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Real-time pollen data for Roswell — updated daily.
Bull Sluice Lake's shallow, marshy 674 acres and the continuous decomposition of emergent vegetation in warm standing water drive fungal spore production well above what drier bottomland forest produces. Cladosporium and Alternaria peak in late summer and early fall. Aspergillus and Penicillium are common indoors. The Vickery Creek gorge holds moisture and leaf litter that sustains a second concentrated mold pocket within the city. Homes on low ground near the impoundment carry the heaviest burden.
Emergent marsh vegetation around Bull Sluice Lake and the river's marshy margins includes wind-pollinated species that release genuinely allergenic pollen. Cattails produce abundant pollen in late spring and early summer. Sedges, rushes, and wetland grasses contribute. This is a summer pollen source that upland suburbs on the same Piedmont largely lack.
Oak is Roswell's dominant tree allergen. White oak, red oak, water oak, willow oak, and post oak occur across mature residential canopy and throughout the creek and river corridors. Oak grains are microscopic and remain airborne for hours, penetrating deep into the airways. Roswell's dense established tree cover concentrates spring counts sharply.
Both are abundant across Roswell's oak-hickory canopy and both are significantly allergenic. Sweetgum is especially prevalent along Vickery Creek and in the river bottomlands. Together with oak they compress into an intense late-March-to-April window.
River birch, sycamore, box elder, green ash, and red maple line Vickery Creek and the Chattahoochee margins. Cedar, juniper, elm, and maple open the season in February. The shaded creek gorge extends the pollen window slightly as cooler conditions delay some species relative to the uplands.
Loblolly and shortleaf pine occur throughout Roswell's residential and corridor forest, producing the visible spring yellow film. Grains are large and less efficient at reaching deep airways than oak, but volume makes pine a meaningful irritant for sensitive individuals.
Bermuda grass dominates lawns, parks, and athletic fields. Fescue and ryegrass are common on shaded residential lots. Johnson grass grows along greenway margins and utility corridors. Roswell's heavy canopy means proportionally less open turf than lower-density areas.
Ragweed is the dominant fall allergen, with wetland margins, greenway edges, and utility clearings providing extensive habitat. Smartweed occurs in wet margins. Pigweed, lamb's quarters, nettle, and plantain contribute. Goldenrod blooms conspicuously alongside but is insect-pollinated and produces little airborne pollen.
Dust mites thrive in the humid subtropical climate and reach higher concentrations in homes near the impoundment and creek corridor where sustained humidity persists. Pet dander is significant. Indoor mold risk is elevated in low-lying neighborhoods and in homes with basements or crawl spaces exposed to wetland moisture.
Severity: Low to Moderate. Trees, grasses, and weeds are dormant. Indoor allergens dominate, with dust mites and pet dander peaking under closed-window heating. Homes near Bull Sluice Lake and the Vickery Creek gorge continue to see elevated indoor mold from sustained wetland humidity even through winter. Cedar and juniper may begin producing by mid-January. This is the window to establish preventive treatment.
Severity: Moderate. Maple, elm, cedar, and juniper lead. River birch and box elder begin along Vickery Creek and the Chattahoochee margins. Oak and hickory start ramping across mature residential canopy. Pine begins producing. Wetland vegetation begins greening as water warms. Counts climb steadily.
Severity: Severe. Oak, hickory, sweetgum, and birch peak together across Roswell's dense established canopy. Bottomland and creek corridor species compound the load. The shaded Vickery Creek gorge holds moisture and pollen longer than surrounding uplands. Dry, windy afternoons spike counts sharply.
Severity: High. Tree pollen declines as Bermuda grass surges and, distinctively for Roswell, cattails and sedges release abundant pollen from the Bull Sluice Lake margins and marshy shorelines. Summer heat and humidity build over shallow standing water. Wetland mold climbs steadily. Thunderstorms begin, with red clay holding moisture on the uplands.
Severity: Severe. Ragweed begins in August and climbs through September, with wetland margins and greenway edges providing extensive habitat. Alternaria and Cladosporium reach annual peaks as emergent vegetation decomposes in warm standing water. Grass continues. Heat and humidity remain heavy across the impoundment.
Severity: Moderate to High. Ragweed persists into late October, extended by warm autumns. Cattails and marsh vegetation die back and begin decomposing in place, sustaining wetland fungal spore production later than upland leaf litter would. Heavy leaf fall from the mature canopy adds to the load. Counts drop through November toward the winter lull.
This is the single most useful thing to understand about allergies in Roswell. When Georgia Power completed Morgan Falls Dam in 1904, it converted the stretch of Chattahoochee upstream — Roswell's stretch — from a narrow river with rapids into Bull Sluice Lake, a shallow impoundment of roughly 674 acres. What was moving water became standing water, and standing water in a humid subtropical climate becomes marsh. Today that reach supports beavers, muskrats, waterfowl, and extensive emergent wetland vegetation. For allergy sufferers this matters enormously: wetlands are among the most productive fungal environments there are, generating spores continuously through the warm months, and emergent marsh plants like cattails, sedges, and rushes are wind-pollinated in their own right. Roswell's water-related allergen burden is a wetland burden, not a river burden.
Roswell has built its recreation directly into that wetland. The Roswell Riverwalk runs roughly seven miles of boardwalk and paved greenway through marsh habitat, and the Chattahoochee Nature Center occupies 127 acres of wetlands, native gardens, and trails just off the river. These are genuinely wonderful places, and they also put you standing directly over shallow standing water and decomposing emergent vegetation — the highest fungal spore density available in the north metro. If you are mold-sensitive, walk them in the afternoon rather than early morning when humidity is highest, avoid them entirely in the days after heavy rain, and take a shower when you get home rather than carrying spores into your bedding.
Vickery Creek — also called Big Creek — is the only unit of the Chattahoochee River National Recreation Area bounded by a tributary rather than the river itself. It runs through a narrow, steep-sided gorge where ridge-top trails sit as much as a hundred feet above the water, and the 1836 Roswell Mill dam still impounds the creek above a spillway waterfall. Narrow shaded gorges hold moisture and stay cool and humid long after surrounding uplands dry out. The result is a pocket of sustained humidity, dense leaf litter, and concentrated mold within an otherwise ordinary suburban landscape. Old Mill Park and the covered bridge sit right at the center of it.
Marsh plants get lumped together, but they behave very differently. Cattails, sedges, rushes, and wetland grasses are wind-pollinated and release genuinely allergenic pollen — cattails in particular produce it in large quantities in late spring and summer. The showy flowering marsh plants that catch your eye are mostly insect-pollinated and contribute very little airborne pollen. If your symptoms spike in early summer when tree season is over and you spend time near the wetlands, cattail and sedge pollen is a strong candidate worth testing for.
Bull Sluice Lake is shallow — averaging around twenty-seven feet — with extensive marshy margins, and it holds humidity in the surrounding low ground well beyond what upland Roswell experiences. Combine that with Piedmont red clay that drains slowly after thunderstorms and you get sustained damp conditions around foundations, crawl spaces, and basements in riverside and creekside neighborhoods. Run dehumidifiers through the warm months rather than seasonally, extend downspouts well clear of the house, and check crawl spaces after extended wet stretches.
Roswell has substantial residential tree cover — mature oak-hickory across established neighborhoods and heavy forest through the creek and river corridors. That produces a compressed, intense late-March-to-April tree pollen peak. Antihistamines and nasal steroid sprays need several days of lead time to reach full effect, so starting them in late February gets you protected before the peak rather than chasing it. Patients who front-load consistently report milder seasons than those who react once counts spike.
Because Roswell sits on a wetland rather than a flowing river. Morgan Falls Dam, completed in 1904, converted the upstream reach from a narrow river with rapids into Bull Sluice Lake — a shallow impoundment of about 674 acres. Standing water in a humid subtropical climate becomes marsh, and wetlands are among the most productive fungal environments there are, generating spores continuously through the warm months.
Late March through April is worst for tree pollen, when oak, hickory, sweetgum, and birch peak together across Roswell's dense canopy. May through July adds cattail, sedge, and wetland grass pollen from the marsh margins. Ragweed peaks August through October. Wetland mold stays elevated from spring through fall and is the defining year-round consideration.
They sit on opposite sides of the same dam. Roswell is above Morgan Falls on Bull Sluice Lake — shallow, slow, warm, marshy water producing heavy wetland mold and emergent marsh pollen. Sandy Springs is at and below the dam on colder, faster released water. Same river, genuinely different water bodies, and correspondingly different allergen profiles.
They place you directly over the wettest ground in the north metro. The Roswell Riverwalk runs about seven miles of boardwalk and greenway through marsh habitat, and the Chattahoochee Nature Center occupies 127 acres of wetlands. Both are excellent places to spend time, but if you are mold-sensitive, visit in the afternoon rather than humid early mornings, skip the days right after heavy rain, and shower when you get home.
Some do. Cattails, sedges, rushes, and wetland grasses are wind-pollinated and release genuinely allergenic pollen — cattails in particular produce it abundantly in late spring and early summer. The showy flowering marsh plants that draw the eye are mostly insect-pollinated and contribute very little. If summer symptoms persist after tree season ends and you spend time near the wetlands, cattail and sedge pollen is worth testing for.
Yes. HeyAllergy provides telemedicine appointments with board-certified allergists licensed in Georgia. No waitlist. Available throughout north metro Atlanta including Roswell, Alpharetta, Milton, Sandy Springs, Johns Creek, and surrounding communities.
HeyPak® sublingual immunotherapy drops are customized based on allergy blood test results. For Roswell residents, this targets local oak, hickory, sweetgum, pine, Bermuda grass, wetland grasses, ragweed, mold, and dust mite allergens specific to the Piedmont and Chattahoochee wetland corridor. Daily drops placed under the tongue retrain your immune system rather than just suppressing symptoms, with improvement typically seen in 3–6 months. Treatment is recommended for 3–5 years for lasting relief. Starting at $47/month.
HeyAllergy accepts Medicare and most major PPO health plans, including United Healthcare, Anthem Blue Cross Blue Shield, Blue Shield, Cigna, Aetna, Humana, Oscar, and Tricare. Contact your insurance provider with Tax ID: 85-0834175 to confirm telemedicine coverage.
Roswell is a city of approximately 92,000 in north Fulton County, on the Chattahoochee River roughly twenty miles north of Atlanta. Founded in 1839 by Roswell King around the Roswell Manufacturing Company, it grew as a textile mill village powered by Vickery Creek and later became one of metro Atlanta's most established suburbs. Roswell's allergen environment is shaped by two features that distinguish it sharply from neighboring cities on the same river: a shallow, marshy impoundment that replaced the river's rapids more than a century ago, and a steep tributary gorge that holds its own microclimate within the city.
Morgan Falls Dam was completed in 1904 by Georgia Power to supply electricity for Atlanta's streetcars, and raised in 1957 to regulate flow from Buford Dam thirty-six miles upstream. Its construction fundamentally changed the character of the river through Roswell, converting a narrow river with rapids into Bull Sluice Lake — a shallow reservoir of roughly 674 acres averaging about twenty-seven feet deep. Over the following century that impounded reach developed into wetland, and today it supports beavers, muskrats, migrating birds, waterfowl, songbirds, and numerous reptiles and amphibians. This is a fundamentally different water body from the cold, fast tailwater below the dam: slower, shallower, warmer, and far more biologically productive — which in a humid subtropical climate means a far heavier and more sustained fungal spore load.
Shallow standing water with marshy margins supports plant communities that upland forest does not. Cattails, sedges, rushes, smartweed, and wetland grasses colonize the shallows and shorelines around Bull Sluice Lake and along the river's marshy edges. Several of these are wind-pollinated and genuinely allergenic — cattails especially, releasing abundant pollen in late spring and early summer. Meanwhile the continuous decomposition of emergent vegetation in warm standing water produces fungal spores at rates well above those of drier bottomland forest. Roswell's wetland allergen profile is therefore both a pollen story and, more significantly, a mold story.
The Vickery Creek Unit — also known as Big Creek — is unusual among the fifteen units of the Chattahoochee River National Recreation Area in being bounded by a tributary rather than the Chattahoochee itself. Roughly seven miles of trails wind through a steep-sided gorge, with ridge-top paths sitting as much as a hundred feet above the creek. The Vickery Creek dam, originally built in 1836 to power the Roswell Manufacturing Company, still impounds the creek above a spillway waterfall, and the ruins of Ivy Mill remain along the trails. A covered footbridge constructed in 2005 connects the trail network to Roswell's Old Mill Park. Narrow shaded gorges retain moisture and stay cool and humid long after surrounding uplands dry, creating a concentrated pocket of humidity, leaf litter, and mold within the urban fabric.
Roswell has developed its outdoor amenities directly within this wetland system. The Roswell Riverwalk runs roughly seven miles combining boardwalk and paved greenway through marsh habitat along the Chattahoochee. The Chattahoochee Nature Center, a nonprofit operating for fifty years, occupies 127 acres of wetlands, native plant gardens, and trails. Riverside Park, Azalea Park, Don White Memorial Park, and Gold Branch across the water on Bull Sluice Lake add further access. These facilities draw heavy year-round use — which means substantial numbers of residents spend recreational time standing directly above shallow standing water and decomposing emergent vegetation.
Away from the water, Roswell is a long-established suburb with substantial residential tree cover: mature oak-hickory canopy across settled neighborhoods, with sweetgum, hickory, and pine throughout. This produces a compressed and intense tree pollen peak in late March and April, when oak, hickory, sweetgum, and birch release more or less together. Piedmont red clay underlies the uplands, draining slowly and holding moisture against foundations after the region's frequent heavy thunderstorms — compounding the humidity that the wetland system already supplies to low-lying neighborhoods.
Roswell's century-old impoundment converting the river into 674 acres of shallow wetland and driving a sustained fungal spore load, wind-pollinated emergent marsh plants including cattails and sedges adding a summer pollen source most inland suburbs lack, the Vickery Creek gorge holding a concentrated pocket of humidity and mold within the city, seven miles of boardwalk recreation placing residents directly over the wettest ground in the north metro, and dense mature oak-hickory canopy producing an intense spring peak create an allergy environment distinct from neighboring cities on the same river. HeyAllergy connects Roswell residents with board-certified allergists through telemedicine. Patients receive allergy blood testing, personalized treatment, and HeyPak® sublingual immunotherapy drops custom-formulated for Piedmont and wetland allergens. Treatment starts at $47/month. No needles, no clinic visits, no waitlist.
