Difference between revisions of "Median pollutant removal percentages for BMPs"
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| − | <font size=3>'''Median pollutant removal percentages for several stormwater BMPs'''. [http://stormwater.pca.state.mn.us/index.php/Information_on_pollutant_removal_by_BMPs#References Sources]. More detailed information and ranges of values can be found in other locations in this manual, as indicated in the table.</font size><br> | + | <font size=3>'''Median pollutant removal percentages for several stormwater BMPs'''. [http://stormwater.pca.state.mn.us/index.php/Information_on_pollutant_removal_by_BMPs#References Sources]. More detailed information and ranges of values can be found in other locations in this manual, as indicated in the table. NSD - not sufficient data. '''NOTE''': Some filtration bmps, such as biofiltration, provide some infiltration. The values for filtration practices in this table are for filtered water.</font size><br> |
Link to this [[Median pollutant removal percentages for BMPs|table]] | Link to this [[Median pollutant removal percentages for BMPs|table]] | ||
| Line 40: | Line 40: | ||
<td>85</td> | <td>85</td> | ||
<td>50</td> | <td>50</td> | ||
| − | <td> | + | <td>85</td> |
<td>0</td> | <td>0</td> | ||
<td>35</td> | <td>35</td> | ||
| + | <td>80</td> | ||
<td>50</td> | <td>50</td> | ||
| − | |||
<td>80</td> | <td>80</td> | ||
</tr> | </tr> | ||
| Line 50: | Line 50: | ||
<td>[http://stormwater.pca.state.mn.us/index.php/Iron_enhanced_sand_filter_%28Minnesota_Filter%29 Iron enhanced sand filter]</td> | <td>[http://stormwater.pca.state.mn.us/index.php/Iron_enhanced_sand_filter_%28Minnesota_Filter%29 Iron enhanced sand filter]</td> | ||
<td>85</td> | <td>85</td> | ||
| − | <td> | + | <td>65 or 74<sup>6</sup></td> |
| − | <td> | + | <td>85</td> |
| − | <td>60</td> | + | <td>40 or 60<sup>6</sup></td> |
<td>35</td> | <td>35</td> | ||
| + | <td>80</td> | ||
<td>50</td> | <td>50</td> | ||
| − | |||
<td>80</td> | <td>80</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>[[Filtration|Dry swale]]</td> | + | <td>[[Filtration|Dry swale]] (no check dams)</td> |
<td>68</td> | <td>68</td> | ||
<td>[http://stormwater.pca.state.mn.us/index.php/Phosphorus_credits_for_bioretention_systems_with_an_underdrain link to table]</td> | <td>[http://stormwater.pca.state.mn.us/index.php/Phosphorus_credits_for_bioretention_systems_with_an_underdrain link to table]</td> | ||
| Line 65: | Line 65: | ||
<td>[http://stormwater.pca.state.mn.us/index.php/Phosphorus_credits_for_bioretention_systems_with_an_underdrain link to table]</td> | <td>[http://stormwater.pca.state.mn.us/index.php/Phosphorus_credits_for_bioretention_systems_with_an_underdrain link to table]</td> | ||
<td>35</td> | <td>35</td> | ||
| + | <td>80</td> | ||
<td>0</td> | <td>0</td> | ||
| − | |||
<td>80</td> | <td>80</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>[[Wet swale (wetland channel)|Wet swale]]</td> | + | <td>[[Wet swale (wetland channel)|Wet swale]] (no check dams)</td> |
| − | <td> | + | <td>35</td> |
<td>0</td> | <td>0</td> | ||
<td>0</td> | <td>0</td> | ||
<td>0</td> | <td>0</td> | ||
| − | <td></td> | + | <td>15</td> |
| − | <td></td> | + | <td>35</td> |
| − | <td> | + | <td>35</td> |
| − | <td></td> | + | <td>NSD</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>[[Stormwater ponds|Constructed wet ponds<sup>4</sup>]]</td> | + | <td>[[Stormwater ponds|Constructed wet ponds<sup>4, 5</sup>]]</td> |
<td>84</td> | <td>84</td> | ||
| − | <td>50</td> | + | <td>50 or 68<sup>5</sup></td> |
| − | <td> | + | <td>84</td> |
| − | <td> | + | <td>8 or 48<sup>5</sup></td> |
<td>30</td> | <td>30</td> | ||
| + | <td>60</td> | ||
<td>70</td> | <td>70</td> | ||
| − | |||
<td>80</td> | <td>80</td> | ||
</tr> | </tr> | ||
| Line 98: | Line 98: | ||
<td>0</td> | <td>0</td> | ||
<td>30</td> | <td>30</td> | ||
| + | <td>60</td> | ||
<td>70</td> | <td>70</td> | ||
| − | |||
<td>80</td> | <td>80</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td>[[Permeable pavement]]</td> | + | <td>[[Permeable pavement]] (with underdrain)</td> |
| + | <td>74</td> | ||
| + | <td>41</td> | ||
<td>74</td> | <td>74</td> | ||
| − | |||
| − | |||
<td>0</td> | <td>0</td> | ||
| − | <td></td> | + | <td>NSD</td> |
| − | <td></td> | + | <td>NSD</td> |
| − | <td></td> | + | <td>NSD</td> |
| − | <td></td> | + | <td>NSD</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| Line 119: | Line 119: | ||
<td>0</td> | <td>0</td> | ||
<td>0</td> | <td>0</td> | ||
| − | <td></td> | + | <td>NSD</td> |
| − | <td></td> | + | <td>NSD</td> |
| − | <td></td> | + | <td>NSD</td> |
| − | <td></td> | + | <td>NSD</td> |
| + | </tr> | ||
| + | <tr> | ||
| + | <td>[https://stormwater.pca.state.mn.us/index.php?title=Overview_for_pretreatment_vegetated_filter_strips Vegetated (grass) filter]</td> | ||
| + | <td>68</td> | ||
| + | <td>0</td> | ||
| + | <td>0</td> | ||
| + | <td>0</td> | ||
| + | <td>NSD</td> | ||
| + | <td>NSD</td> | ||
| + | <td>NSD</td> | ||
| + | <td>NSD</td> | ||
| + | <tr> | ||
| + | <td>[https://stormwater.pca.state.mn.us/index.php?title=Calculating_credits_for_stormwater_and_rainwater_harvest_and_use/reuse Harvest and reuse]</td> | ||
| + | <td colspan=8>Removal is 100% for captured water that is infiltrated. For water captured and routed to another practice, use the removal values for that practice.</td> | ||
</tr> | </tr> | ||
</table> | </table> | ||
| Line 129: | Line 143: | ||
<sup>2</sup>BMPs designed to infiltrate stormwater runoff, such as [[Infiltration basin|infiltration basin/trench]], [[Bioretention|bioinfiltration]], [[Permeable pavement|permeable pavement]] with no underdrain, [[Trees|tree trenches]] with no underdrain, and BMPs with raised underdrains.<br> | <sup>2</sup>BMPs designed to infiltrate stormwater runoff, such as [[Infiltration basin|infiltration basin/trench]], [[Bioretention|bioinfiltration]], [[Permeable pavement|permeable pavement]] with no underdrain, [[Trees|tree trenches]] with no underdrain, and BMPs with raised underdrains.<br> | ||
<sup>3</sup>Pollutant removal is 100 percent for the volume infiltrated, 0 for water bypassing the BMP. For filtered water, see values for other BMPs in the table.<br> | <sup>3</sup>Pollutant removal is 100 percent for the volume infiltrated, 0 for water bypassing the BMP. For filtered water, see values for other BMPs in the table.<br> | ||
| − | <sup>4</sup>Dry ponds do not receive credit for volume or pollutant removal | + | <sup>4</sup>Dry ponds do not receive credit for volume or pollutant removal<br> |
| + | <sup>5</sup>Removal is for [https://stormwater.pca.state.mn.us/index.php?title=Requirements,_recommendations_and_information_for_using_stormwater_pond_as_a_BMP_in_the_MIDS_calculator#Pollutant_Reduction Design Level 2]. If an iron-enhanced pond bench is included, an additional 40 percent credit is given for dissolved phosphorus. Use the lower values if no iron bench exists and the higher value if an iron bench exists.<br> | ||
| + | <sup>6</sup>Lower values are for Tier 1 design. Higher values are for Tier 2 design. | ||
</font size> | </font size> | ||
<noinclude> | <noinclude> | ||
| − | [[ | + | [[Category:Level 2 - Pollutants/Pollutant removal]] |
| + | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Pollutant removal]] | ||
| + | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Ponds and wetlands (constructed)]] | ||
</noinclude> | </noinclude> | ||
Latest revision as of 14:12, 3 August 2022
Median pollutant removal percentages for several stormwater BMPs. Sources. More detailed information and ranges of values can be found in other locations in this manual, as indicated in the table. NSD - not sufficient data. NOTE: Some filtration bmps, such as biofiltration, provide some infiltration. The values for filtration practices in this table are for filtered water.
Link to this table
| Practice | TSS | TP | PP | DP | TN | Metals1 | Bacteria | Hydrocarbons |
|---|---|---|---|---|---|---|---|---|
| Infiltration2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Biofiltration and Tree trench/tree box with underdrain | 80 | link to table | link to table | link to table | 50 | 35 | 95 | 80 |
| Sand filter | 85 | 50 | 85 | 0 | 35 | 80 | 50 | 80 |
| Iron enhanced sand filter | 85 | 65 or 746 | 85 | 40 or 606 | 35 | 80 | 50 | 80 |
| Dry swale (no check dams) | 68 | link to table | link to table | link to table | 35 | 80 | 0 | 80 |
| Wet swale (no check dams) | 35 | 0 | 0 | 0 | 15 | 35 | 35 | NSD |
| Constructed wet ponds4, 5 | 84 | 50 or 685 | 84 | 8 or 485 | 30 | 60 | 70 | 80 |
| Constructed wetlands | 73 | 38 | 69 | 0 | 30 | 60 | 70 | 80 |
| Permeable pavement (with underdrain) | 74 | 41 | 74 | 0 | NSD | NSD | NSD | NSD |
| Green roofs | 85 | 0 | 0 | 0 | NSD | NSD | NSD | NSD |
| Vegetated (grass) filter | 68 | 0 | 0 | 0 | NSD | NSD | NSD | NSD |
| Harvest and reuse | Removal is 100% for captured water that is infiltrated. For water captured and routed to another practice, use the removal values for that practice. | |||||||
TSS=Total suspended solids, TP=Total phosphorus, PP=Particulate phosphorus, DP=Dissolved phosphorus, TN=Total nitrogen
1Data for metals is based on the average of data for zinc and copper
2BMPs designed to infiltrate stormwater runoff, such as infiltration basin/trench, bioinfiltration, permeable pavement with no underdrain, tree trenches with no underdrain, and BMPs with raised underdrains.
3Pollutant removal is 100 percent for the volume infiltrated, 0 for water bypassing the BMP. For filtered water, see values for other BMPs in the table.
4Dry ponds do not receive credit for volume or pollutant removal
5Removal is for Design Level 2. If an iron-enhanced pond bench is included, an additional 40 percent credit is given for dissolved phosphorus. Use the lower values if no iron bench exists and the higher value if an iron bench exists.
6Lower values are for Tier 1 design. Higher values are for Tier 2 design.
This page was last edited on 3 August 2022, at 14:12.