Boyle Heights Fire Air Quality Update: What South Coast AQMD Testing Found

New air-quality data is providing more information about the conditions Boyle Heights residents experienced during and after the June 17, 2026 warehouse fire. South Coast Air Quality Management District (South Coast AQMD) documented significantly elevated levels of fine particle pollution in the fire’s smoke plume and later recorded “Very Unhealthy” air quality in Boyle Heights. The agency also continued monitoring the neighborhood as smoke, ash, odors, and cleanup concerns persisted after the fire. 

The June 17, 2026 fire at the Lineage Logistics cold-storage warehouse sent heavy smoke into Boyle Heights and surrounding communities. South Coast Air Quality Management District (South Coast AQMD), which refers to the incident as the “2026 Palos Fire,” began mobile air monitoring the day the fire started and continued monitoring during the fire, its aftermath, and the cleanup. (AQMD) 

The results are important for residents who experienced smoke, ash, odors, respiratory symptoms, or other effects from the Boyle Heights warehouse fire. 

What Did Air-Quality Testing Find During the Boyle Heights Fire? 

South Coast AQMD conducted mobile monitoring on June 17 and June 18 while the fire was actively burning. 

On June 17, the agency reported significantly elevated concentrations of PM2.5 within the smoke plume downwind of the warehouse. PM2.5 refers to very small airborne particles that can be inhaled into the respiratory system. 

AQMD also detected increased levels of bromine and chlorine during its monitoring. The agency reported that those concentrations were below short-term health-based exposure thresholds. Air-toxic metal levels measured during the June 17 monitoring were within typical ranges. (AQMD) 

The distinction is important. The monitoring documented elevated particulate pollution, but not every substance detected exceeded a health-based threshold. 

“Very Unhealthy” Air Quality Was Recorded in Boyle Heights 

The monitoring did not end after the first days of the fire. 

On June 19, South Coast AQMD installed continuous PM2.5 monitors at Eastman Avenue Elementary School and Robert Louis Stevenson Middle School. According to AQMD, those locations were selected based in part on mobile monitoring results identifying impacted areas, proximity to residents and schools, meteorological conditions, and other factors. (AQMD) 

AQMD also issued a particle-pollution advisory beginning June 17 and continued it through June 24 while firefighting and smoldering conditions persisted. (AQMD) 

During that period, AQMD reported “Very Unhealthy” Air Quality Index conditions near the fire in Boyle Heights. 

That is a significant part of the public record surrounding this incident. The effects of the warehouse fire were not limited to what residents could see or smell. Government monitoring documented periods of substantial particulate pollution in the surrounding community. 

AQI Measurements Did Not Capture All Ash and Debris 

There is another important limitation residents should understand. 

South Coast AQMD's advisories explained that Air Quality Index readings for PM2.5 do not account for larger ash particles and debris. 

That means an AQI reading should not necessarily be viewed as a complete measurement of everything that may have been present in the air or deposited around homes and properties during the fire. 

Residents who saw ash on their cars, roofs, patios, yards, windows, or inside their homes may therefore have experienced conditions that are not fully reflected by PM2.5 measurements alone. 

Federal and Local Agencies Also Conducted Monitoring 

South Coast AQMD was not the only agency monitoring conditions. 

According to AQMD, the U.S. Environmental Protection Agency performed air-toxics monitoring and sampling around the perimeter of the affected warehouse during the fire. The Los Angeles Fire Department also monitored for ammonia and other gases at the facility. (AQMD) 

South Coast AQMD later expanded monitoring in the community. Additional continuous monitoring at Eastman Avenue Elementary School included hydrogen sulfide and methane beginning in July, followed by ammonia monitoring. (AQMD) 

Monitoring Continued After the Flames Were Gone 

For many Boyle Heights residents, the fire itself was only the beginning. 

The warehouse contained a massive quantity of frozen food, and the subsequent cleanup generated persistent odor and community concerns. As we previously discussed in our update on the aftermath of the Boyle Heights fire, residents continued reporting problems well after active firefighting ended. (McGonigle Law) 

South Coast AQMD continued conducting mobile monitoring during the cleanup and provided technical oversight of community air monitoring performed by a third-party contractor. The agency has also continued responding to odor complaints and inspecting the facility. (AQMD) 

AQMD has taken enforcement action as well. According to its August–September update, 26 Notices of Violation had been issued to the warehouse operator as of August 7 for alleged violations involving emissions creating a public nuisance. An Order for Abatement approved in August imposed more than 90 conditions intended to contain, reduce, and eliminate odorous emissions. (AQMD) 

These enforcement actions concern regulatory requirements and should not be confused with a determination of civil liability for any individual resident's damages. 

What Should Boyle Heights Residents Do Now? 

If you lived near the warehouse fire and experienced smoke, ash, odors, health symptoms, property contamination, lost income, relocation expenses, or other losses, documentation may be important. 

Keep photographs and videos showing ash or residue around your property. Save receipts for cleaning, air purifiers, filters, temporary accommodations, medical expenses, transportation, or other fire-related costs. Keep medical records if you sought treatment for breathing problems, headaches, nausea, eye or throat irritation, or other symptoms. 

If the fire affected your ability to work, keep records showing missed work or lost income. Property owners should also preserve inspection reports, cleaning estimates, photographs, insurance communications, and other records showing how the property was affected. 

Every person's circumstances are different, and experiencing smoke or living near the fire does not by itself establish a legal claim. The nature and extent of an individual's exposure and damages have to be evaluated based on the specific facts. 

Free Air Purifiers Are Available to Eligible Residents 

South Coast AQMD has also approved up to $5 million in additional funding for residential air filtration in communities affected by the fire. 

According to AQMD, eligible households in East Los Angeles, Boyle Heights, and West Commerce may receive HEPA air purifiers and a three-year supply of replacement filters at no cost. The program operates on a first-come, first-served basis while funding remains available. (AQMD) 

Residents can find current information about the program and the government's ongoing monitoring through South Coast AQMD's Palos Fire response page. 

McGonigle Law Is Representing Boyle Heights Fire Clients 

McGonigle Law is currently representing individuals affected by the 2026 Boyle Heights warehouse fire and continues to investigate potential claims arising from the incident. 

If you lived in Boyle Heights near the warehouse and believe the June 2026 fire or its aftermath affected your health, home, property, or finances, McGonigle Law can evaluate your circumstances and determine whether you may have a potential claim. 

There is no charge for the initial consultation. 

Call McGonigle Law at (800) 713-5260 or visit our Boyle Heights Warehouse Fire Lawsuit page to learn more.  

This article is for informational purposes only and does not constitute legal advice. Every case is different, and past results do not guarantee future outcomes.