The Ministry of Environment says the substance found in Little Lake was "relatively clear in appearance."

Residents have long pushed for access to real-time air quality information. But some say the newly-public data doesn’t actually tell residents when the air they’re breathing could be unsafe.

Community leaders from Sarnia and Aamjiwnaang First Nation met with the environment minister Wednesday to discuss a health study.

“This should be a wake-up call,” said Federal NDP environment critic Linda Duncan.

“Senior management have met regularly with industry representatives and ignored related concerns from the Amjiwnaang First Nation," Ontario engineers claim in a leaked report.

“Hearing the stories of people affected on the Global expose, I think anyone that watched that, it was moving,” Ontario PC Leader Patrick Brown told reporters.

There are growing calls for a health study on communities near Sarnia's Chemical Valley following a Global News investigation.

For one couple in rural Ontario their peaceful retirement was shattered when wind turbines began popping up.