Have you ever had a coliform sample come back positive, gone through the trouble and expense of re-sampling, and discovered your first result was a false positive? If so, you know what a frustrating, time consuming, and expensive process it can be. One way to avoid having this happen to you is to be very rigorous in your sampling technique when you collect the sample. This video from our partners at the Rural Community Assistance Partnership (RCAP) walks you through the 13 steps of total coliform sampling, and discusses how to find a good sampling site. For more RCAP videos, visit their channel on Vimeo . For more on the Total Coliform and Revised Total Coliform Rules, see the EPA's website .