Associations ASSOCIATIONS & ORGANIZATIONS. American Water Works Association Association of Water Board Directors National Groundwater Association North Harris County Regional Water Authority The Subsidence Districts Texas Commission on Environmental Quality Texas Groundwater Association Texas Water Development Board Texas Water Net – Texas Water Research Institute Texas Water Utilities Assocation (TWUA) Trinity-Neches-Sabine (TNS) District Green Forest Water Utilities Asssocation Sam Houston Water Utility Association USGS Ground Water Information USGS Real-Time Stream Flow data West Harris County Regional Water Authority
