What range do you look for? What type of geiger counter do you use to make informal surveys? What do you check - Metal or Dirt or pots and pans made in China?
For just a quick and dirty (pun intended) test for gamma/beta, a CDV-700 works nicely. If you are worried about a more intense environment, you need to abandon the Geiger counter and switch to an ionization counter. The scintillators are extremely sensitive instruments for initial surveys. Dosimeters come in two basic flavors these days. 0-200 milliroentgens and 0-200 Roentgens. There are others that read 0-20 or 0-100 etc, but these are the two main types readily available.
I check all types of stuff. Fun to see what is mildly radioactive.