The 'viral load' has seen a rise of between 10% and 50%.
Higher levels of the Covid-19 virus have been found in wastewater in recent weeks.
The latest report from the HPSC, shows higher levels of the virus in the majority of samples taken at the start of the month.
The 'viral load' increased by between 10% and 50% in 23 of 29 locations around the country.
The presence of the Covid-19 in wastewater is linked with the circulation of the virus among the population.
The HPSC's latest report shows there were 46 cases of the virus reported in the midlands last week - 24 of those were in Westmeath, followed by 15 in Offaly, and seven in Laois.
Government Considers Compulsory Helmet Use For E-Scooter Riders
Westmeath Family Blogger Backs 'Mental Health' Days
Enterprise Minister Confirms He Was Overpaid
Offaly Driving Instructor Calls Out Lack Of Clear Road Markings
Occupied Territories Bill Needs Enactment - Brian Stanley
Laois Gaelscoil To Reopen In Time For 20th Anniversary
Enoch Burke To Be Re-Arrested For Repeated Trespass
Laois Brothers Sentenced Over Rape And Assault Charges
Laois TD Questions EirGrid On Energy Capacity
Westmeath Library Re-Opening Pushed Back
Government Action Urged On Prison Conditions
Offaly GAA Club Submit New Pitch Plans
Gardaí Attend Scenes Of Midlands Crashes
Midlands Counties See Dramatic Fall In Housing Commencements
Westmeath Councillor Calls For Baby Loss Certificate Scheme
Commemorative Walk For Ashling Murphy To Take Place In New York
Sentencing Adjourned For Offaly Father Whose Son Died In Arson Attack
Gardaí Seize Heroin, Crack Cocaine And Cash In Offaly Town
Opposition TD Calls For Minister Overpayment Ultimatum
Investigation Underway After Suspected Arson At Westmeath Home