This document discusses the development of an interactive web map to assess anthropogenic wastewater generation in the Tierra Blanca watershed using GIS data. The map aggregates spatial data on wastewater sources like feed yards and municipalities. Assessment techniques were used to improve Cropland Data Layer accuracy including pixel counting, Bayesian probability, and linear regression. Future plans include layers on additional wastewater sources and quality, water availability/quality in aquifers, and playas. The map will help decision-makers understand water resources and conservation options in the watershed.