (2611) 3.8 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2019, 9 p.m. 10160.0 ppb (2533) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
May 18, 2019, 8 p.m. 16200.0 ppb (4047) 6.6 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.32 ppb (4) N/A 3.9 μg/m3 (16) 16.0
 
May 18, 2019, 7 p.m. 28230.0 ppb (7062) 14.3 ppb (13) N/A 14.0 ppb (13) N/A N/A N/A 0.46 ppb (5) N/A 0.9 μg/m3 (4) 13.0
 
May 18, 2019, 6 p.m. 36700.0 ppb (9184) 18.9 ppb (18) N/A 18.0 ppb (17) N/A N/A N/A 0.5 ppb (6) N/A 0.0 μg/m3 (0) 18.0
 
May 18, 2019, 5 p.m. 25210.0 ppb (6305) 13.6 ppb (13) N/A 12.0 ppb (11) N/A N/A N/A 0.45 ppb (5) N/A 2.0 μg/m3 (8) 13.0
 
May 18, 2019, 4 p.m. 35420.0 ppb (8864) 20.7 ppb (19) N/A 15.0 ppb (14) N/A N/A N/A 0.49 ppb (5) N/A 2.9 μg/m3 (12) 19.0
 
May 18, 2019, 3 p.m. 37700.0 ppb (9435) 26.0 ppb (24) N/A 12.0 ppb (11) N/A N/A N/A 0.53 ppb (6) N/A 1.0 μg/m3 (4) 24.0
 
May 18, 2019, 2 p.m. 39660.0 ppb (9926) 26.4 ppb (24) N/A 13.0 ppb (12) N/A N/A N/A 0.46 ppb (5) N/A 2.0 μg/m3 (8) 24.0
 
May 18, 2019, 1 p.m. 37140.0 ppb (9295) 25.8 ppb (24) N/A 11.0 ppb (10) N/A N/A N/A 0.45 ppb (5) N/A 4.9 μg/m3 (20) 24.0
 
May 18, 2019, noon 42410.0 ppb (10616) 28.1 ppb (26) N/A 14.0 ppb (13) N/A N/A N/A 0.48 ppb (5) N/A 4.0 μg/m3 (17) 26.0
 
May 18, 2019, 11 a.m. 48190.0 ppb (12064) 37.0 ppb (34) N/A 11.0 ppb (10) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 34.0
 
May 18, 2019, 10 a.m. 57280.0 ppb (14342) 41.2 ppb (38) N/A 16.0 ppb (15) N/A N/A N/A 0.49 ppb (5) N/A 7.9 μg/m3 (33) 38.0
 
May 18, 2019, 9 a.m. 45950.0 ppb (11503) 29.7 ppb (28) N/A 16.0 ppb (15) N/A N/A N/A 0.46 ppb (5) N/A 5.0 μg/m3 (21) 28.0
 
May 18, 2019, 8 a.m. 22130.0 ppb (5533) 11.7 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 18, 2019, 7 a.m. 14.1 ppb (13) 7.8 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 18, 2019, 6 a.m. 26680.0 ppb (6673) 12.4 ppb (11) N/A 14.0 ppb (13) N/A N/A N/A 0.54 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
May 18, 2019, 5 a.m. 19020.0 ppb (4753) 11.0 ppb (10) N/A 8.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
May 18, 2019, 4 a.m. 29180.0 ppb (7300) 12.9 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A 0.42 ppb (5) N/A 21.0 μg/m3 (69) 69.0
 
May 18, 2019, 3 a.m. 70420.0 ppb (17636) 32.6 ppb (30) N/A 38.0 ppb (35) N/A N/A N/A 1.21 ppb (13) N/A 21.9 μg/m3 (71) 71.0
 
May 18, 2019, 2 a.m. 60570.0 ppb (15167) 28.0 ppb (26) N/A 33.0 ppb (31) N/A N/A N/A 0.96 ppb (11) N/A 18.0 μg/m3 (63) 63.0
 
May 18, 2019, 1 a.m. 37520.0 ppb (9390) 12.2 ppb (11) N/A 25.0 ppb (23) N/A N/A N/A 0.62 ppb (7) N/A 21.0 μg/m3 (69) 69.0
 
May 18, 2019, midnight 34760.0 ppb (8698) 13.0 ppb (12) N/A 22.0 ppb (20) N/A N/A N/A 0.58 ppb (6) N/A 20.9 μg/m3 (69) 69.0
 
May 17, 2019, 11 p.m. 28270.0 ppb (7072) 6.0 ppb (6) N/A 22.0 ppb (20) N/A N/A N/A 0.42 ppb (5) N/A 18.9 μg/m3 (65) 65.0
 
May 17, 2019, 10 p.m. 25440.0 ppb (6362) 6.8 ppb (6) N/A 19.0 ppb (18) N/A N/A N/A 0.41 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
May 17, 2019, 9 p.m. 54370.0 ppb (13613) 21.2 ppb (20) N/A 33.0 ppb (31) N/A N/A N/A 0.8 ppb (9) N/A 18.9 μg/m3 (65) 65.0
 
May 17, 2019, 8 p.m. 42650.0 ppb (10676) 20.4 ppb (19) N/A 22.0 ppb (20) N/A N/A N/A 0.7 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
May 17, 2019, 7 p.m. 50020.0 ppb (12523) 25.7 ppb (24) N/A 24.0 ppb (22) N/A N/A N/A 0.64 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
May 17, 2019, 6 p.m. 49170.0 ppb (12310) 23.3 ppb (22) N/A 26.0 ppb (24) N/A N/A N/A 0.55 ppb (6) N/A 15.9 μg/m3 (58) 58.0
 
May 17, 2019, 5 p.m. 44970.0 ppb (11257) 20.3 ppb (19) N/A 25.0 ppb (23) N/A N/A N/A 0.5 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
May 17, 2019, 4 p.m. 27650.0 ppb (6916) 9.4 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A 0.36 ppb (4) N/A 19.6 μg/m3 (66) 66.0
 
May 17, 2019, 3 p.m. 42690.0 ppb (10686) 14.1 ppb (13) N/A 29.0 ppb (27) N/A N/A N/A 0.54 ppb (6) N/A N/A 27.0
 
May 17, 2019, 2 p.m. 37300.0 ppb (9335) 14.0 ppb (13) N/A 23.0 ppb (21) N/A N/A N/A 0.4 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
May 17, 2019, 1 p.m. 27770.0 ppb (6946) 8.2 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.33 ppb (4) N/A 13.9 μg/m3 (54) 54.0
 
May 17, 2019, noon 52910.0 ppb (13247) 29.5 ppb (27) N/A 23.0 ppb (21) N/A N/A N/A 0.51 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
May 17, 2019, 11 a.m. 68410.0 ppb (17132) 36.8 ppb (34) N/A 32.0 ppb (30) N/A N/A N/A 0.62 ppb (7) N/A 20.9 μg/m3 (69) 69.0
 
May 17, 2019, 10 a.m. 89420.0 ppb (22397) 60.2 ppb (57) N/A 29.0 ppb (27) N/A N/A N/A 0.77 ppb (9) N/A 17.9 μg/m3 (63) 63.0
 
May 17, 2019, 9 a.m. 79670.0 ppb (19954) 52.5 ppb (49) N/A 27.0 ppb (25) N/A N/A N/A 0.65 ppb (7) N/A 15.9 μg/m3 (58) 58.0
 
May 17, 2019, 8 a.m. 63230.0 ppb (15834) 41.5 ppb (38) N/A 22.0 ppb (20) N/A N/A N/A 0.54 ppb (6) N/A 14.9 μg/m3 (56) 56.0
 
May 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
May 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.9 μg/m3 (58) 58.0
 
May 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
May 17, 2019, 4 a.m. 44280.0 ppb (11084) 14.3 ppb (13) N/A 30.0 ppb (28) N/A N/A N/A 0.52 ppb (6) N/A 13.9 μg/m3 (54) 54.0
 
May 17, 2019, 3 a.m. 49620.0 ppb (12423) 16.7 ppb (15) N/A 33.0 ppb (31) N/A N/A N/A 0.69 ppb (8) N/A 12.9 μg/m3 (52) 52.0
 
May 17, 2019, 2 a.m. 23190.0 ppb (5798) 3.6 ppb (3) N/A 20.0 ppb (19) N/A N/A N/A 0.37 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
May 17, 2019, 1 a.m. 17690.0 ppb (4420) 4.6 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.37 ppb (4) N/A 11.9 μg/m3 (50) 50.0
 
May 17, 2019, midnight 27350.0 ppb (6841) 9.3 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A 0.51 ppb (6) N/A 6.9 μg/m3 (29) 29.0
 
May 16, 2019, 11 p.m. 29100.0 ppb (7280) 10.1 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
May 16, 2019, 10 p.m. 21380.0 ppb (5345) 7.4 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.38 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 16, 2019, 9 p.m. 46550.0 ppb (11653) 27.0 ppb (25) N/A 20.0 ppb (19) N/A N/A N/A 0.67 ppb (7) N/A 7.9 μg/m3 (33) 33.0
 
May 16, 2019, 8 p.m. 40340.0 ppb (10097) 22.7 ppb (21) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (5) N/A 4.0 μg/m3 (17) 21.0
 
May 16, 2019, 7 p.m. 51720.0 ppb (12949) 29.9 ppb (28) N/A 22.0 ppb (20) N/A N/A N/A 0.58 ppb (6) N/A 4.0 μg/m3 (17) 28.0
 
May 16, 2019, 6 p.m. 59550.0 ppb (14911) 40.1 ppb (37) N/A 19.0 ppb (18) N/A N/A N/A 0.52 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
May 16, 2019, 5 p.m. 62530.0 ppb (15658) 41.9 ppb (39) N/A 21.0 ppb (19) N/A N/A N/A 0.56 ppb (6) N/A 13.9 μg/m3 (54) 54.0
 
May 16, 2019, 4 p.m. 62680.0 ppb (15696) 42.9 ppb (40) N/A 20.0 ppb (19) N/A N/A N/A 0.63 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
May 16, 2019, 3 p.m. 52000.0 ppb (13019) 30.0 ppb (28) 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
 
May 16, 2019, 2 p.m. 82190.0 ppb (20585) 52.4 ppb (49) N/A 30.0 ppb (28) N/A N/A N/A 0.65 ppb (7) N/A 8.0 μg/m3 (33) 49.0
 
May 16, 2019, 1 p.m. 65130.0 ppb (16310) 42.6 ppb (39) N/A 22.0 ppb (20) N/A N/A N/A 0.54 ppb (6) N/A 8.0 μg/m3 (33) 39.0
 
May 16, 2019, noon 75640.0 ppb (18944) 50.3 ppb (47) N/A 25.0 ppb (23) N/A N/A N/A 0.69 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
May 16, 2019, 11 a.m. N/A 82.9 ppb (81) N/A 28.0 ppb (26) N/A N/A N/A 0.98 ppb (11) N/A 12.0 μg/m3 (50) 81.0
 
May 16, 2019, 10 a.m. 97090.0 ppb (24320) 71.8 ppb (69) N/A 25.0 ppb (23) N/A N/A N/A 0.84 ppb (9) N/A 12.9 μg/m3 (52) 69.0
 
May 16, 2019, 9 a.m. N/A 82.3 ppb (80) N/A 23.0 ppb (21) N/A N/A N/A 0.79 ppb (9) N/A 10.0 μg/m3 (42) 80.0
 
May 16, 2019, 8 a.m. 73000.0 ppb (18282) 48.5 ppb (45) N/A 24.0 ppb (22) N/A N/A N/A 0.52 ppb (6) N/A 9.9 μg/m3 (41) 45.0
 
May 16, 2019, 7 a.m. 77700.0 ppb (19460) 46.6 ppb (43) N/A 31.0 ppb (29) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (12) 43.0
 
May 16, 2019, 6 a.m. 58990.0 ppb (14771) 29.1 ppb (27) N/A 30.0 ppb (28) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 28.0
 
May 16, 2019, 5 a.m. 26510.0 ppb (6631) 9.8 ppb (9) N/A 17.0 ppb (16) N/A N/A N/A 0.39 ppb (4) N/A 3.9 μg/m3 (16) 16.0
 
May 16, 2019, 4 a.m. 21180.0 ppb (5295) 8.8 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 16, 2019, 3 a.m. 22540.0 ppb (5636) 7.5 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 16, 2019, 2 a.m. 19940.0 ppb (4984) 5.0 ppb (5) N/A 15.0 ppb (14) N/A N/A N/A 0.3 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
May 16, 2019, 1 a.m. 31790.0 ppb (7954) 13.4 ppb (12) N/A 18.0 ppb (17) N/A N/A N/A 0.4 ppb (4) N/A 4.9 μg/m3 (20) 20.0
 
May 16, 2019, midnight 40530.0 ppb (10144) 16.5 ppb (15) N/A 24.0 ppb (22) N/A N/A N/A 0.47 ppb (5) N/A 3.0 μg/m3 (12) 22.0
 
May 15, 2019, 11 p.m. 45290.0 ppb (11337) 21.6 ppb (20) N/A 24.0 ppb (22) N/A N/A N/A 0.61 ppb (7) N/A 4.0 μg/m3 (17) 22.0
 
May 15, 2019, 10 p.m. 55150.0 ppb (13809) 34.6 ppb (32) N/A 21.0 ppb (19) N/A N/A N/A 0.61 ppb (7) N/A 6.0 μg/m3 (25) 32.0
 
May 15, 2019, 9 p.m. 41590.0 ppb (10410) 27.8 ppb (26) N/A 14.0 ppb (13) N/A N/A N/A 0.55 ppb (6) N/A 5.9 μg/m3 (25) 26.0
 
May 15, 2019, 8 p.m. 51920.0 ppb (12999) 34.2 ppb (32) N/A 18.0 ppb (17) N/A N/A N/A 0.58 ppb (6) N/A 3.0 μg/m3 (12) 32.0
 
May 15, 2019, 7 p.m. 69330.0 ppb (17362) 46.7 ppb (43) N/A 23.0 ppb (21) N/A N/A N/A 0.65 ppb (7) N/A 3.0 μg/m3 (12) 43.0
 
May 15, 2019, 6 p.m. 63840.0 ppb (15986) 44.8 ppb (41) N/A 19.0 ppb (18) N/A N/A N/A 0.56 ppb (6) N/A 4.9 μg/m3 (20) 41.0
 
May 15, 2019, 5 p.m. 78150.0 ppb (19573) 59.9 ppb (56) N/A 18.0 ppb (17) N/A N/A N/A 0.58 ppb (6) N/A 3.0 μg/m3 (12) 56.0
 
May 15, 2019, 4 p.m. 68820.0 ppb (17235) 44.7 ppb (41) N/A 24.0 ppb (22) N/A N/A N/A 0.55 ppb (6) N/A 4.0 μg/m3 (17) 41.0
 
May 15, 2019, 3 p.m. 65680.0 ppb (16448) 44.7 ppb (41) N/A 21.0 ppb (19) N/A N/A N/A 0.5 ppb (6) N/A 5.9 μg/m3 (25) 41.0
 
May 15, 2019, 2 p.m. 63000.0 ppb (15776) 47.5 ppb (44) N/A 16.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 4.9 μg/m3 (20) 44.0
 
May 15, 2019, 1 p.m. 66070.0 ppb (16545) 52.8 ppb (49) N/A 13.0 ppb (12) N/A N/A N/A 0.57 ppb (6) N/A 3.9 μg/m3 (16) 49.0
 
May 15, 2019, noon 83910.0 ppb (21017) 66.3 ppb (63) N/A 18.0 ppb (17) N/A N/A N/A 0.69 ppb (8) N/A -2.0 μg/m3 (0) 63.0
 
May 15, 2019, 11 a.m. 109.6 ppb (102) 85.5 ppb (84) N/A 24.0 ppb (22) N/A N/A N/A 0.85 ppb (9) N/A N/A 84.0
 
May 15, 2019, 10 a.m. 128.4 ppb (105) 100.7 ppb (100) N/A 28.0 ppb (26) N/A N/A N/A 0.85 ppb (9) N/A -4.0 μg/m3 (0) 100.0
 
May 15, 2019, 9 a.m. 102.3 ppb (100) 74.4 ppb (72) N/A 28.0 ppb (26) N/A N/A N/A 0.7 ppb (8) N/A -1.0 μg/m3 (0) 72.0
 
May 15, 2019, 8 a.m. 46.7 ppb (43) 34.2 ppb (32) N/A 12.0 ppb (11) N/A N/A N/A 0.47 ppb (5) N/A N/A 32.0
 
May 15, 2019, 3 a.m. 40220.0 ppb (10067) 21.9 ppb (20) N/A 18.0 ppb (17) N/A N/A N/A 0.53 ppb (6) N/A 3.0 μg/m3 (12) 20.0
 
May 15, 2019, 2 a.m. 21560.0 ppb (5390) 8.6 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.37 ppb (4) N/A 3.9 μg/m3 (16) 16.0
 
May 15, 2019, 1 a.m. 12380.0 ppb (3089) 4.1 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2019, midnight 12900.0 ppb (3220) 4.2 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 2.9 μg/m3 (12) 12.0
 
May 14, 2019, 11 p.m. 12230.0 ppb (3052) 4.3 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
May 14, 2019, 10 p.m. 14420.0 ppb (3601) 6.0 ppb (6) 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
 
May 14, 2019, 9 p.m. 24.9 ppb (23) 11.3 ppb (10) N/A 14.0 ppb (13) N/A N/A N/A 0.38 ppb (4) N/A 2.0 μg/m3 (8) 13.0
 
May 14, 2019, 8 p.m. 32.0 ppb (30) 19.3 ppb (18) N/A 13.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 1.0 μg/m3 (4) 18.0
 
May 14, 2019, 7 p.m. 21.1 ppb (20) 12.1 ppb (11) N/A 9.0 ppb (8) N/A N/A N/A 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 14, 2019, 6 p.m. 42110.0 ppb (10540) 26.3 ppb (24) N/A 16.0 ppb (15) N/A N/A N/A 0.44 ppb (5) N/A 3.9 μg/m3 (16) 24.0
 
May 14, 2019, 5 p.m. 71790.0 ppb (17979) 53.0 ppb (49) N/A 19.0 ppb (18) N/A N/A N/A 0.56 ppb (6) N/A 2.9 μg/m3 (12) 49.0
 
May 14, 2019, 4 p.m. 72500.0 ppb (18157) 52.0 ppb (48) N/A 21.0 ppb (19) N/A N/A N/A 0.57 ppb (6) N/A 2.0 μg/m3 (8) 48.0
 
May 14, 2019, 3 p.m. 67.6 ppb (64) 45.0 ppb (42) N/A 23.0 ppb (21) N/A N/A N/A 0.57 ppb (6) N/A 2.0 μg/m3 (8) 42.0
 
May 14, 2019, 2 p.m. 62.2 ppb (59) 43.4 ppb (40) N/A 19.0 ppb (18) N/A N/A N/A 0.48 ppb (5) N/A 4.0 μg/m3 (17) 40.0
 
May 14, 2019, 1 p.m. 73.5 ppb (71) 54.6 ppb (51) N/A 19.0 ppb (18) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 51.0
 
May 14, 2019, noon 77.3 ppb (75) 53.7 ppb (50) N/A 24.0 ppb (22) N/A N/A N/A 0.58 ppb (6) N/A 5.0 μg/m3 (21) 50.0
 
May 14, 2019, 11 a.m. 74.2 ppb (71) 48.7 ppb (45) N/A 26.0 ppb (24) N/A N/A N/A 0.62 ppb (7) N/A 1.0 μg/m3 (4) 45.0
 
May 14, 2019, 10 a.m. 95.0 ppb (94) 67.1 ppb (64) N/A 28.0 ppb (26) N/A N/A N/A 0.66 ppb (7) N/A 0.0 μg/m3 (0) 64.0
 
May 14, 2019, 9 a.m. 73.1 ppb (70) 48.7 ppb (45) N/A 25.0 ppb (23) N/A N/A N/A 0.54 ppb (6) N/A 0.0 μg/m3 (0) 45.0
 
May 14, 2019, 8 a.m. 42.2 ppb (39) 25.0 ppb (23) N/A 17.0 ppb (16) N/A N/A N/A 0.29 ppb (3) N/A -1.0 μg/m3 (0) 23.0
 
May 14, 2019, 7 a.m. 38.5 ppb (36) 24.5 ppb (23) N/A 14.0 ppb (13) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 23.0
 
May 14, 2019, 6 a.m. 17.1 ppb (16) 5.2 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.17 ppb (2) N/A 0.0 μg/m3 (0) 11.0
 
May 14, 2019, 5 a.m. 10.5 ppb (10) 4.6 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 0.0 μg/m3 (0) 6.0
 
May 14, 2019, 4 a.m. 3920.0 ppb (969) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.12 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
May 14, 2019, 3 a.m. 4870.0 ppb (1207) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
May 14, 2019, 2 a.m. 4240.0 ppb (1049) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
May 14, 2019, 1 a.m. 6.3 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
May 14, 2019, midnight 13740.0 ppb (3430) 8.6 ppb (8) N/A 5.0 ppb (5) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 13, 2019, 11 p.m. 13030.0 ppb (3252) 6.2 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
May 13, 2019, 10 p.m. 10850.0 ppb (2706) 4.5 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
May 13, 2019, 9 p.m. 14940.0 ppb (3731) 7.1 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.28 ppb (3) N/A 2.9 μg/m3 (12) 12.0
 
May 13, 2019, 8 p.m. 20990.0 ppb (5247) 13.6 ppb (13) N/A 7.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 13.0
 
May 13, 2019, 7 p.m. 20010.0 ppb (5002) 14.7 ppb (14) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (3) N/A 3.0 μg/m3 (12) 14.0
 
May 13, 2019, 6 p.m. 26.5 ppb (25) 15.0 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A 0.3 ppb (3) N/A 3.0 μg/m3 (12) 14.0
 
May 13, 2019, 5 p.m. 20.3 ppb (19) 12.1 ppb (11) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
May 13, 2019, 4 p.m. 23630.0 ppb (5909) 11.8 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
May 13, 2019, 3 p.m. 16350.0 ppb (4084) 10.2 ppb (9) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 9.0
 
May 13, 2019, 2 p.m. 17.5 ppb (16) 12.7 ppb (12) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 12.0
 
May 13, 2019, 1 p.m. 17.9 ppb (17) 9.4 ppb (9) N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 1.0 μg/m3 (4) 9.0
 
May 13, 2019, noon 21580.0 ppb (5395) 10.2 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (4) 10.0
 
May 13, 2019, 11 a.m. 20070.0 ppb (5017) 13.6 ppb (13) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 13, 2019, 10 a.m. 26.6 ppb (25) 15.5 ppb (14) N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 13, 2019, 9 a.m. 13.7 ppb (13) 4.3 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 13, 2019, 8 a.m. 15.2 ppb (14) 2.9 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 13, 2019, 7 a.m. 20.4 ppb (19) 8.1 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
May 13, 2019, 6 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
 
May 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
May 13, 2019, 3 a.m. 18090.0 ppb (4520) 7.7 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.3 ppb (3) N/A 1.0 μg/m3 (4) 9.0
 
May 13, 2019, 2 a.m. 13070.0 ppb (3262) 7.7 ppb (7) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 7.0
 
May 13, 2019, 1 a.m. 11300.0 ppb (2819) 3.7 ppb (3) 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
 
May 13, 2019, midnight 14310.0 ppb (3573) 5.1 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.31 ppb (3) N/A 4.9 μg/m3 (20) 20.0
 
May 12, 2019, 11 p.m. 9740.0 ppb (2428) 3.9 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 2.9 μg/m3 (12) 12.0
 
May 12, 2019, 10 p.m. 13270.0 ppb (3312) 5.5 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.29 ppb (3) N/A 1.0 μg/m3 (4) 7.0
 
May 12, 2019, 9 p.m. 11700.0 ppb (2919) 5.0 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 2.9 μg/m3 (12) 12.0
 
May 12, 2019, 8 p.m. 13770.0 ppb (3438) 7.5 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 1.0 μg/m3 (4) 7.0
 
May 12, 2019, 7 p.m. 12790.0 ppb (3192) 5.9 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 12, 2019, 6 p.m. 9.6 ppb (9) 3.8 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 12, 2019, 5 p.m. 7790.0 ppb (1939) 3.2 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 12, 2019, 4 p.m. 6800.0 ppb (1691) 4.0 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.26 ppb (3) N/A 4.0 μg/m3 (17) 17.0