Stormwater Quality

Press Enter to show all options, press Tab go to next option

There are two separate drainage systems in Peoria - the Wastewater (Sewer) System and the Stormwater System.


Wastewater System

Collects domestic wastewater (such as water from sinks, toilets, washers, etc.) from homes and businesses through sewer laterals and carries it through underground sewer pipes to a wastewater treatment plant where the water is treated and cleaned.

Stormwater System

Rainwater and excess irrigation water that fall on impervious surfaces like paved roads, rooftops and parking lots collects in the stormwater system, and travels to outfalls in natural and manmade washes.

Stormwater systems may include any combination of gutters, catch basins, underground pipes, retention basins, grass or concrete channels, and washes. These systems flow to our waterways without receiving any formal treatment. The city's primary discharge locations are the Agua Fria River, New River, ADOT drainage channels, community retention basins, and parks.

As the runoff flows over the land or impervious surfaces, it accumulates debris, chemicals, sediment or other pollutants that could adversely affect water quality if the runoff is discharged untreated. Everything dumped or drained to the stormwater system goes directly to our environment and can cause a wide array of pollution impacts.



The Streets Division is responsible for the repair and maintenance of the city’s Stormwater System.

The Building Development Division is responsible for evaluating stormwater controls at construction activities.
View Best Management Practices for Construction Site Runoff Control (EPA Website)
EPA: Stormwater Pollution Prevention for Small Residential Construction Sites (PDF)

Stormwater Quality compliance is managed by the Environmental Resources Division, Public Works-Utilities Department.

Stormwater Quality

Stormwater pollution from point sources and nonpoint sources is a challenging water quality problem. Unlike pollution from industry or sewage treatment facilities, which is caused by a discrete number of sources, stormwater pollution is caused by the daily activities of people everywhere.

The Federal Government mandated that cities take certain steps to ensure that stormwater is not contaminated. The Environmental Protection Agency (EPA) requires municipalities to permit their storm drain systems through the National Pollutant Discharge Elimination System (NPDES) program . The City of Peoria developed a Storm Water Management Plan (SWMP) to reduce, “to the maximum extent practical,” the discharge of pollutants.

Preventing Stormwater Contamination

The following video clips were produced by AZ STORM, a regional non-profit organization in the greater Phoenix Area. Find out how you can prevent storm water contamination in these short segments:

Mobile Businesses
Construction Sites
Illicit Discharge


Learn more about stormwater:

Frequently Asked Questions:

Expand/Contract Questions and Answers

  • How can I help prevent Stormwater pollution?

  • Vehicle Care and helping prevent Stormwater pollution?

  • Pool Draining and helping prevent Stormwater pollution?

  • Pet Waste and helping prevent Stormwater pollution?

  • Landscaping and helping prevent Stormwater pollution?

  • Pesticides and helping prevent Stormwater pollution?

  • Home Repair and Improvements and helping prevent Stormwater pollution?

  • Can I drain my pool water into the City's sewer system?


For more information contact:

Customer Service
7 a.m. to 6 p.m., Monday – Thursday
(623) 773-7160

Environmental Division
8 a.m. – 5 p.m., Monday – Friday
(623) 773-7561 or (623) 773-7286