Scripps water is run through 3 sand filters. I've been using it for years, Never had a problem. Just don't collect it after it rains or a red tide.
If it's good enough for The Birch Aquarium. It's good enough for me.
Plus it's free!:D
The bulkheads and nozzles you should be able to find at your LFS or online. You can get all the PVC at Home Depot.
By the time your finished you will be VERY familiar with the PVC aisle at Home Depot...:D
Also, Before you get to far ahead with the plumbing. Decide which size(gph)pump you will...