Water testing glossary
State-certified drinking-water laboratory
A laboratory identified by a state certification program for drinking-water analyses. Water Testing Finder bases directory inclusion on official state certification lists. Check the laboratory’s current certification scope and sample acceptance directly.
Total coliform bacteria
A testing category named in the US Environmental Protection Agency’s private-well guidance. This definition does not interpret health risks.
Analyte or test scope
The substance or category shown in a laboratory’s certification record. A record does not by itself establish residential sample acceptance or current sample instructions.