Revenue
Our revenue decreased $151.1 million, or 13.0%, to $1.0 billion for the Current Period compared to $1.2 billion for the Prior Period. The decrease was primarily due to $83.8 million lower revenue from the combination of our Affirm subsidiary, sand hauling operations and Canadian operations, all of which were fully divested and wound down during the Current Period. Also impacting the change was $66.3 million lower Water Services revenue and $6.4 million lower Water Infrastructure revenue, partially offset by $5.3 million higher Oilfield Chemicals revenue discussed below. For the Current Period, our Water Services, Water Infrastructure, Oilfield Chemicals and Other segments constituted 61.0%, 16.6%, 19.5% and 2.9% of our total revenue, respectively, compared to 58.8%, 15.0%, 16.5%, and 9.7%, respectively, for the Prior Period. The 2018 adoption of Accounting Standards Update 2014-09, Revenue from Contracts with Customers, did not have a material impact on revenue recognition. The revenue variances by operating segment were as follows:
Water Services. Revenue decreased $66.3 million, or 9.7%, to $619.4 million for the Current Period compared to $685.7 million for the Prior Period. The decrease was primarily due to lower water transfer and containment revenue primarily attributable to reduced drilling and completions activity and pricing pressure, partially offset by increases in revenues from flowback and well testing, water treatment, equipment rentals and water network automation and technology services.
Water Infrastructure. Revenue decreased by $6.4 million, or 3.6%, to $169.3 million for the Current Period compared to $175.7 million for the Prior Period, primarily due to reduced activity on our Bakken pipeline system during the first half of 2019.
Oilfield Chemicals. Revenue increased $5.3 million, or 2.8%, to $197.8 million for the Current Period compared to $192.4 million for the Prior Period, primarily due to increased sales of our friction reducer products supported by the increased manufacturing capacity from our Midland, Texas plant.
Other. Other revenue decreased $83.8 million, or 74.2%, to $29.1 million for the Current Period compared to $112.8 million in the Prior Period as our Affirm subsidiary, sand hauling operations and Canadian operations were divested and wound down.
Costs of Revenue
Costs of revenue decreased $114.0 million, or 11.4%, to $888.6 million for the Current Period compared to $1.0 billion for the Prior Period. The decrease was primarily due to $67.8 million lower costs from the combination of our Affirm subsidiary, sand hauling operations and Canadian operations, all of which were divested and wound down during the Current Period. Also impacting the decrease was $46.8 million lower Water Services costs, primarily due to aligning our cost structure to lower revenue, further discussed below.
Water Services. Cost of revenue decreased $46.8 million, or 9.0%, to $472.0 million for the Current Period compared to $518.8 million for the Prior Period primarily driven by reduced drilling and completions activity levels. Cost of revenue as a percent of revenue was relatively flat, moving from 75.7% to 76.2%.
Water Infrastructure. Cost of revenue increased $6.3 million, or 5.3%, to $126.6 million for the Current Period compared to $120.3 million for the Prior Period. Cost of revenue as a percent of revenue increased from 68.5% to 74.8% primarily due to a decline in contribution from our high-margin Bakken pipeline system.
Oilfield Chemicals. Costs of revenue decreased $1.1 million, or 0.7%, to $170.9 million for the Current Period compared to $172.1 million for the Prior Period. Cost of revenue as a percent of revenue decreased from 89.4% to 86.4% due primarily to freight cost-savings from our Midland, Texas plant as well as improved inventory management and increased sales of higher-margin friction reducer products.
Other. Other costs decreased $67.8 million, or 69.1%, to $30.4 million for the Current Period compared to $98.2 million in the Prior Period, primarily due to the divestitures discussed above.