A new advisory has been issued about firefighting foam that entered a brook and pond connected to the Farmington River after the B-17 crash at Bradley Airport on Wednesday.
The Department of Energy and Environmental Protection said the foam and other materials released into the environment were a result of the Oct. 2 plane crash.
DEEP said Thursday's rain could have caused the emergence of foam.
Foam surfaced at Watts Pond, an outflow of Rainbow Brook, and further downstream on the brook near Stevens Mill Road, according to a DEEP spokesperson.
Rainbow Brook flows south of Bradley Airport in Windsor Locks.
DEEP staff said they set up containment booms at these locations and used vacuum trucks to clean up the foam.
DEEP and other contractors will be at the scene this week to clean up and monitor the brook and pond for any more accumulation of foam.
Surface water samples have been collected from Rainbow Brook and the Farmington River and will be analyzed for PFAS and other chemicals associated with the incident.
Results are still expected to be released in the next week.
There is still no observation of foam in the Metropolitan District's sanitary system, according to the Windsor Health Department.
PFAS is a group of thousands of man-made chemicals that are widely used in consumer products, including products ranging from nonstick cookware to waterproof clothing to carpets to food packaging materials. According to DEEP and the state Department of Public Health, PFAS have been linked to health risks ranging from developmental effects in fetuses and infants to certain forms of cancer.
DEEP advises the public not to come in contact with the foam and if they see any to report it.