The current Particulate Matter (PM₂.₅) level at Santa Cruz is 6.64 µg/m³ , which is excellent. The air is clean and safe for everyone.
- Vehicle exhaust (especially diesel)
- Industrial emissions
- Residential wood burning
- Wildfires
- Construction and demolition dust
- Coal and biomass burning
- Secondary formation from gases like SO₂, NOx
The current Particulate Matter (PM₁₀) level at Santa Cruz is 9.71 µg/m³ , which is excellent. The air is clean and safe for everyone.
- Road dust and soil dust
- Construction sites
- Mining and agriculture
- Industrial grinding/crushing
- Pollen, mold spores
- Sea spray in coastal areas
The current Sulphur Dioxide (SO₂) level at Santa Cruz is 3.39 µg/m³ , which is excellent. The air is clean and safe for everyone.
- Coal-fired power plants
- Industrial boilers
- Oil refineries
- Ships using high-sulfur fuel
- Metal smelting
The current Nitrogen Dioxide (NO₂) level at Santa Cruz is 4.28 µg/m³ , which is excellent. The air is clean and safe for everyone.
- Vehicle engines (especially diesel)
- Heating systems
- Power plants (burning fossil fuels)
- Gas stoves (indoor NO₂)
- Industrial combustion processes
The current Ozone (O₃) level at Santa Cruz is 70.13 µg/m³ , which is acceptable. Sensitive individuals should take light caution.
- Car and truck exhaust
- Power plants
- Industrial solvents and paints (VOCs)
- Chemical manufacturing
- Gasoline vapors
- Lawn equipment
The current Carbon Monoxide (CO) level at Santa Cruz is 179.63 µg/m³ , which is excellent. The air is clean and safe for everyone.
- Incomplete combustion in vehicles
- Wildfires
- Gas stoves and heaters
- Cigarette smoke
- Wood burning stoves
- Faulty indoor appliances
- Daily
- Hourly

