When testing your agricultural water, it's important to use a clean container and collect samples in a way that represents the overall water quality. There are different methods to test water quality, but the most common ones for agricultural water testing are provided by the United States Environmental Protection Agency (USEPA). These methods have specific procedures that should be followed to ensure accurate results. One of the most important tests for agricultural water is the test for generic E. coli, which is an indicator for fecal contamination. You should send your samples to a laboratory certified by the National Environmental Laboratory Accreditation Program (NELAP) and request the USEPA approved methods.
- Approved USEPA Laboratory methods for E. coli detection in agricultural waters:
Collecting water samples for microbial testing
- FSMA: Aseptic water sampling (Western Institute for Food Safety and Security YouTube video, 5:47 min.)
- FSMA: Preparing to collect water samples (Western Institute for Food Safety and Security YouTube video, 3:48 min.)
- Muestreo de Agua - Water Sampling Recommendations in Spanish (University of Arizona Cooperative Extension via Fresh Produce Safety YouTube video, 4:47 min.)
- The Water Analysis Method Requirement in the FSMA Produce Safety Rule (Produce Safety Alliance, 2019) (PDF 188 KB)