Estimated Densities of Residential Septic Tanks across the Conterminous United States for 12-digit Hydrologic Unit Code 12 (HUC12), National Hydrography Dataset Plus Version 2 (NHDPlusV2) Catchment, and Block Group Scales

This dataset provides estimates of residential septic tank densities at 12-digit Hydrologic Unit Code (HUC12), National Hydrography Dataset (NHD Plus version 2.1,...本数据集提供了以12位水文单元编码（Hydrologic Unit Code, HUC12）与国家水文数据集（National Hydrography Dataset, NHD Plus 2.1版）为统计单元的住宅化粪池密度估算值……