radiata
NJRC Member
This was my thought too. Get a small (simple) boat with trailer and a bunch of containers. Go out to deep water, fill in, come back. Think of other benefits! -fishing, etc.
I've known people who've collected their salt water on the Jersey Shore. Plastic 55G drums were used for transport. Note that any vehicles you use will eventually suffer rust damage. To collect water ideally, you should go out 3 to 5 miles in your boat. Then you should filter the water with carbon to remove any petrochemicals. And then, you should store it for a few months to kill off any parasites. Whacking it with bleach would, no doubt, speed up this last process.