ESG waste reporting basics for NZ businesses
More New Zealand organisations are being asked to show what happens to their waste — for ESG reports, tenders, tenants and boards. Here's the plain-English version: what waste data matters, where it comes from, and how to use it without over-claiming.
What "waste" means in an ESG report
In most ESG and sustainability frameworks, waste sits under the environmental pillar. At a practical level, you're usually asked to show how much waste your site generates, how much is diverted from landfill, and what you're doing to reduce it. You can't report any of that credibly without measured data.
The metrics that matter
- Weights by stream — how much general waste, recycling, cardboard and e-waste you produce
- Diversion-from-landfill rate — the share kept out of landfill, the headline number most reports want
- Contamination — how clean your recycling is, which affects how much is genuinely recovered
- An indicative CO₂e estimate — diverting material avoids some emissions; treat this as an estimate using stated factors, not a verified carbon inventory
Where the data comes from
It comes from your collections. Weights are recorded by stream using bin, route or facility weight data, then reported monthly. That gives you a monthly diversion report per site — the raw material for an ESG section — instead of guesses. See how WasteLogic reporting works.
How to use it honestly
Report what you measured: weights, diversion rate and trend over time. Where a figure is an estimate (like CO₂e), say so. If you're submitting to a programme such as Green Star, Homestar or a tender, your data supports the submission but is still subject to that programme's own requirements and your assessor's advice. Honest, measured numbers are far stronger than round claims you can't back up.
Related: the NZ waste levy explained and how to cut your waste costs.
ESG waste reporting — common questions
At a minimum, weights by stream and your diversion-from-landfill rate, ideally tracked monthly so you can show a trend. Contamination levels and an indicative CO₂e estimate add useful context.
Diverting material from landfill avoids some emissions, and diverted tonnes can be translated into an indicative CO₂e estimate using stated factors. That's useful supporting context, but it isn't a verified carbon inventory — label it as an estimate.
Your monthly diversion report is formatted to support ESG, tender and committee reporting — weights by stream and diversion rate you can quote directly. Any programme-specific submission is still subject to that programme's requirements.
Want measured data for your next ESG report?
Tell us about your site and we'll come back with a tailored quote — usually within one business day.