Biofiltration is a pollution control technique using living material to capture and biologically degrade process pollutants. Common uses include processing waste water, capturing harmful chemicals or silt from surface runoff, and microbiotic oxidation of contaminants in air.

Examples of biofiltration include;

• Bioswales, Biostrips, Biobags, Bioscrubbers, and Trickling filters
• Constructed wetlands and Natural wetlands
• Slow sand filters
• Treatment ponds
• Green belts
• Living walls
• Riparian zones, Riparian forests, Bosques