HIGH

10 active species

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4-Day Forecast:

Morning

Grass LOW

Tree HIGH

Weed LOW

Afternoon

Grass LOW

Tree HIGH

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 English Oak	HIGH	74 grains/m³
🌳 Paper Birch	HIGH	60 grains/m³
🌳 Downy Birch	HIGH	56 grains/m³
🌳 White Oak	HIGH	52 grains/m³
🌳 Silver Birch	MED	41 grains/m³
+35 more tracked Holm Oak London Plane Box Elder Black Poplar Ribwort Plantain Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 English Oak	HIGH	92 grains/m³
🌳 Paper Birch	HIGH	74 grains/m³
🌳 Downy Birch	HIGH	69 grains/m³
🌳 White Oak	HIGH	64 grains/m³
🌳 Silver Birch	HIGH	51 grains/m³
+35 more tracked Holm Oak London Plane Box Elder Black Poplar Ribwort Plantain Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 English Oak	HIGH	70 grains/m³
🌳 Paper Birch	HIGH	56 grains/m³
🌳 Downy Birch	HIGH	52 grains/m³
🌳 White Oak	MED	49 grains/m³
🌳 Silver Birch	MED	39 grains/m³
+35 more tracked Holm Oak London Plane Box Elder Black Poplar Ribwort Plantain Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 English Oak	HIGH	60 grains/m³
🌳 Paper Birch	MED	48 grains/m³
🌳 Downy Birch	MED	45 grains/m³
🌳 White Oak	MED	42 grains/m³
🌳 Silver Birch	MED	33 grains/m³
+35 more tracked Holm Oak London Plane Box Elder Ribwort Plantain Black Poplar Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS

Last updated: 14:03 UTC

4-Day Forecast	Tree	Grass	Weed
Wed 20 May	HIGH	LOW	LOW
Thu 21 May	HIGH	LOW	LOW
Fri 22 May	HIGH	LOW	LOW
Sat 23 May	HIGH	LOW	LOW

Map of Rotterdam (51.9225°, 4.4792°)

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What Pollen Levels Mean

LOW Symptoms are unlikely

MED Moderate risk of symptoms

HIGH Widespread symptoms likely

V.HI Expect significant symptoms

X.HI Extremely high symptom likelihood & severity