Stormwater Drainage System Services

The Stormwater Division has the regulatory authority and responsibility for planning, design, construction, maintenance, operation, National Pollutant Discharge Elimination System (NPDES) programs and education, and administration of the City’s stormwater drainage system and the services provided to users of the system. 

The stormwater drainage system is a City-maintained network of structures, ditches, channels, swales, basins, treatment systems, gutters, inlets, storm pipes, outfalls, ponds, creeks, rivers, wetlands, and any other stormwter facilities necessary, useful, or convenient for the orderly collection, conveyance, treatment, and disposal of stormwater runoff.

The Stormwater Division is administered in a manner similar to the Water, Wastewater, and Sanitation Divisions under the supervision of the Stormwater Coordinator.

Need to report illicit discharges, illicit connections, or illicit dumping activity? 

To report a release of materials that pose an immediate threat to life or a significant threat to the environment, please notify the following agencies immediately:

  1. Idaho Department of Environmental Quality (DEQ) via emergency dispatch services (911);
  2. The Stormwater Division at 208-298-3900 or; and
  3. Complete this online form.

Annual Reports

The Stormwater Coordinator shall provide the City Council with an annual report of the activities funded by stormwater user fees during the preceding year and a projection of the upcoming year's expenditures.

Not All  Water Is Treated Equally

The City of Lewiston has two separate water collection systems. The sanitary sewer system collects wastewater from sinks, toilets, showers, and washing machines that is transported through pipes and flows to the wastewater treatment plant (pictured above, left). Whereas storm drains carry water that remains untreated, directly into green spaces and the river (pictured above, right). 

The stormwater drainage system is not part of a treatment process at any point which is why it is vital that we all do our part to protect our water and environment by remembering to put “Only Rain Down The Drain”.