Learn the Issues

Inert Reassessment Document for Petroleum wax, conforming to 21 CFR 172.886(d)

Reassessment Decision Document for Petroleum wax, conforming to 21 CFR 172.886(d)

EPA's Office of Inspector General

The Office of Inspector General is an independent office within EPA that helps the agency protect the environment in a more efficient and cost effective manner.

Biosolids Generation, Use, and Disposal in the United States

This report discusses the amount of biosolids generated in the United States and their subsequent use or disposal.

Biosolids

Explore key documents and learn about the scientific basis for biosolids management, including application to soils.

Domestic Septage Regulatory Guidance: A Guide to the EPA 503 Rule

Agricultural Land, Forests, and Reclamation Sites; Discussed in Relationship to Existing State Rules and Other Federal Regulations of Septage

Fact Sheet: Multi-Stage Anaerobic Digestion

Multi-stage anaerobic digestion can achieve superior performance relative to single-stage conventional digestion for most wastewater solids
and for all loading rates.

Fact Sheet: Land Application of Biosolids

Recycling biosolids through land application serves several purposes. It improves soil properties, such as texture and water holding capacity, which make conditions more favorable for root growth and increases the drought tolerance of vegetation.

Fact Sheet: In-Vessel Composting of Biosolids

In-vessel composting occurs within a contained vessel, enabling the operator to maintain closer control over the process in comparison with other
composting methods.

Fact Sheet: Centrifuge Thickening and Dewatering

Dewatering removes water and produces a drier material referred to as “cake” which varies in consistency.

Fact Sheet: Gravity Thickening

Fact sheet regarding thickening of solids

Fact Sheet: Belt Filter Press

Belt filter presses can be used to dewater most biosolids generated at municipal wastewater treatment plants and are a common type of mechanical dewatering equipment.

Fact Sheet: Alkaline Stabilization of Biosolids

Stabilization of biosolids helps to minimize the potential for odor generation, destroys pathogens (disease causing organisms), and reduces the material’s vector attraction potential.

Fact Sheet: Use of Composting for Biosolids Management

Biosolids Technology Fact Sheet on Use of Composting of Biosolids Management

Biosolids Recycling: Beneficial Technology for a Better Environment

This booklet briefly discusses important aspects of the Part 503 Standards for the Use or Disposal of Sewage Sludge

Basic Information about Sewage Sludge and Biosolids

Context for how biosolids and sewage sludge relate to each other, and how regulations provide a framework for use or disposal.

Examples of Equivalent Processes: PFRP and PSRP

Equivalent Processes: PFRP and PSRP

Chemicals Determined Not Likely to Present an Unreasonable Risk Following Pre-Manufacture Notification Review

This page describes the regulatory determination EPA has made following review of pre-manufacture notifications under section 5 of TSCA, as amended by the Frank R. Lautenberg Chemical Safety for the 21st Century law, P.L. 114-182.

TMDL for temperature in the Columbia and lower Snake Rivers

Total Maximum Daily Load (TMDL) for temperature in the mainstem Columbia and lower Snake Rivers.

EPA in Oregon

Environmental Information, hot topics, and public notices about EPA in Oregon.