Enter your wateriUniversal water parameters plus the fields specific to this segment. A blank or 0 means absent, not unmeasured — the two give different answers.
Enter the analysis (or import a lab report), then run. Fields adapt to the segment above.
Universal water parameters
Segment-specific
Pre-filled with a representative example — edit with your analysis.
Paste a lab analysis — two-column (field,value) or a CSV header + row. Aliases like “Calcium”, “Alkalinity” are recognised; impossible values are rejected, never guessed.
so where is this water headed?
2
Where it’s headediEvery scale-forming phase across your operating lever. This is thermodynamic tendency — whether a phase will form, never how fast (kinetics is a declared gap). SI by PHREEQC / WATEQ4F.
why — the evidence?
3
Why — the evidenceiSI = log₁₀(IAP/Ksp). SI > 0 = supersaturated (can scale); SI < 0 = cannot. It is a tendency, not a rate.
so what do you actually do?
4
What to doiThe decision this water calls for — derived from the limiting phase, your current operating point, and the headroom to it.
need the underlying detail?
5
Go deeper
Segment-specific tools ›
Best-operating band = near saturation (SI −0.5 to 0). Thermodynamic tendency across the operating lever — whether, never when. SI by PHREEQC / WATEQ4F.