In parts of the city and the region, monitors are showing higher “very unhealthy’ levels, with increased health risks for everyone.

The ashy air reached hazardous levels today – in some cases, the equivalent of smoking a cigarette every 10 minutes.

The report notes that the fish kill was traced to a stormwater outfall located near a swim club. The pool owner denied discharging chlorinated water, and the source of the discharge remains unknown, MDE says.