February
2007
Air Quality Summary
Air quality during
February
was in the "Good" category
for 15 days,
in the "Moderate" category
for 10 days, and
in the "Unhealthy for Sensitive Groups" category for 3 days.
Precipitation was 0.8 inches
below normal levels in the Puget
Sound region, with SeaTac airport receiving 3.38 inches
of rainfall. The airport average monthly temperature of 43.6° F
was 0.3 degrees
above normal for
February
with a maximum temperature of 58° F
on the 17th.
A minimum temperature of 28° F
occurred on the 18th.
-
The highest PM2.5 value of
52 µg/m3 was in the
"Unhealthy for Sensitive Groups" category (AQI of 123)
and was measured on Sunday the 4th at Darrington.
-
The highest PM10 value of
61 µg/m3 was in the
"Moderate" category (AQI of 54)
and was measured on Friday the 2nd at the James St and Central Ave site in Kent.
-
The highest 8-hour average for carbon monoxide was 2.6
ppm, in the "Good" category (AQI of 30),
and occurred during the evening hours of
Friday the 2nd at the 148th Ave NE site in Bellevue.
-
Air quality in the month of
February
exceeded our PM2.5 health goal in Snohomish County 5 times,
in King County 5 times,
in Pierce County 5 times
and in Kitsap County 1 times.
