Common Testing Methods

1. Visual Inspection
   • Look for reddish-brown slime, oily sheens, or rust-colored deposits in tanks, pipes, or fixtures.
   • Swampy, musty, or petroleum-like odors are also telltale signs.
2. BART (Biological Activity Reaction Test)
   • A field-friendly test kit (e.g., from Hach) that uses nutrient media to detect iron-related bacterial activity.
   • A red color change in the inner tube indicates bacterial presence.
3. Microscopic Examination
   • Water samples are stained and examined under a microscope to identify filamentous or slime-producing bacteria.
4. Culture-Based Methods
   • Samples are plated on selective media and incubated to count colony-forming units (CFU/mL).
   • Often used in conjunction with iron concentration testing.
5. Spectrophotometry

Measures dissolved iron levels and can indirectly support bacterial activity   assessment.