| National Allergy Bureau | | Daily pollen/spore counts for US cities, including source-specific counts and alerts by email. |
| Personal Allergy Forecast | | Pollen.com's Personal Allergy Alert Forecast provides vast amounts of information on pollen and allergies for sufferers. Get a daily allergy forecast emailed to you. |
| WeatherSmith | | Air quality forecasts and related information for the southwestern United States | |
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