Stagnant lines, aging plumbing, and biofilm-friendly conditions let opportunistic bacteria (Legionella-class, Pseudomonas-class, and others) grow undetected. The OPO Test gives commercial, healthcare, and residential operators a same-day microbial profile of their building water.

Standard residential test kits do not detect them. Lab-based Legionella testing exists but takes 10 to 14 days and covers only a specific subset of organisms.
The OPO Test extends the Retego microbial workflow to detect the broader class of opportunistic organisms typical of pipe biofilm communities. 24-hour result on the same TTR-2 platform.
Healthcare
A facilities manager at a regional hospital tests building water at sixty sample locations. Same-day result identifies three high-risk fixtures for immediate remediation. No 14-day lab wait while exposure continues.
Hospitality
A hospitality group reopening properties after a low-occupancy season runs the OPO Test on building water before guests return. Bacterial communities are detected and remediated before the first booking is honored.
Residential
A homeowner with unexplained skin or respiratory symptoms requests a Retego home test. The OPO Test identifies bacterial communities standard residential tests would miss entirely.