TY - RPRT TI - Thirty years of regional groundwater-quality trend studies in the United States: Major findings and lessons learned AU - Bruce D. Lindsey AU - Brandon J. Fleming AU - Phillip J. Goodling AU - Amanda Nicole May PY - 2023 DO - 10.1016/j.jhydrol.2023.130427 UR - https://pubs.usgs.gov/publication/70249944 ID - 70249944 ER -