November
2007
Air Quality Summary
Air quality during
November
was in the "Good" category
for 9 days,
in the "Moderate" category
for 19 days, and
in the "Unhealthy for Sensitive Groups" category for 2 days.
Precipitation was 2.19 inches
below normal levels in the Puget
Sound region, with SeaTac airport receiving 3.71 inches
of rainfall. The airport average monthly temperature of 44.3° F
was 0.9 degrees
below normal for
November
with a maximum temperature of 58° F
on the 3rd.
A minimum temperature of 29° F
occurred on the 23rd.
-
The highest PM2.5 value of
45 µg/m3 was in the
"Unhealthy for Sensitive Groups" category (AQI of 45)
and was measured on Friday the 23rd at the South L St site in Tacoma.
-
The highest PM10 value of
49 µg/m3 was in the
"Good" category (AQI of 45)
and was measured on Friday the 2nd 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
Tuesday the 13th and Thursday the 29th at the 148th Ave NE site in Bellevue.
-
Air quality in the month of
November exceeded our PM2.5 heath goal in King County 6 times, Snohomish County 6 times, Pierce County 8 times, and Kitsap County 5 times.
