Get Your Allergy Forecast

Frequently Asked Questions About Pollen Forecasting And Sampling for Allergy Alerts

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IMS Health Incorporated, the company behind the Allergy Alert™ on, has spent 25 years studying pollen counts and the methods for pollen sampling. We know how important pollen information is to allergy and hay fever sufferers, and how easily the information can be misunderstood. This is why we have developed one reporting scale, easily understood by viewers.

IMS Health does not generate its own weather forecast; We are not weather forecast experts. The weather data comes from weather forecasting authority - NOAA.

Our pollen levels are on a scale of 12. Low is 0-2.4, Low-Medium is 2.5-4.8, Medium is 4.9-7.2, High-Medium is 7.3-9.6, and High is 9.7-12.0. These levels take into account how much pollen the allergy sufferer is likely to be exposed to for that given period.

Pollen counting has been recognized as an important process since the turn of the 20th century. Not only have pollen counts advanced our knowledge of the role plant pollen plays in causing allergy, they have become a powerful tool just like accurate weather forecasts in day-to-day, individual health problem solving.

  • How do you use pollen counts in your pollen forecasts? Where do you have pollen counting stations in my city? Go
  • How do we create pollen forecasts? Go
  • How do we verify pollen forecasts? Go
  • Where is the best place to live in the United States to avoid seasonal allergies such as Hay Fever? Go
  • I checked the pollen and hay fever forecast on your website for numerous communities around me, and the forecast levels are all the same. Don't you issue forecasts for each zipcode? If so, why are the numbers the same? Go
  • I checked your hay fever and pollen forecast and compared it with a pollen count for the same day. Why were they strikingly different? Go
  • The pollen count reported on the radio may have astronomically high numbers on one given day, or for a short series of days, and this may not match what the Allergy Alert pollen forecast says. Go
  • Could you include ozone and particulate levels (dust, pollution, smoke) in your forecasts? Go
  • I am seeing pollen floating around in the air. Why are you not reporting it? Go
  • The pine trees in my area are producing large quantities of allergy-causing pollen. Why are you not reporting it as a predominant type? Go
  • Where can I find photos and information on the predominant pollen types? Go
  • What does "mixed trace" mean? Go
  • Where is my daily pollen report? I haven't received it for a few weeks. I like the link to my extended pollen, hay fever, and weather forecast. Go
  • My friend would like to receive the Allergy Alert also. Can you help? Go
  • I moved and have a new zip code. How can I change it to receive the Allergy Alerts for my new area? Go
  • What makes and Allergy Alert "The Pollen People"? Go
  • Tell Me About Pollen Counting Go
  • What equipment is used in pollen counting? Go
  • Where do you get your weather forecast? You are not weather forecasting experts? Go