Safe water for orchids.

[Orchid Whisperer]

DOH!! Just realized how old this thread is. Leaving the info below in case it might be useful.

Before going to a lot of expense with treatment systems, I suggest the following.

Find out if your city also gets their city water from wells. If they do, its likely (but not certain) you are getting water from the same aquifer and your well water quality should be similar to their water. The city should be able to provide a water report, it may even be on a city (public works, etc.) website. If total dissolved solids (TDS) is lower than 200 ppm (lower is better) the water should be OK for orchids.

If you REALLY want to be sure, you can submit a sample of water from your well for analysis to your county agent (or cooperative extension service. I would ask them to test TDS and pH; they may have a basic water test package that includes more parameters for relatively low cost.