Staff also review and approve plans for private sewage disposal systems before construction.
In addition, the division licenses about 2,700 individuals who either install or pump out private sewage disposal systems. The approximately 5,000 non-community water systems in Illinois must meet water quality standards established by the United States Environmental Protection Agency. It is the division's responsibility to review construction plans and to routinely inspect and sample these supplies. The division also investigates complaints about semi-private water systems. A pproximately 7,000 new water wells are constructed and 2,000 abandoned wells are sealed in Illinois each year.