May
2007
Air Quality Summary
Air quality during
May
was in the "Good" category
for 27 days, and
in the "Moderate" category
for 4 days.
Precipitation was .32 inches
below normal levels in the Puget
Sound region, with SeaTac airport receiving 1.46 inches
of rainfall. The airport average monthly temperature of 56.6° F
was 0.8 degrees
above normal for
May
with a maximum temperature of 87° F
on the 30th.
A minimum temperature of 41° F
occurred on the 3rd and on the 5th.
-
The highest PM2.5 value of 19 µg/m3 was in the
"Moderate" category (AQI of 59)
and was measured on Wednesday the 30th at the Duwamish site in Seattle.
-
The highest PM10 value of 42 µg/m3 was in the
"Good" category (AQI of 39)
and was measured on Wednesday the 30th at the Alexander Ave site in Tacoma.
-
Ozone 8 hour standard - The highest 8-hour average for ozone was ppm,
in the "" category (AQI of ),
and occurred on at .
-
The highest 8-hour average for carbon monoxide was 1.1 ppm, in the "Good" category (AQI of 13),
and occurred during the late afternoon hours of Friday the 4th at the 148th Ave NE site in Bellevue.
-
Air quality in the month of
May
did not exceed our PM2.5 health goal in Snohomish, King, Pierce, or Kitsap Counties.
