OHIO STORMWATER ASSOCIATION
The Ohio Stormwater Association (OSWA) is a group of public and private citizens dedicated to advancing the management of stormwater and related natural resources through education, leadership, watershed-based coordination and technical assistance in Ohio.
The Ohio Stormwater Association provides educational and networking opportunities for people focused on reducing the negative impacts of stormwater runoff. The OSWA provides educational meetings on topics of interest to our members. OSWA supports the Ohio Stormwater Conference hosted each spring by the Tinker’s Creek Watershed Partners.
EXTREME WEATHER – A FREE WEBINAR FOR OSWA MEMBERS
Registration now open!
MS4 BOOTCAMP – A PRE-CONFERENCE TRAINING DAY
2025 OHIO STORMWATER CONFERENCE
Save the date: May 8-9, 2025 Ohio Stormwater Conference and May 7, 2025 for the pre-conference MS4 Bootcamp!
The Premier Event in Ohio and one of the Largest Stormwater Conferences in the Country
The conference has grown to more than 1,000 annual attendees over the past 17 years, hosted by the Tinker’s Creek Watershed Partners with the support of the Ohio Stormwater Association. The Ohio Stormwater Conference is an annual conference dedicated to advancing the knowledge and understanding of comprehensive stormwater management for those dealing in all aspects of planning, design, implementation, and regulatory compliance. The Ohio Stormwater Association and Tinker’s Creek Watershed Partners are looking forward to another great program with experts in the stormwater field sharing their knowledge and experience!
2025 OHIO STORMWATER ASSOCIATION AWARD NOMINATIONS ARE OPEN
Do you have a standout team member or exceptional project worthy of recognition? We invite you to share excellent achievements with us! Nominations are now being accepted for OSWA’s annual stormwater awards, to be presented at the Ohio Stormwater Conference on May 8-9 at the Kalahari Resort & Conference Center in Sandusky, Ohio. Submissions are due online by Friday, April 4, 2025.
OSWA MEMBER BENEFITS
The Ohio Stormwater Association (OSWA) members attend OSWA webinars for free, receive discounts to affiliated conferences, and qualify for discounts from the organizations listed on our Become a Member page.
Visit our Become a Member page to learn more about OSWA member benefits and join us today!
OHIO STORMWATER ASSOCIATION AFFILIATION: THE OHIO ENVIRONMENTAL PROTECTION AGENCY

OSWA PARTNERS WITH McMAHON DeGULIS LLP

The Ohio Stormwater Association (OSWA) is excited to announce a new collaboration with McMahon DeGulis LLP to provide regulatory support and information related to stormwater environmental regulations in Ohio.
Chamber USA stated that McMahon DeGulis is a “highly regarded boutique with expertise covering the full range of environmental law. [McMahon DeGulis] possesses particular strength in wastewater and brownfield matters, as well as integrated planning work related to the CWA.”
OSWA is excited to embark on this partnership with such a highly regarded Ohio environmental law firm, and we look forward to the benefit and insight that this will bring to our membership. Visit their website to learn more about McMahon DeGulis.