> For the complete documentation index, see [llms.txt](https://docs.tonic.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tonic.ai/app/admin/configuring-a-self-hosted-instance/configuring-worker-zones.md).
# Configuring worker zones
{% hint style="info" %}
**Required global permission:** Manage environment settings
{% endhint %}
On a self-hosted instance, you can configure a list of zones to assign Structural workers to. Each zone can contain one or more workers.
When zones are available, each workspace can be assigned a zone. When a workspace is assigned to a zone, then the workspace jobs are always routed to a worker in that zone. Workspaces that are not assigned to a zone are routed to a worker that is not in a zone.
Worker zones allow you to manage the job traffic on your instance.
## Displaying the list of zones
The list of zones is on the **Zones** tab of **Structural Settings**.
Zones tab on Structural Settings with the list of worker zones
For each zone, the list includes:
* The zone identifier. You use the identifier to [assign workers to the zone](#assigning-workers-to-zones).
* The zone name.
* The zone description.
* The number of workspaces that use the zone.
* When the zone was added.
## Adding a zone
To add a worker zone:
1. Click **Create Zone**.
Create Zone panel to create a new worker zone
2. On the zone details panel:
1. In the **Zone Name** field, provide a name for the zone.
2. In the **Description** field, provide a longer description of the zone.
3. Click **Save**.
Structural generates an identifier for the zone and adds the zone to the list.
### Editing a zone
For an existing zone, you can edit the name and description. The identifier does not change.
To edit a zone:
1. In the zone list, click the edit icon for the zone.
2. On the zone details panel, make the edits to zone configuration.
3. Click **Save**.
## Assigning workers to zones
On each worker, to assign the worker to a zone, set the [environment setting](/app/admin/environment-variables-setting.md) `TONIC_WORKER_ZONE_ID` to the identifier of the zone.
The zone identifier is displayed on the **Zones** list.
## Deleting a zone
To delete a zone:
1. In the zone list, click the delete icon for the zone.
2. On the confirmation panel, click **Yes, delete zone**.
When you delete a zone, any workspaces that used that zone are updated to not use a zone.
---
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