Technical notes for water treatment engineers
Indices, saturation, and risk screens explained with mechanism — not lorem. Written for service-company chemists and the engineers who treat industrial systems. Model documentation and program guides follow.
Technical note · 7 min
Holding time index as a risk screen
Holding time and related residence-time screens flag stagnation risk for Legionella programs — they do not replace temperature, disinfectant, and water-management plans.
2026-05-18 · Jim Green
Technical note · 9 min
What CCPP actually tells you
Calcium Carbonate Precipitation Potential quantifies how much CaCO3 can form or dissolve — and what assumptions still hide behind the number.
2026-04-02 · Jim Green
Technical note · 8 min
Why LSI is not enough
Langelier Saturation Index is a useful screen for CaCO3 tendency — and a poor substitute for speciation, CCPP, and wall-condition modeling.
2026-03-12 · Jim Green