August
2007
Air Quality Summary
Air quality during
August
was in the "Good" category
for 29 days, and
in the "Moderate" category
for 2 days.
Precipitation was .29 inches
below normal levels in the Puget
Sound region, with SeaTac airport receiving .73 inches
of rainfall. The airport average monthly temperature of 65.6° F
was normal for
August
with a maximum temperature of 86° F
on the 29th.
A minimum temperature of 52° F
occurred on the 11th and 28th.
-
The highest PM2.5 value of 20 µg/m3 was in the
"Moderate" category (AQI of 59)
and was measured on Thursday the 30th at the Duwamish site in Seattle.
-
The highest PM10 value of 38 µg/m3 was in the
"Good" category (AQI of 35)
and was measured on Thursday the 30th at the Duwamish site in Seattle.
-
The highest 8-hour average for carbon monoxide was 0.7 ppm, in the "Good" category (AQI of 35),
and occurred during the morning hours of the 14th (Tues), 21st (Tues), and 23rd (Thurs), and the evening hours of the 22nd (Wed) at the 148th Ave NE site in Bellevue.
-
Ozone 8 hour standard - The highest 8-hour average for ozone was 0.069 ppm,
in the "Moderate" category (AQI of 61),
and occurred on Wednesday, August 15th at the North Bend site.
-
Air quality in the month of
August did not exceed our PM2.5 health goal in any of the 4 counties.
