You live in coal country. 99% percent of rain events here are acid rain.

Well, this rain came from the South.

Doubtful.

The acid from the Feb. 3 event mostly dissipated from the local atmosphere within a couple days after the burn-off.

No. That air/smoke was blown out of state and out over the ocean nearly a week ago when the powerful front with strong surface winds blew through the state last Thursday night into Friday. Today's rain event is Gulf moisture from the south. There is absolutely nothing to worry about. The only detrimental effect could be runoff from the derailment site itself and percolation into groundwater (they literally buried the "burn pit" to repair the track so they could restore east-west rail service as soon as possible, which is fucked because it wasn't properly cleaned. Because, capitalism.)

Completely anecdotal but in Lycoming county the rain today smells vaguely of burnt plastic. Noticed it immediately when I let the dogs out this AM.

Yeah, I smelled weird plastic as well. I'd stay indoors, but rain hit me already. If you ever do go out, especially don't breathe in the air.

And make sure to wash your body just in case.

This story from the Cincy Enquirer has some info.

Not from coal burned directly here. Some of the factories in eastern ohio/west virginia utilize coal and the jet stream pushes that east and north. The coal burned in pa the same way moves with the jet stream to jersey and new york. The average ph of rain could vary but it always almost slightly acidic around a 6.5-6.75 on the ph scale without the addition of sulfides to the atmosphere.

Not from coal burned directly here. Some of the factories in eastern ohio/west virginia utilize coal and the jet stream pushes that east and north. The coal burned in pa the same way moves with the jet stream to jersey and new york. The average ph of rain could vary but it always almost slightly acidic around a 6.5-6.75 on the ph scale without the addition of sulfides to the atmosphere.

This was a good read. Thank you. And thank you everyone for your replies. I feel a little more at ease but I will still exercise caution.

I have been wondering if any of the precipitation gotten since this derailment contains toxicity from the chemicals. It is now starting to rain where I live and hopefully this rain is not toxic as I am somewhat fearing it is.