Stormwater Systems


Typical Stormwater, found in the City’s storm drain system is water from precipitation that flows across the ground and pavement when it rains, snows or when ice melts. The water seeps into the ground or drains into what we call storm sewers. These are the drains you see at street corners or at low points on the sides of your streets.Collectively, the draining water is called stormwater runoff and is a concern to us in commercial and industrial sites, as well as your neighborhood, because of the pollutants it carries. Stormwater is not treated once it enters the city storm sewers, therefore all of the untreated stormwater flows directly into the Yellowstone River.

Yellowstone River Intakes and Outfalls Map
Stormwater System Map

According to the 1996 National Water Quality Inventory, stormwater runoff is a leading source of water pollution. Stormwater runoff can harm surface waters such as rivers, lakes, and streams which in turn cause or contribute to water quality standards being exceeded. Stormwater runoff can change natural hydrologic patterns, accelerate stream flows, destroy aquatic habitats, and elevate pollutant concentrations and loadings. Development substantially increases impervious surfaces thereby increasing runoff from city streets, driveways, parking lots, and sidewalks, on which pollutants from human activities settle.
Common pollutants in runoff include pesticides, fertilizers, oils, metals, pathogens, salt, sediment, litter and other debris are transported via stormwater and discharged - untreated - to water resources through storm sewer systems.

Resolution 20-10888 FY 2021 Storm Sewer Fees

To help educate the community and keep our city streets and parks clean, we are also a proud partner of Bright n' Beautiful.

Have a concern or a question? Let us know with convenient online reporting & request forms:

  1. Environmental Affairs Office

    Phone: 406-247-8663

  1. Ditches & Drains
  2. Illicit discharge
  3. Permits & Regulations
  4. Shiloh Conservation Area

Ditches & Drains Overviewditch 1

Twenty-two ditches traverse Yellowstone County with six of those ditches located within the City limits. Many of the ditches are open waterways, however, there are several miles of culverts and pipes that carry ditch water beneath the city. In addition to ditches, there are also a series of open canals and piping that carry excess water away from the city during times of flooding, irrigation field runoff or for discharge of stormwater; these are called drains and are in various locations throughout the city. Ditches and drains are a valuable amenity to both the City and neighborhoods by providing natural water features, controlling stormwater runoff, and providing trail corridors. 

Ditch Contact List

Where does ditch water eventually end up?

It is important realize to that several of the ditches and all of the drains eventually discharge to the Yellowstone River. Dumping of yard wastes, chemicals, trash or debris can potentially cause flooding within the ditches and drains, backups in the City’s stormwater collection system, as well as pollute the Yellowstone River. 

Yellowstone River Intakes and Outfalls 

Who owns and maintains ditches?

The main ditches within the county are controlled and maintained through ditch easements by private ditch companies, not the City of Billings. Permission from the ditch companies is required to divert or alter the course of the ditches, construct ditch crossings, discharge stormwater into ditches, and to use irrigation water.

More information on responsibilities of landowners adjacent to the ditches can be found HERE

Where are ditches and drains located?

To view the ditches and drains located within Billings, click on the map link below:

Billings Ditches and Drains Map