Here is the County Data for each of the municipalities. If you click on clear all, you can reset, and then double click on the name of the municipality you want to see to get it to show it's line. There are a lot of lines and that was the best way I could thing of organizing it. I should try to add a hover to the lines, but I haven't had a chance to figure out how to do that in d3

It's a bit hard to tell where the municipalities are since so many are grouped near the bottom, but the top 5 currently are

1. West Chester Borough 
2. West Goshen Township
3 Tredyffrin Township
4 East Goshen Township
5 New Garden Township

 West Chester Borough is the current leader and are far enough ahead that it will be for some time. Hopefully the state of emergency will tamp things down a bit. I only started collecting this data, so I don't have much to show what drove the numbers there. Next up is my home township, West Goshen. Well behind the Borough, but still far enough ahead of the others that we will be second for a while. Proximity to the borough could be the cause of the numbers being so high here, but I really don't know. After that is Tredyffrin, although it's further back nearer to the others, so it may change as time goes on. Not really sure why that is higher, may be due to population density. East Goshen is next, probably for similar reasons as West Goshen. New Garden is currently 5, which is mushroom country. After these are the Phoenixville, Coatesville, and Kennett Square, who seem all to have done a good job at managing this, having numbers near the middle, despite being somewhat urban spaces.

The bottom 5 currently are 

68 Newlin Township 
69 Highland Township 
70 East Nantmeal Township 
71 Modena Borough 
72 Elverson Borough

These are all around the same, less than 10 cases. They all seem to be rural or small municipalities, so no big surprises.