October
2006
Air Quality Summary
Air quality during
October
was in the "Good" category
for 15 days,
in the "Moderate" category
for 15 days, and
in the "Unhealthy for Sensitive Groups" category for 1 days.
Precipitation was 1.64 inches
below normal levels in the Puget
Sound region, with SeaTac airport receiving 1.55 inches
of rainfall. The airport average monthly temperature of 52.3° F
was 0.4 degrees
below normal for
October
with a maximum temperature of 72° F
on the 12th.
A minimum temperature of 30° F
occurred on the 31st.
-
The highest PM2.5 value of
45 µg/m3 was in the
"Unhealthy for Sensitive Groups " category (AQI of 110)
and was measured on Sunday the 22nd at the Darrington site.
-
The highest PM10 value of
71 µg/m3 was in the
"Moderate" category (AQI of 59)
and was measured on Friday the 13th at the Alexander Ave site in Tacoma.
-
The highest 8-hour average for carbon monoxide was 2.1
ppm, in the "Good" category (AQI of 24),
and occurred during the late evening hours of
Thursday the 12th at the 148th Ave NE site in Bellevue.
-
Air quality in the month of
October
exceeded our PM2.5 health goal in Snohomish County times,
in King County times,
in Pierce County times
and in Kitsap County times.
