There is a company here in Dallas that can test the water for you. All you have to do is mail in your samples and they'll get you the results.

Contact them first for specific sampling instructions before mailing anything in.

Pope Testing Laboratories, Inc.
Consulting Analytical Chemists
2220 Hinton Drive
Irving, TX 75061
972.871.2892 voice
972.871.7452 fax

Here's what parameters will need to be tested:
Bacteriological Test
Calcium
Magnesium
Sodium
Bicarbonate
Carbonate
Sulphate
Chloride
Soluble Sodium Percentage (SSP)
Sodium Abosorption Ratio (SAR)
pH

SAR and SSP give an indication of the ratio of the desireable and undesireable salts.

It is important to submit two samples 1) directly from the well water and 2) a sample from the pond (away from where the well is filling).

Hope this info helps. Good luck!