EPA Monitor Data Non-Attainment/ Attainment Information

I am playing around with some EPA monitor data. I was wondering if the EPA has a dataset that indicates when their monitor is classified as “nonattainment”, “unclassifiable/attainment”, or “unclassifiable”? Here is what this is defined as from the EPA’s website

“If the air quality in a geographic area meets or is cleaner than the national standard, it is called an attainment area (designated “attainment/unclassifiable”); areas that don’t meet the national standard are called nonattainment areas.”

I feel like I have seen this before in a dataset, but I am having a hard time finding it now. Any help is appreciated!