Stormwater

Stormwater Runoff

When it rains, stormwater washes over the ground, streets, parking lots, and buildings, picking up a variety of pollutants, such as oil, pesticides, trash, metals, bacteria, and soil. Water that does not infiltrate the soil then travels through the City’s storm system and is discharged untreated into nearby streams and rivers.

A Municipal Separate Storm Sewer System (MS4) is simply a system of conveyances for routing stormwater runoff. Components of an MS4 system include streets, ditches, curbs, gutters, inlets, catch basins, paved or unpaved channels, culverts, and storm drains. The City of Oronogo’s MS4 is regulated under the Clean Water Act. As part of the MS4 Permit, the City has created a Stormwater Management Plan (SWMP) that includes Best Management Practices (BMPs) addressing potential sources of pollutants in stormwater. The implementation of BMPs in the SWMP will satisfy the six Minimum Control Measures (MCMs) required by the Phase II Regulations.

Residents – Public Education

• Be Stormwater Smart - Steps for Residents

• Stormwater Smart - video below

• Stormwater for Kids - Freddy the Fish video below

• Construction in Your Community

• Report Illegal Dumping and Illicit Discharges, or Stormwater Problems, Questions, or Concerns

MS4 Program Documents

• Stormwater Management Plan
• MS4 Outfall Map
• MS4 Outfall List
• IDDE Field Guide (for Illicit Discharge Detection and Elimination)
• IDDE Inspection Field Sheet

Construction and Engineering Resources

• Stormwater Management Design Manual
• Stormwater Plan Submittal Checklist
• Erosion and Sediment Control BMPs
• Stormwater Construction Inspection Procedures
• Stormwater Construction Inspection Checklist
• Post-Construction Stormwater Management - Long-Term BMP Inspection Checklists