Stormwater Management

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Madison County Public Works is responsible for managing stormwater and drainage in unincorporated Madison County. Our goal is to protect the lands, waters, and citizens of the county by reducing contamination of stormwater runoff and addressing drainage and flooding issues.

What is Stormwater?

Stormwater runoff is generated when precipitation from rain and snowmelt flows over land or impervious surfaces (such as building roofs and paved surfaces) and does not infiltrate into the ground. Everyday activities such as driving, lawn and vehicle maintenance, and even walking your pet often cover surfaces with harmful materials. As the runoff flows over surfaces, it accumulates debris, nutrients, chemicals, sediment, or other pollutants that adversely affect water quality if the runoff is directly discharged untreated into nearby water bodies. In addition to stormwater quality concerns, increased impervious areas can cause flooding in urban and suburban areas. As more impervious surfaces are built, the volume and velocity of runoff also increase.


The primary method to control stormwater discharges and runoff is the use of best management practices (BMPs), pollution prevention activities, and habitat/wetland preservation or restoration. Click here for Information on How You Can Do Your Part and visit Create A Clean Water Future to learn more about stormwater pollution from activities such as lawn maintenance and car washing. For construction and post construction BMPs, please reference the Alabama Handbook for Erosion Control and Sediment Control and Stormwater Management.

Stormwater Impacts

Possible negative impacts of stormwater runoff include:

  • Flooding – Increased volumes of stormwater can lead to damage of public and private property and can threaten public safety by flooding roadways.
  • Erosion – Higher stormwater velocities can cause bare ground and stream banks to erode causing sediment filled waterways and widened stream channels resulting in fish kills and loss of valuable property.
  • Aesthetics – Stormwater pollution can cause dirty water filled with trash, debris, or harmful chemicals and sometimes can cause unpleasant odors.
  • Fish and Aquatic Life – Polluted waters can kill fish and aquatic animals or contaminate the fish that we eat.
  • Economic and Recreational Impacts – Impairments to waterbodies often effects fisheries, tourism, and recreation related businesses as well as recreational uses of waterbodies for swimming, fishing, and boating.
  • Drinking Water - Stormwater pollution can increase the cost to treat water resources to provide safe drinking water. This cost increase typically results in higher prices for customers.

Regulating Stormwater

As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program controls water pollution by regulating point sources that discharge pollutants into waters of the United States. Point sources are discrete conveyances such as pipes or man-made ditches. Individual homes that are connected to a municipal system, use a septic system, or do not have a surface discharge, do not need an NPDES permit; however, industrial, municipal, and other facilities must obtain permits if their discharges go directly to surface waters. In most cases, the NPDES permit program is administered by authorized states. Since its introduction in 1972, the NPDES permit program is responsible for significant improvements to our Nation's water quality.

Municipal Stormwater Sewer System (MS4)

Madison County is required by the Alabama Department of Environmental Management (ADEM) and the United States Environmental Protection Agency (EPA) to operate under a general NPDES permit and implement a Stormwater Management Program (SWMP) to reduce the contamination of runoff within its stormwater management area to the maximum extent practicable. 

Please see the following documents and links associated with Stormwater Management in Madison County:


Madison County NPDES General Permit

Madison County Stormwater Management Plan

Madison County 2018/2019 Annual Report


 Click here to view the City of Madison Stormwater Management program.

 Click here to view the City of Huntsville Stormwater Management Program.

Construction Stormwater

The Clean Water Act and EPA regulations require construction site operators to obtain a NPDES permit to regulate land disturbance and stormwater discharges. ADEM established General NPDES Permit No. ALR100000 for discharges associated with construction activities. Construction projects that will disturb one or more acre of land disturbance or will disturb less than one acre but is part of a development or sale equal to or greater than one acre is required to operate under this permit.

Click here for guidance to Determine If Your Construction Site Needs a Stormwater Permit or visit ADEM’s website for more information.

Contact Us

For questions or concerns related to general stormwater permit and quality management (such as non-stormwater discharges, sediment from construction runoff, illegal dumping, etc.) as related to in unincorporated Madison County, please contact:

Ms. Alex Wynboom

Phone: (256) 746-2900


For questions or concerns regarding drainage conditions and stormwater runoff quantity as related to commercial or residential development in unincorporated Madison County, please contact:

Scott Medley

Phone: (256) 746-2925