We　propose　single-species　population　models　with　the　psychological　effects　and　time　delay　in　a　toxicant　environment　in　this　study,　of　which　the　concentrations　of　toxicant　nonlinearly　affect　the　density　of　adults,　linearly　affect　the　density　of　juveniles.　The　models,　consisting　of　a　system　of　stochastic　differential　equations,　govern　the　dynamics　of　juveniles　and　adults,　as　well　as　the　concentrations　of　toxicant　in　the　environment　and　organisms.　First　of　all,　the　existence　and　uniqueness　of　the　global　solution　to　the　models　are　derived,　the　sufficient　conditions　of　the　extinction　and　the　time　that　the　densities　of　adults　and　juveniles　approach　zero　are　investigated.　Further,　the　sufficient　conditions　for　the　weak　persistence　in　the　mean　are　obtained　around　the　pollution-free　equilibrium　point,　and　the　stochastic　permanence　of　adults　and　juveniles　occurs　around　the　pollution　equilibrium　points　under　moderate　conditions.　As　a　consequence,　the　corresponding　numerical　simulations　reveal　that　higher　psychological　effects　and　less　time　delay　create　larger　densities　of　juveniles　and　adults　in　the　sense　of　weak　persistence　and　stochastic　permanence,　and　that　less　fluctuations　of　white　noises　and　less　psychological　effects　produce　the　earlier　extinction　time　for　adults　and　juveniles.