According to the Health Department, collecting wastewater samples helps serve as an "early warning system" for detecting the virus in a community.
John's, Paradise, Conception Bay South, Gander, Torbay, Happy Valley-Goose Bay, Clarenville, Deer Lake, Corner Brook, Stephenville, Labrador City and Wabush to date.
The samples are analyzed by the Public Health Agency of Canada's National Microbiology Laboratory in Winnipeg at no cost to the province. .
Further, public health is also advising travellers who came through the Deer Lake airport between Nov. 19 and Nov.