Anaerobic plate count measurement context
A count of the anaerobic bacteria in a sample: those that grow without oxygen on the test medium. Like other plate counts, it reflects the organisms that grow under the test conditions, not every bacterium in the water. It is used for wells, process water and systems where oxygen-free conditions develop. Plate counts are expressed as colony-forming units (CFU) per volume tested.
Plan collection and receipt together
Define the organism or indicator, test portion and enumeration or presence/absence question. Use the assigned bottle and collection instructions and coordinate delivery around the method requirements.
Include the complete project requirement
Provide the matrix, target analytes, required method, fraction, units and reporting limits. Include the permit or monitoring instructions where results will support a regulatory submission. Naming this method does not establish blanket compliance eligibility.
Resolve collection before sampling
Use the bottle, preservation and delivery instructions assigned to the agreed scope. Identify each location and collection time, and document any deviation. The final analytical plan must fit the submitted material and its intended use.
Related testing & guidance
Technical & service references
Vanguard service detailsSource review: November 8, 2026. The agreed method and project scope govern the testing.