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About Pollen in Chelmsford

Chelmsford’s spring allergy profile, late March to May, features peak Birch and Oak pollen, largely sourced from Central Park and Admirals Park arboreal zones; summer, June to August, sees high grass pollen from River Chelmer and River Can floodplains and surrounding meadows. The city’s basin topography, particularly near Hylands Park, can create pollen trapping effects, intensifying localised allergen exposure; late autumn, September through November, experiences elevated mould spore levels, primarily from damp leaf decomposition in urban woodlands and riparian zones.

V.HI

11 active species

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4-Day Forecast:

Morning

Grass LOW

Tree X.HI

Weed LOW

Afternoon

Grass LOW

Tree V.HI

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 Silver Birch	V.HI	117 grains/m³
🌳 Downy Birch	V.HI	104 grains/m³
🌳 Paper Birch	HIGH	82 grains/m³
🌳 English Oak	HIGH	66 grains/m³
🌳 Holm Oak	MED	32 grains/m³
+35 more tracked Black Poplar Box Elder Ash London Plane White Oak Field Elm 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	132 grains/m³
🌳 Downy Birch	V.HI	117 grains/m³
🌳 Paper Birch	HIGH	92 grains/m³
🌳 English Oak	HIGH	75 grains/m³
🌳 Holm Oak	MED	36 grains/m³
+35 more tracked Black Poplar Box Elder Ash London Plane White Oak Field Elm 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	120 grains/m³
🌳 Downy Birch	V.HI	106 grains/m³
🌳 Paper Birch	HIGH	84 grains/m³
🌳 English Oak	HIGH	68 grains/m³
🌳 Holm Oak	MED	33 grains/m³
+35 more tracked Box Elder Black Poplar Ash London Plane White Oak Field Elm 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	115 grains/m³
🌳 Downy Birch	V.HI	102 grains/m³
🌳 Paper Birch	HIGH	81 grains/m³
🌳 English Oak	HIGH	65 grains/m³
🌳 Holm Oak	MED	32 grains/m³
+35 more tracked Black Poplar Box Elder Ash London Plane White Oak Field Elm 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS

Last updated: 14:02 UTC

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

Map of Chelmsford (51.719099°, 0.480658°)

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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