The Indiana Tax Court recently ruled on a significant case involving Indiana American Water Company, Inc. (INAW) and the Indiana Department of State Revenue. The court's decision, issued on October 27, 2026, addresses the applicability of two sales and use tax exemptions related to the production of tap water. This ruling affects INAW's operations and could have broader implications for similar utility companies across Indiana.

INAW, which serves nearly one million residents through over thirty public water systems, argued that certain equipment used in the production and delivery of tap water should be exempt from sales and use tax. The company contended that this equipment falls under the manufacturing equipment exemption and the environmental quality exemption as defined by Indiana law. The court's decision clarifies the boundaries of these exemptions and their application to public utilities.

The case arose after INAW sought a refund for sales and use taxes paid on equipment purchased between January 1, 2018, and December 31, 2020. The Indiana Department of State Revenue granted only a partial refund, leading INAW to appeal the decision. The court's ruling focused on the interpretation of the manufacturing process and the role of various components in that process.

Background

Indiana American Water Company, Inc. is a regulated water and wastewater utility that transforms raw water into potable and pressurized tap water, which is then delivered to customers. The company uses a range of equipment, including pipes, fittings, and valves, to construct and maintain its water systems. INAW argued that these items should be exempt from sales and use tax under Indiana Code § 6-2.5-5-3, which covers manufacturing equipment, and Indiana Code § 6-2.5-5-30, which pertains to environmental quality exemptions.

The dispute centers on whether the equipment used in the production process qualifies for these exemptions. INAW claims that the production of tap water continues beyond the water treatment plants and includes the initial sections of piping that convey water to customers. The Department of Revenue, however, argues that the production process ends at the treatment plant, and subsequent equipment is merely part of the distribution system.

After an administrative hearing, the Department denied INAW's protest regarding the tax exemptions, prompting the company to appeal to the Indiana Tax Court. The court was tasked with determining the applicability of the exemptions based on the definitions and legal standards set forth in Indiana law.

The Ruling

The Indiana Tax Court, presided over by Judge McAdam, ruled in favor of INAW in part, granting summary judgment regarding the manufacturing equipment exemption for the “first mile” of piping and accessories. However, the court denied summary judgment concerning the “last mile” of equipment and the environmental quality exemption. The ruling emphasized the ongoing nature of the production process, stating, “The uncontroverted facts show that INAW’s production of tap water is incomplete until at least the last time INAW takes active measures to pressurize the water or make it potable.”

The court recognized that INAW's process of creating tap water constitutes direct production, as it involves significant transformation from raw water to a distinct marketable product. However, the court noted that it could not definitively determine the role of the last mile of piping in the production process, leaving that question unresolved.

Judge McAdam's opinion highlighted the importance of understanding where the production process begins and ends. The court found that the manufacturing equipment exemption applies to the essential and integral equipment used to produce the final product, which in this case is potable, pressurized water. However, the ruling clarified that the exemption does not extend to distribution equipment that merely transports the finished product.

Impact

This ruling has significant implications for Indiana American Water Company and potentially for other utility companies in Indiana. By affirming that the first mile of piping is part of the production process, the court has set a precedent that may allow similar companies to seek tax exemptions for their equipment used in water production and delivery.

Moreover, the decision raises questions about how public utilities define their production processes and the equipment involved. The court's distinction between the first and last mile of piping could lead to further litigation as companies seek clarity on what constitutes essential and integral equipment in their operations.

What's Next

While the court's ruling provides clarity on certain aspects of the tax exemptions, it leaves open questions regarding the last mile of equipment. It is unclear whether INAW or the Department of Revenue will appeal the decision or if further related cases will emerge as other utilities assess their tax obligations. The ongoing legal landscape will likely continue to evolve as companies navigate these complex tax issues.