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Dushanbe | Pollen & Air Quality

Pollen Risk
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Pollen risk across Tajikistan
Pollen risk map of Tajikistan Interactive map showing pollen risk levels across regions and cities of Tajikistan
Major Cities
Sorted by risk level
Seasonal estimate · Open-Meteo weather data

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Seasonal Pollen Calendar — Tajikistan

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What is AllergyTJ?
AllergyTJ is a pollen risk estimation tool for Tajikistan, covering 30 cities across all regions of the country.
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How Weather Affects Risk
Hot, dry, windy conditions increase pollen dispersal and raise the risk score. Rain, snow, cold, and high humidity suppress airborne pollen and lower the score. The weather modifier adjusts the seasonal baseline to produce a final score from 0 (None) to 4 (Very High).
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Elevation Adjustment
Plants bloom later at higher elevations, a pattern first quantified by USDA entomologist Andrew Hopkins in 1918. His Bioclimatic Law established that biological events like flowering are delayed by about 2 days per 100 meters of elevation gain. The app applies this rate to shift the seasonal calendar for each city relative to the Dushanbe baseline (800m). Murghab at 3,618m sees bloom roughly 56 days later, while Bokhtar at 430m sees it about a week earlier.
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Regional Profiles

Pollen levels vary by region due to differences in vegetation and land use. The app groups cities into five zones:

  • Dushanbe/DRS: baseline, urban tree-heavy (poplar, plane tree)
  • Khatlon: agricultural lowlands, higher grass pollen (cotton, wheat, rice fields)
  • Sughd: Ferghana Valley, mixed orchards and rice, moderate across all types
  • GBAO/Pamir: sparse alpine vegetation, significantly lower pollen overall
  • Mountain valleys: mid-altitude, limited agriculture, moderate levels
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Risk by Time of Day

Weather conditions shift throughout the day, so pollen risk does too. The app splits the day into three periods:

  • Morning: 6 AM to 12 PM
  • Afternoon: 12 PM to 6 PM
  • Evening: 6 PM to 12 AM
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Cross-Reactivity Guide

Pollen allergies can trigger reactions to certain foods — called Oral Allergy Syndrome (OAS). Proteins in these foods resemble pollen allergens, causing tingling or itching in the mouth.

  • Birch: apples, cherries, apricots, peaches, pears, hazelnuts, carrots, celery
  • Mugwort: celery, carrots, cumin, coriander, sunflower seeds, chamomile tea
  • Grasses: wheat flour, tomatoes, watermelon, melon, oranges
  • Ragweed: watermelon, cantaloupe, banana, zucchini, cucumber

Cooking or peeling usually eliminates the reaction, as heat breaks down the cross-reactive proteins.

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Air Pollutants Guide
  • Ozone (O₃): ground-level ozone forms when nitrogen oxides react with volatile organic compounds in sunlight. It irritates airways, triggers asthma, and increases sensitivity to allergens. Concentrations peak in the afternoon and at higher elevations, relevant across much of Tajikistan. WHO guideline: ≤100 µg/m³ (8-hour mean).
  • PM2.5 (Fine Particles): particles ≤2.5 micrometers — small enough to penetrate deep into the lungs and enter the bloodstream. Sources include vehicle exhaust, dust, and burning. Carries pollen fragments and directly aggravates allergy symptoms. WHO guideline: ≤15 µg/m³ (24-hour).
  • PM10 (Coarse Particles): particles ≤10 micrometers, including dust, pollen grains, and mold spores. Directly relevant to allergy sufferers — pollen grains are typically 10–100 µm. WHO guideline: ≤45 µg/m³ (24-hour).
  • Nitrogen Dioxide (NO₂): gas produced by vehicle engines and power plants. Inflames airways and increases susceptibility to respiratory infections and allergen sensitivity. WHO guideline: ≤25 µg/m³ (24-hour).
  • Sulfur Dioxide (SO₂): gas from burning fossil fuels and industrial processes. Constricts airways and can trigger asthma attacks, especially during outdoor physical activity. WHO guideline: ≤40 µg/m³ (24-hour).
  • Carbon Monoxide (CO): colorless, odorless gas from incomplete combustion. Reduces blood oxygen capacity at high concentrations. Less directly related to allergies but an important overall air quality indicator. WHO guideline: ≤4 mg/m³ (24-hour).
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Understanding US AQI

The US Air Quality Index is a standardized scale from 0 to 500.

  • Good (0–50): air quality is satisfactory
  • Moderate (51–100): acceptable, but sensitive individuals may be affected
  • Unhealthy for Sensitive Groups (101–150): at-risk groups should limit exposure
  • Unhealthy (151–200): everyone may experience effects
  • Very Unhealthy (201–300): health alert
  • Hazardous (301–500): emergency conditions
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Understanding UV Index

The UV (Ultraviolet) Index measures the intensity of ultraviolet radiation from the sun on a scale from 0 to 11+.

  • Low (0–2): minimal risk
  • Moderate (3–5): seek shade during midday
  • High (6–7): sunscreen, sunglasses, and protective clothing recommended
  • Very High (8–10): avoid midday sun exposure
  • Extreme (11+): take all precautions
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How AQI Data Works

The Air Quality Index (AQI) on this dashboard is computed from satellite data. Here is how each number is derived.

  • All readings come from CAMS (Copernicus Atmosphere Monitoring Service), a satellite-based atmospheric model operated by the European Union. It divides the globe into 45 km grid cells and updates every 12 hours. As of 2026, Tajikistan has no public ground-based air quality sensors.
  • The composite US AQI score equals the highest sub-index among six pollutants: fine particles (PM2.5), coarse particles (PM10), ground-level ozone (O₃), nitrogen dioxide (NO₂), sulfur dioxide (SO₂), and carbon monoxide (CO). If any single pollutant is elevated, it determines the overall score.
  • The WHO badge compares PM2.5 against two thresholds: the 24-hour guideline (15 µg/m³, the relevant standard for a current reading) and the annual target (5 µg/m³, a long-term exposure goal). Most of Central Asia exceeds the annual target year-round due to regional dust and arid climate.
  • CAMS reports a regional average across its 45 km grid cell, which smooths out local variation. Street-level pollution near roads and construction sites can be significantly higher than the satellite value, especially in dense urban areas with heavy traffic.

Reference: WHO Global Air Quality Guidelines (2021)

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Data Sources
Risk scores combine three inputs: a seasonal pollen calendar based on Tajikistan's known allergenic flora (poplar, willow, birch, plane tree, mulberry, grasses, mugwort, chenopod, ragweed), live weather data from Open-Meteo (temperature, humidity, wind, precipitation), and air quality data from Open-Meteo CAMS (US AQI with per-pollutant breakdown: PM2.5, PM10, ozone, NO₂, SO₂, CO).
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Limitations
As of early 2026, no public pollen monitoring stations have been identified in Tajikistan. Risk levels are estimates based on seasonal patterns and weather conditions, not measured pollen counts. Air quality data relies on atmospheric modeling (CAMS), not ground-based sensors, and may differ from platforms that use local monitoring stations. Elevation adjustments follow a general botanical rule and may not reflect exact local conditions.

Pollen Risk & Air Quality in Vakhsh

Vakhsh is located in Khatlon Province at 426m elevation. Bloom timing shifts by approximately 7 days compared to Dushanbe (800m baseline) due to elevation differences (Hopkins' Bioclimatic Law: ~2 days per 100m).

Dominant allergen categories

Seasonal Allergen Guide

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Poplar / Cottonwood (Tree 0.8×) — Low Moderate High Moderate Low — — — — — —
Willow (Tree 0.8×) — Low Moderate Moderate Moderate — — — — — — —
Birch / Alder (Tree 0.8×) — — Moderate Moderate Moderate — — — — — — —
Plane Tree (Tree 0.8×) — — Low Moderate Moderate Low — — — — — —
Mulberry (Tree 0.8×) — — — Moderate Moderate Moderate — — — — — —
Grass (general) (Grass 1.3×) — — — Low Very High Very High Very High Low — — — —
Mugwort (Artemisia) (Weed 1.1×) — — — — — Low Moderate Very High Very High Moderate — —
Chenopod / Pigweed (Weed 1.1×) — — — — — Low High Very High High Low — —
Ragweed (Weed 1.1×) — — — — — — Low High High Low — —

View real-time pollen and air quality data for Vakhsh on the dashboard above.