| Carl,
Here are the first things I would look for and do:
Look at the topography and determine the origin of run-off flowing into the pond. If its a natural vegetated area, then your OK. If its roof-tops and pavement, you need to be a little concerned about nutrients and hydrocarbons. If its in the middle of a nerve gas recycling facility, there could be other considerations.
If it's not a catchment pond, what is the water source. The pond water level could be the ground water table level. It could be spring-fed. It could go dry at certain times of year.
Take a swim in the pond before the water gets cold. See how deep it is. See if the bottom is a thick layer of rotting vegetation or soil. See how many old tires and refrigerators are down there.
Ask around the community and spend some time sitting quietly by the pond to determine whether there are any large predatory fish, tiny forage fish, crocodiles, bull frogs, herons, etc. Maybe this one should come before the swimming part.
Measure the pH, alkalinity, dissolved oxygen (at dawn) and TDS. The results may indicate some larger problem.
Let us know what the vegetation is like. Is it choke water weed, emergent vegetation, no vegetation?
Send photos.
-steve |