An environmental group is sounding the alarm about the city's main sewage and stormwater system after finding trash like condoms, sanitary wipes and tampons floating in Toronto harbour last month. Mark Mattson, an environmental lawyer and the founder of Swim Drink Fish — a volunteer group working to create swimmable, drinkable, and fishable water for everyone — told CBC Toronto he went to Ontario Place to check out the quality of the water the day after a large storm on July 24.