Stormwater Management Program

Due to the size of our population, the City of Casa Grande is required to conform to permit requirements for small municipal separate storm sewer systems (MS4 permit.)

In accordance with the MS4 permit, we recently created and implemented an SWMP intended to eliminate discharges of pollutants that may be transported by stormwater runoff. This program will maintain and enforce Minimum Control Measures to ensure compliance with the permit. The City's plan is available to download.

Our Stormwater Management Program (SWMP) is designed to prevent or reduce the pollutants in our stormwater runoff in order to protect the washes, streams, and retention basins.

Stormwater Tips

  • Properly dispose of pet waste and litter
  • Wash your vehicle at a car wash
  • Use the proper amount of fertilizer on your plants
  • Maintain your vehicles to prevent leaks

Submit SWMP Comments

Please submit your comments regarding Casa Grande's Stormwater Management Plan.

How We Keep Our Stormwater Clean

The City will implement an inclusive education and outreach program to reach a diverse population about how community members can take action to keep our water resources clean.

What is Stormwater?

Stormwater is considered any precipitation that falls from the sky - primarily in the form of rainfall in our desert climate.

When enough precipitation occurs, stormwater runoff can flow over the land, lawn, and impervious surfaces like roads and parking lots that do not allow the liquid to soak into the ground. As this runoff water travels, it picks up pollutants such as chemicals, oils, and debris, as well as soil and sediment.

The contaminated stormwater then enters washes, streams, and retention basins, posing a threat to wildlife and ultimately penetrating into our groundwater supplies. Controlling contamination to runoff is essential to maintaining our vital resources.

Stormwater Management