You used to be able to get an installer license in Illinois by simply writing a check. Requiring an exam and continuing education has improved the qualifications of installers and pumpers, and regulatory changes over the years have improved the quality of systems going into the ground.The Onsite Wastewater Professionals of Illinois was formed in 1997, in response to proposed septic code changes, according to Rick Maguire, past president of the group and former member of the Illinois Department of Public Health Onsite Wastewater Advisory Commission, and Steve Johnson, a founding OWPI member and current board member, who also chairs
