Hello, Margaret, and thank you for your inquiry. Of all the at-home drinking water test kits that we carry, the one named SenSafe Water Quality Test Kit offers the largest different tests and its WaterWorks and SenSafe brands of included water test strips have an excellent reputation -- and are manufactured here in the United States.

If you want a more complete testing of your well water, or have good reason to suspect contamination, we suggest taking a look at mail-in test kits from National Testing Laboratories. In particular, the Well-Check Water Testing Package covers a great number of the possible contaminants a person may possibly find in their well water.

Why is that?  Simple:  No laws require that their owners test them for continued water quality once they get approved for use.  That means a well which passed muster for arsenic (and other contaminants) three years ago may now contain dangerous levels of contaminants and no one knows it.

What can a private well owner do?  They COULD send their water out for laboratory analysis, which could cost them a pretty penny OR they could pick up an easy-to-use, accurate field test kit for arsenic in water like this:

Arsenic Quick Home Water Quality Test Kit

The kit above has a detection range of 0.0, 0.005, 0.01, 0.02, 0.06, 0.1, 0.3, 0.5, >0.5, >0.5 ppm (mg/L) and you may also use this kit for determining the arsenic concentration of soil. With a total test time of just 12 minutes, this inexpensive (< $25 USD) home water test kit makes testing well water for arsenic with EPA/ETV Test Verified Performance accuracy as easy as it will ever get.

Also, for those of you interested in testing down to even lower levels, we recommend you consider the other easy-to-use, field-ready home water test kits for arsenic in the Arsenic Testing section of the Water Test Kit Store.  Each kit shares the same reliability, accuracy and dependability as the original Arsenic Quick kit and uses the same proven chemistry.

• Arsenic Quick II — <1, 2, 3, 4, 5, 6, 7, 8, 10, 13, 20, 25, 30, 40, >50, >80, >120, >160 ppb (micrograms/L)
   
• Arsenic Low-Range Quick — <0.5, 1.0, 1.5, 2, 3, 4, 5, 6, 7, 8, 12, >20, >30, > 50 ppb (micrograms/L)

For those with more extensive testing needs, all the above kits (and more) come in larger sizes. Find more information on the full line of Arsenic Quick test kits. . . Here.