May 11, 2021

Oregon Adopts Modified Industrial Storm Water General Permit

The permit regulates storm water discharges from over 830 industrial facilities in Oregon.


Oregon Department of Environmental Quality’s (DEQ’s) policy and rule-making board adopted rules renewing Oregon’s National Pollutant Discharge Elimination System (NPDES) Stormwater Discharge General Permit No. 1200-Z. 

According to the DEQ, this permit regulates industrial storm water discharges to waters of the state and the new 1200-Z General Permit will take effect Jul. 1, 2021, replacing the current 1200-Z General Permit issued Oct. 2018. 

According to The National Law Review, some of the key permit changes include: 

  • Expanding regulatory control of transportation sector discharges beyond the storm water from the limited areas regulated under the Clean Water Act (CWA), including requiring transportation facility vehicle maintenance shops, equipment cleaning operations, and airport deicing operations to control discharges from the entire site of the transportation facility.
  • Reducing monitoring for impaired waters by up to 38 different contaminants.
  • Framework for impairment monitoring exceedance response, which will no longer trigger Tier 1 corrective action and instead setting a parameter-specific response scheme. 
  • Benchmark monitoring changes.
  • Electronic reporting and increased visibility, which will be readily accessible to the public, including the location of the facility, storm water discharge locations, monitoring results, and storm water pollution control plans (SWPCPs).

According to DEQ, this permit regulates storm water discharges from industrial facilities that may reach Oregon waterways, directly or through conveyance systems. The permit currently covers over 830 industrial facilities in Oregon.

DEQ worked with an advisory committee of technical experts to investigate the feasibility of putting new limits on certain contaminants and the department also evaluated the feasibility to set discharge limits based on impaired waterbodies.

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