Maranhão, Brazil
Penalva · Ubora wa hewa
Ijumaa, 13 Nov · America/Fortaleza
Penalva air quality
US air quality index
31Nzuri
US EPA scale
- Nzuri0–50Current category
- Wastani51–100
- Hewa yenye madhara kwa makundi nyeti101–150
- Hewa yenye madhara151–200
- Hewa yenye madhara makubwa201–300
- Hatari301–500+
A higher US AQI indicates more air pollution and greater health concern. Categories and pollutant concentration units are different measures.
Understand the EPA scaleVichafuzi vyote
- PM1
- 3 µg/m³
- PM2.5
- 7 µg/m³
- PM10
- 10 µg/m³
- Ozoni
- 48.7 µg/m³
- Dioksidi ya nitrojeni
- 1 µg/m³
- Dioksidi ya salfa
- 0.7 µg/m³
- Monoksidi ya kaboni
- 110.7 µg/m³
- European AQI (separate scale)
- 1