National Allergy Report

Grass pollen remains the main outdoor burden for the broadest set of allergy sufferers. The strongest clusters were in the West, Midwest, and South Central region: Oregon, Washington, Montana, Wisconsin, Minnesota, Oklahoma, and parts of Texas all had high grass readings. Seattle slipped from last week's peak but stayed elevated, while La Crosse and Oklahoma City moved up into the high range and Austin, Greenfield, Eugene, Missoula, Portland, and Waco South held there.

Seattle was the lone Very High location, while Portland, Austin, and northern Waco joined the higher grass range. Mold pressure also mattered in Chicago, St. Louis, Oklahoma City, and San Antonio East; tree pollen and weeds were more scattered.

Palms are not a single uniform pollen problem across North America, but they can still matter to allergy sufferers in the places where they are common. In the United States, the strongest outdoor palm exposure is concentrated in Florida, the Gulf and south Atlantic coastal plain, the lower Rio Grande region, desert oasis habitats in the Southwest, Puerto Rico, Hawaii, and some frost-free subtropical landscapes where outdoor palms are long established.^1-7

Grass pollen remains the most widespread outdoor allergy burden. The West had the sharpest pressure, with Eugene and Seattle still Very High; Colorado Springs stayed high and Reno climbed into the high range. Midwest grass stayed elevated in Chicago and Greenfield, though La Crosse and Madison slipped below high levels, and South Central grass remained steady around Oklahoma City and Waco.

Eugene remained in the top severity band, while high grass readings held around Chicago, Wisconsin, Oklahoma City, Waco, San Juan, Portland, and Colorado Springs. Tree pollen is now mostly limited to the West and Puerto Rico, and mold was mainly a local issue in Austin, Chicago, and St. Louis.