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This page contains links to pages with information on specific pollutants found in stormwater.
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<Font size=3>'''Pollutants of Concern from Operations (adapted from CWP, 2005)'''.</font size><br>
Link to this [[Pollutants of concern from operations|table]].
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==Pollutants==
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[[Category:Level 2 - Pollutants/Chloride]]
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<font size=3>'''Summary of pollutants typically found in stormwater by source area'''</font size><br>
Link to this [[Summary of pollutants typically found in stormwater by source area|table]]
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...y of bioretention water quality cleansing mechanisms for common stormwater pollutants'''.</font size><br>
...y of bioretention water quality cleansing mechanisms for common stormwater pollutants|table]]
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[[Category:Level 2 - Pollutants/Chloride]]
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<font size=3>'''Processes for removing pollutants from stormwater runoff. Source: Design of Urban Stormwater Controls.'''</fo
Link to this [[Processes for removing pollutants from stormwater runoff|table]]
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<font size=3>'''Other Pollutants Reduced by Constructed Basins: Stormwater Ponds '''</font size><br>
Link to this [[Other Pollutants Reduced by Constructed Basins: Stormwater Ponds|table]]
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<font size=3>'''Typical pollutants found in stormwater collected from different source areas'''</font size><br
Link to this [[Typical pollutants found in stormwater collected from different source areas|table]]
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Materials and information on common pollutants found in stormwater.
*[https://www.pca.state.mn.us/water/water-pollutants-and-stressors Water pollutants and stressors]
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<font size=3>'''Summary of attenuation-removal mechanisms for primary pollutants found in stormwater runoff. Adapted from Horner, 1994 as reported in the [h
<th>Pollutants affected</th>
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...ential pollution prevention practices and the extent to which they control pollutants. Source: modified from the [http://www.cwp.org/ Center for Watershed Protec
<center><th colspan=7>Stormwater Pollutants Controlled</th></center>
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...echanism. Secondary (removal) means the BMP provides additional removal of pollutants for this mechanism even though the BMP was not designed for that purpose. A
<td colspan="6"><center>Not applicable - pollutants not exposed to stormwater</center></td>
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<font size=3>'''Stormwater Pollutants Associated With Common Operations at Potential Stormwater Hotspots</font si
Link to this [[Stormwater Pollutants Associated With Common Operations at Potential Stormwater Hotspots|table]]
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[[Category:Level 2 - Pollutants/Chloride]]
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[[Category:Level 2 - Pollutants/Chloride]]
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[[Category:Level 2 - Pollutants/Chloride]]
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...size=3>'''Municipal pollution prevention practices and the extent to which pollutants are controlled by that practice. (Source: modified from the Center for Wate
<center><th colspan=7>Stormwater Pollutants Controlled</th></center>
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<font size=3>'''Typical stormwater pollutants, summary of sources and potential concerns for harvest and use'''</font siz
Link to this [[Typical stormwater pollutants, summary of sources and potential concerns for harvest and use|table]]
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[[Category:Level 2 - Pollutants/Concentrations, export, loads]]
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...mprove air quality. Plants can filter out particulate matter and air borne pollutants via uptake and absorption into plant tissue. A variety of airborne contamin
A study performed in Chicago, Illinois demonstrated that several air pollutants (Ozone, Nitrogen Oxide, Particulate Matter, and Sulfur Dioxide) were remove
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<font size=3>'''Practices for controlling pollutants in stormwater runoff'''</font size><br>
Link to this [[Practices for controlling pollutants in stormwater runoff|table]]
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[[Category:Level 2 - Pollutants/Chloride]]
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...llutant adsorbed to the solids. They are not effective in removing soluble pollutants. They typically do not provide any volume reduction.
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...her or seasonal conditions having a significant effect on the discharge of pollutants to [https://stormwater.pca.state.mn.us/index.php?title=MN_CSW_Permit_Sectio
...not effective in eliminating or significantly minimizing the discharge of pollutants to surface waters or groundwater or the discharges are causing water qualit
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[[Category:Level 2 - Pollutants/Chloride]]
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<font size=3>'''Event Mean Concentrations of pollutants in stormwater runoff by land use. Source: [https://bmpdatabase.org/national
[[Category:Level 2 - Pollutants/Phosphorus]]
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[[Category:Level 2 - Pollutants/Bacteria and pathogens]]
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<td>Computable Pollutants</td>
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...tion, vegetative components, and/or other appropriate technology to remove pollutants from storm runoff."> '''proprietary devices'''</span>.
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<td>Selection based on pollutant removal for target pollutants</td>
<td>Restricted for some target TMDL pollutants</td>
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...ant tool for retention and detention of stormwater runoff and treatment of pollutants in stormwater runoff. If the practice utilizes vegetation, additional benef
...ate, is a preferred practice for managing stormwater runoff, as it reduces pollutants reaching receiving waters and retains water on the landscape|alert-success}
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...ate, is a preferred practice for managing stormwater runoff, as it reduces pollutants reaching receiving waters and retains water on the landscape|alert-success}
...iculate phosphorus, metals, bacteria, nitrogen, and most organics. Soluble pollutants such as chloride and nitrate typically through these BMPs and into underlyi
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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===Effect of aluminum and iron compounds on retention and fate of other pollutants===
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<Font size=3>'''This table shows nonpoint sources and pollutants associated with them. Source: (Adapted from [http://www.ene.gov.on.ca/stdpr
Link to this [[Pollutants associated with nonpoint sources|table]].
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*Pollutants
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...uch as streets, drains to storm sewers and eventually to lakes and rivers. Pollutants such as sediment and phosphorus are carried with the runoff water. Manageme
*[[:Information about common pollutants]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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...on stormwater infiltration, including BMPs overview, fate and transport of pollutants, and hydrologic effects of infiltration
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<Font size=3>'''Common pollutants of concern and sources in stormwater runoff. Adapted from USGS, 2014.'''</f
Link to this [[Common pollutants of concern and sources in stormwater runoff|table]].
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...that improve subwatershed water quality by minimizing the introduction of pollutants including sediment, nutrients, metals, bacteria, trash, oil, and toxins.</p
...effective in cold climates. Each practice varies in its ability to control pollutants generated from residential land uses. A variety of methods may be used for
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...removing water and pollutants. Rain gardens that have an underdrain filter pollutants, but most of the filtered water is captured by the drain and returned to th
...upport plants. The organic matter and clay are also effective at adsorbing pollutants from the runoff water.
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*Soil is a source of sediment and associated pollutants (e.g. metals, organic compounds) for stormwater runoff.
*Retain pollutants
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...and other debris from stormwater runoff through gravitational trapping of pollutants. They are typically used in combination with other structural BMPs, such as
*Pollutants of concern
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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...tions in the volume of runoff and have limited effectiveness for dissolved pollutants unless they are modified. They are suitable for all land uses, as long as t
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[[Category:Level 2 - Pollutants/Bacteria and pathogens]]
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*Ingestion of bio-accumulated pollutants in food crops irrigated with harvested water
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<font size=1><sup>1</sup> used for dissolved pollutants</font size>
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Sediment (total suspended solids)]]
[[Category:Level 2 - Pollutants/Concentrations, export, loads]]
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...d to reduce specific stormwater pollutants, but primarily solids and oils. Pollutants are captured physically or through sorption onto the filter media. Filters
*Pollutants of interest for reduction
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...atment:''' Practices that are used to remove fine particulates, dissolved pollutants and microorganisms from harvested rainwater.
...at is collected directly from roof surfaces which can have lower levels of pollutants than other sources of stormwater.
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[[Category:Level 2 - Pollutants/Chloride]]
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...on101_Toolkit_impairments-20200203_RGBforWebPrint.pdf Water Pollution 101: Pollutants & Stressors]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Chloride]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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<th>Pollutants removed</th>
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...of five (5) particle sizes (including one soluble fraction) and associated pollutants at a variety of BMP types.</td>
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...chemical treatment may also be employed for nitrogen, metals, and organic pollutants.
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<center><th colspan=7>Stormwater Pollutants Controlled</th></center>
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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==Types of contaminated sites and likely pollutants at contaminated sites==
...ownfields, a wide variety of pollutants can be present. Some of the common pollutants found at Superfund sites include, but are not limited to, industrial solven
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...tion reported; Reference: Roger T. Bannerman and Richard Dodds, Sources of Pollutants in Wisconsin Stormwater, 1992
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...removing sediments and solids by slowing the velocity of flow to allow the pollutants to settle out of the water column.
*Solids - Particulate pollutants consisting of sediments, debris and/or trash.
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<th>Pollutants removed</th>
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Chloride]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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...m bioretention soil media depths recommended to target specific stormwater pollutants. From [[References for bioretention|Hunt et al.]] (2012) and [[References f
...m bioretention soil media depths recommended to target specific stormwater pollutants |table]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Concentrations, export, loads]]
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[[Category:Level 2 - Pollutants/Chloride]]
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...anagement Practices (BMPs) are designed to collect sediment and absorb the pollutants, slow the destructively high flow rates, and/or decrease the volume of wate
Stormwater contains high levels of pollutants and sediment and will degrade a wetland over time. Also, the large volumes
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...e program developed by the permittee to manage and reduce the discharge of pollutants in stormwater to and from the small MS4.">'''Stormwater Pollution Preventio
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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[[Category:Level 2 - Pollutants/Concentrations, export, loads]]
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...ces. They have limited utility in removing suspended solids and associated pollutants and additional treatment is needed prior to discharge to the storage unit.
...erting initial stormwater flows to other drainage networks. A majority of pollutants in urban runoff are carried in the initial runoff from a site (MPCA Stormwa
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[[Category:Level 2 - Pollutants/Pollutant removal]]
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<td>'''Impaired Waters for Computable Pollutants'''</td>
<td>'''Impaired Waters for Non-Computable Pollutants'''</td>
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STEP 4: Determine from which TMDL the BMPs reduce pollutants
...ate the BMP with TMDLs. City A determines that the rain garden is reducing pollutants draining to the Lake 2 Phosphorous TMDL. City A indicates this with an “X
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...rksheet is to provide a guideline for which BMPs may reduce which types of pollutants. Actual pollutant reductions may vary. MPCA will update this worksheet as a
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...tion practices. Another complicating factor is that concentrations of some pollutants, such as nutrients, varies considerably during the year, with the result th
...es general conclusions on the effectiveness of street sweeping in removing pollutants. There is also a section on cost effectiveness of street sweeping compared
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...B.10). There are no additional requirements for waters impaired for other pollutants.
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[[Category:Level 2 - Pollutants/Chloride]]
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<th>Target Pollutants</th>
...of different types and sizes. The type of filter depends on the class of pollutants targeted for removal.</td>
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...sand filter bed (~18 inches), with temporary runoff storage above the bed. Pollutants are trapped or strained out at the surface of the filter bed. Discharge of
...s consist of a a layer or layers of media that filter suspended solids and pollutants associated with those solids. Water passes through the media to an underlyi
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[[Category:Level 2 - Pollutants/Phosphorus]]
[[Category:Level 2 - Pollutants/Concentrations, export, loads]]
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...stall pollution prevention projects that educate community members, reduce pollutants from runoff, and allow more water to soak into the ground.
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<th>Pollutants</th>
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...concentration; Reference: Roger T. Bannerman and Richard Dodds, Sources of Pollutants in Wisconsin Stormwater, 1992<br>
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