I have a dataset of number of bacterial colonies grown from 11 water samples taken from 3 different watersheds. I want to know if the land area, population, number of waste water treatment plant outfalls, and number of septic tanks in the watershed have any effect on the bacterial growth. The samples are skewed, with 8 from one watershed A, 1 from B, and 2 from C.

Essentially I am trying to compare 3 treatments by categorical numbers, since the land area is one of three numbers, right? I am confused and don't know which test to use, please help! I've attached a file of the data table if this post is confusing. I am grateful for any advice.

Essentially I am trying to compare 3 treatments by categorical numbers, since the land area is one of three numbers, right? I am confused and don't know which test to use, please help! I've attached a file of the data table if this post is confusing. I am grateful for any advice.

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