Lemna Environmental Technologies (LET)

LET specializes in providing simple wastewater treatment solutions for complex wastewater problems. Whether the problem is odor, algae, heat loss, gas collection, or meeting more stringent regulatory effluent limits for BOD, TSS, ammonia, phosphorous, and nitrogen, LET has a simple, effective, and innovative solution. Recognized as the market leader in lagoon based process technology and cover systems, LET’s expertise encompasses all aspects of wastewater project development from conceptual design to final commissioning and ongoing customer support. Our mission is to provide innovative and cost effective wastewater treatment solutions that enable municipal and industrial clients to protect water resources now and for the future.

Company details

4215 White Bear Parkway, Suite 200 , 4215 White Bear Parkway, Suite , MN 55110 USA

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Business Type:
Industry Type:
Water and Wastewater - Water Treatment
Market Focus:
Nationally (across the country)

This company also provides solutions for other industrial applications.
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We deliver on this mission through design expertise and a full product line that address the multiple needs municipalities, engineers and contractors have for wastewater treatment. With over 30 years of experience, we have earned a solid reputation for superior customer service and the ability to provide economical solutions tailored to fit our client’s specific needs.

Lemna Environmental Technologies (LET) was founded over 30 years ago with the vision of developing simple, innovative and sustainable wastewater treatment solutions for municipal and industrial clients. Starting with a unique, patented, duckweed process, from which the name Lemna is derived, LET has continued to develop processes and products that enable clients to protect their water resources now and for the future. With over 300 installations currently operating, LET’s expertise encompasses all aspects of wastewater project development, from conceptual design and product supply to final commissioning and ongoing customer support.

Currently, LET offers innovative designs and products ranging from simple, facultative lagoons to state-of-the-art, aerated lagoon systems capable of meeting the most stringent effluent requirements. Over the years, we have expanded our design capabilities and product line to help clients effectively meet the challenges of more stringent effluent limits for BOD, TSS and ammonia and to address problems of odor control, heat retention and gas collection.

With new ownership in place as of November 2014, a new office location, and an updated production facility, LET is poised to expand its reach further into the wastewater industry. Our full-time staff of environmental engineers and state-of-the-art design facility allows us to offer a variety of technical solutions tailored to fit our clients’ specific needs.