Electricity usage is also a good one and is easily measurable these days with power companies being so proactive with their reporting processes and Apps that include real-time usage and forecast usage.
I'm interested to hear what sort of trends you are looking for here. e.g. waste oil - are you wanting it to be high (indicating more oil being collected for recycling/reuse) or low (indicating less wastage).
If you're a servicing company, then waste oil will vary depending on how busy the company is. A measure of waste oil vs. fresh oil used may be of better use; or the percentage of oil purchased in plastic containers vs. drums.
As well as measuring items, you need to make sure you're not incentivising bad practice.
Waste oil will be a tricky one. The measure will mostly be around the containers. I have found a few in the bottom of skips rather than waiting for the recycling company.
Hi Michael, You might also consider your supply and distribution chain natural resource impacts and whats being done to make them more efficient and clean. They too, might be part of your sustainability measurements and potential carbon footprint calculations.