Overview
IU Types let you classify the industrial users in your inventory — significant, categorical, food service, dental, and any category of your own. Once a facility is labeled you can filter the inventory by type, which is what makes an audit request like "list every SIU you regulate" a few seconds of work instead of an afternoon.
Where you'll see them
Place | What appears |
The industrial user inventory table | an IU Type(s) column |
An industrial user's overview page | the types, in the summary box at the top |
The create/edit form for an industrial user | an IU Type field |
💡 You can filter the inventory by type even when the column is hidden. Hiding a column only removes it from view; it stays available to search and filter on.
The standard types
Every program starts with the same seven:
Label | Full name |
SIU | Significant Industrial User |
CIU | Categorical Industrial User |
NDCIU | Non-Discharging Categorical Industrial User |
NSCIU | Non-Significant Categorical Industrial User |
MIU | Minor Industrial User |
FSE | Food Service Establishment |
Dental | Dental Facility |
⚠️ Standard types can't be renamed or deleted. They are shared across every program so the labels mean the same thing everywhere. If you need something different, add a custom type alongside them.
Applying a type to a facility
Open the industrial user and edit it.
In the IU Type field, choose from the list.
Save.
A facility can carry more than one type. A categorical user that is also a food service establishment can hold both, and it will appear when you filter for either.
Adding your own types
Custom types are managed under Configurations → POTW, on the Industrial User Types tab.
Go to the Industrial User Types tab.
Click + New IU Type.
Give it a name and save.
The tab also shows how many facilities each type is applied to, standard and custom alike — a quick way to sanity-check a classification before an audit, or to spot a type nobody is using.
Removing a custom type
Tick the box next to the type or types you want to remove.
Use the delete control at the top right of the table.
💡 The name becomes available again afterwards. If you delete a custom type and later want the same name back, you can create it again — a removed type does not keep its name reserved.
FAQ
Why can't I delete an IU type?
It's one of the seven standard types, and those are fixed. Standard types cannot be deleted — add a custom type instead.
Why can't I rename an IU type?
The seven standard types are fixed, so they cannot be renamed. Create a custom type with the name you want.
Why isn't a facility showing up when I filter by IU type?
Either no type is applied to it, or a different one is. Open the facility and check its IU Type field.
Why don't I see the IU Type(s) column in the table?
It's hidden. Filtering by type still works even when the column isn't shown — to display it, use the table's column controls and turn on IU Type(s).
Why does the count on the types tab look wrong?
It counts the facilities a type is applied to, not permits or outfalls. Compare it against a filtered inventory list.
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