# Pool shock / chlorine tabs — Postal shipping restrictions by item category

For Pool shock / chlorine tabs, carrier is USPS; restriction type is restricted; scope is domestic US; conditions is Classified as oxidizer. Requires hazmat declaration. $50 noncompliance fee if undeclared, effective July 12, 2026, recorded from its source on 2026-08-04.

- **Item category:** Pool shock / chlorine tabs
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** domestic US _(our reading, not quoted from the source)_
- **Conditions:** Classified as oxidizer. Requires hazmat declaration. $50 noncompliance fee if undeclared, effective July 12, 2026. _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Pool shock / chlorine tabs | Oxidizer | UN1748

## Source

- https://selleressentials.com/usps-hazmat-noncompliance-fee-2026/

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).