National Park Service Arrowhead
Explore Air

Current Ozone and Weather Data in National Parks


Grand Canyon National Park - The Abyss, AZ
EPA AQS Site Number: 04-005-8001


Today's Data   Data Timelines   Ozone Health Advisory  
Ozone Thursday July 20, 2017 
Hour Ending
(Local Time)
1-Hour Average
(parts per billion)
8-Hour Average
(parts per billion)
12 AM 54 51
1 AM 52 49
2 AM 54 49
3 AM 55 48
4 AM 52 47
5 AM 50 46
6 AM 48 46
7 AM 45 46
8 AM 43 46
9 AM 45 47
10 AM 47 48
11 AM 47 48
12 PM 46 48
1 PM 48 48
2 PM 49 48
3 PM 49 47
4 PM 50 45
5 PM 52 43
6 PM 46 42
7 PM 46 41
8 PM 49 41
9 PM 48 40
10 PM 39 40
11 PM 36 41
Weather and Ozone Data Thursday July 20, 2017
Hour
Ending
(Local Time)
Ozone
(parts per
billion)
Wind
Speed
(meters per
second)
Wind
Direction
Temperature
(degrees C)
Relative
Humidity
(%)
Solar
Radiation
(watts per
meter
squared)
Rainfall
(millimeters)
12 AM 54 1.2 SW 19.2 59 0 0.0
1 AM 52 1.9 SE 18.5 60 0 0.0
2 AM 54 1.6 SE 18.6 60 0 0.0
3 AM 55 1.8 SE 18.4 61 0 0.0
4 AM 52 2.7 S 17.0 67 0 0.0
5 AM 50 3.1 S 16.6 68 0 0.0
6 AM 48 2.8 S 16.2 70 8 0.0
7 AM 45 2.2 SW 17.0 69 159 0.0
8 AM 43 2.0 SW 18.7 66 319 0.0
9 AM 45 2.4 W 20.1 62 534 0.0
10 AM 47 2.1 W 21.3 56 640 0.0
11 AM 47 1.4 NE 21.1 58 479 0.0
12 PM 46 2.1 W 22.4 53 695 0.0
1 PM 48 2.3 W 24.0 42 943 0.0
2 PM 49 2.4 N 24.6 42 958 0.0
3 PM 49 1.7 NE 25.5 40 810 0.0
4 PM 50 1.8 W 24.9 42 221 0.0
5 PM 52 6.4 SW 20.3 56 69 0.0
6 PM 46 5.4 SW 18.9 70 99 0.0
7 PM 46 3.5 SW 19.5 65 48 0.0
8 PM 49 1.1 N 20.2 60 7 0.0
9 PM 48 1.1 N 20.8 57 0 0.0
10 PM 39 1.4 S 18.7 67 0 0.0
11 PM 36 3.1 S 17.5 73 0 0.0
U.S. Department of the Interior Accessibility Freedom of Information Act USA.gov Search
Privacy Policy Disclaimer NPS Home Contact Us
updated on 07/21/2017 8:40 AM  I   http://www.nature.nps.gov/air/data/current/data_GRCA-AS2.cfm   I  Email: Webmaster