Do u think its safe to use pond water for watering?

Hello If the pond is fed by a stream it can be used. You would preferably want to filter it and you would probably want to take a water sample to test for contaminants and any problems that might arise. You can contact your local office and they could probably do it for you or point you in the right direction. Otherwise I've seen water tests at local garden/feed center, especially one who sells fish. You also have to consider that many ponds do get algae, so you might get some algae buildup. But how did people grow plants before indoor plumbing and irrigation? If anything test on one plant first before using on all plants.