[amluto]

One would imagine that salt spray from the ocean (which can easily register as PM2.5) is mostly sodium chloride, is rather water-soluble, and is entirely harmless in your bloodstream in any quantity that you could plausibly inhale.

[notmyjob]

As I understand it you are incorrect. Salt from sea breeze is pm10 not pm2.5. My information may be inaccurate but google backs it up.