Of the three newly confirmed outbreaks, two are in Michigan and one is in Idaho.
The tracker will help with surveillance, but it doesn't distinguish the influenza A subtype or determine the source of the virus.
Wastewater detections began in early March, and so far sequencing hasn't found any mutations linked to human adaptation.
The assistance is meant to both improve on-site biosecurity and address financial losses connected to lost milk production in herds affected by H5N1.
Monitoring of about 70 farm workers found no symptoms, and the state's wastewater sampling pilot has found no flu rise.
Also, another avian flu outbreak was reported in backyard poultry in Idaho.
Wastewater treatment systems that have no intake of animal-related sewage could serve as sentinels for human disease, experts say.
Researchers who examined cow mammary gland tissue found wide expression of avian and human influenza A receptors, which could explain high virus loads in milk of infected cows.
The patient worked at a farm where the illness was suspected in cows and in a region where H5N1 was confirmed in other dairy herds.
In other developments, the USDA said ground beef samples were negative for the virus and Michigan and Colorado announced emergency measures.
