This is what the reservoir that my water comes from looks like. It's really disgusting. They put chlorine into the blue tank to 'clean' the water, but no traces of chlorine actually enter the water in the houses, so the system is not terribly effective. There are plants growing in the water inside, and it turns out that the accumulation of debris and residuals has caused an excess of free radicals to be present in the water, not to mention the over-the-limit level of fecal matter. Delicious.
One of my current projects is working with some hydraulic engineers on a profile of the current system and a proposal for a new reservoir and some sections of new piping to increase the quality and water pressure throughout the network. It's been interesting to survey the topography of the whole town and it's surrounding small communities, and I've been administering a survey to find out the opinions of the people about their water quality. So here's to making a better system and not getting cancer!