The phrase "stagnant pond" means a small body of water, like a pond, that doesn't move or flow, which can make it dirty and not good for the plants and animals living in it. Full definition
Bring along plenty of water, and avoid stagnant ponds that may harbor harmful parasites. (sunsetvetclinic.com)
From eight - year - old Louis Mackenzie in Kenpech, who relies on a dwindling bottled water supply, to 17 - year - old Kiesha Michele, who slept on the streets after her home was destroyed and now lives on an island with only stagnant ponds and unprotected springs - these stories are the basis of the UNSHAKEN campaign. (treehugger.com)
Surface water is readily available in most of Sierra Leone, particularly in rainy season, so many people here were collecting water directly from nearby streams or stagnant ponds. (rachelheldevans.com)