1450 W 550 N | 801.229.7500 | PUBLICWORKS@OREM.ORG
24-hour Storm Water Hotline: 801.229.7577
Emergency After Hours: 801.229.7070
About Storm Water

What is Storm Water?

Storm Water Structures

Storm Water Fees

Street Sweeping


Home Owner Resources

Business Owner Resources

Storm Water Quality Credit Program

Irrigation Map

Illicit Discharges

Construction SWPPP

Developing in Orem: Storm Water

Long-Term Storm Water Management

Good Housekeeping

Storm Water Management Plan

Storm Water Master Plan

Storm Water Ordinance

Storm Water System Design Manual

Illicit Discharges

Storm Water regulations define an “illicit discharge” as “any discharge to a Municipal Separate Storm Sewer (MS4) that is not composed entirely of storm water” (except exempted discharges). Common sources of non-storm water, dry weather discharges in urban areas include:

  • Apartments and homes
  • Car washes
  • Restaurants
  • Landfills
  • Gas stations
  • Manufacturing

These so called “generating sites” may potentially discharge sanitary waste water, septic system effluent, vehicle wash water, wash down from grease traps, motor oil, antifreeze, gasoline and fuel spills, among other substances. Although these illicit discharges can enter the storm drain system in various ways, they generally result from either direct connections or indirect connections.

Studies indicate that dry weather discharges contribute significant pollutants to receiving waters. The detection and elimination of illicit discharges are important to protect and restore urban waterways.This minimum control measure of the Storm Water Management Program is designed to reduce pollutants in storm water runoff to receiving waters. It requires the development and implementation of a program to identify and eliminate sources of illicit discharge and illegal dumping.

You can learn more about illicit discharges from this fact sheet published by the EPA.


The City has established a 24/7 hotline to report spills and other incidents. We encourage you to let us know about dumping and other activities that would negatively impact water quality downstream by calling 801-229-7577.

Calls to this number have already led to several cleanup actions and investigations. Thank you for keeping us informed. The next section features the most recent illicit discharges recorded in the City.

Recent Incidents

January 29, 2019 – A semi-truck oil pan was punctured on a construction site. The contaminated soil was disposed of properly.

December 19, 2018 – Oil from an automobile accident collected in a gutter and absorbent was put on the spill. The absorbent was not cleaned. A City sweeper picked up the absorbent.

December 19, 2018 – City staff noticed evidence of oil having leaked into the curb from a previous automobile accident.

December 12, 2018 – An employee was observed dumping mop water into a sump. The restaurant management has since trained employees to use floor drains or mop sinks to dispose of mop water.

November 29, 2018 – Someone lost several gallons of paint off of a vehicle or trailer resulting in several cans to open and spill all over the roadway. City crews responded by absorbing the spill with floor dry and sweeping it up.

Household Hazardous Waste Collection Resources

We realize that sometimes people turn to improper disposal practices because they aren’t sure what to do with certain wastes and chemicals around their home or business. We recommend that you visit the Utah County Health Department to learn how to take care of things like oil, antifreeze, paint and other items that may pose a risk to water quality.

Be aware that the City of Orem makes recycling of oil and antifreeze easy for Orem residents. You can drop small amounts of used oil and antifreeze at our Public Works Facility located at 1450 W 550 North. Just stop at the front desk, and they will direct you to the right place.