The Iowa Onsite Waste Water Association is one of the largest in the country, with about 400 members representing installation and maintenance contractors, regulators, engineers, soil scientists, manufacturers and educators. President Steve Darrah says such a broad base has helped IOWWA develop a good working relationship with interested groups to improve the certification program and onsite regulations, and help improve Iowa’s water quality.Darrah, owner of Crystal Heating and Plumbing in Waverly, took over as president of IOWWA at the beginning of 2013 after three years on the board of directors. He has 23 years of experience as an installer and
