V.HI

12 active species

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4-Day Forecast:

Morning

Grass LOW

Tree HIGH

Weed LOW

Afternoon

Grass LOW

Tree V.HI

Weed LOW

Evening

Grass LOW

Tree HIGH

Weed LOW

Species	Level	Count
🌳 Silver Birch	V.HI	159 grains/m³
🌳 Ash	V.HI	131 grains/m³
🌳 Downy Birch	V.HI	104 grains/m³
🌳 Box Elder	HIGH	96 grains/m³
🌳 Paper Birch	HIGH	79 grains/m³
+35 more tracked Black Poplar English Oak White Oak Field Elm White Mulberry Mediterranean Cypress Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Holm Oak Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	119 grains/m³
🌳 Ash	HIGH	98 grains/m³
🌳 Downy Birch	HIGH	78 grains/m³
🌳 Box Elder	HIGH	72 grains/m³
🌳 Paper Birch	HIGH	59 grains/m³
+35 more tracked Black Poplar English Oak White Oak Field Elm White Mulberry Mediterranean Cypress Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Holm Oak Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	X.HI	480 grains/m³
🌳 Ash	X.HI	395 grains/m³
🌳 Downy Birch	X.HI	314 grains/m³
🌳 Box Elder	X.HI	290 grains/m³
🌳 Paper Birch	X.HI	237 grains/m³
+35 more tracked Black Poplar English Oak White Oak Field Elm White Mulberry Mediterranean Cypress Alder Holm Oak Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	X.HI	453 grains/m³
🌳 Ash	X.HI	373 grains/m³
🌳 Downy Birch	X.HI	296 grains/m³
🌳 Box Elder	X.HI	274 grains/m³
🌳 Paper Birch	X.HI	224 grains/m³
+35 more tracked Black Poplar English Oak White Oak Field Elm White Mulberry Mediterranean Cypress Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Holm Oak Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS

Last updated: 14:03 UTC

4-Day Forecast	Tree	Grass	Weed
Wed 20 May	V.HI	LOW	LOW
Thu 21 May	V.HI	LOW	LOW
Fri 22 May	X.HI	LOW	LOW
Sat 23 May	X.HI	LOW	LOW

Map of Ottawa (45.4215°, -75.6972°)

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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