COVID-19: Wastewater Testing Data

People infected with the virus that causes COVID-19 may shed it in the water that flows from their homes to public wastewater systems. This happens whether they have symptoms or not. Communities can track virus activity by looking for viral RNA in wastewater. Wastewater, or sewage, includes water that may contain human waste (toilets, showers, sinks). It also includes water from some other sources (rainwater, water for industrial use). To better understand the burden of COVID-19 in a community, Maine CDC and U.S. CDC test wastewater for the virus. This helps to tailor public health actions to protect communities across the state.

For technical details about these data, visit the Biobot Technical Frequently Asked Questions.

Maine CDC oversees a COVID-19 wastewater testing program at 16 sites across Maine, and U.S. CDC oversees a COVID-19 wastewater testing program at eight additional sites in Maine. For additional data visualizations, visit Biobot COVID-19 Wastewater Monitoring.

Download Maine CDC Wastewater Testing Reports

Testing site County Last updated
Bangor Wastewater Treatment Plant (PDF)Penobscot1/27/2023
Bath Wastewater Treatment Plant* (PDF)Sagadahoc1/30/2023
Belfast Influent in Waldo County (PDF)Waldo1/30/2023
Bethel Wastewater Treatment Plant* (PDF)Oxford1/30/2023
Blue Hill Influent (PDF)Hancock1/30/2023
Boothbay Harbor Sewer District* (PDF)Lincoln1/27/2023
Brunswick Influent** (PDF)Cumberland1/30/2023
Calais Influent (PDF)Washington1/30/2023
East Millinocket Wastewater Treatment Plant (PDF)Penobscot1/26/2023
Fort Kent Maine Pumping Station (PDF)Aroostook1/31/2023
Greater Augusta Utility District (GAUD) Wastewater Treatment Plant (PDF)Kennebec1/20/2023
Guilford-Sangerville Sanitary District* (PDF)Piscataquis1/27/2023
Houlton Wastewater Plant (PDF)Aroostook1/31/2023
Lewiston-Auburn Composite (PDF)Androscoggin1/30/2023
Machias Influent (PDF)Washington1/27/2023
Moosehead Headworks (PDF)Piscataquis1/27/2023
Portland Water District, East End Wastewater Treatment Facility** (PDF)Cumberland1/27/2023
Portland Water District, Westbrook-Gorham Regional Wastewater Treatment Facility (PDF)Cumberland1/27/2023
Presque Isle Utilities District Wastewater Treatment Plant (PDF)Aroostook1/27/2023
Rockland Wastewater Treatment Facility* (PDF)Knox1/30/2023
Sanford (Mousam) Pump Station* (PDF)York1/30/2023
Wilton Sewer Plant Influent* (PDF)Franklin1/30/2023
Yarmouth Wastewater Department* (PDF)Cumberland1/30/2023
York Sewer District Plant Influent** (PDF)York1/27/2023

*U.S. CDC sites: Find additional wastewater data on the U.S. CDC COVID Data Tracker. Data visualizations may not represent the same numbers as presented here due to differences in data cleaning among testing vendors, Maine CDC, and U.S. CDC.

**These sites are participating in broader wastewater surveillance with WastewaterSCAN. Find additional wastewater data and visualizations here.