ENVIRONMENT

Toxic Metal Fallout from Battery Plant Fire Contaminates California Wetland

PUBLISHED Aug 28, 2026, 9:58 AM ET

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More than 18 months after a January 2025 fire at the Moss Landing battery storage facility released an estimated 55,000 pounds of heavy metals into nearby wetlands, researchers and regulators remain divided over the disaster's lasting impact. A peer-reviewed study by San Jose State University found metal concentrations in Elkhorn Slough soil increased 100 to 1,000 times above baseline levels. However, a report commissioned by facility owner Vistra Corp., released in August 2026, concluded that soil, sediment and surface water samples taken months later posed no unacceptable risk to human health or the environment. The timing of sampling explains the discrepancy, with San Jose State collecting data immediately after the fire and Vistra's consultant testing four to nine months later. State regulators have cautioned that the report's conclusions are limited. Meanwhile, a class-action lawsuit against Vistra and PG&E continues, and the fire's cause remains undetermined. The EPA is overseeing the largest lithium-ion battery cleanup in its history, with Phase 2 demolition expected to continue into 2027.

By Emily Rhodes | JQJO News

Timeline of Events

September 2021: Vistra's fire suppression system failed in an earlier incident.
· 2022: A second fire suppression failure occurred at the facility.
· January 16, 2025: Fire erupted at 3 p.m. at Moss Landing 300 building.
· January 16-19, 2025: Fire burned for three days, prompting 1,200 evacuations.
· January 17-20, 2025: EPA conducted air monitoring near the facility.
· February 2025: Class-action lawsuits filed against Vistra and PG&E.
· February 18, 2025: A reignition event occurred at the fire site.
· September 2025: Phase 1 cleanup began at the Moss Landing site.
· November 2025: Nature published peer-reviewed study confirming heavy metal deposition.
· August 2026: Monterey County released Vistra-commissioned report finding no unacceptable risk.
Present Events:
· August 20, 2026: San Jose State researchers called for broader review of findings.
· August 28, 2026: Conflicting studies leave full environmental impact unresolved.
Future Expectations:
· Cleanup Phase 2 demolition expected to begin in fall 2026.
· EPA expects cleanup to last until at least early 2027.
· Fire's cause investigation remains ongoing with no timeline.

News Intelligence

Immediate US impact: Local community faces health fears and economic disruption from contamination.
Possible long-term US impact: Regulatory overhaul of battery storage safety and cleanup protocols nationwide.
Most affected groups: Moss Landing residents, Elkhorn Slough wildlife, Monterey Bay tourism businesses.
What readers should prioritise: Monitor agency reports, lawsuit developments, and independent scientific studies for updates.