Francesco Zinghinì
Author and curator of SepticCalcs.
Author and curator · SepticCalcs
Francesco Zinghinì is the author and curator of SepticCalcs. This is a truthful role: I am not a licensed septic designer, professional well driller, geotechnical engineer, plumber or financial advisor, and I do not claim any trade, engineering or finance credential.
My relevant, verifiable competence is building deterministic online calculators (open-source Python projects) and engineering training — rigor on the arithmetic and geometry. Every formula on this site shows its basis, every convention is cited under Sources, and every calculator is numerically self-checked against known values (see Methodology).
Everything here follows one rule: the tools must stay correct with no ongoing maintenance. That is why every calculator works only on the quantities you measure and the prices and rates you enter from your own quotes and bills — the site keeps no price list, no regional cost database and no live rates that would silently go stale. The only baked-in numbers are stable conventions (geometry, the 7.48-gallon and 17.1-ppm identities, tank-size-by-bedroom bands, perc → soil-loading bands, trench and lateral conventions, pressure-tank drawdown factors, the water-hardness scale) that are labeled as planning figures and cited so you can adjust them to your own project.
Septic and well work is a big spend and, at times, a health and water-safety matter. So every cost tool is framed as a planning estimate, not a bid; tools that touch septic design, drain-field sizing or well siting carry a plain reminder to have the design verified by a licensed septic designer or professional well driller and your local health department, and to pull the required permits and inspections; treatment tools remind you to test your well water with a certified lab. The aim is a neutral, free, no-signup reference you can use to sanity-check a contractor’s numbers — nothing that pretends to replace a professional.
Elsewhere
Reach me through the contact page.