Catawba Island Township pollen forecast — Harbor Island neighborhood
Pollen Today
Today (20 September) pollen in Harbor Island, Catawba Island Township is moderate; ragweed is moderate; grass and mugwort are low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains low, ragweed declining, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 25/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 5/100 |
| Ragweed (Ambrosia) | Moderate | 31/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | Low | 13/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 19/100 |
Local Environmental Conditions
Here, within 50m of this spot, the water's edge is thick with hazel and willow, whose pollen spreads readily in early spring. Woodland where oak stands alongside birch, the latter especially aggressive as an allergen, just over 200 meters from the neighborhood. This area, conveniently close, some 350 meters off, has well-kept lawns and ornamental trees in this park add their share of grass and ragweed pollen.
Hazel and willow near the water open the pollen calendar early, usually the first pollen source active, peaking sometime in February or March. The area's oak and birch trees pollinate through mid-to-late spring, climbing steadily through spring to a peak in April or May. Through late spring, grass pollen climbs steadily toward its June peak, followed by ragweed's own peak stretch from mid-August into October.
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Resource Hub
Pollen forecast neighborhoods 2 neighborhoods
Sports venues in Catawba Island Township 1 sports venue
Frequently Asked Questions About Pollen in Ohio
Is pollen high in Catawba Island Township right now?
On 20 September 2026, overall pollen levels in Catawba Island Township are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Catawba Island Township tomorrow?
On 21 September 2026, pollen conditions in Catawba Island Township will be different from today, with grass at low levels and ambrosia continuing to decline
Is pollen expected to decrease in Catawba Island Township this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Catawba Island Township?
On 20 September 2026, Ambrosia is the dominant pollen source in Catawba Island Township. artemisia and grass are also present but at lower levels.
When is pollen season in Catawba Island Township?
How often is the Catawba Island Township pollen forecast updated?
The Catawba Island Township pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Catawba Island Township come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Catawba Island Township based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Catawba Island Township, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
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Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
