Johnson's CreekOn September 11, 2014, Ohio EPA finalized the renewal of the small MS4 general permit, see below for more information. Over 100 communities in Northeast Ohio have been identified as Urban Areas by the 2010 Census and are now required to update their Storm Water Management Programs (SWMP) to reflect Ohio EPA’s updated Small Municipal Separate Storm Sewer Systems (MS4s) - General Permit. Here is a link to a map of these communities.

NOACA worked with Ohio EPA and representatives from the Northeast Ohio Stormwater Training Council (NEOSWTC) to develop new guidance materials to assist MS4 communities in updating their SWMPs to meeting the requirements of the revised General Permit and to consider the adoption of best management practices (BMPs) to address the pollutants of concern for the watersheds in their communities as identified in Ohio EPA’s Total Maximum Daily Load (TMDL) reports.

The guidance materials presented at the April 7, 2015 training included the following items:

  1. checklist guidance document for use by MS4 communities to review and update their Storm Water Management Programs (SWMPs) to Comply with Ohio EPA General NPDES Permit for Small MS4s #OHQ000003
  2. Community Identifier Table that all MS4s to look-up their community to determine which watersheds have USEPA approved TMDLs and what pollutant types of TMDLs apply to their community.
  3. Once a community has identified the types pollutants that have been identified in the TMDLs, the MS4 can utilize pollutant-specific Fact Sheets to identify and adopt Best Management Practices for each of the SWMP Minimum Control Measure (MCM) requirements.

            TMDL Pollutant Fact Sheets

Currently, the Chagrin River Watershed Partners are updating regional storm water management model codes; these updates are expected to be available late Summer 2015.

Contact Pamela L. Davis, Senior Water Quality Planner, at (216)-241-2414, extension 284 with any comments.

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Last updated: 6/9/2017 1:31:30 PM