Location of Other Wetlands in Grey County, that are not Provincially Significant Wetlands from the Grey County Official Plan Appendix B. Wetlands are areas of that lands that are seasonally or permanently covered by shallow water, as well as lands where the water table is close to or at the surface. In either case the presence of abundant water has caused the formation of hydric soils and has favoured the dominance of either hydrophytic plants or water tolerant plants.