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Air Quality Index (AQI) in Barreiros, Brazil 🇧🇷

Air quality in Barreiros is currently 59 on the US AQI scale, rated Good.

Light rain shower
23°C
Light rain shower
AQI INDEX
59
US EPA Standard

PM 2.5 Level
13.6
µg/m³

US EPA Index
1
Good
The current Air Quality Index (AQI) in Barreiros is recorded at 59 as of 10 o'clock at night local time this Monday, July 20, 2026. This real-time AQI score is based on the highest-risk pollutant measured by local monitoring stations. According to the US EPA health standard, air quality in Barreiros currently falls into the Moderate category. The PM2.5 pollution levels are currently measured at 13.6 µg/m³. While this AQI level is acceptable for most people, those who are unusually sensitive to air pollution should consider reducing prolonged or heavy exertion outdoors. If you are sensitive to air pollution, check the local weather before heading out. For the AQI across entire Brazil, you can also view the Air Quality Index for Brazil covering other major urban centers and local monitoring stations.

Health Recommendations for Barreiros Residents

Air quality is considered satisfactory, and air pollution poses little or no risk. It is a great day for outdoor activities in Barreiros.

Barreiros Air Pollution: Detailed Pollutant Breakdown

🌿
Good news — Barreiros's air today is cleaner than a single cigarette (about 0.6).
Based on the Berkeley Earth estimate that ~22 µg/m³ of PM2.5 over a day is about one cigarette. Today's PM2.5 in Barreiros is 13.6 µg/m³.
PM 2.5
13.6
µg/m³
PM 10
21.5
µg/m³
Nitrogen Dioxide (NO2)
2.6
µg/m³
Ozone (O3)
50.0
µg/m³
Carbon Monoxide (CO)
87.0
µg/m³
Sulfur Dioxide (SO2)
0.5
µg/m³

Current Weather in Barreiros

🌡️ 23°C (Feels like 17°)
🌬️ 10 km/h SE
💧 90% Humidity
🧭 1016 hPa
👁️ 10.0 km Visibility
☀️ UV Index: 0.0
🌅 Sunrise: 05:36 AM
🌇 Sunset: 05:17 PM
🌡️ Dew Point: 21°C

Barreiros's Main Air Pollutant Today

The main concern in Barreiros right now is PM2.5 at 13.6 µg/m³, about 0.9x the WHO 24-hour guideline.

Air Quality Health Advice for Barreiros

General publicAir quality is good. It is a great day to be active outside.
Sensitive groupsAir quality is good. Sensitive groups can enjoy normal outdoor activity.

Air Quality in Other Cities in Brazil

Browse Air Quality in Brazil by cities in alphabetical order:

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Air Quality in Brazil ›

Frequently Asked Questions about Air Quality in Barreiros

What is the air quality (AQI) in Barreiros right now?

The current air quality index in Barreiros is 59 — categorised as Good.

Is the air in Barreiros safe to breathe today?

Today's air quality in Barreiros is rated Good on the US EPA scale.

What is the PM2.5 level in Barreiros right now?

The fine-particle (PM2.5) concentration in Barreiros is currently 13.6 µg/m³. PM2.5 is the most health-relevant pollutant — the WHO 24-hour guideline is 15 µg/m³.

What is the PM10 level in Barreiros right now?

The coarse-particle (PM10) concentration in Barreiros is currently 21.5 µg/m³.

What is the main pollutant in Barreiros right now?

The dominant pollutant in Barreiros right now is Carbon Monoxide (CO) at 87.0 µg/m³.

Is it safe to exercise outdoors in Barreiros today?

With air quality currently rated Good, outdoor exercise in Barreiros is generally considered safe for most people.

How to Read the Air Quality Index for Barreiros

Good (0-50)

Air is fresh and healthy. Safe for all outdoor activities.

Moderate (51-100)

Acceptable air quality, though sensitive groups should monitor comfort.

Unhealthy (Sensitive) (101-150)

Vulnerable groups (children, elderly) should limit outdoor exertion.

Unhealthy (151-200)

Everyone begins to experience health effects. Stay indoors where possible.

Very Unhealthy (201-300)

Significant health impact for entire population. Emergency conditions.

Hazardous (301+)

Serious health alert: everyone may experience serious life-threatening effects.

Good (0-12)

Fine particles are at minimal, safe levels. Air is optimal.

Moderate (12-35)

Acceptable air, but haze may be present in urban areas.

Sensitive (35-55)

Individuals with heart or lung disease should limit activity.

Unhealthy (55-150)

Particulate levels high enough to cause respiratory irritation.

Very Unhealthy (150-250)

Heavy haze. High risk to cardiovascular health for the public.

Hazardous (250+)

Lethal particulate concentrations. Critical neurological and lung risk.

Good (0-54)

Low levels of dust and coarse particles. Environment is safe.

Moderate (55-154)

Coarse particles may trigger coughing in sensitive groups.

Sensitive (155-254)

Visible dust pollution. Sensitive groups should avoid heavy labor.

Unhealthy (255-354)

Widespread respiratory impacts likely for the population.

Very Unhealthy (355-424)

Dangerous dust and debris levels. Significant warnings issued.

Hazardous (425+)

Extremely high concentrations. Stay inside with filtration.

Good (0-54)

Surface ozone levels are within a safe, natural range.

Moderate (55-70)

Acceptable air, but sensitive individuals may feel chest tightness.

Sensitive (71-85)

Rising ozone can trigger airway inflammation in active children.

Unhealthy (86-105)

Avoid heavy outdoor work during the hottest part of the day.

Very Unhealthy (106-200)

Serious lung function reduction likely across the public.

Hazardous (201+)

Emergency ozone levels. Risk of permanent lung tissue damage.

Good (0-53)

Nitrogen levels are optimal. Safe for everyone.

Moderate (54-100)

Typical background levels for high-density urban areas.

Sensitive (101-360)

Increased risk of respiratory infections for vulnerable groups.

Unhealthy (361-649)

Significant airway inflammation likely near traffic zones.

Very Unhealthy (650-1249)

Acute respiratory distress potential. High-risk groups stay indoors.

Hazardous (1250+)

Toxic concentrations. Immediate health precautions required.

Good (0-4.4)

Carbon Monoxide levels are clean and non-toxic.

Moderate (4.5-9.4)

Acceptable; may affect those with specific heart conditions.

Sensitive (9.5-12.4)

Reduced oxygen delivery to the heart may occur.

Unhealthy (12.5-15.4)

Headaches and fatigue may occur in urban canyons.

Very Unhealthy (15.5-30.4)

Significant cardiovascular distress. Mental confusion possible.

Hazardous (30.5+)

Lethal potential. Immediate risk of neurological collapse.

Good (0-35)

Optimal air quality with no sulfur detection.

Moderate (36-75)

Acceptable air; minor odors possible near industry.

Sensitive (76-185)

Bronchoconstriction possible for active asthmatics.

Unhealthy (186-304)

Respiratory distress likely for the wider population.

Very Unhealthy (305-604)

Significant wheezing and shortness of breath likely.

Hazardous (605+)

Extreme respiratory danger. Significant life risk.

Health & Scientific Resources

→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air quality

How is this AQI calculated?

The primary Air Quality Index (AQI) shown above is calculated using the US EPA Linear Interpolation formula based on PM2.5 concentration (Fine Particulate Matter).

Formula: Ip = [(Ihi - Ilow) / (Chi - Clow)] * (Cp - Clow) + Ilow

Note: While several pollutants (O3, NO2, SO2) are monitored, PM2.5 is used as the primary "driver" for the main index value as it typically represents the highest health risk.

Frequently Asked Questions

What is the main cause of air pollution in Barreiros?

Pollution in Barreiros is primarily driven by 9.7 km/h SE winds, local traffic emissions, and industrial activity, which influence the current PM2.5 concentration of 13.6 µg/m³.

Is the AQI in Barreiros safe today?

Today's AQI is 59, which is categorized as Good. This means the air quality is good for the general population.