Since 1993, 30+ Years of Excellence
America's #1 Installer ofGeosynthetic Liner & Environmental Containment
500+ covered lagoon digesters. Three fabrication hubs. 50+ case studies. Industry-leading resources across biogas, liners, mining, and wastewater. Serving agriculture, food processing, and renewable energy nationwide.
Company News
EFI USA and EC Applications Have Merged
EFI USA and EC Applications (ECA) have joined forces to form one of the most comprehensive environmental containment companies in the United States. Both brands are here to stay, with the same teams and more combined capability from coast to coast.
EC Applications serves the West from Anaheim, Midland, and Sparks.
Trusted by industry leaders across agriculture, food processing, government, and renewable energy
Comprehensive Environmental
Containment Services
Biogas & Anaerobic Digesters
Flagship covered lagoon digester systems for biogas capture. 500+ installations, 82% US market share.
Learn More10.9M sq ft/yr capacityGeosynthetic Liners
HDPE, LLDPE, and RPP liner installation for containment, ponds, reservoirs, and landfills.
Learn More3 fab hubsFloating Covers
Custom-fabricated floating covers for odor control, algae prevention, and gas collection.
Learn More99% H₂S removalO₂ Injection & H₂S Removal
Proprietary micro-aeration systems that biologically convert hydrogen sulfide.
Learn More50+ installationsBaffle Curtains
Floating baffle curtain systems for water treatment and industrial ponds.
Learn More30+ years experienceMining Containment
Geosynthetic solutions for heap leach pads, tailings ponds, and process water management.
Learn More100+ facilities servedWastewater Solutions
Complete containment and cover systems for municipal and industrial wastewater treatment.
Learn More1 point of contactEPC Solutions
Full engineering, procurement, and construction. One contract, one team, one timeline.
Learn More500+ designs completedIn-House Engineering
Licensed PEs and PhD on staff. Proprietary database from 500+ installations powers every design.
Learn MoreOur Advantage
Why America's Top Companies
Choose EFI
Turnkey Solutions
Design, fabricate, install, and maintain. One company handles the entire lifecycle.
Unmatched Scale
500+ covered lagoon systems. 10.9M sq ft annual fabrication. The largest installer in the US.
Technical Expertise
Licensed PEs and a PhD on staff. Proprietary biogas database from 30+ years of operational data.
Nationwide Coverage
Three fabrication hubs — SC, TX, CA. Fast mobilization to any site in the continental US.
Client Trust
What Our Clients Say
“I am always pleased when you are the successful bidder on our cover projects because I know that the projects are completed on time and in a professional manner.”
W. James Wells
Technical Director, Food Industry
HDR Engineering
“As skeptical as we have been, we are now believers through our very own experience that your cover system does work. There is simply no odor that I or my staff can detect from this lagoon.”
W. A. Murray
Executive Officer
Spectrum Preferred Meats
“I have manufactured Water and Wastewater Biological Treatment Systems for over forty years. Now that I have used the Permeable Foam Covers, I am convinced that EFI has the best-engineered cover in the business.”
John Hinde
President
Air Diffusion Systems
Track Record
Featured Projects
Kennedy Space Center
Geosynthetic liner system for the deluge water basin supporting NASA launch operations. Engineered for extreme thermal and hydraulic loads.
Cape Canaveral, FL
Perdue Farms, Lewiston
Covered lagoon digester with biogas capture achieving 95% GHG emission reduction at one of the largest poultry processing operations on the East Coast.
Lewiston, NC
Diageo USVI Rum Distillery
Custom floating cover system for one of the world's largest rum distilleries, managing wastewater containment and odor control in a tropical marine environment.
St. Croix, USVI
Trusted by industry leaders across agriculture, food processing, government, and renewable energy
Ready to Start Your Project?
Get a free site assessment and custom proposal from our engineering team.
Or call us directly: (307) 264-0309
Get a Quote→Insights
Latest Insights
The pH Behind the H2S Number: Why the Same Sulfide Reads Differently at the Flare
Two covered lagoons with identical sulfur loading can read 1,200 ppm and 4,000 ppm at the flare. pH decides how much of the sulfide already in the water is free to leave it, and almost nobody logs pH next to the gas number.
Vacuum Under a Floating Cover: Air Intrusion and the Low Side of Pressure Control
A gas-tight floating cover operates within a few inches of water column of atmospheric pressure. The blower pulling gas off it can develop ten times that.
When the Air Stops: H2S Rebound and Recovery in Micro-Aerated Lagoons
H2S treatment on a micro-aerated lagoon is a bacterial film on the underside of the cover and inside the gas piping. When the air feed stops, sulfide generation does not, and the gas number climbs back far faster than the biology recovers.
Go Deeper
Explore More from EFI
Why Choose EFI
82% market share, 30+ years, 3 fabrication hubs. See what sets us apart.
Learn MoreCap-and-Flare Program
Zero-cost methane destruction with carbon credit revenue sharing for farms.
Learn MoreTechnical Specs
Liner specifications, cover system details, and flare equipment data sheets.
Learn MoreHow We Build
From design through commissioning -- our turnkey process explained step by step.
Learn MoreStay Connected
Follow EFI USA on LinkedIn for behind-the-scenes looks at installations, project updates, and technical insights.