Chemical costs are given as $2.23/metric ton. On this basis, the cost of treating water in the production of 180,146 metric tons of newsprint is $415,106. The amount of water that is discharged into Williston Lake is 83.5% of the total drawn from groundwater. Applying this proportion to the treatment costs of water suggests a material purchase value of non-product output of $346,614. Further research on material purchase values is required to verify this and other costs.