This data set includes water level response data from two salt marshes in Buzzards Bay, Massachusetts, which received hydrologic restoration to address interior ponding using runnels. These data are from a replicated BACI (before-after-control-impact) designed study, at two marshes with differing hydrology and geomorphology. Data were collected using HOBO Water Level Data Loggers (U20L-04) deployed below the marsh surface between May and October (full duration of deployment varies by year). Data were collected every 15-minutes and filtered to generate a minimum daily water level. Water levels are presented relative to soil height.