---
title: "Pollutants"
canonical: "https://help.innovyze.com/space/infodrainage2021v1/16548117/Pollutants"
format: markdown
---
**Pollutants **can be** added**, **deleted**, **renamed** or **merged** together.  Pollutant names must be unique and are case sensitive, if duplicate names are entered these are modified to be unique.

---

If ** **[**Stormwater Controls - SWC**](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2021v1/pages/16548446) or ** **[**Inflows**](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2021v1/pages/16548374) are created or loaded from another source, any pollutants that are not available are added automatically. 

Note: pollutant names are case sensitive so some duplication may occur, use the Merge functionality to eliminate duplicates.

The number of pollutants is limited to fifteen.

![image](media://23175a16-7ee5-40f8-8117-4310198e0c67)

**Toolbar**

**Add** - Adds a new Pollutant to the end of the list.

**Delete** - Deletes currently selected Pollutant.

**Merge** - Only the lead pollutant remains and all other selected pollutants are deleted.  

> ℹ️ **Note**
> ℹ️ 
> ℹ️ When merging the pollutant concentration (Inflow) or removal values (Stormwater Control) from the first pollutant will be kept. However if value is 0 the next set of values will be used.