Open sources of water are rarely safe. When open to nature they can be contaminated with household and industrial waste, animal faeces, parasites, and waterborne diseases like cholera. They are also unreliable, prone to drying up or running out. This means people often need to find a new source, which could be many miles away. A community cannot move every time this happens. Land ownership is also an issue for most people; communities living in poverty often don't have the money to simply move to new locations. A safer, longer-term solution is to create a water facility that is local, using water that needs only minimal filtering – such as groundwater or rainwater – and owned collectively by a community.