Most states do not have any laws prohibiting this, but federal law does prohibit dropping any objects that might injure people or harm property. Cremains themselves are not considered hazardous material, but for obvious safety reasons you should remove the ashes from their container before scattering them by air.

Is Spreading ashes against the law?

When it comes to the question of whether or not it is illegal to scatter ashes, there are very few official laws in place. While you should always request permission before scattering ashes on private property, there are no laws about where or how ashes should be scattered on public property.

Why can't you spread ashes in the ocean?

It is legal to spread ashes at sea, but anything put in the water must decompose easily. ... Anything placed in the water must easily decompose in a marine environment. You can release flowers or wreaths into the water, but they must decompose easily.