Pond Contractors for Naperville, Wheaton, and all of Dupage County We are Pond builders that have been building Chicago’s Finest Custom Ponds, Pondless waterfalls, Water-gardens, Streams, Fountains, and Waterfalls for over 20 years. Whether it’s a simple container on your patio or an acre sized lake, GEM Ponds can turn your Landscape Ideas into reality. We can be your Pond Stars for the finest Custom Design, Installation and Maintenance! We invite you to browse through our site and feel free to contact us with any questions. GEM Ponds president George Janowiak has been designing, installing, and servicing some of Chicagoland’s finest custom Ponds, Water-Gardens, Fish ponds, Streams and Waterfalls.