NOAA Weather radio as an mp3 stream or as flash player base stream from Dresden Maine. This covers the capitol district of Maine and includes China, Waterville and Damariscotta. The stream is captured here in China and uploaded to the WeatherUnderground. Here is a map of the signal strength for the station, which motivated capturing the stream for rebroadcast on the internet.
If the stream is not available, check on the NOAA Outage page.
The next two day forcast of air quality can be found at this Maine State DEP site, http://maine.gov/dep/air/ozone/