When you take a look at the Google Maps satellite view at Independence, you see a large number of strange oval shapes in the ground; many seem to be connected, but it’s still not clear what they are:
In fact, they are RIBs (“rapid infiltration basins”), part of a large water reuse system “Water Conserv II” set up by Orange County, Florida, to improve water reuse and reduce discharge to waterways (see also here); the basic idea is that when there’s a lot of waste water, it’s pumped to these shallow storage ponds, from where it can slowly drain to the underground aquifer. There are also benefits in delivering water to where it’s needed, reducing farmers pumping from the aquifer.
And today, finally, I saw an RIB in use – I had to stop and take a couple pictures:
M&I / GBMINI 
Is that poopie?
No, it’s after cleaning etc. Not cleaned to drink standard, but good enough for irrigation/etc.