Doesn't seem as high as I've heard others having on here. I actually think my tap is 275 or so. Personally I like using distilled water so I know exactly what is in there. However, I just recently read a post on here that gave you a step by step of how to build a filter that will remove about 97% of the disolved soilds out of your water. I tried it and it works.

You build it from the parts inside of one of those "Mr. Clean" car wash kits. It looks funnier than shit but when I tested my PPM of the tap it went from 275 to 9. So it works. I haven't tried it in actual test with my plant yet. I was still gun shy about using the tap water even though it was now only registering 9. But on my next grow I think I'm going to give it a whirl.

But from what I've read, you can use the 200ppm tap. You just need to take that into account when adding in your nutes. But you would be better off using R/O or distilled.