A couple wanted to build their five-bedroom dream home on the Payette River in Emmett, Idaho. The Gem County Health Department mandated pretreatment due to high groundwater and nitrogen limitations, and provided a short list of approved products.The couple contacted Ryan Spiers of Alternative Wastewater Systems in Caldwell. “I had recently installed the first BioBarrier membrane bioreactor from Bio-Microbics and knew it would work well at this site,” he says. The agency agreed. The unit is certified NSF/ANSI 40 Class 1, NSF/ANSI Standard 245 (nitrogen reduction), and NSF/ANSI Standard 350 Class R (water reuse).Site conditionsSoils are loamy sand with the
