October
2007
Air Quality Summary
Air quality during
October
was in the "Good" category
for 19 days, and
in the "Moderate" category
for 12 days.
Precipitation was .13 inches
above normal levels in the Puget
Sound region, with SeaTac airport receiving 3.32 inches
of rainfall. The airport average monthly temperature of 50.5° F
was 2.2 degrees
below normal for
October
with a maximum temperature of 72° F
on the 23rd.
A minimum temperature of 34° F
occurred on the 31st.
-
The highest PM2.5 value of
37 µg/m3 was in the
"Moderate" category (AQI of 92)
and was measured on Sunday the 28th at the Duwamish site in Seattle.
-
The highest PM10 value of
56 µg/m3 was in the
"Moderate" category (AQI of 51)
and was measured on Tuesday the 23rd at the Duwamish site in Seattle.
-
The highest 8-hour average for carbon monoxide was 1.8
ppm, in the "Good" category (AQI of 20),
and occurred during the early evening hours of
Sunday the 28th at the 148th Ave NE site in Bellevue.
-
Air quality in the month of
October exceeded our PM2.5 health goal in King County 5 times, in Snohomish County 6 times, and in Pierce County 5 times.
