The Olentangy River Watershed
The Olentangy River flows 88.5 miles from its headwaters in Crawford and Richland County through Marion and Morrow County into the City of Delaware and ending in Franklin County at its confluence with the Scioto River. The Olentangy River has a drainage area of 536 square miles. Twenty-two miles of the Olentangy were designated a state Scenic River by the Ohio Department of Natural Resources in 1973. The designation runs from the Delaware Dam, north of the City, to the old Wilson Bridge Road in Worthington.

2020 Events

7th Annual NOW Festival June 20
The 8th Annual Northern Olentangy Watershed Festival is Saturday, June 20, at Mingo Park, 500 E. Lincoln Avenue, Delaware. The festival encourages land and water stewardship with a focus on the Upper Olentangy River Watershed. The event will have food trucks, raffle prizes, information booths from environmental organizations, a guided nature walk, live music, free canoeing, a rain barrel raffle, a rubber duck race on the Olentangy River, live river critters, and more! Please mark your calendar for this awesome, annual program.

Event Schedule
For more information email Caroline Cicerchi.

Rain Barrel Workshops
The Public Utilities Department will host a rain barrel workshop during First Friday downtown in May and June. Participants will receive coupons for 50-gallon EarthMinded barrels.

Olentangy River Watershed Success Stories

Olentangy River Clean-up: August 24, 2019

The City of Delaware Public Utilities Department, Keep Delaware County Beautiful, and the Ohio EPA partnered for the annual river clean-up. T-shirts were provided to participants from the EPA grant that was awarded. TranSystems donated snacks and refreshments to the program.

  • A total of 74 volunteers attended
  • 2,200 pounds of trash collected
  • 12 tires (including some shredded pieces) total
  • Roughly 65 bags of trash collected
  • 860 lbs of scrap metal recycled to Sims Brothers, which generated $42.47 that was donated to the Olentangy Watershed Alliance.

Bio-Retention Cells on OWU Campus
Two bio-retention cells were installed in Spring 2018 on the campus of Ohio Wesleyan University, near Branch Rickey Arena. Bio-retention cells are stormwater utilize soil, mulch and vegetation to treat runoff from impervious surfaces such as rooftops, sidewalks and roadways. All species in the gardens are native to Ohio, which minimizes the need for maintenance, watering and pesticides. The plants have a high moisture and pollutant tolerance that will allow for the uptake of nutrients. The flowers were carefully selected by city staff to attract a diversity of wildlife including Monarch butterflies, bees, hummingbirds and other pollinator species. The project was funded through the City’s storm water fund in compliance with with Ohio EPA.

50th Anniversary of Earth Day Celebrations

UPDATE: Difficult decisions are being made to protect the health and safety of our Delaware community and prevent the spread of the coronavirus, or COVID-19. After discussions with our local public health district, and following guidance from the Ohio Department of Health and Centers for Disease Control, events and programs in our community are being affected. Health experts are recommending that large gatherings in Ohio be canceled or postponed due to concerns over the spread of COVID-19. It is possible these events will be impacted. Check this page for updates or email

  • The Olentangy Watershed Alliance is partnering with Public Utilities, Keep Delaware County Beautiful, and the Delaware State Park to hold an Earth Day Program April 4th at the Delaware State Park from 11-1pm: Register here
  • Public Utilities is partnering with the Ohio Environmental Protection Agency (OEPA) and Keep Delaware County Beautiful on April 15th to hold a Blue Limestone Park Stream Clean-up from 4:30-5:30, registration can be completed by emailing Caroline Cicerchi at
    • A weather back-up date is scheduled for April 16th same time and place.
  • Public Utilities is partnering with OEPA and Ohio Wesleyan University to offer a career day program for high school and undergraduate students on April 21 at the Hamilton Williams Campus Center (40 Rowland Avenue, Delaware) from 11:30-1pm. Over a dozen organizations in water management will have information tables to provide insight into their role, organization, and the training it took to get there. Pre-registration is preferred and can be completed by emailing
  • Public Utilities and the Parks Departments are partnering to celebrate the 50th Anniversary of Earth Day. A tree planting is program is set for April 22nd from 4:30-5:30, at the southwest corner of the intersection of S. Houk Rd. and Boulder Drive (directly across from the Flats on Houk Apartments). Register here.

The Delaware, Knox, Marion, Morrow Joint Solid Waste District
The City of Delaware is part of the DKMM district, a political subdivision funded by a fee on solid waste generated within the district. DKMM funds programs that provide education about and alternatives to disposal of generated wastes.  These programs include: recycling, composting, education and awareness, solid waste environmental and monitoring and household hazardous waste, electronics and tire collections.  DKMM Special Collection Events

How Can You Protect Our Olentangy River Watershed?
Email City of Delaware Watershed/Sustainability Coordinator Caroline Cicerchi  or phone her at 740-203-1905.

Drains to River Brochure
Storm Water Quality Implementations Brochure
Pet Waste Removal Flyer
Sponsor a Rain Barrel

Watershed Newsletters
Winter 2020

Summer 2019
Spring 2019
Winter 2019
Fall 2018
Summer 2018
Spring 2018


Public Utilities Department225 Cherry StreetEmail740-203-1905
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