Nanofiltration　has　been　widely　recognized　as　a　promising　technology　for　the　removal　of　micro-molecular　organic　components　from　natural　water.　Natural　organic　matter　(NOM),　a　very　important　precursor　of　disinfection　by-products,　is　currently　considered　as　the　major　cause　of　membrane　fouling.　It　is　necessary　to　develop　a　membrane　with　both　high　NOM　rejection　and　anti-NOM　fouling　properties.　In　this　study,　both　superhydrophilic　and　superhydrophobic　nanofiltration　membranes　for　NOM　removal　have　been　fabricated.　The　fouling　behavior　of　NOM　on　superwetting　nanofiltration　membranes　has　been　extensively　investigated　by　using　humic　acid　(HA)　as　the　model　foulant.　The　extended　Derjaguin-Landau-Verwey-Overbeek　approach　and　nanoindentor　scratch　tests　suggested　that　the　super　hydrophilic　membrane　had　the　strongest　repulsion　force　to　HA　due　to　the　highest　positive　total　interaction　energy　(Delta　G(TOT))　value　and　the　lowest　critical　load.　Excitation　emission　matrix　analyses　of　natural　water　also　indicated　that　the　superhydrophilic　membrane　showed　resistance　to　fouling　by　hydrophobic　substances　and　therefore　high　removal　thereof.　Conversely,　the　superhydrophobic　membrane　showed　resistance　to　fouling　by　hydrophilic　substances　and　therefore　high　removal　capacity.　Long-term　operation　suggested　that　the　superhydrophilic　membrane　had　high　stability　due　to　its　anti-NOM　fouling　capacity.　Based　on　the　different　anti-fouling　properties　of　the　studied　superwetting　membranes,　a　combination　of　superhydrophilic　and　superhydrophobic　membranes　was　examined　to　further　improve　the　removal　of　both　hydrophobic　and　hydrophilic　pollutants.　With　a　combination　of　superhydrophilic　and　superhydrophobic　membranes,　the　NOM　rejection　(R-UV254)　and　DOC　removal　rates　(R-DOC)　could　be　increased　to　83.6%　and　733%,　respectively.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.