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− | <font size=3>'''Typical | + | <font size=3>'''Typical concentrations of pollutants in stormwater runoff and snowmelt runoff for select cities'''</font size><br> |
Link to this [[Typical Annual and Snowmelt Urban Stormwater Quality Characteristics|table]] | Link to this [[Typical Annual and Snowmelt Urban Stormwater Quality Characteristics|table]] | ||
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<th rowspan=2>Constituent (concentrations reported in mg/L)</th> | <th rowspan=2>Constituent (concentrations reported in mg/L)</th> | ||
<th colspan=3>Annual</th> | <th colspan=3>Annual</th> | ||
− | <th colspan=4>Twin Cities | + | <th colspan=4>Twin Cities Snowmelt<sup>4</sup></th> |
</tr> | </tr> | ||
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<th>NURP<sup>5</sup></th> | <th>NURP<sup>5</sup></th> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
− | <td>Biological | + | <td>Cadmium </td> |
+ | <td></td> | ||
+ | <td> 0.0006</td> | ||
+ | <td>0.0004 </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Copper </td> | ||
+ | <td></td> | ||
+ | <td>0.022</td> | ||
+ | <td>0.016 </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Lead</td> | ||
+ | <td>0.060</td> | ||
+ | <td>0.049</td> | ||
+ | <td>0.032</td> | ||
+ | <td>0.16</td> | ||
+ | <td>0.2</td> | ||
+ | <td>0.08</td> | ||
+ | <td>0.18</td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Zinc</td> | ||
+ | <td></td> | ||
+ | <td>0.111</td> | ||
+ | <td>0.203</td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | <td> </td> | ||
+ | </tr> | ||
+ | <tr> | ||
+ | <td>Biological Oxygen Demand</td> | ||
<td> </td> | <td> </td> | ||
<td>15</td> | <td>15</td> | ||
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</table> | </table> | ||
− | <sup>1</sup> Event mean concentrations; Reference: Brezonik and Stadelmann 2002 | + | <font size=1><sup>1</sup> Event mean concentrations; Reference: Brezonik and Stadelmann 2002<br> |
− | + | <sup>2</sup> Geometric mean concentrations; Reference: Steuer et al. 1997<br> | |
− | <sup>2</sup> Geometric mean concentrations; Reference: Steuer et al. 1997 | + | <sup>3</sup> Geometric mean concentrations; Reference: Waschbusch et al. 1999<br> |
− | + | <sup>4</sup> Reference: Oberts, G. (Met Council). 2000. Influence of Snowmelt Dynamics on Stormwater Runoff Quality.<br> | |
− | <sup>3</sup> Geometric mean concentrations; Reference: Waschbusch et al. 1999 | + | <sup>5</sup> Reference: Median concentrations from more than 2,300 rainfall events monitored across the nation; EPA, 1983</font size> |
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− | <sup>4</sup> Reference: Oberts, G. (Met Council). 2000. Influence of Snowmelt Dynamics on Stormwater Runoff Quality. | ||
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− | <sup>5</sup> Reference: Median concentrations from more than 2,300 rainfall events monitored across the nation; EPA, 1983 | ||
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− | [[ | + | <noinclude> |
+ | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Cold climate]] | ||
+ | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Pollutant loading, concentrations, and characteristics]] | ||
+ | </noinclude> |
Typical concentrations of pollutants in stormwater runoff and snowmelt runoff for select cities
Link to this table
Constituent (concentrations reported in mg/L) | Annual | Twin Cities Snowmelt4 | |||||
---|---|---|---|---|---|---|---|
Twin Cities1 | Marquette MI2 | Madison WI | Storm Sewers | Open Channels | Creeks | NURP5 | |
Cadmium | 0.0006 | 0.0004 | |||||
Copper | 0.022 | 0.016 | |||||
Lead | 0.060 | 0.049 | 0.032 | 0.16 | 0.2 | 0.08 | 0.18 |
Zinc | 0.111 | 0.203 | |||||
Biological Oxygen Demand | 15 | ||||||
Chemical Oxygen Demand | 169 | 66 | 169 | 82 | 84 | 91 | |
Total Kjeldahl Nitrogen | 2.62 | 1.50 | 3.52 | 2.36 | 3.99 | 2.35 | |
Nitrate + Nitrite | 0.53 | 0.37 | 1.04 | 0.89 | 0.65 | 0.96 | |
Ammonia | 0.2 | ||||||
Total Phosphorus | 0.58 | 0.29 | 0.66 | 0.7 | 0.56 | 0.54 | 0.46 |
Dissolved Phosphorus | 0.20 | 0.04 | 0.27 | 0.25 | 0.18 | 0.16 | |
Chloride3 | 230 | 49 | 116 | ||||
Total Suspended Solids | 184 | 159 | 262 | 148 | 88 | 64 | |
Volatile Suspended Solids | 66 | 46 | 15 |
1 Event mean concentrations; Reference: Brezonik and Stadelmann 2002
2 Geometric mean concentrations; Reference: Steuer et al. 1997
3 Geometric mean concentrations; Reference: Waschbusch et al. 1999
4 Reference: Oberts, G. (Met Council). 2000. Influence of Snowmelt Dynamics on Stormwater Runoff Quality.
5 Reference: Median concentrations from more than 2,300 rainfall events monitored across the nation; EPA, 1983
This page was last edited on 5 August 2022, at 12:58.