Four pigs and 250', I don't think you'll have many issues other than phytoplankton and algae. If it was a "hose" that ruptured, chances are the flow rate was low, probably 5-25 gallons per minute. Max, that is 9,000 gallons if it leaked for 6 hours.
Considering it had to travel 250', I am sure the majority fecal matter never made it to the pond, just whatever solubilized into the water.
Fortunately, chlorine is a volatile solute, meaning as it meandered the 250' to your pond, some was lost before it entered your pond. Chloramine is a different story but the release doesn't seem significant.
On a side note, I REALLY admire your ponds natural environment.
Thanks for the reply and complement. Your input makes me feel better.
I need to have the water tested, or something. I have lost a lot of fish, or so it seams. Not that I have seen any dead fish, I have not. Bowfin showed up in my pond a few years ago, that could be part of the cause. Not sure what is going on, or how to know for sure.
