Yogurt not turning out since relocation
Harsh tap water could definitely cause problems. It doesn't take much chlorine to kill bacteria- that's why we use it, of course. An easy experiment is would be to rinse your jars in filtered water after washing them in your chlorinated water.

Another likely culprit is the new source of your starter. From what I was able to find, Fage yogurt is imported from Greece. There is going to be a lot of variability in its freshness shipping to different states and stores in the US. The cultures in Yogurt, even refrigerated, will eventually consume the available lactose and die.

You should try using some other brand as a starter- preferably something produced closer to you so you can have more confidence that it is still viable.

You should also double check your thermometer. If your thermometer was made somehow inaccurate after the move- if your milk doesn't cool below 130F your starter will die. If your milk cools to below 100F or so you starter will be too slow.

Additional Notes  

The change in pan is certainly not the problem. Stainless steel will work just fine for yogurt making.

The climate shouldn't make that big of a difference. The relative humidity won't matter as the whole thing is liquid. The local bacteria shouldn't play a major role if your equipment is clean (and you'd notice spoiled milk if competition was a problem.) Altitude wouldn't even matter very much as it would affect boiling temps but not incubation rates AFAIK.

In your process, you mention that you bring your milk to 180 and then immediately cool it. This won't affect your incubation and so I don't think it's your problem but the description, as written, is inadequate. It takes time at a certain temperature for the change in the proteins to happen. See my other answer. The short story is, at only 180F you have to hold the milk at that temperature for 30 minutes to see the intended benefit.

** EDIT **
You added the comment above that the milk didn't change and was like you had just warmed it.
This means that your bacteria were entirely inactive.
Chlorine residue on the bottles might inhibit some bacteria growth but I wouldn't expect it to be able to completely stop it. Likewise, if your thermometer was off and your mix was too cool the bacteria would still do something, just slower.  

Your bacteria was dead. It's possible the milk was too hot when you mixed in the starter and killed it but in my experience it's more likely that you had a bad starter.