Water testing from Ward Labs, request test W-6.
Click on “About Us”, then “General Information” and then “Sampling Supplies.” From there you can order FREE water testing bottles, shipping boxes and pre-paid USPS shipping labels.
If you do that, you get to a page that looks like an order form. You fill in how many of each thing you want — I asked for a water testing bottle and a pre-paid shipping label — provide your contact information, and click submit. I guess I did not expect it to actually be free, so I was pleasantly surprised when the next screen was an order confirmation and not a credit card screen. I guess they figure you are going to use them to buy a water test, after all, and will pay for it then. Still, it is a nice gesture. A little bit later I got an email confirmation, as well.
I will post and update when I get my test bottle.