TY - RPRT TI - Temporal and spatial variability of water quality in the San Antonio segment of the Edwards aquifer recharge zone, Texas, with an emphasis on periods of groundwater recharge, September 2017–July 2019 AU - Stephen P. Opsahl AU - MaryLynn Musgrove AU - Keith E. Mecum PY - 2020 DO - 10.3133/sir20205033 UR - https://pubs.usgs.gov/publication/sir20205033 ID - sir20205033 ER -