Drainage Compliance

Adoption of Lake County Watershed Development Ordinance


On October 13, 2020 the Lake County Board adopted 94 amendments to the County-wide Watershed Development Ordinance (WDO). The amendment is currently effective and includes the minimum County-wide standards for regulated development.

The amendments address FEMA, IEPA, and NPDES mandates
  • Administrative Related Clarifications
  • Drain Tile
  • Enhancements With Respect to Development
  • Floodplain
  • Wetland
All communities in Lake County were required to adopt the revised ordinance as a requirement of the National Flood Insurance Program (NFIP) and to maintain community certification status. The Village of Deerfield is currently a Class 6 community with respect to the NFIP and is designated a “Certified Community” by the Lake County Stormwater Management Commission (SMC). Certified Communities are those communities that have been delegated authority by the SMC under the WDO to administer all, or portions of, the WDO within their community limits.

You can view the Lake County Watershed Development Ordinance (WDO), which was adopted by the Village of Deerfield on March 15, 2021.

Site Grading & Drainage Ordinance


The Village of Deerfield has developed a user guide to assist in the uniform interpretation of the subject ordinance. These requirements and procedures establish a basis for the Village to utilize in the administration of the ordinances of the Village of Deerfield.

Read the Site Grading and Drainage Ordinance Manual (PDF).