While a rain storm may make us feel like the earth has been cleansed and renewed, a consequence of that rain is large amounts of pollutants including pesticides being washed into waterways. The list below contains a few of the problem areas.
Excess nutrients –
Bacteria and other pathogens Photo Credit https://www.tribuneindia.com/news/himachal/water-quality-in-rivers-poor-pollution-board-launches-plantation-campaign/791269.html
Trash & debris
Household hazardous wastes
According to the article in Science daily, “researchers analyzed 500 chemicals in urban stormwater collected during rainstorms. These Samples contained a median of 73 organic chemicals, with pesticides being the most frequently detected chemical group. Eleven contaminants, including the insect repellent DEET, nicotine, caffeine and bisphenol A, were found in more than 90% of samples. The researchers also frequently detected prescription and non-prescription pharmaceuticals, indicating that the stormwater was contaminated with human waste, possibly from sewage leaks or other urban sources.”
It has become evident that more and more contaminants are carried in stormwater at higher rates that initially thought.
Urban Stormwater: An Overlooked Pathway of Extensive Mixed Contaminants to Surface and Groundwaters in the United States
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Pollution in rivers, lakes and oceans has been in the news for years. Overloading of contaminates creates several different types of water problems. According to The Environmental Protection Agency “Polluted runoff occurs when rain, snowmelt, irrigation water, and other water sources move across and through land, picking up pollutants and carrying them into lakes, rivers, wetlands, coastal waters and underground sources of drinking water.” There are other issues as well, including acidification in oceans.
In an article in the Huffington Post, Pierce Nahigyan writes “The ocean absorbs about 30 percent of the CO2 emitted from human activities. As the volume of atmospheric CO2 grows, the ocean collects its proportionate share. To give you an idea of how much that is, in 2013, countries emitted nearly 40 billion tons of carbon. According to the World Meteorological Organization , that represents the biggest surge in CO2 concentration since 1984.”
SOURCE: Ocean Acidification Is Bad, and It’s Getting Worse
Photo Credit and article fond at Salinity from space unlocks satellite-based assessment of ocean acidification
posted Jan 16, 2015, 7:43 AM by Salinity CERSAT
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Applying for Stormwater Quality Credits
What is the credit available for stormwater quality management tools/practices?
Property owners can apply for a credit of up to 50 percent of their stormwater utility fee if they are using stormwater quality management tools/practices (often referred to as “Best Management Practice” or a “BMP”).
Common stormwater quality management tools (BMPs) include:
|Wet ponds||Manufactured underground filters||Rain gardens|
|Dry ponds||Vegetated swales||Infiltration trenches|
|Underground storage||Sand filters||Soak away pits|
|Wet or dry swales||Filter strips||Pervious pavers|
|Green roof||Dry wells|
You can learn more about stormwater quality management tools and practices from the Metropolitan Council’s
Urban Small Sites Best Management Practice Manual.” CREDIT MPLS Public Works