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DULUTH, Ga., Nov. 14, 2026 — A hidden leak pushes a Gwinnett water bill into Tier 3 because the county charges more per 1,000 gallons as use rises. Duluth Water Leak Detection Pros explains the tier math, the county's leak-adjustment deadlines, and the meter test that connects a high bill to a leak.How Gwinnett's tiered rates work
Gwinnett County Water Resources charges single-family homes on a tiered residential rate, and the tier a gallon falls into depends on how much water the home uses in the month. The 2026 rates, published on the county's own Customer Care page, are: Tier 1, up to 8,000 gallons, $5.78 per 1,000 gallons; Tier 2, from 8,001 to 12,000 gallons, $8.67 per 1,000 gallons; Tier 3, more than 12,000 gallons, $11.56 per 1,000 gallons. Sewer is charged at $9.43 per 1,000 gallons. Those are the county's rates, not ours, and they are quoted here only so the tier math below can be followed.
The tiers are calculated in an escalating manner: each gallon is charged at the rate for the tier it falls into, not the whole month at the highest tier reached. A home that uses 9,000 gallons in a month pays Tier 1 on the first 8,000 gallons and Tier 2 on the next 1,000 — not Tier 2 on the whole 9,000. A hidden leak does not re-price the water a home was already using. It adds gallons on top, and those extra gallons are charged at the higher tier they fall into, which is why a leak pushes a bill up faster than the volume alone suggests.
How a hidden leak moves a bill up the tiers
A hidden leak adds gallons month after month while nobody sees it, and the tier math turns that volume into a bill that jumps more than the leak alone would suggest. The EPA's WaterSense program gives the national scale: the average household's leaks can waste more than 9,300 gallons of water a year, household leaks waste nearly 1 trillion gallons annually nationwide, and fixing easily corrected leaks can save about 10 percent on water bills. The same program notes that if a family of four exceeds 12,000 gallons per month, there could be serious leaks, and that a faucet dripping once per second wastes more than 3,000 gallons a year. All of those figures are national averages for all household leaks, not a promise for any one home. Note that 12,000 gallons a month is exactly the point where Gwinnett's Tier 3 begins.
Put the two together as an illustration, not a prediction. Take a home that normally uses around 8,000 gallons a month, at the top of Tier 1. Add a leak of the size the EPA describes as average — more than 9,300 gallons a year, which is roughly 775 gallons a month — and the home's use rises to about 8,775 gallons, with the extra gallons charged at the Tier 2 rate. Add a faster leak, closer to the dripping-faucet figure of more than 3,000 gallons a year, and the home is further into Tier 2. A leak that adds several thousand gallons a month pushes the home past 12,000 gallons, and every gallon above that line is charged at $11.56 per 1,000 gallons, twice the Tier 1 rate, plus sewer at $9.43.
The leak-adjustment rules, and the deadlines
Gwinnett County offers a leak adjustment: a request to have leak-period usage re-billed at the Tier 1 rate. The rules are set by the county's own leak-adjustment form, and they are strict in ways that matter for timing. An adjustment is allowed only once in a 12-month period. The request must be made within 3 months of the leak repair. Proof of repair is required. The county reviews the request in 2 to 3 business days. If approved, leak-period usage for a maximum of 2 months is billed at the Tier 1 rate. The form does not guarantee an adjustment: approval is the county's decision, not a filing service, and not something this site can promise.
The deadlines are the part most homeowners miss. A leak found in November and repaired in November must be reported within 3 months of the repair, and the adjustment can only cover up to 2 months of leak-period use. A leak that ran for four months before it was found will still have months of use that no adjustment can cover. That is why finding the leak early matters in money terms, not just in damage terms: every month a hidden leak runs is a month of Tier 2 or Tier 3 water that an adjustment may not reach. The form itself is submitted by fax to 678.376.6838 or by email to dwrcare@gwinnettcounty.com for residential customers.
How the meter test finds the leak behind the bill
The meter test is the check that connects a high bill to a leak, and it takes minutes. Turn every tap off, including toilets, washing machines, and dishwashers, and make sure no fixture is running. Read the meter, wait without using water, then read it again. If the meter moved, water is escaping somewhere on the supply side even though nothing is running, and the bill jump has a cause. If it did not move, either there is no flowing leak, or the leak is not running at the moment of the test — an intermittent leak may not be running while you watch, so repeat the test before treating one result as final.
Then run the shutoff test. Close the house shutoff valve and watch the meter again. If the meter stops, the leak is inside the house. If it keeps moving, the leak is in the buried line outside. That test decides whether the search is an inside check or an underground check. Bring the meter result to the call, with the bill volume for the month that jumped: the volume is what places the home in a tier, and the meter result is what places the leak on one side of the shutoff or the other.
What one customer's bill shows, and what it does not
One Gwinnett customer reported, in a January 2026 complaint recorded by the Better Business Bureau, a busted pipe near the water meter caused by freezing temperatures and a bill of $1,126.51. That figure is one customer's bill, reported by that customer, and it is used here only as an example of how large a single month's bill can become when a pipe breaks — not as a typical bill, not as an average, and not as a prediction for any other home. A burst pipe near the meter is a different case from a slow hidden leak: it releases a large volume quickly, and the bill reflects that volume at the tier rates above.
A bill that jumps because the reading was estimated, or because the household used more water, is not a leak, and the meter test separates the two.
On the call, bring your ZIP code, the bill volume for the month that jumped and for the month before it, whether the reading was estimated or actual, what the meter did with every tap off, and what the shutoff test showed. If the bill jumped and the meter does not move, say so: that pattern points the checks in a different direction, and it may mean the county, not detection, is the next call.
About Duluth Water Leak Detection Pros
Duluth Water Leak Detection Pros provides water and plumbing leak detection only in Duluth, Georgia. Services include slab, underground, water line, wall, ceiling, and non-invasive leak detection, using acoustic listening and thermal imaging. The company is licensed and insured, holds Georgia Master Plumber and Journeyman licences, and is a Certified Leak Detection Specialist. It serves Duluth 30096 and 30097, with coverage listed for ZIP codes 30095–30099; callers are asked to call with a street address to confirm coverage. The company is open 24 hours, with emergency services. No price is published; price is confirmed on the call before work starts.
Contact:
Duluth Water Leak Detection Pros
Duluth, GA 30096
Phone: (770) 214-4798
Email: info@waterleakdetectionduluthga.com
Website: https://waterleakdetectionduluthga.com/
Source: https://waterleakdetectionduluthga.com/gwinnett-tier-3-water-bill-hidden-leak-duluth/