Per pdf Resolution No. 121119B (703 KB) , Barrett Township Supervisors have set the 2020 budget and millage rates.
For comparison purposes, I have constructed the following table showing the 2020 vs. previous millage rates:
How is the millage rate calculated?
The county, municipality, and school district (taxing authorities) set their budgets for 2020. The taxing authority then divides its budget by the total assessed value of all property within the area it serves to arrive at a millage rate. (source)