TMDL Plan

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img_5768_0Willamette TMDL Program

What is a TMDL?
The Oregon Department of Environmental Quality (DEQ) sets the Total Maximum Daily Load (TMDL) of pollutants that can enter the Willamette River from local streams.  Newberg is part of a watershed that has 5 different streams.
 
Our TMDL Program covers pollutants that enter streams as runoff from driveways, streets, roofs, lawns, and fields.  Businesses are already familiar with limits for "end-of-pipe" or "point source" discharge and work with the City Pretreatment Program. 
 
Why is this important? Whenever people build towns, cultivate fields, or change wooded areas it impacts the rivers and streams. Developed areas have more sediment, oil, litter, feces, nitrogen, phosphorus, and other chemicals that runoff to streams.  This results in banks eroding, stream bottoms change into muck, invasive species and algae increases. This all affects aquatic life negatively and can even destroy it.  The TMDL helps to control the pollutants entering the Willamette River from our streams.
 
In 2006, DEQ required the City to reduce the temperature, bacteria, and mercury entering the Willamette River. This included six specific areas including public education, erosion control, infrastructure maintenance, and stormwater management. In 2021 more stringent requirements were issued for mercury in the Willamette River Basin  (see weblink below).   A progress report, available for download below, is sent to DEQ every year.Every 5 years, the City program is updated.  A summary previous 2 program cycles is available below along with the current 5-Year Plan 2018-2022.
 
You can help!  Keep stormwater drains clear, properly drain storm water, notify the City if you see anyone dumping anything in a manhole or stream. Always dispose of waste, trash, and chemicals properly.

Please contact environment@newbergoregon.gov for more information.


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Supporting Documents18 documents

  • 2022 City of Newberg TMDL Implementation Plan
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  • 2021 City of Newberg TMDL Implementation Plan
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  • 2020 City of Newberg TMDL Implementation Plan
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  • 2019 City of Newberg TMDL Implementation Plan
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  • 2018 City of Newberg TMDL Implementation Plan
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  • TMDL Imlementation Plan Matrix 2018 to 2022
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  • 2017 City of Newberg TMDL Implementation Plan with 5-Year Summary
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  • 2016 City of Newberg TMDL Implementation Plan
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  • 2015 City of Newberg TMDL Implementation Plan
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  • 2014 City of Newberg TMDL Implementation Plan
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  • 2013 City of Newberg TMDL Implementation Plan
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  • TMDL Implementation Plan Matrix 2013 to 2017
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  • 2012 City of Newberg TMDL Implementation Plan
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  • 2011 City of Newberg TMDL Implementation Plan
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  • 2010 City of Newberg TMDL Implementation Plan
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  • 2009 City of Newberg TMDL Implementation Plan
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  • 2009 City of Newberg TMDL Implementation Plan_Appendix A-D
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  • 2009 City of Newberg TMDL Implementation Plan_Appendix E-H
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