March
2007
Air Quality Summary
Air quality during
March
was in the "Good" category
for 21 days, and
in the "Moderate" category
for 10 days.
Precipitation was 0.67 inches
above normal levels in the Puget
Sound region, with SeaTac airport receiving 4.42 inches
of rainfall. The airport average monthly temperature of 47.1° F
was 0.9 degrees
above normal for
March
with a maximum temperature of 68° F
on the 6th.
A minimum temperature of 31° F
occurred on the 1st.
-
The highest PM2.5 value of
34 µg/m3 was in the
"Moderate" category (AQI of 87)
and was measured on Tuesday the 6th at the 212th St SW site in Lynnwood.
-
The highest PM10 value of
52 µg/m3 was in the
"Good" category (AQI of 48)
and was measured on Thursday the 29th at the Duwamish site in Seattle.
-
The highest 8-hour average for carbon monoxide was 1.9
ppm, in the "Good" category (AQI of 22),
and occurred during the evening hours of
Thursday the 29th at the 148th Ave NE site in Bellevue.
-
Air quality in the month of
March
exceeded our PM2.5 health goal in Snohomish County 2 times,
in King County 0 times,
in Pierce County 0 times
and in Kitsap County 0 times.
