This spreadsheet allows the determination of the water ionic balance based on it´s constituents. The ionic balance is required for Reverse Osmosis and Ion Exchange plant designs.

The functionality of this spreadsheet is available on an improved version in the Plutocalc Water application.

This spreadsheet allows the design of slow sand filters. This water treatment technology does not require expensive equipment or chemicals (coagulants, polymers, limestone, etc...) and can be used in small communities and villages.

All calculations and rates are following the Brazilian Standard NBR 12216/92. The spreadsheet is in Portuguese and in English.