Stormwater Management

What is Stormwater?

Stormwater runoff is generated from rain and snowmelt events that flow over land or impervious surfaces, such as paved streets, parking lots, and building rooftops, and does not soak into the ground. The runoff picks up pollutants like trash, chemicals, oils, and dirt/sediment that can harm our rivers, streams, lakes, and coastal waters. To protect these resources, communities, construction companies, industries, and others, use stormwater controls, known as best management practices (BMPs). These BMPs filter out pollutants and/or prevent pollution by controlling it at its source.

How to report a Stormwater Problem

If you are looking for assistance with road flooding, plugged road culverts, cleaning of storm drains, other “maintenance” type issues, or you want to report illegal discharges of oil, sediment, garbage, or other pollutants into surface waters or stormwater facilities, please call our Hotline number. To report an issue after normal business hours, please call the non-emergency dispatch (after hours) number.  City of Selah Public Works: (509) 698-7365

Reporting Illicit Discharges (S5.B.3.c.v)
To report a suspected illicit discharge in Selah, Sunnyside, Union Gap, or the County, call 509-574-2300 or email.

Illicit Discharge Requirements & Conditions

Illicit discharges are:

  • Hazardous waste
  • Liquid or solid wastes
  • Operational wash water
  • Septic or sewer connections

Under certain conditions, the following are not illicit discharges:

  • Dust control water
  • Lawn water
  • Permitted discharges covered under another permit
  • Street/sidewalk wash water
  • Swimming pool discharge – dechlorinated pool water only at undetectable levels (0.1mg/L).
  • Water line or hydrant flush water

Illicit discharges are not:

  • Air conditioning condensation
  • Uncontaminated crawl space pump discharge
  • Footing drains
  • Foundation drains
  • Ground water
  • Irrigation water from agricultural sources

Eastern Washington Phase II Municipal Permit Requirements:

City of Selah’s Permit # WAR04-6008

Mapping (S5B3.a.ix.)

City of Selah Storm Sewer System Map

Regional Stormwater Working Group-RSWG (S5.B.1)

The Yakima Regional Stormwater Group (RSWG) is an advisory group consisting of local elected or appointed officials from Yakima County, and the cities of Selah, Sunnyside, and Union Gap to oversee municipal staff efforts to regionally comply with stormwater permit requirements. Regular meetings are held quarterly at the Yakima County Courthouse. Due to COVID-19, meetings will be held virtually until further notice.  These meetings are open to the public therefore you will find updated meeting information, agendas & minutes “HERE”.

Public Education & Outreach

(To be updated soon)

EPA Watershed Academy

Public Involvement & Participation

(To be updated soon)

Selah’s Taylor Ditch TMDL Monitoring (S7.A.)

TMDL Action Plan 2018

Total Maximum Daily Load Process

Construction Site Stormwater Runoff Control (S5.B.5.a)

(To be updated soon)

Construction Tack Out Guidance (PDF)

Additional Resources:

NPDES Stormwater Program