WyomingRural Ozone Monitoring

WRAP – IOC Meeting

July 21-22, 2003

Denver, CO

Ozone Monitor

Thunder Basin

Campbell County

CASTNetPinedale

CASTNetCentennial

Green River Basin

CASTNetYellowstone

Rural Ozone Monitoring in WY

Network Site Start Date Stop Date

CASTNet Centennial July 1989 Ongoing

CASTNet Pinedale Jan. 1989 Ongoing

CASTNet Yellowstone June 1996 Ongoing

WDEQ Green River Basin

August 1998 Dec. 2001

WDEQ Thunder Basin May 2001 Ongoing

WDEQ Campbell County

July 2003 Ongoing

WyomingMax. Daily 8-hr O3 Summary

Site Years Averages (ppm) Valid Days1st 2nd 3rd 4th

Thunder Basin 2001 0.075 0.075 0.073 0.070 99%

Thunder Basin 2002 0.088 0.075 0.074 0.072 98%

Yellowstone 1999-2001 0.072 0.070 0.068 0.067 99%

Yellowstone 2000-2002 0.069 0.068 0.066 0.065 97%

Green River Basin 1999-2001 0.078 0.073 0.071 0.069 99%

8-hr O3 AAQS 0.08 ppm annual 4th-highest daily max. 8-hr avg.

Thunder Basin

Ozone measurements and corresponding images when wildfires burned in northeast

Wyoming

Thunder Basin July 5, 2001

12:00 pm

SVR = 87 km

O3 = 68 ppb

15:00 pm

SVR = 59 km

O3 = 77 ppb

July 19, 2002

10:15 am

SVR = 130 km

O3 = 78 ppb

11:45 am

SVR = 54 km

O3 = 86 ppb

July 19, 2002 (12:00-12:45 pm)

SVR = 23 km O3 = 88 ppb

July 19, 2002 (3:00-3:45 pm)

SVR = 58 km O3 = 96 ppb (highest O3 value in 2002)