Stormwater infiltration

Schematic showing an infiltration basin, which is one of several stormwater control practices designed to infiltrate stormwater runoff. Infiltration practices capture stormwater runoff and allow it to infiltrate into the underlying soil. Pollutant removal occurs through a variety of mechanisms, including adsorption, absorption, plant uptake, and degradation. Note that inflow into the practice has undergone pretreatment and that once the practice is filled, runoff bypasses the practice rather than entering it.

This page contains links to several pages that address infiltration of stormwater runoff. Link to portal for Infiltration Practices.

• Overview
• Pretreatment considerations for stormwater infiltration
• Best Management Practices (BMPs)
  • Overview of infiltration BMPs
  • Portal to information for different infiltration BMPs
• Water quality
  • Pollutant fate and transport in stormwater infiltration systems
  • Surface water and groundwater quality impacts from stormwater infiltration
• Water quantity
  • Groundwater mounding
• Separation distances
• Constraints
  • When infiltration is not authorized under a stormwater permit
  • Karst
  • Shallow soils and shallow depth to bedrock
  • Shallow groundwater
  • Soils with low infiltration capacity
  • Potential stormwater hotspots
  • Wellhead protection
  • Contaminated soils and groundwater
  • Procedures for investigating sites with potential constraints
  • Guidance for amending soils with rapid or high infiltration rates
• Decision tools
• Determining soil infiltration
  • Determining soil infiltration rates
  • Design infiltration rates
  • Understanding and interpreting soils and soil boring reports for infiltration BMPs
• References for stormwater infiltration
• Supporting material for infiltration