---
type: restriction
id: usps-hazardous-materials-hazmat
asset: shipping-restrictions-by-class
title: "Hazardous Materials (HAZMAT) — Postal shipping restrictions by item category"
sources:
  - https://www.usps.com/ship/shipping-restrictions.htm
source_quote: "Some HAZMAT can only be sent by ground transportation—it can’t go on airplanes."
generated: true
harvested: 2026-08-03
stale_after: 2027-08-03
item_category: "Hazardous Materials (HAZMAT)"
carrier: "USPS"
restriction_type: "restricted"
scope: "domestic"
conditions: "Some HAZMAT can only be sent by ground transportation—it can’t go on airplanes."
verified: false
unverified_fields: carrier, item_category
---
**Item category:** Hazardous Materials (HAZMAT)

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic

**Conditions:** Some HAZMAT can only be sent by ground transportation—it can’t go on airplanes.

> Some HAZMAT can only be sent by ground transportation—it can’t go on airplanes.

Source: <https://www.usps.com/ship/shipping-restrictions.htm>