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Image:Pollutants image map.png|500px|thumb|alt=imagemap for stormwater BMPs|'''Pollutants in stormwater runoff'''. Mouse hover over an '''i''' box to read a description of the pollutant, or click on an '''i''' box to go to a page on the pollutant. | Image:Pollutants image map.png|500px|thumb|alt=imagemap for stormwater BMPs|'''Pollutants in stormwater runoff'''. Mouse hover over an '''i''' box to read a description of the pollutant, or click on an '''i''' box to go to a page on the pollutant. | ||
circle 100 500 30 [[Total Suspended Solids (TSS)|Total suspended solids, or sediment, originate from many sources including the erosion of pervious surfaces and dust, litter and other particles deposited on impervious surfaces from human activities and the atmosphere. Erosion at construction sites are also major sources of solids. Solids contribute to many water quality, habitat and aesthetic problems in urban waterways. Elevated levels of solids increase turbidity, reduce the penetration of light at depth within the water column, and limit the growth of desirable aquatic plants. Solids that settle out as bottom deposits contribute to sedimentation and can alter and eventually destroy habitat for fish and bottom-dwelling organisms. Solids also provide a medium for the accumulation, transport and storage of other pollutants including nutrients and metals.]] | circle 100 500 30 [[Total Suspended Solids (TSS)|Total suspended solids, or sediment, originate from many sources including the erosion of pervious surfaces and dust, litter and other particles deposited on impervious surfaces from human activities and the atmosphere. Erosion at construction sites are also major sources of solids. Solids contribute to many water quality, habitat and aesthetic problems in urban waterways. Elevated levels of solids increase turbidity, reduce the penetration of light at depth within the water column, and limit the growth of desirable aquatic plants. Solids that settle out as bottom deposits contribute to sedimentation and can alter and eventually destroy habitat for fish and bottom-dwelling organisms. Solids also provide a medium for the accumulation, transport and storage of other pollutants including nutrients and metals.]] | ||
− | circle 1800 500 | + | circle 1800 500 100 [[Chemicals of emerging concern in stormwater|Chemicals of emerging concern]] |
− | circle 2800 500 | + | circle 2800 500 100 [[Temperature in stormwater|Temperature]] |
− | circle 3800 500 | + | circle 3800 500 100 [[Organics in stormwater|Organics]] |
− | circle 100 1000 | + | circle 100 1000 100 [[Phosphorus|Phosphorus is a common constituent in urban stormwater. Sources include vegetative material (e.g. leaves), sediment from lawns, animal waste, fertilizers, road salt, lawn irrigation water, and other organic wastes. It is an essential element for plant life, but when there is too much of it in water, it can speed up eutrophication (a reduction in dissolved oxygen in water bodies caused by an increase of mineral and organic nutrients) of rivers and lakes.]] |
− | circle 1300 1000 | + | circle 1300 1000 100 [[Nitrogen in stormwater|Nitrogen]] |
− | circle 2850 | + | circle 2850 1000 100 [[Trash in stormwater|Trash]] |
− | circle 3800 1500 | + | circle 3800 1500 100 [[Metals in stormwater|Metals]] |
− | circle 100 1500 | + | circle 100 1500 100 [[Chloride in stormwater|Chloride]] |
− | circle 3800 1500 | + | circle 3800 1500 100[[Bacteria|Bacteria and pathogens]] |
</imagemap> | </imagemap> | ||
Information
Reporting phosphorus and TSS reduction credits from street sweeping
At this time, the MPCA has not developed guidance for how to credit reductions in phosphorus or total suspended solid loading associated with enhanced street sweeping. We anticipate developing this guidance in 2022. In developing this guidance, consider the following.