Ellicott City pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Ellicott City is low; grass and ragweed are low. Tomorrow (17 July 2026) levels are similar. Over the following five days grass and ragweed will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

For long term forecasts and maps, see the Airmine app

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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

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Ellicott City's Howard County Maryland setting features oak, tulip poplar, and maple as the main tree pollen sources, with exposure varying considerably between the extensively wooded Patuxent River headwaters to the south and the more built-up historic downtown and newer commercial corridors. The Patuxent watershed woodland is a particularly significant local tree pollen source, creating distinct pollen gradients between the forested south and developed north.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    21/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    2/100

High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.

Tomorrow - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    None

    0/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Air quality in Ellicott City

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Frequently Asked Questions

Is pollen high in Ellicott City right now?

On 16 July 2026, overall pollen levels in Ellicott City are low. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels

Will pollen levels change in Ellicott City tomorrow?

On 17 July 2026, pollen conditions in Ellicott City will be similar to today with no significant pollen expected.

Is pollen expected to decrease in Ellicott City this week?

According to the five-day outlook, ambrosia and grass pollen levels will increase later in the week.

Which pollen types are currently active in Ellicott City?

On 16 July 2026, Ambrosia is the dominant pollen source in Ellicott City. grass are also present but at lower levels. alder, artemisia, birch, cypress, oak, and willow are not currently active.

When is pollen season in Ellicott City?
Ellicott City's Baltimore suburban setting produces a season opening in late February with cedar and elm before oak peaks through April. Grass from surrounding Maryland farmland peaks through May and June before mugwort and nettle extend exposure into September. The Patuxent River headwaters setting channels airflows, while the warm mid-Atlantic climate advances the season compared to more northern East Coast cities.
How often is the Ellicott City pollen forecast updated?

The Ellicott City pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in Ellicott City 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 Ellicott City 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 Ellicott City, 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.

Want to see pollen forecasts for other cities in United States?

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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Ellicott City.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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