The Rainwater and Land Development manual defines Ohio’s standards and specifications for stormwater management practices implemented during land development. The purpose of this manual is to provide professionals involved in the planning, design, and implementation of land development projects with guidance on how to select, design, and locate stormwater management practices that minimize the adverse impacts of stormwater runoff during and after construction.
Practices detailed in this manual are designed to ensure compliance with Ohio’s water quality laws, rules, regulations and policy. Apply these practices based on applicable regulatory requirements, project needs, and site-specific conditions or circumstances. Alternate methods may be available to satisfy a regulatory program requirement but may require the regulated entity to demonstrate the alternate method meets pertinent regulatory requirements.
Originally published by the Ohio Department of Natural Resources in 1996, the Rainwater and Land Development manual is provided by the Ohio Environmental Protection Agency in a series of chapters, subchapters, and appendices. The most current versions are made available for separate downloads through the links below.
The Rainwater and Land Development manual is periodically updated to include additional practices as well as new information on already included practices as research and development occur. Previous versions are archived below for reference.
PLEASE NOTE: A comprehensive revision of the Rainwater and Land Development manual (2006 version with updates through 2014) is currently in progress. New or updated chapters and subchapters will be individually posted throughout the revision process.
The following draft chapters are currently under technical peer review and available for comment:
Interested parties may submit peer review comments regarding the above drafts to Justin.Reinhart@epa.ohio.gov prior to 5:00 PM on April 16, 2021.