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Dashboard Week – Day 5: How did BASIX certified single dwellings use rainwater?

This post was originally published on The Data School blog between 2018 and July 2025, before our program was renamed to MIP’s Analytics Career Accelerator. References throughout this article to “The Data School” or “DS” all refer to what is now MIP’s Analytics Career Accelerator. The program, its people, and its commitment to launching outstanding analytics careers remain the same – just under a new name.

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Finally, the last challenge of Dashboard Week!! Today we have less time to complete the dashboard and blog because we need to present at 3 pm. We were given the BASIX certificate data for single dwellings from 2011-12 to 2018-19.

Data wrangling:

The data is very clean, so I loaded it directly to Tableau to build the dashboard. I did use Alteryx to generate a separate dataset in which I pivoted the type of water usage to a single column to build a bubble chart.

What did I build?

Due to time constraints, I chose to focus on the dwellings’ usage of rainwater. Here is a screenshot of my dashboard.

Some insights:

  • Around August and September 2015, the volume of rainwater tanks for newly certified dwellings dropped to the lowest level.
  • Rainwater was mainly used for gardening and lawns, laundry, and toilet flushing.
  • Household water and hot water mainly relied on the town water supply.
  • Dwellings that do not use rainwater for laundry and toilet flushing also relied mainly on the town water supply.
  • For gardening and lawns, reticulated alternative water was the second-largest source of water after rainwater.

 

Click here to access the dashboard.

 

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