Air Quality Dashboard

View the latest air-quality readings and compare weekly and monthly averages among selected stations.

Hold down the Ctrl key on Windows, or the Command key on Mac, to select more than one station.
Weekly averages: 29 Jun 2026 to 19 Sep 2026
Monthly averages: 01 Oct 2025 to 19 Sep 2026

Miyanawita-Deraniyagala

Latest reading: 19 Sep 2026 at 01:46 PM
Carbon Dioxide (CO₂)
-1.0 ppm
Carbon Monoxide (CO)
17.0 ppm
Ammonium (NH₄)
71.0 ppm
Methane (CH₄)
10.0 ppm
Sulfur Dioxide (SO₂)
18.0 ppm

Weekly Average Comparison – Last 12 Weeks

Each chart point represents the average of all readings received during that week. Each week begins on Monday.

Carbon Dioxide (CO₂) (ppm)

Carbon Monoxide (CO) (ppm)

Ammonium (NH₄) (ppm)

Methane (CH₄) (ppm)

Sulfur Dioxide (SO₂) (ppm)

Monthly Average Comparison – Last 12 Months

Each chart point represents the average of all readings received during that month.

Carbon Dioxide (CO₂) (ppm)

Carbon Monoxide (CO) (ppm)

Ammonium (NH₄) (ppm)

Methane (CH₄) (ppm)

Sulfur Dioxide (SO₂) (ppm)

This dashboard automatically refreshes every 10 minutes.