With a lot of attention being placed on the state of water in both groundwater and city water, it’s more important than ever to test your water. How to take samples of both groundwater and bio-traps, however, may not be abundantly clear. This article will go over instructions on how to take samples from both to ensure that your water is safe.


Many US residents rely on groundwater as their main source of water. If you don’t live in a city, then there is a good chance that you’re receiving your water from a well. This well collects groundwater over time and is pumped through your house. Understandably, because it’s groundwater that fills your well, you may be uncomfortable at the thought of what is actually residing in your water. Pollutants within the rain, from the ground, and even in the well itself can all contaminate your water. Without a proper water filter put into place on your sinks and showers, you may be ingesting and washing in water that could be hurting you.

To sample your water, you should follow these instructions. In regards to sampling water for DNA, you should use the proper equipment. A 1L Poly bottle with a screw cap is the best bottle for this procedure. It’s also recommended that you wear gloves to prevent contamination from occurring. For DNA samples, you require 1L of water. Dip the bottle into the water source until the correct amount is gathered. Then seal the cap and label it with the sample’s name, date, and analysis. You’ll want to place the bottle in a cooler. Then you can ship it to the proper company for testing.

In regards to sampling for PLFA analysis, you will need a 1-2L Poly bottle. Otherwise, the instructions are the same as those listed above.


A bio-trap sampling, on the other hand, requires further time to be properly saturated with possible contaminants. You simply place the device within the water and let it rest for 30-60 days. This single device can be used for various tests. It offers a large surface area for microbes and other pollutants to attach itself to during submersion.

Sampling Made Easy

Both are excellent methods for sampling water. For fast results, you should test manually with a single Poly bottle. For many analyses, you should select a bio-trap. The latter will provide you with an ability to test for more pollutants at a single time. However, the former has the advantage of being faster to obtain and to test. Depending on your needs, you can select which is the best form of sampling groundwater for you.