Our Goal is to Achieve the Highest Levels of Performance, Ethics, Integrity and Professionalism in the Wastewater Industry

"Lemna is definitely a leader rather than a follower. In addition, the LemTec Biological Treatment Process has over the years proven to be an excellent choice. The installation process is simple yet effective in its high degree performance and low maintenance cost."

~ B.L., New Hampshire

LEMNA Client

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.

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.

LET's commitment to the advancement of lagoon wastewater technologies directly impacts the way we we do business and deliver solutions to our various clients.