Steroid　estrogens　have　received　worldwide　attention　and　given　rise　to　great　challenges　of　aquatic　ecosystems　security,　posing　potential　adverse　effects　on　aquatic　organisms　and　human　health　even　at　low　levels　(ng/L).　The　present　study　focused　on　understanding　the　mobility　and　abiotic　transformation　of　estrone　(E1)　and　estrone-3-sulfate　(E1-3S)　over　spatial　and　time　scales　during　soil　transport.　Column　transport　experiments　showed　that　the　migration　capacity　of　E1-3S　was　far　stronger　than　E1　in　soil.　The　calculated　groundwater　ubiquity　score　and　leachability　index　values　also　indicated　the　high　leaching　mobility　of　E1-3S.　The　hydrolysis　of　E1-3S　and　abiotic　transformation　into　estradiol　and　estriol　was　observed　in　the　sterilized　soil.　Furthermore,　possible　transformation　products　(e.g.,　SE239,　E2(378),　E1　dimer(538),　E1-E2　dimer(541))　of　E1　and　E1-3S　in　soil　were　analyzed　and　identified　after　the　column　transport　experiments.　The　estrogenic　activity　was　estimated　by　17　beta-estradiol　equivalency　values　during　the　transport　process　in　aqueous　and　soil　phases.　Additionally,　the　potential　leaching　transport　to　groundwater　of　E1-3S　requires　further　critical　concern.