Industrial Systems Inc. is a full service sales and consulting company based in Billings, Montana. We serve the western United States including Montana, North Dakota, South Dakota, Wyoming, Idaho, Washington, Colorado, and Utah. Established in 1962, we have over 45 years of dedicated service in the water & wastewater industry. Our services include design, installation and project management services, troubleshooting, operations and maintenance, treatment, and on-site training. We provide quality service before and after the sale and we