We had a similar situation but where we had a number of different thresholds for different servers and different drives.
We used a generic alert for all drives and set up a custom property for each drive that contained a percentage of utilization that corresponded to a threshold.
This way we have one table to query for the thresholds and you can easily join to add the hostname to the report.
We have a standard default set of values all drives get and using this method allows for adjusting based on server and application needs.
Benefit is one alert works for all which makes it scalable and yet it is greatly adjustable all at the same time.