files.dep.state.pa.us - /water/Drinking Water and Facility Regulation/WaterQualityPortalFiles/Methodology/

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 5/27/2020  2:46 PM        <dir> 2015 Methodology
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 12/3/2021  3:22 PM        <dir> 2021 Methodology
  7/2/2025  7:05 AM        <dir> 2023 Methodology