Calculadora de Concentração de Particulados
Calcule a concentração de PM2.5 e PM10 no ar e nível de risco.
Estimated AQI
35
Estimated AQI vs PM2.5 Concentration
Formula
Particulate Matter and Air Quality
PM2.5 refers to fine particles smaller than 2.5 micrometers. These penetrate deep into the lungs and are the most health-relevant air pollutant.
AQI Estimation
AQI = PM2.5 (ug/m³) x 500 / 500.4
This is a simplified linear approximation. The actual EPA AQI uses piecewise breakpoints. Generally, 0-12 ug/m³ is Good (AQI 0-50), 12-35.4 is Moderate (51-100), and above 55.4 is Unhealthy (151-200).
Exemplo Resolvido
The local air quality monitor reads 35 ug/m³ PM2.5.
- 01Simplified AQI = 35 x 500 / 500.4 = 35 (approximately)
- 02Linear low-range AQI = 35 x 50 / 12 = 146
- 03In mg/m³ = 35 / 1000 = 0.035 mg/m³
- 04This falls in the Unhealthy for Sensitive Groups range
Perguntas Frequentes
What is PM2.5?
PM2.5 stands for particulate matter with a diameter of 2.5 micrometers or less. Sources include vehicle exhaust, industrial emissions, wildfires, and cooking.
What PM2.5 level is safe?
The WHO guideline is an annual mean below 5 ug/m³ and a 24-hour mean below 15 ug/m³. The US EPA standard is an annual mean of 9 ug/m³.
How does PM2.5 affect health?
Long-term exposure increases risks of heart disease, stroke, lung cancer, and respiratory illness. Even short-term spikes can trigger asthma and other acute effects.