5 Reasons Your Tennessee Water Bill Arrived High Even When Your House Sat Empty

Nashville’s water and sewer rates went up 3% on January 1, 2026, and Metro Water Services folded the increase into every bill mailed since February.

Seeing a higher water bill makes sense after a summer of laundry, dishes, and a sprinkler running many evenings.

It makes far less sense after three weeks with your house locked up while you’re on vacation.

These are the reasons a Tennessee water bill can arrive high even when your house sat completely empty.

Note: This is general information, not financial or legal advice. Water, sewer and stormwater rates and fees vary by utility and are subject to change.

1. Zero Gallons, Same Charge

Tennessee water and sewer bills carry a fixed charge that has nothing to do with how many gallons ran through the meter.

Nashville’s Metro Water Services charges $6.12 for water and $9.78 for sewer every month on a standard 5/8-inch meter, before the meter counts a single gallon.

The first two hundred cubic feet (CCF), about 1,496 gallons, are already folded into that fixed amount, so a home that uses less than that still pays as if it hit the line.

Knoxville Utilities Board runs a similar setup under a different name, billing an $18.00 water charge and a $35.90 wastewater charge it calls Basic Service, effective this July.

The charge doesn’t depend on usage at all.

Nobody’s exempt.

Memphis Light, Gas and Water frames it as a minimum bill instead of a base charge, but the effect is the same: An account owes a floor payment no matter how little water moves.

2. Stormwater Fees, Unrelated to Water Use

Nashville’s water bill carries a stormwater fee that has nothing to do with water use at all.

Metro Water Services bases that monthly charge on how much impervious surface sits on a property: The roof, the driveway, and the patio all count, anything that keeps rain from soaking into the ground.

A house with 2,001 to 6,000 square feet of hard surface pays $6.00 a month for stormwater, and a bigger lot with more pavement pays $11.00.

The fee never depends on a meter reading.

It’s fixed either way.

A vacant home doesn’t get a break just because nobody flushed a toilet or ran a load of laundry for weeks.

3. Leaks Nobody’s There to Notice

A Tennessee home’s water meter keeps counting even when everyone who lives at the house is three states away.

A worn flapper or a stuck fill valve can drip or run for weeks without a single person home to hear it.

Empty houses still leak.

Nothing about the meter changes just because the house sits empty.

White House Utility District, which serves homes north of Nashville, walks customers through a simple check: Shut off every fixture, record the meter reading, wait a few hours without using any water, then read it again.

If that second reading went up, water moved somewhere it shouldn’t have.

Even a documented leak doesn’t erase the whole bill.

White House Utility District only grants an adjustment once usage more than doubles the normal average, and even then it credits back just half the excess, capped at three months.

The rest stays on the bill.

4. Estimates Instead of Actual Readings

A Tennessee water bill can arrive built on a guess instead of an actual meter reading.

Memphis Light, Gas and Water (MLGW) says on its own site that a locked gate, an overgrown yard, or bad weather can keep a meter reader from reaching a meter.

When that happens, MLGW calculates the bill from the account’s usage history and that month’s weather instead of an actual number.

Guesses aren’t gallons.

That history doesn’t reflect an empty house.

During a vacancy, the utility can bill a home close to its normal amount even though the meter barely moved.

MLGW says the guess doesn’t last, though. Once a meter reader gets an actual number, the utility reconciles the bill and credits back anything it overcharged.

The utility credits the overcharge back eventually.

Eventually isn’t the same as the day the inflated bill lands in the mailbox.

Tennessee’s own meter-reading rule limits how long a utility can lean on a guess in the first place.

State regulation 1220-04-03-.08 requires meters to be read at least once a quarter and bars a utility from sending a customer two estimated bills back to back.

That rule binds Tennessee American Water and the other utilities the Tennessee Public Utility Commission regulates, though MLGW’s status as a Memphis-owned municipal utility keeps it under the estimating practice described above instead.

5. The Cost of Reactivating Service

Turning a Tennessee water bill back on after a vacancy comes with a price tag of its own.

Tennessee American Water, which serves the Chattanooga area, charges a flat $25 fee anytime it turns a customer’s water service back on, under a rate tariff the Tennessee Public Utility Commission (TPUC) has on file as TPUC No. 20.

That tariff spells out the charge for restoring service on an account that was already active, the exact situation a vacation shutoff creates.

That fee has nothing to do with how much water moved.

It costs to restart.

A homeowner who asks the utility to shut off service before a long trip, then calls to restart it on the way back, pays that fee on the very first bill after the house sat empty.