Plot with the stagnant water body towards the west side is not a good place to make a construction. This will hamper your progress. You can make a correction in your plot by using a virtual copper vastu partition with the proper vastu guidance from expert.
Lake towards West of your plot according to vastu is good. This type of lake/tank/pond brings happiness, wealth and health. It gives more benefits when should be fix a water tap. The Bore well Hand pump in North East and North North of your house.
if your plot have compound wall then you need not worry.
I have a small lake(like a very long pond) towards south side on my plot (Sout-east to be exact). The pond is quite long going across from east to west in length. The lot is ~1 acer and the house to lake distance is approx 120ft sloping down(backyard). the main entrance is north west facing. Is having pond at a distance in this direction bad vastu?