ID: 9745

AQSQID: 124000102210

Site Name: Trail Columbia Gardens Airport

Added: July 24, 2021, 5:40 a.m.

Updated: July 1, 2022, 6:27 a.m.

Location: Kootenay Boundary A (Hwy 22a), N/A

Reporting: True, Located: True

Current AQI: 2.0

Kootenay Boundary A (Hwy 22a) N/A, CA: 49.046405, -117.60711

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 1, 2022, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 3 a.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
July 1, 2022, 3 a.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
July 1, 2022, 3 a.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
July 1, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
July 1, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 5 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A N/A 9.0
 
June 30, 2022, 5 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A N/A 9.0
 
June 30, 2022, 5 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A N/A 9.0
 
June 30, 2022, 4 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A N/A 9.0
 
June 30, 2022, 4 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A N/A 9.0
 
June 30, 2022, 4 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A N/A 9.0
 
June 30, 2022, 4 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A N/A 9.0
 
June 30, 2022, 3 p.m. N/A N/A N/A N/A N/A 11.0 ppb (16) N/A N/A N/A N/A 16.0
 
June 30, 2022, 1 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A N/A 5.0
 
June 30, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 30, 2022, midnight N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 30, 2022, midnight N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 29, 2022, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 29, 2022, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 29, 2022, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 29, 2022, 10 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 29, 2022, 10 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 29, 2022, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 29, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 7 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 7 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 10 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 8 a.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
June 28, 2022, 8 a.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
June 28, 2022, 8 a.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
June 28, 2022, 7 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 6 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 5 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 28, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 28, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 10 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 10 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 9 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
June 27, 2022, 9 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
June 27, 2022, 9 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
June 27, 2022, 8 p.m. N/A N/A N/A N/A N/A 8.0 ppb (12) N/A N/A N/A N/A 12.0
 
June 27, 2022, 8 p.m. N/A N/A N/A N/A N/A 8.0 ppb (12) N/A N/A N/A N/A 12.0
 
June 27, 2022, 8 p.m. N/A N/A N/A N/A N/A 8.0 ppb (12) N/A N/A N/A N/A 12.0
 
June 27, 2022, 4 p.m. N/A N/A N/A N/A N/A 13.0 ppb (19) N/A N/A N/A N/A 19.0
 
June 27, 2022, 4 p.m. N/A N/A N/A N/A N/A 13.0 ppb (19) N/A N/A N/A N/A 19.0
 
June 27, 2022, 4 p.m. N/A N/A N/A N/A N/A 13.0 ppb (19) N/A N/A N/A N/A 19.0
 
June 27, 2022, 2 p.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A N/A 8.0
 
June 27, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 9 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 9 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 27, 2022, 1 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 1 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, 1 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 27, 2022, midnight N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 5 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 5 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 5 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 4 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 4 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 4 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 4 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 4 p.m. N/A N/A N/A N/A N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
June 26, 2022, 3 p.m. N/A N/A N/A N/A N/A 11.0 ppb (16) N/A N/A N/A N/A 16.0
 
June 26, 2022, 2 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A N/A 6.0
 
June 26, 2022, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 7 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 7 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 6 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 6 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 6 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 5 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
June 26, 2022, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 26, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 25, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 25, 2022, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
June 25, 2022, 3 p.m. N/A N/A N/A N/A N/A 13.0 ppb (19) N/A N/A N/A N/A 19.0
 
June 25, 2022, 3 p.m. N/A N/A N/A N/A N/A 13.0 ppb (19) N/A N/A N/A N/A 19.0
 
June 25, 2022, 3 p.m. N/A N/A N/A N/A N/A 13.0 ppb (19) N/A N/A N/A N/A 19.0
 
June 25, 2022, 2 p.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A N/A 8.0
 
June 25, 2022, 2 p.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A N/A 8.0
 
June 25, 2022, 2 p.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A N/A 8.0
 
June 25, 2022, 2 p.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A N/A 8.0
 
June 25, 2022, 2 p.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A N/A 8.0
 
June 25, 2022, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0