Placentia pollen forecast - today, tomorrow and the week ahead
Today (16 July) pollen in Placentia is low; cypress, grass, and ragweed are low. Tomorrow (17 July 2026) levels are similar. Over the following five days cypress, 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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Placentia's Orange County California foothill setting features olive, orange, and blue gum eucalyptus as the main tree pollen sources, with exposure varying between the Puente Hills chaparral fringe and the more built-up commercial corridors along Chapman Avenue. The Carbon Creek corridor provides locally significant green space, while the foothill-to-valley topographic gradient creates distinct pollen exposure differences between the hillside areas and the flat valley floor, and the Santa Ana winds can concentrate pollen.
Today - 16 July
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
18/100
-
Grass (Poaceae):
Low
20/100
-
Oak (Quercus):
None
0/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
None
0/100
-
Ragweed (Ambrosia):
Low
20/100
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 Placentia
View air qualityFrequently Asked Questions
Is pollen high in Placentia right now?
On 16 July 2026, overall pollen levels in Placentia are low. Grass is the main contributor to airborne pollen, while ambrosia and cypress remain at lower levels
Will pollen levels change in Placentia tomorrow?
On 17 July 2026, pollen conditions in Placentia will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Placentia this week?
According to the five-day outlook, grass, ambrosia, artemisia, and cypress pollen levels will increase later in the week.
Which pollen types are currently active in Placentia?
On 16 July 2026, Grass is the dominant pollen source in Placentia. ambrosia and cypress are also present but at lower levels. oak, willow, alder, artemisia, and birch are not currently active.
When is pollen season in Placentia?
How often is the Placentia pollen forecast updated?
The Placentia pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Placentia 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 Placentia 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 Placentia, 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?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Placentia.
For long term forecasts and maps, see the Airmine app
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.