How a Midwest Manufacturer Cut Waste-Related Emissions by 34%

A 1,200-person manufacturing facility in the Midwest had been filing annual sustainability reports for three years — but their waste numbers were estimates, not measurements. When a new CFO asked for auditable figures ahead of a Series C raise, they had none.

Residua conducted a full Residue Intelligence engagement: six weeks of on-site data collection across three shifts, mapping 14 distinct waste streams from point of generation to final disposal. The audit revealed that 31% of materials designated as "recycling" were contaminated and being landfilled — invisible in the company's own reporting.

The gap translated to 847 metric tons of CO₂-equivalent per year in avoidable emissions.

Within twelve weeks of the audit — with targeted station redesigns and a simplified sorting protocol — the contamination rate dropped from 31% to 8%. Recycling rate improved from 41% to 73%. The emissions reduction was third-party verified and included in the Series C data room.

The CFO's comment at close: "We knew we had a problem. We didn't know it was this fixable."