Well Testing

In order to get ready for the well test, we ask you to do the following before we arrive:

1. Find out from your well drilling company:

    - How many feet is the pump set below the well head?

    - How deep was the well drilled?

    - What is the well's casing diameter?

    - What was the static water level when the well was drilled?

2. Verify that there is a vent opening in the well head - usually a hole with 1/2" or larger pipe threads, typically with a plastic plug screwed in.  See the picture below.  Older wells may not have a vent opening; if so, you will need to contact one of the local well drillers and have a vent opening installed.


3. Check that the vent plug can be removed.  There should be no obstructions in this hole or below it, as we need to screw our instrument into the pipe threads.  The sonic signal must pass freely from the vent opening into the well.

3. How far away is the nearest electrical outlet from the well head?

4. Is the well inside a building, or in the open?

5. Please take a close up (1-2 feet away) photo of the well head with the vent opening in the foreground.  This allows us to see if we need to bring additional plumbing fittings to adapt to your well head.

6. Email the photo and answers to the questions to ecmc-info@sonic.net.  Thank you!


When we arrive and have started recording the water level, we will ask you to draw enough water to trigger the pump once. This could be done by watering of your landscape.  Once the pump triggers, the water draw will be shut off so the pump does not run again.

Well head with vent.jpg