# 9.4.4 Corrective action

Where monitoring results indicate a deviation from target criteria or critical limits, appropriate corrective actions and process adjustments should be instituted to maintain water quality. Examples of corrective actions are:

* repairing fences;
* removing dead animals from catchment areas;
* increasing catchment controls;
* inspecting the water supply system for faults;
* altering the flow rate of the water treatment plant to reduce loading;
* manual backwashing of filters;
* adjusting process control;
* inspecting and calibrating monitoring equipment;
* engaging back-up equipment;
* adjusting pH;
* selecting an alternative raw water source, if available;
* increasing disinfection dose;
* booster disinfection;
* flushing of mains; or
* increasing monitoring and observation.

Additional monitoring will be required throughout the system to verify the effectiveness of any corrective actions.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-3/chapter-9/9.4-operational-monitoring/9.4.4-corrective-action.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.