Calculators
Free tools built on the tables and formulas that public health agencies and university extension services publish. Each one shows how it calculates and links to its sources.
- Well water test planner Tick what applies to your home and get the tests public health agencies suggest, and why. You enterYour situation, nearby land use, plumbing Open the tool
- Well shock chlorination calculator How much plain bleach to use for your well’s size, water depth and bleach strength. You enterCasing diameter, water depth, bleach % Open the tool
- Water softener size calculator Turn your hardness test into grains per day and see how often each softener size would regenerate. You enterHardness, people, water use Open the tool
- Septic pumping calculator Estimate years between pump-outs from your tank size and household, using extension tables. You enterTank size, people, garbage disposal Open the tool