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Firefighter foam is seen on the surface of water in Bensalem Township, Pennsylvania. A spill in Brunswick, Maine on August 19, 2024 raised concerns about PFAS contamination.
Forever chemicals were stored in tanks at an airport at more than 10,000 times the federal limit.
Maine officials in recent days have downplayed the public health risk posed by an accidental discharge of firefighting foam containing the toxic substances known as "forever chemicals" over a week ago, but initial tests on Monday revealed startlingly high concentrations of the chemicals near the airport where the spill occurred.
The state found that perfluorooctane sulfonic acid (PFOS), a type of synthetic perfluoroalkyl and polyfluoroalkyl substances (PFAS) that's been widely used to make firefighting foam and is still in circulation despite being phased out of production, was present in a chemical tank at Brunswick Executive Airport at a level of 3.2 billion parts per trillion (ppt).
The Maine Centers for Disease Control and Prevention (Maine CDC) advised the public not to consume freshwater fish from Mere Brook, Merriconeag Stream, Picnic Pond, and the site 8 stream near the airport, which is a former Naval Air Station.
The chemical tank fed firefighting foam concentrate into a fire suppression system that malfunctioned at Hangar 4 at the airport on August 19, sending the toxic foam into a nearby parking lot, down sewage and storm drains, and floating through the air at Brunswick Landing, a residential and business development in the area. About 1,500 gallons of the foam concentrate spilled.
The tests indicated a level of PFOS well over federal and state limits. Maine requires remedial action when PFOS is found at a level of 1,000 ppt in groundwater and 210 ppt for milk—while the federal drinking water standard is less than 4 ppt.
Samples taken at nearby drainage ponds found PFOS concentrations of a little over 1 million parts per million where the foam entered and 701 ppt where it would leave the ponds.
"In terms of risk, the next step is figuring where that water is going, and if it has reached a public or private drinking water source."
Exposure to PFOS, which are among the substances known as "forever chemicals" because they don't break down easily, have been linked to compromised immune and cardiovascular functions, decreased fertility, and several types of cancer—even in trace amounts, let alone the levels found after the spill.
Environmental toxicology expert Kurt Pennell of Brown University told the Portland Press Herald that officials would likely need to treat the water in the highly contaminated drainage ponds and determine whether the ponds now pose a risk to the public.
"In terms of risk, the next step is figuring where that water is going, and if it has reached a public or private drinking water source," Pennell told the Press Herald.
Officials are planning to continue taking samples from the drainage ponds, nearby water bodies, and Harpswell Cove—the part of Casco Bay where the ponds discharge—but despite the Maine CDC's warnings about freshwater fish in the Brunswick Landing area, the state Department of Environmental Protection (DEP) said in a statement last Friday that it does not believe nearby water wells will be impacted.
"We understand the concerns expressed by the community given the foam's visibility," the DEP said. "The Maine DEP and the Environmental Protection Agency have been studying the former Brunswick Naval Air Station for 30 years and are familiar with hydrogeology on the site. Although the site has a history of PFAS contamination, DEP continues to believe that the recently released material will not impact any nearby wells. The Brunswick-Topsham Water District has confirmed that the public water supply has not been impacted by this incident."
The Press Herald reported that because the public water district "taps distant aquifers" and the "groundwater under Hangar 4 flows away from nearby residential wells," people who rely on the area's water supply are not at risk.
The water district has increased its PFAS testing since the spill, and initial results are expected in September.
The Press Herald's editorial board on Sunday condemned state officials—both for allowing PFOS-laden foam to be stored at Brunswick Executive Airport at more than 10,000 times the federal limit, and the "conflicting and confusing" response to one of the country's largest firefighting foam spills in 30 years, marked by a "flamboyant" absence of transparency:
The Midcoast Regional Redevelopment Authority, the body created by the state to redevelop what is the former Brunswick Naval Air Station, said Monday that the cause of the spill remained under investigation. At the same time, state and town officials were reporting that the fire suppression system in the hangar in question had malfunctioned.
In a subsequent statement, the Midcoast Regional Redevelopment Authority said it was committed to "addressing the cleanup with the utmost urgency and transparency." It was heavily criticized for not adequately notifying local environmental organizations, businesses, or the broader public.
Brunswick officials referred reporters calling about the spill to the state, while state environmental officials would not release information about past forever chemical discharges at the airport—of which there have been several—and the U.S. Environmental Protection Agency "referred questions back to the state, even though the property is a contaminated Superfund site that requires long-term EPA monitoring and remediation," reported the Press Herald.
While state officials offered conflicting messages, Jared Hayes, a policy analyst with the public health watchdog Environmental Working Group, said the spill would "likely create a long-lasting contamination problem" in the area.
"Neighbors should be concerned," Hayes told the Press Herald. "So, yeah, this is a problem. It's a pretty big problem."
State toxicologist Andy Smith acknowledged that the harm PFOS can cause when people inhale foam, which was visible blowing around Brunswick Landing after the spill, is not yet known.
Brunswick officials announced they would host a public information session on Thursday, with state lawmakers as well as representatives from the Maine CDC and the DEP present.
The Press Herald editorial board accused state officials of responding to the disaster so far with the words: "Best of luck with that."
"Best of luck to our water supplies, ponds, brooks, rivers, beaches, and coves, now tainted by these chemicals which we know all too well to have potentially disastrous effects on human and animal health—even in trace quantities," wrote the editors.
"Just how much of this substance is there in Maine?" they added. "Who ensures that it is stored safely and securely? Who is liable for any escape of firefighting foam concentrate and PFAS-laden substances like it? What is the funding formula for the multimillion-dollar cleanup of incidents like this? What is the official protocol for testing exposed drinking water wells, relevant stormwater outfalls, and more? Where else has this happened?"
"The questions go on and on," wrote the board, "and we urgently need answers to all of them."
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Maine officials in recent days have downplayed the public health risk posed by an accidental discharge of firefighting foam containing the toxic substances known as "forever chemicals" over a week ago, but initial tests on Monday revealed startlingly high concentrations of the chemicals near the airport where the spill occurred.
The state found that perfluorooctane sulfonic acid (PFOS), a type of synthetic perfluoroalkyl and polyfluoroalkyl substances (PFAS) that's been widely used to make firefighting foam and is still in circulation despite being phased out of production, was present in a chemical tank at Brunswick Executive Airport at a level of 3.2 billion parts per trillion (ppt).
The Maine Centers for Disease Control and Prevention (Maine CDC) advised the public not to consume freshwater fish from Mere Brook, Merriconeag Stream, Picnic Pond, and the site 8 stream near the airport, which is a former Naval Air Station.
The chemical tank fed firefighting foam concentrate into a fire suppression system that malfunctioned at Hangar 4 at the airport on August 19, sending the toxic foam into a nearby parking lot, down sewage and storm drains, and floating through the air at Brunswick Landing, a residential and business development in the area. About 1,500 gallons of the foam concentrate spilled.
The tests indicated a level of PFOS well over federal and state limits. Maine requires remedial action when PFOS is found at a level of 1,000 ppt in groundwater and 210 ppt for milk—while the federal drinking water standard is less than 4 ppt.
Samples taken at nearby drainage ponds found PFOS concentrations of a little over 1 million parts per million where the foam entered and 701 ppt where it would leave the ponds.
"In terms of risk, the next step is figuring where that water is going, and if it has reached a public or private drinking water source."
Exposure to PFOS, which are among the substances known as "forever chemicals" because they don't break down easily, have been linked to compromised immune and cardiovascular functions, decreased fertility, and several types of cancer—even in trace amounts, let alone the levels found after the spill.
Environmental toxicology expert Kurt Pennell of Brown University told the Portland Press Herald that officials would likely need to treat the water in the highly contaminated drainage ponds and determine whether the ponds now pose a risk to the public.
"In terms of risk, the next step is figuring where that water is going, and if it has reached a public or private drinking water source," Pennell told the Press Herald.
Officials are planning to continue taking samples from the drainage ponds, nearby water bodies, and Harpswell Cove—the part of Casco Bay where the ponds discharge—but despite the Maine CDC's warnings about freshwater fish in the Brunswick Landing area, the state Department of Environmental Protection (DEP) said in a statement last Friday that it does not believe nearby water wells will be impacted.
"We understand the concerns expressed by the community given the foam's visibility," the DEP said. "The Maine DEP and the Environmental Protection Agency have been studying the former Brunswick Naval Air Station for 30 years and are familiar with hydrogeology on the site. Although the site has a history of PFAS contamination, DEP continues to believe that the recently released material will not impact any nearby wells. The Brunswick-Topsham Water District has confirmed that the public water supply has not been impacted by this incident."
The Press Herald reported that because the public water district "taps distant aquifers" and the "groundwater under Hangar 4 flows away from nearby residential wells," people who rely on the area's water supply are not at risk.
The water district has increased its PFAS testing since the spill, and initial results are expected in September.
The Press Herald's editorial board on Sunday condemned state officials—both for allowing PFOS-laden foam to be stored at Brunswick Executive Airport at more than 10,000 times the federal limit, and the "conflicting and confusing" response to one of the country's largest firefighting foam spills in 30 years, marked by a "flamboyant" absence of transparency:
The Midcoast Regional Redevelopment Authority, the body created by the state to redevelop what is the former Brunswick Naval Air Station, said Monday that the cause of the spill remained under investigation. At the same time, state and town officials were reporting that the fire suppression system in the hangar in question had malfunctioned.
In a subsequent statement, the Midcoast Regional Redevelopment Authority said it was committed to "addressing the cleanup with the utmost urgency and transparency." It was heavily criticized for not adequately notifying local environmental organizations, businesses, or the broader public.
Brunswick officials referred reporters calling about the spill to the state, while state environmental officials would not release information about past forever chemical discharges at the airport—of which there have been several—and the U.S. Environmental Protection Agency "referred questions back to the state, even though the property is a contaminated Superfund site that requires long-term EPA monitoring and remediation," reported the Press Herald.
While state officials offered conflicting messages, Jared Hayes, a policy analyst with the public health watchdog Environmental Working Group, said the spill would "likely create a long-lasting contamination problem" in the area.
"Neighbors should be concerned," Hayes told the Press Herald. "So, yeah, this is a problem. It's a pretty big problem."
State toxicologist Andy Smith acknowledged that the harm PFOS can cause when people inhale foam, which was visible blowing around Brunswick Landing after the spill, is not yet known.
Brunswick officials announced they would host a public information session on Thursday, with state lawmakers as well as representatives from the Maine CDC and the DEP present.
The Press Herald editorial board accused state officials of responding to the disaster so far with the words: "Best of luck with that."
"Best of luck to our water supplies, ponds, brooks, rivers, beaches, and coves, now tainted by these chemicals which we know all too well to have potentially disastrous effects on human and animal health—even in trace quantities," wrote the editors.
"Just how much of this substance is there in Maine?" they added. "Who ensures that it is stored safely and securely? Who is liable for any escape of firefighting foam concentrate and PFAS-laden substances like it? What is the funding formula for the multimillion-dollar cleanup of incidents like this? What is the official protocol for testing exposed drinking water wells, relevant stormwater outfalls, and more? Where else has this happened?"
"The questions go on and on," wrote the board, "and we urgently need answers to all of them."
Maine officials in recent days have downplayed the public health risk posed by an accidental discharge of firefighting foam containing the toxic substances known as "forever chemicals" over a week ago, but initial tests on Monday revealed startlingly high concentrations of the chemicals near the airport where the spill occurred.
The state found that perfluorooctane sulfonic acid (PFOS), a type of synthetic perfluoroalkyl and polyfluoroalkyl substances (PFAS) that's been widely used to make firefighting foam and is still in circulation despite being phased out of production, was present in a chemical tank at Brunswick Executive Airport at a level of 3.2 billion parts per trillion (ppt).
The Maine Centers for Disease Control and Prevention (Maine CDC) advised the public not to consume freshwater fish from Mere Brook, Merriconeag Stream, Picnic Pond, and the site 8 stream near the airport, which is a former Naval Air Station.
The chemical tank fed firefighting foam concentrate into a fire suppression system that malfunctioned at Hangar 4 at the airport on August 19, sending the toxic foam into a nearby parking lot, down sewage and storm drains, and floating through the air at Brunswick Landing, a residential and business development in the area. About 1,500 gallons of the foam concentrate spilled.
The tests indicated a level of PFOS well over federal and state limits. Maine requires remedial action when PFOS is found at a level of 1,000 ppt in groundwater and 210 ppt for milk—while the federal drinking water standard is less than 4 ppt.
Samples taken at nearby drainage ponds found PFOS concentrations of a little over 1 million parts per million where the foam entered and 701 ppt where it would leave the ponds.
"In terms of risk, the next step is figuring where that water is going, and if it has reached a public or private drinking water source."
Exposure to PFOS, which are among the substances known as "forever chemicals" because they don't break down easily, have been linked to compromised immune and cardiovascular functions, decreased fertility, and several types of cancer—even in trace amounts, let alone the levels found after the spill.
Environmental toxicology expert Kurt Pennell of Brown University told the Portland Press Herald that officials would likely need to treat the water in the highly contaminated drainage ponds and determine whether the ponds now pose a risk to the public.
"In terms of risk, the next step is figuring where that water is going, and if it has reached a public or private drinking water source," Pennell told the Press Herald.
Officials are planning to continue taking samples from the drainage ponds, nearby water bodies, and Harpswell Cove—the part of Casco Bay where the ponds discharge—but despite the Maine CDC's warnings about freshwater fish in the Brunswick Landing area, the state Department of Environmental Protection (DEP) said in a statement last Friday that it does not believe nearby water wells will be impacted.
"We understand the concerns expressed by the community given the foam's visibility," the DEP said. "The Maine DEP and the Environmental Protection Agency have been studying the former Brunswick Naval Air Station for 30 years and are familiar with hydrogeology on the site. Although the site has a history of PFAS contamination, DEP continues to believe that the recently released material will not impact any nearby wells. The Brunswick-Topsham Water District has confirmed that the public water supply has not been impacted by this incident."
The Press Herald reported that because the public water district "taps distant aquifers" and the "groundwater under Hangar 4 flows away from nearby residential wells," people who rely on the area's water supply are not at risk.
The water district has increased its PFAS testing since the spill, and initial results are expected in September.
The Press Herald's editorial board on Sunday condemned state officials—both for allowing PFOS-laden foam to be stored at Brunswick Executive Airport at more than 10,000 times the federal limit, and the "conflicting and confusing" response to one of the country's largest firefighting foam spills in 30 years, marked by a "flamboyant" absence of transparency:
The Midcoast Regional Redevelopment Authority, the body created by the state to redevelop what is the former Brunswick Naval Air Station, said Monday that the cause of the spill remained under investigation. At the same time, state and town officials were reporting that the fire suppression system in the hangar in question had malfunctioned.
In a subsequent statement, the Midcoast Regional Redevelopment Authority said it was committed to "addressing the cleanup with the utmost urgency and transparency." It was heavily criticized for not adequately notifying local environmental organizations, businesses, or the broader public.
Brunswick officials referred reporters calling about the spill to the state, while state environmental officials would not release information about past forever chemical discharges at the airport—of which there have been several—and the U.S. Environmental Protection Agency "referred questions back to the state, even though the property is a contaminated Superfund site that requires long-term EPA monitoring and remediation," reported the Press Herald.
While state officials offered conflicting messages, Jared Hayes, a policy analyst with the public health watchdog Environmental Working Group, said the spill would "likely create a long-lasting contamination problem" in the area.
"Neighbors should be concerned," Hayes told the Press Herald. "So, yeah, this is a problem. It's a pretty big problem."
State toxicologist Andy Smith acknowledged that the harm PFOS can cause when people inhale foam, which was visible blowing around Brunswick Landing after the spill, is not yet known.
Brunswick officials announced they would host a public information session on Thursday, with state lawmakers as well as representatives from the Maine CDC and the DEP present.
The Press Herald editorial board accused state officials of responding to the disaster so far with the words: "Best of luck with that."
"Best of luck to our water supplies, ponds, brooks, rivers, beaches, and coves, now tainted by these chemicals which we know all too well to have potentially disastrous effects on human and animal health—even in trace quantities," wrote the editors.
"Just how much of this substance is there in Maine?" they added. "Who ensures that it is stored safely and securely? Who is liable for any escape of firefighting foam concentrate and PFAS-laden substances like it? What is the funding formula for the multimillion-dollar cleanup of incidents like this? What is the official protocol for testing exposed drinking water wells, relevant stormwater outfalls, and more? Where else has this happened?"
"The questions go on and on," wrote the board, "and we urgently need answers to all of them."