Day: July 23, 2026

Key Takeaways

• The U.S. Chemical Safety Board found that a corroded sprinkler component leaked water onto reactive chlorinated chemicals inside BioLab’s Conyers warehouse, triggering the September 2024 fire and toxic plume.
• BioLab stored nearly 14 million pounds of hazardous pool treatment chemicals — more than double the facility’s planned capacity — without adequate safeguards.
• The CSB called on OSHA and the EPA to expand regulatory coverage of chemicals used in the pool and spa industry, citing a significant gap in existing federal rules.
• BioLab ceased manufacturing operations at the Conyers site in May 2025 and listed the property for sale in January 2026.
• The U.S. Department of Labor previously cited BioLab for six workplace safety violations and proposed more than $60,000 in penalties.

What Did the CSB Investigation Find at the BioLab Conyers Facility?

The Chemical Safety Board’s final report traces the disaster to a single failed sprinkler head inside Plant 12, the warehouse where BioLab stored bulk quantities of trichloroisocyanuric acid (TCCA), sodium dichloroisocyanurate (DCCA), and bromochloro-5,5-dimethylimidazolidine-2,4-dione (BCDMH). When water from the corroded component contacted these reactive chemicals, it set off a chain reaction that generated intense heat and released toxic off-gassing — including chlorine, hydrogen chloride, and bromine — into the surrounding atmosphere.

The plume that rose from the Conyers facility on September 29, 2024, was visible for miles. It forced shelter-in-place orders across Rockdale County, prompted the closure of a section of Interstate 20, and disrupted daily life for communities across metro Atlanta’s eastern suburbs for weeks. Schools canceled classes. Residents sealed windows. Emergency responders worked to contain a situation that, according to investigators, never should have reached that scale.

As Georgia Public Broadcasting reported, CSB Board Member Sylvia Johnson urged OSHA and the EPA to act immediately to expand coverage of hazardous chemicals so that incidents like the BioLab fire do not continue to occur in communities across the country. The agency’s investigation found that BioLab’s warehouse contained approximately 5,000 supersacks of reactive chemicals — each weighing more than a ton — some stacked in configurations that prevented first responders from containing the initial reaction before it escalated into a full-scale fire.

How Long Did BioLab Know About the Corroded Sprinkler System?

The CSB report reveals that corrosion and leaks in the Plant 12 sprinkler system had been documented since 2019, shortly after the warehouse was constructed. Rather than proactively replacing the deteriorating components, BioLab operated the system on a “run to failure” maintenance approach — allowing corroded parts to remain in service until they physically broke down. The board stated directly that the incident likely would not have occurred if BioLab had taken steps to prevent the sprinkler system leaks instead of allowing the equipment to degrade unchecked.

CSB Chairperson Steve Owens described the conditions inside the warehouse as “completely unacceptable.” The nearly 14 million pounds of reactive chemicals stored on-site represented more than double the volume BioLab had originally planned to keep at the facility. That level of chemical inventory, combined with a known-failing suppression system and the absence of secondary containment measures, created what investigators characterized as a preventable catastrophe.

What Are the Regulatory Implications for Georgia and the Southeast?

The CSB’s final report did not stop at assigning blame to BioLab. The board issued formal recommendations calling on federal agencies to close a regulatory gap that left the specific chemicals involved — chlorinated isocyanurates and related pool treatment compounds — outside the scope of existing process safety management standards. Currently, OSHA’s Process Safety Management standard and the EPA’s Risk Management Program do not cover many of the chemicals that were stored at the Conyers facility, despite their demonstrated capacity to produce toxic gas releases when mishandled.

As FOX 5 Atlanta reported, investigators found that BioLab repeatedly allowed corroding equipment to run until complete failure and stored double its planned chemical inventory — a pattern the CSB framed as a systemic lapse rather than an isolated oversight. The agency’s push for expanded OSHA and EPA authority over pool and spa chemicals signals the beginning of a regulatory conversation that could affect how dozens of similar facilities across Georgia and the broader Southeast operate near residential communities.

The U.S. Department of Labor had already cited BioLab for six workplace safety violations following the fire, including four classified as serious, and proposed more than $60,000 in penalties. BioLab ceased manufacturing at the Conyers site in May 2025 and listed the 27-acre property for sale in January 2026. In a statement, a BioLab spokesperson said the company cooperated fully with investigators and would carefully consider the board’s recommendations as part of what it described as an ongoing commitment to safety and continuous improvement.

What Does This Mean for Rockdale County and Metro Atlanta Residents?

For the communities that lived under the shadow of the toxic plume for weeks in the fall of 2024, the CSB’s final report offers long-awaited answers — and a measure of validation. The investigation confirms what many residents suspected: that the disaster was not an unforeseeable accident but the consequence of years of deferred maintenance, excessive chemical storage, and inadequate oversight at both the corporate and regulatory levels.

Rockdale County, Clayton County, and the eastern suburbs of metro Atlanta bore the direct health and economic impact of the fire. The closure of Interstate 20, the disruption to school schedules, and the weeks of uncertainty about air quality left a mark on communities that are still grappling with questions about long-term health effects. The CSB’s call for expanded federal regulation may eventually produce new rules, but for the residents of Conyers and surrounding areas, the more immediate question is whether those rules will arrive before the next facility with a similar chemical profile and a similar maintenance culture fails in the same way.

BioLab has not responded to multiple requests for comment from Georgia Public Broadcasting regarding the final report. The Conyers property remains listed for sale.

FAQs

What caused the BioLab fire in Conyers, Georgia?

The U.S. Chemical Safety Board’s final report found that a corroded sprinkler head inside BioLab’s Plant 12 warehouse leaked water onto nearly 14 million pounds of reactive pool treatment chemicals, triggering a chemical reaction that produced toxic plumes of chlorine, hydrogen chloride, and bromine gas. The corrosion had been documented since 2019 but was never proactively repaired.

What chemicals were stored at the BioLab Conyers facility?

The warehouse contained trichloroisocyanuric acid (TCCA), sodium dichloroisocyanurate (DCCA), and bromochloro-5,5-dimethylimidazolidine-2,4-dione (BCDMH) — chemicals commonly used in pool and spa water treatment. The facility stored approximately 14 million pounds of these reactive compounds in roughly 5,000 supersacks, each weighing more than a ton.

Is BioLab still operating in Conyers?

BioLab ceased manufacturing operations at the Conyers facility in May 2025 and listed the property for sale in January 2026. The company has not announced plans to rebuild at the site.

What regulatory changes has the CSB recommended after the BioLab fire?

The CSB called on OSHA and the EPA to expand regulatory coverage to include the hazardous chemicals involved in the BioLab fire, which currently fall outside the scope of existing process safety management standards. The agency argued that the regulatory gap contributed to the conditions that made the disaster possible.