If you're looking for a water treatment, water filtration or water cooler expert, give Chicagoland Water Conditioning & Purification; Cook a call. We are Lake & DuPage Counties most trusted water professionals. If you are needing water softening, office or home water coolers, water filtration systems or reserves osmosis for your water, it's important to choose a company you can trust. Since 1969 Chicagoland Water Conditioning & Purification has been faithfully servicing all your water needs. Our team of licensed and highly trained water professionals are fast, efficient and can handle just about any job. Big or small, from minor repairs to major installations, Chicagoland Water Conditioning & Purification does it all. When you hire Chicagoland Water Conditioning & Purification, you're assured quality service from a consummate professional.