Why this leak can change a bill
Underground leaks can become expensive quickly.
The fastest way to confirm the estimate is to check the meter when all fixtures are off. If the meter still moves, water may be flowing somewhere in the home or yard.
Water leak cost
Service Line Leak Cost Calculator
Estimate how much a service line leak could add to a water bill by gallons per minute, days leaking, water rate, and sewer charges.
Water bill
$114
Water use$46.00
Sewer$41.00
Service$27.00
All-in rate
$15.83 per 1k gal
Best next check
Leak and irrigation
Service line leak inputs
Estimate a leak by flow rate, days leaking, water rate, and sewer charge relationship. Use your bill for a better local rate.
Water wasted
86,400 gal
Estimated gallons lost during the selected period.
Added cost
$972
Water charge plus an estimated sewer charge.
Water charge
$540
The usage portion based on your rate per 1,000 gallons.
Daily pace
$32.40
How much the leak may add each day.
Useful checks
Tools that can make the estimate more accurate
Water leak detector
Helps catch hidden leaks under sinks, near water heaters, or around laundry areas.
Toilet leak detection tablets
A low-cost way to check whether a toilet flapper is wasting water.
Low-flow shower head
Can reduce water use for households where showers drive the monthly bill.
Links may become affiliate links when an associate tag is configured. Product checks are optional and are not required to use the calculators. Read disclosures.
Related water bill checks
Water bill explainer
Separate usage, base, sewer, stormwater, and service charges.
Open pageAll water leak calculators
Browse the leak index for toilets, faucets, showers, irrigation, and service lines.
Open pageNormal water usage
Compare the leak estimate against normal household gallons per month.
Open pageWater savings calculator
Estimate the monthly savings after repairing the leak or reducing gallons.
Open pageShower Leak Cost Calculator
Start with 0.1 gallons per minute and adjust rate, days, and sewer charges.
Open pageIrrigation Leak Cost Calculator
Start with 1.5 gallons per minute and adjust rate, days, and sewer charges.
Open pageWater Heater Leak Cost Calculator
Start with 0.25 gallons per minute and adjust rate, days, and sewer charges.
Open pageToilet Leak Cost Calculator
Start with 0.2 gallons per minute and adjust rate, days, and sewer charges.
Open pageFaucet Drip Cost Calculator
Start with 0.03 gallons per minute and adjust rate, days, and sewer charges.
Open pageFAQ
Short answers for search visitors and bill-checking moments.
How much can a service line leak cost?
This calculator starts with 2 gallons per minute for service line leak, then multiplies by time, water rate, and an optional sewer charge multiplier.
Why include sewer charges?
Many water bills include sewer or wastewater charges tied to water use. If your bill does not apply sewer charges to leaks, set the multiplier to 0.
What should I check first?
Turn off indoor fixtures and watch whether the meter still moves.