Satellite Data Reveals Dairy Digesters Cut Methane by 80%, but Extreme Leak Events Threaten California’s Climate Goals

UC Riverside researchers find that while dairy digesters can cut methane by 80%, rare leaks are large enough to cancel out their climate benefits.

By: AXL Media

Published: Mar 31, 2026, 6:14 AM EDT

Source: Information for this report was sourced from University of California - Riverside.

The Double-Edged Sword of Methane Capture

Dairy digesters have become a cornerstone of California’s strategy to combat climate change. By sealing manure lagoons and capturing the biogas produced by decomposition, these systems prevent methane—a greenhouse gas 80 times more potent than carbon dioxide—from entering the atmosphere. Lead author Alyssa Valdez and her team at UCR sought to verify if these systems maintain their integrity over time. While the study, published in Environmental Research Letters, validates that digesters generally work well, it highlights a high-stakes trade-off: concentrating methane makes it easier to harvest as fuel, but it also creates the potential for "super-emitter" events if a leak occurs.

Visualizing the Impact: From Lagoons to Plumes

The research utilized a sophisticated combination of satellite imagery and airborne sensors to track 98 dairies. This allowed the team to compare methane output before and after digester installation.

Standard Emissions: An open, traditional manure lagoon typically emits between 20 and 100 kg of methane per hour.

The Success Story: In 80% of cases, the installation of a digester led to a significant disappearance of methane plumes.