Compost is a nutrient-rich material (soil amendment) created by the natural decomposition of organic materials such as food scraps, yard trimmings, manure, and agricultural waste. Through controlled biological processes involving microbes, oxygen, and moisture, these materials break down into a stable product that can be used to enrich soil, improve plant growth, decrease stormwater runoff, and reduce the need for chemical fertilizers.

Composting helps manage organic waste sustainably, reduces greenhouse gas emissions, conserves water, and supports local green industries.

In 2024, organic materials such as food residuals and yard trimmings made up around 26% of all municipal solid waste generated in the United States.

Composting Facility Regulations, Permitting and Guidance

Permits are required for most commercial composting operations. Below are relevant regulations, permitting documents, and guidance:

• Composting Facility Regulations
• Composting Facility Permitting Guidance
• Composting Exemptions and Basic Definitions
• Composting Facility Permit Overview
• General Composting Facility Permit
• General Composting Facility Permit Application
• Individual Composting Facility Permit Application
• Composting Facility Operations Plan Checklist
• Composting Facility Permitting Requirements by Facility Type
• Composting Facilities with Capacities 2025
• Composting Facilities Annual Report Form​