Water Knowledge


Register to access all of AWWA's Resource Communities - IT’S FREE!

Click on the login button at the top-right of this page to register.  If you’re already a member or a registered user, simply log in using the button at the top-right of this page. Once you're logged in you can explore these collaborative communities for sharing resources including information, tools, and learning opportunities.

Take a look at the Resource Community Road Map below to discover all of the content available.

Diagram of page layout for Research Communities

Latest Resource Community News

Water Loss Control

Water coming from a main break

Water utilities are continually improving water delivery operations by keeping system losses
to a minimum.     

Learn more about Water Loss Control


How Water Works
How Water Works poster

How Water Works illustrates the processes, equipment and technology of a water supply and wastewater treatment system.

Explore How Water Works

Conservation communications

Water Conservation Guide Logo

AWWA volunteers have created an easy-to-navigate toolkit to help utilities communicate the value of conservation to consumers, public officials and other key stakeholders.

Read the overview (PDF)

To request a full copy of the CD kit:
Email Amber Wilson

Hypochlorite Assessment Model
Storage tanks

A predictive modeling tool available exclusively to AWWA utility members provides guidance on the expected levels of perchlorate and chlorate in bulk hypochlorite solutions.

Access the model

Lab bottles

Corrosivity Calculations

Estimate the corrosivity of a water sample using the Langelier Saturation Index (LSI) and the Ryznar Stability Index (RSI); the following spreadsheet comes from AWWA WaterMATH version 2.0 (currently unpublished):

WaterMATH Corrosivity Estimators (XLS)

For more precise estimates, try the Tetra Tech (RTW) Model for Water Process & Corrosion Chemistry