In　recent　years,　the　malodorous　gases　generated　by　sewage　treatment　plants　have　gradually　received　widespread　attention　due　to　their　sensory　stimulation　and　health　hazards.　The　emission　concentration,　sensory　evaluation　and　health　risk　assessment　of　volatile　sulfur　compounds　(VSCs)　were　all　explored　in　two　municipal　wastewater　treatment　plants　(WWTPs)　with　oxidation　ditch　and　anaerobic/oxic　treatment　process,　respectively.　The　VSCs　concentration　showed　the　highest　amount　in　the　primary　treatment　unit　in　both　the　two　WWTPs　(73.3%　in　Plant　A　and　93.0%　in　Plant　B),　while　the　H2S　took　the　main　role　in　the　composition　of　VSCs.　However,　H2S　took　a　larger　percentage　in　Plant　A　(84.5%　∼　87.0%)　rather　than　Plant　B　(61.2%　∼　83.5%),　which　may　be　due　to　the　different　operating　conditions　and　sludge　properties　in　different　treatment　process.　Besides,　H2S　also　gained　the　first　rank　in　the　sensory　evaluation　and　health　risk　assessment,　which　may　cause　considerable　sensory　irritation　and　health　risk　to　workers　and　surrounding　residents.　Furthermore,　the　influencing　factor　analyses　of　VSCs　emission　showed　that　the　temperature　of　water　and　air,　ORP　of　sludge　made　the　greatest　effect　on　VSCs　release.　This　study　provides　theoretical　and　data　support　for　the　research　of　VSCs　emission　control　in　WWTPs.　©　2024