Pollen season does not end at your front door.
Closing the windows does not close the door on pollen. It gets in through ventilation, clothing, and pets. It settles on surfaces. And your indoor conditions determine whether it stays harmless or breaks apart into particles that go straight into your lungs. The uHoo Pollen Index watches those conditions so you always know where you stand.
The weather app tells you what is outside. It tells you nothing about your home.
Most people think of pollen as an outdoor problem. But studies show indoor pollen concentrations can reach 80 percent of outdoor levels. Pollen comes in through your windows, your ventilation system, and on the clothes you wear. Once inside, it sits on your floors, your curtains, and your bedding. Every time someone walks through the room, it goes back into the air.
What happens to that pollen once it is inside your home depends entirely on your indoor conditions. Some environments keep it largely inert. Others cause it to fragment into particles fine enough to reach deep into your airways. A few make the whole reaction worse through pollutants that prime your immune system to overreact.
The uHoo Pollen Index scores those conditions from 1 to 10, updated daily from your live sensor data. The exact parameters, ideal ranges, and full methodology are in the white paper.
Get the white paper ↓
Your score tells you exactly what is happening and what to do about it.
The index runs from 1 to 10. Low scores mean your indoor conditions are keeping pollen in check. High scores mean conditions are working against you. Every level comes with specific, practical actions.
Six things your home is doing to pollen right now.
The index weighs six measurable indoor conditions. Here is what each one is and why it is in the model. The exact thresholds, ideal ranges, and how they interact are in the white paper.
Pollen season ends outside. Inside, it is a different story.
Pollen settled on your floors, curtains, and furniture does not disappear when the outdoor season ends. It sits there and goes back into the air every time someone disturbs it. Winter can still be a problem. The index watches all year.
Waking up congested is not always about what is outside.
Pollen that settles on your bedding, curtains, and floor goes back into the air when you move around overnight. In a sealed bedroom with humidity outside the right range, those particles build up for hours before you take your first breath of the day. The Pollen Index watches those exact conditions through the night so you understand in the morning why you feel the way you do.
The people in your building spend more time there than anywhere else.
A school classroom, a hospital waiting room, an office floor with thirty people and one air return vent. These are the spaces where indoor pollen accumulates fastest and where the people most affected by it, children, patients, and those with respiratory conditions, spend their days. Facilities teams using uHoo Aura get a Pollen Index score for every zone they monitor, with the data to back up every decision they make about ventilation and filtration.
Twenty-one peer-reviewed studies. One clear score. Read how it works.
The Pollen Index is not an estimate or a proxy for outdoor conditions. It is a scoring model built on published science. The white paper covers the methodology, the parameter relationships, the ideal indoor ranges, and the steps that make the biggest difference to your score.
The paper covers what this page intentionally does not: the exact ideal indoor range for each parameter, how the six drivers interact with each other, which interventions move the score most, and what the 21 cited studies actually say. It is practical enough to act on and detailed enough to share with a healthcare professional or building manager.
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What people ask about the Pollen Index.
Pollen is one of four things the index watches for you.
Guard, Command, and uHoo Aura include three other proprietary health indices, each tracking a different invisible indoor air risk.
Know what your indoor air is doing to your pollen exposure.
Pollen, Mold, Virus, and Influenza indices updated daily from your live sensor data. For home or for business.