Nope, the powers that be at that site apparently decided that they were no longer needed. I have instead inserted these two urls into my menu under Air Quality:
US Air Quality:
https://gispub.epa.gov/airnow/?monitors=ozonepm and
Fire and Smoke:
https://fire.airnow.gov/Right now the US Air Quality map isn't displaying, but the Fire and Smoke is. The latter is actually the more interesting of the two maps anyway.