Consider the following:

1. Polution sources

2. Location

3. Access4. References of the siter

5. Siters statistics of success

6. Guarantees and money back. The yield and depth of other boreholes in the area

8. Securing the hole in the future

9. Distances from both power and water points

Insist on a site report including a location sketch, GPS coordinates, breaks, expected water yield and depth. This information is needed for you to register a borehole.