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Daily Archives: December 12, 2012

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“Why use Percoa?”

According to the U.S. Environmental Protection Agency (EPA), about 90 percent of surface pollutants are carried by the first 1-1/2 inch of rainfall.

Storm water drains don’t typically channel this polluted runoff to treatment facilities, but instead convey it directly into local water bodies. Polluted runoff, if not diverted, ends up in our waterways along with water that is heated as it flows over paved surfaces and into the watershed. The concern being that temperature change in a stream or lake can harm aquatic plants and wildlife.

The use of pervious concrete (Percoa Slabs)is a widely accepted as an effective material to capture, filter and disperse storm water runoff and is among the Best Management Practices (“BMPs”) recommended by the EPA as well as by other agencies

Percoa’s proprietary, patented products can be used for new construction or to retro-fit existing concrete or asphalt surfaces such as storm water runoff basins, parking lots, driveways, walkways, patios, and a myriad of other surface applications where water runoff is a concern. Percoa combats the harmful effects of pollution entering the water supply, and helps reduce temperature changes.

Percoa Slabs because clean water is a global responsibility

The Dead Sea (in the Gulf of Mexico)

I just toured the Science Museum of Minnesota with a great group of 8th graders. One of the  demonstrations showed a large dead area in the Gulf of Mexico. “The Gulf of Mexico dead zone is an area of hypoxic (less than 2 ppm dissolved oxygen) waters at the mouth of the Mississippi River. Its area varies in size, but can cover up to 6,000-7,000 square miles. The zone occurs between the inner and mid-continental shelf in the northern Gulf of Mexico, beginning at the Mississippi River delta and extending westward to the upper Texas coast“.(




This dead zone is caused by  nutrient enrichment from the Mississippi River, particularly nitrogen and phosphorous. Watersheds within the Mississippi River Basin drain much of the United States. This is mainly caused by agriculture and soil erosion, this process is made worse by flooding and hurricanes. Chicago sewer is another large contributor. The Chicago area’s sewage has been found to be the biggest single contributor to the “Dead Zone” that has emerged in the Gulf of Mexico at the mouth of the Mississippi River – an area larger than the State of Connecticut noted Ann Alexander.

New regulations from the EPA are helping to clean up the mess we have all made. For every action there is a reaction we need to protect our waterways now before the damage is irreversible.



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