Disclaimer

The calculators and content on SepticCalcs.com are provided for general information and planning.

Estimates, not guarantees

Results are deterministic estimates from your inputs, your prices and standard reference conventions (tank gallons = L × W × liquid depth × 7.48; absorption area = design flow ÷ soil loading rate; trench length = area ÷ effective width; pressure-tank drawdown = run-time × GPM ÷ acceptance factor; ppm ÷ 17.1 = gpg). Real projects vary — verify measurements and figures before relying on them, and always get itemized written quotes from licensed contractors.

Not a bid, not a price index

Cost tools give planning estimates from your own prices, not bids or contracts, and we store no material, drilling or service price list, labor-rate database or regional cost index.

Septic design, drain-field sizing & well siting

Septic design, drain-field sizing and well siting must be verified by a licensed septic designer or professional well driller and approved by your local health department. Sizing rules, setbacks, perc / soil-loading requirements and permits vary by jurisdiction. Confirm the design, pull the required permit and get the required inspection before you dig or drill. Nothing here is engineering design or a substitute for a professional assessment.

Water safety

Treatment tools are about sizing and cost, not safety. Sizing a softener, filter or UV unit is not a substitute for a water test. Test your well water with a certified laboratory before choosing treatment; this site does not tell you whether your water is safe to drink and makes no potability or water-safety claims.

No financial advice

The well-vs-city ROI and budget tools are illustrative math on the figures you enter — not financial advice. Drilling cost, water rates, well life and your usage vary, and savings are never guaranteed. For sizing, design, permitting or financing decisions, consult a qualified professional.