Why Is My Water Bill So High? A Forsyth County Hidden-Leak Checklist

A suddenly high water bill can be a billing-cycle issue, a change in household use, or the first warning of a leak you cannot see. The fastest way to tell the difference is to stop guessing and work through the home in a deliberate order.

For Forsyth County Water & Sewer customers, the bill may reflect water used weeks earlier. The County says meters are read about every 28–32 days and bills are generated about one to two weeks later. Start by comparing the gallons used, not just the dollar total, and note the meter-reading period shown on the bill.

If gallons jumped without an obvious explanation, use this checklist before the next billing cycle gets away from you.

First, rule out normal reasons for higher water use

Think back over the entire billing period. Did you:

• Run lawn irrigation more often during hot or dry weather?


• Fill or top off a pool?


• Have overnight guests?


• Pressure-wash, wash vehicles, or use a hose for a project?


• Install a new appliance, irrigation schedule, humidifier, or water treatment system?


• Have a toilet that occasionally “runs” or refills by itself?

If the increase still does not make sense, treat it as a possible leak. Forsyth County offers a free WaterSmart portal where customers can review usage and receive high-use or leak alerts. Set up alerts now—even if you solve the present problem—because they can provide an earlier warning than the next paper bill.

The no-water-use test: determine whether water is still flowing

The U.S. Environmental Protection Agency recommends comparing the water meter before and after a two-hour period when no water is used. For a clean test:

1. Turn off faucets, showers, washing machines, dishwashers, irrigation, pool autofill, humidifiers, and other water-using equipment.


2. Ask everyone in the home not to flush toilets or use water during the test.


3. Record the meter reading or the available usage data in WaterSmart.


4. Wait two hours without intentionally using water.


5. Check again. Any unexplained change suggests water is flowing somewhere and needs to be traced.

Do not operate or force the utility’s curb-stop valve, and do not damage a meter lid or communications equipment. If the meter area is flooded, damaged, unsafe, or difficult to access, call Forsyth County Water & Sewer rather than experimenting.

What the usage pattern can tell you

These patterns are clues, not final diagnoses:

• Steady use all night: often points to a running toilet, service-line leak, irrigation leak, pool autofill, or water-treatment equipment.


• Short spikes at the same time each day: check irrigation schedules, softener regeneration, pool equipment, and appliances.


• One large spike: look for a hose left on, an irrigation malfunction, pool filling, or an unusual household event.


• Meter movement after the home’s interior main shutoff is closed: may point to a leak between the meter and the shutoff, or to an outdoor branch that splits off before it. The exact piping layout matters, so this clue should be confirmed by a qualified professional.

Check toilets before opening walls or digging

Toilets are a common source of silent water loss. EPA WaterSense says household leaks can waste about 180 gallons per week and worn toilet flappers are often responsible.

Test every toilet:

1. Put a few drops of food coloring in the toilet tank, not the bowl.


2. Do not flush.


3. Wait 10 minutes.


4. If color appears in the bowl, water is leaking past the flapper or flush-valve seal.


5. Flush immediately after the test so the coloring does not stain the tank or bowl.

Also listen for periodic refilling and make sure the water level is not running into the overflow tube. A properly matched flapper is often a straightforward repair, but recurring leaks may involve the flush valve, fill valve, tank hardware, water pressure, or an incompatible replacement part.

Inspect the easy-to-miss indoor sources

Use a flashlight and look—without touching energized equipment—at:

• Sink supply lines and shutoff valves


• Dishwasher and refrigerator supply lines


• Washing-machine hoses and connections


• The cabinet floor beneath every sink


• The ceiling below bathrooms or laundry rooms


• Crawlspace piping and insulation


• Water-heater connections and the drain pan


• The water-softener or filtration drain line


• Tub and shower areas that remain damp when unused

Never cap, plug, or close a water-heater temperature-and-pressure relief discharge pipe. Water coming from that pipe can indicate an unsafe temperature or pressure condition and needs qualified evaluation.

If water is near an electrical panel, outlet, light fixture, appliance, or energized equipment, stay out of the wet area. Shut power off only if you can do so without approaching water, and call the appropriate emergency or licensed professional.

Check the yard, irrigation system, and service line

Walk from the meter toward the home and look for:

• An unusually green strip or fast-growing patch of grass


• Soft soil, standing water, erosion, or a sunken area


• Water surfacing when irrigation is off


• Hissing near the service-line route


• Low water pressure throughout the home


• Irrigation heads that bubble, stay wet, spray poorly, or do not retract


• Water running from a broken irrigation valve box

Small irrigation leaks can be expensive. EPA WaterSense estimates that an irrigation leak only 1/32 inch in diameter can waste about 6,300 gallons per month.

Do not begin exploratory excavation around a suspected service line. Georgia 811 instructs homeowners and contractors to submit a locate request at least three business days before digging, wait for facility responses and markings, and verify the ticket status before excavation. A private service line or irrigation line may not be marked by every utility owner, so ask what is and is not included in the locate.

Is the leak the County’s responsibility or the homeowner’s?

The location of the leak matters. Forsyth County’s adjustment process specifically addresses qualifying leaks on the customer side of the water meter. If you see water at the meter, near the road, or in an area that could involve the public system, report it to Forsyth County Water & Sewer and let the County determine the responsible side before authorizing excavation.

If the leak is on the customer side, arrange prompt repair and document everything. Do not assume that a high bill will automatically be removed.

How to preserve a possible Forsyth County leak adjustment

Forsyth County maintains a Water Leak Adjustment Policy and application form. Eligibility and documentation rules can change, so review the current form before relying on a credit.

As soon as a leak is suspected:

1. Save the bill and screenshots of the unusual WaterSmart usage.


2. Photograph visible water, damaged areas, failed parts, and the repair location.


3. Write down when the leak was discovered, isolated, and repaired.


4. Keep paid invoices, itemized receipts, and a clear description of the cause and completed repair.


5. Complete the County’s current adjustment form and attach every required document.


6. Submit it through the method listed by the County. The billing page currently lists leakadjustment@forsythco.com, fax (770) 781-3044, and a mailing address at 2435 Freedom Parkway, Suite 1200, Cumming, Georgia 30041.


7. Call Water & Sewer Customer Service at (770) 781-2160 if you are unsure how to handle the amount due while a request is under review.

Do not ignore the bill while gathering documentation. Forsyth County’s billing page states that late balances can receive a 10% penalty and that past-due amounts can subject service to disconnection.

What is reasonably DIY—and where should you stop?

Homeowners can generally perform observation and low-risk checks such as reviewing usage, conducting a toilet dye test, looking for moisture, and replacing a clearly identified accessible toilet flapper when they are comfortable doing so.

Stop and obtain qualified help when the problem involves:

• A buried water service line or any excavation


• Concealed piping inside walls, ceilings, slabs, or crawlspaces


• A main shutoff that does not work or will not fully close


• Active flooding or widespread water damage


• Water-heater relief discharge, overheating, or pressure concerns


• Sewage, contaminated water, mold, or structural damage


• Water near electrical equipment


• Pipe alterations, permits, inspections, or uncertainty about code

Forsyth County provides a Plumbing Only Permit and specifically identifies fixture work with piping alterations as permit-relevant. Before changing or replacing piping, confirm the current requirement with Forsyth County Building & Licensing—or with the City of Cumming if the property is inside city jurisdiction.

Georgia’s plumbing board states that only a licensed Master Plumber, not a Journeyman Plumber, may operate a plumbing business. For underground, concealed, permitted, or substantial plumbing repairs, verify the professional’s active Georgia license and confirm who will obtain the permit and inspection.

A high bill is a warning—use it quickly

The goal is not merely to reduce the next bill. Hidden leaks can damage cabinets, subfloors, drywall, insulation, foundations, landscaping, and personal property. A good response identifies whether water is still moving, narrows the likely source, stops damage safely, preserves documentation, and places regulated work with the right licensed trade.

If you also see a ceiling stain or active indoor water, use our related guide: What Should You Do When You Find a Leak or Ceiling Water Stain?

For a local overview of permits and specialty-trade boundaries, read: Do You Need a Permit or Licensed Contractor for Home Repairs in Forsyth County?

Need help narrowing down the source?

Kingdom Home Services helps Cumming, Forsyth County, and North Atlanta homeowners document symptoms, inspect accessible areas, handle appropriate home-maintenance and handyman repairs, and coordinate licensed or permit-required work with qualified trade professionals when necessary.

Call (404) 904-6547 or request an estimate. If water is actively flooding the home, shut off the interior main only if it is safe and call an emergency plumbing professional. Call 911 for an immediate electrical, fire, or life-safety hazard.

This article provides general homeowner education, not a site-specific diagnosis, engineering opinion, legal interpretation, or substitute for the applicable utility, permit authority, insurer, or licensed trade professional.