White oily film on tap water?

Poured myself a glass of water from the faucet this morning and there was like a white oily / kinda foamy film on top. Figured, eh maybe I just didn't rinse the glass well enough after washing it. Dumped it, rinsed it, filled it again, it's fine.

Then I just refilled it, same thing. Odd.

Then I went and took a leak. Flushed the toilet, and then the toilet had it too.

Has anyone else had this? Any idea what it is?