How many levels of ELL are there?

Could you please clarify what you mean by "ELL"? Assuming you're referring to English Language Learners, the number of levels can vary depending on the specific program or institution. However, in general, English language proficiency levels are often categorized into beginner, intermediate, and advanced levels, with each level potentially being further divided into sub-levels. The exact number of levels would depend on the specific curriculum or assessment system being used. Is there a particular program or context you're referring to?