Snot like brown slime in water from neighboring farm well
Hello, I recently purchased part of a small farm with a cabin on it. The water comes from my neighbor's (seller) well. It is fed through a buried 1 inch PVC pipe that goes through my neighbor's cow pasture, runs about 750 feet downhill, is exposed for about 12 feet where it crosses over a creek, and then another 50 feet up hill to that the cabin. The only filter is on the refrigerator. I used a "complete" water test from filtersfast.com to test my water and everything was negative and checked OK. The problem I'm having is there is a brown "snot like" slime coming from somewhere that clogs all of my small screens on everything. It clog's my washer hoses, screens on faucets, and will completely stop a lawn sprinkler! I have to clean the sprinklers screen out once a day and he washer band faucets about once every month. I remodeled the bath and replaced all the PVC under the cabin. The PVC I removed was stained dark brown but was very dry not slime. The new toilet tank is stained the same. . The ice maker's control "paddle" in my new refrigerator is stained where a drop might linger and can't be cleaned, etc. The water is crystal clear without sediment, even after standing for a day, and tastes great. Can I trust the tests that it's OK to drink? What could be causing my brown slime? What might you suggest I do?