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Norwesco / Bushman / Poly-Mart Tanks


Norwesco is North America's leading manufacturer of proprietary rotationally molded polyethylene tanks for agricultural, water, closed-top industrial and below ground septic and cistern applications. Norwesco was founded in 1939 in St. Paul, Minnesota under the name of Northwest Plastics, Inc. The name was changed in 1973 and at that time Norwesco was ranked as one of the oldest and largest plastic processors in the United States.

Norwesco had been a publicly traded company until January 1988 when Norwesco was acquired and taken private by its management and private equity investors.  In 2008 we were acquired by Olympus Partners and became part of Tank Holding Corp. along with tank manufacturer Snyder Industries.  Most recently, Tank Holding Corp. acquired Poly-Mart Tanks which now joins the likings of Bushman Rainwater Harvesting, Norwesco, and Snyder Industries. 




Our water storage tanks have built in UV inhibitors in the resin to avoid color fading and break down from harsh sunlight. The Black, Dark Green, Dark Brown & Mocha colors limit the most light from entering the tank, which in turn reduces growth of waterborne algae. They all come standard with a screw on vented lid, inlet bulkhead and outlet bulkhead w/ plug. Water Storage Tanks are available in the following gallon sizes: 5000, 3000, 2500, 1500, 1000, 500, 250, 200, 150, 125, 100. All sizes are NRCS Approved!