City of Mexico Stormwater Management Plan

Stormwater Management:

The City of Mexico is a regulated small Municipal Separate Storm Sewer System (MS4) community.  As such, the City works alongside the Missouri Department of Natural Resources and the Environmental Protection Agency to prevent and/or minimize stormwater pollution.  To learn more about the MS4 Program, please visit the Missouri Department of Natural Resources' MS4 Webpage.

There are many parts, often referred to as Best Management Practices (BMPs), that make up the City's Stormwater Management Plan.  These parts range from public education and outreach to storm sewer mapping and good housekeeping.  The City's Stormwater Management Plan has been made available as a PDF for download here

Public Input:

Input from the public is a critical step to the City's Stormwater Management Plan.  If you have any questions or comments about this document, please contact the Engineering Division by using the online form here or by phone at 573-581-2100 ext. 3.

What you need to know if you're building in Mexico:

  1. Stormwater Overview
  2. Permits
  3. Design Process
  4. Plan Review
  5. During Construction
  6. Post Construction

Is the City's MS4 Program relevant to your construction site?

Please review Chapter 16 Article II of the Mexico City Code to determine if your site meets the criteria adopted through the City's MS4 program and associated Stormwater Ordinances.  A link to Section 16-21 (Applicability) of the City's Stormwater Ordinances may be found here.  If you have further questions about applicability, please contact the Engineering Division.

What if your construction site meets the City's MS4 applicability criteria?

Certain design requirements, calculations, and documentation will need to be submitted for review prior to the start of construction.  More details on these requirements may be found in subsequent tabs above.

What if your construction site does NOT meet the City's MS4 applicability criteria?

The stormwater design requirements, calculations, and documentation outlined in Chapter 16 Article II, and III will not be required.  This does not negate the need for good workmanship and personal responsibility on-site.  Should off-tracking of debris occur, pollution be found on-site, or other environmental concerns be noted, the City's Engineering Division will conduct an investigation of the construction site to determine what efforts may be needed for mitigating stormwater pollutants.  All other permits for the site will still be required and the contractor, as well as all subcontractors, must meet the City's Business License Requirements (contact the City Clerk for more details on Business License Requirements).  Examples could range from Building/Demolition Permits to a Floodplain Development Permit.