PQO Opener

File Type



U.S. Geological Survey


Misc Files





How to open PQO file?

PQO File Opener

The software referred to as PQO Opener allows you to freely work with PQO files, including opening their contents. The first thing you should do is double-click the PQO file icon you want to open. If you have the correct software your problem should be resolved. After clicking, your PQO file should open in the program that is assigned as default for handling PQO files on your device. Sometimes, however, various problems arise, below you will find the instructions that you should follow.

Open PQO files in 9 steps

In case it is not possible to open the PhreeqcI file without additional steps, follow the steps below

  1. Make sure that the operating system where you are trying to open the PhreeqcI file is supported by it. If the user tries to open the file PhreeqcI on a system other than Windows, it may fail.
  2. Make sure that the default application for the files PQO, PhreeqcI or one of the following is installed in the operating system. If there is no such program, install it (or download it earlier).
  3. Verify that the default application for handling PQO files is one of the following software tools: PhreeqcI, . If this is not the case, you should manually set the program, preferably by editing the properties of the PhreeqcI file and displaying the applications available on the system that allow you to open it. On the list, search for one of the PhreeqcI, applications and confirm.
  4. Software programs that open PQO file extension

  5. If the PhreeqcI file has been downloaded from the Internet or copied from another medium, it may be corrupt. In this case, although one of the PhreeqcI, programs is installed, the PhreeqcI file cannot be opened. Re-downloading or copying the file may fix the problem.
  6. The antivirus program can identify the virus with which the PhreeqcI file has been infected and at the same time blocks the opening of the file. The best solution in this case is to run a virus scanner and check the system for viruses.
  7. Check that the PhreeqcI file format is not outdated. Sometimes it happens that despite the PQO extension, such files contain data saved in a way that prevents them from being opened by PhreeqcI or .
  8. To open the PhreeqcI file, the current version of the program in which we want to open it is required. Determine the version of your program and, if necessary, install the latest one.
  9. Sometimes the user unknowingly tries to open a file with a shortcut that points to a place where the file is no longer there (it may have been previously deleted).
  10. The system administrator has restricted the opening and modification of certain files, which in this case may include PhreeqcI.

Useful tools

If, after performing the above steps, you still have problems opening the PQO file, you can try using some tools available on the web. The list below presents web pages that specialize in opening PQO files.


Free Online File Open Service


open PQO file PQO opener PQO open free online


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