01Your problem: sewage is coming up instead of going down
A sewer backup is one of the most unpleasant plumbing emergencies a homeowner can face. It usually shows up first at the lowest drain in the house: a basement floor drain, a ground-floor shower, or a tub that fills with dirty water when a toilet is flushed. Stop using water in the house right away, including dishwashers and washing machines, because every gallon you send down the drain has nowhere to go. Keep children and pets away from the water and treat anything it touched as contaminated.
The next question is whether the blockage is in your private sewer line or in the public sewer. That matters because it decides who fixes it. The City of Gainesville Department of Water Resources tells residents who have a sewer backup to contact its water and sewer repairs shop at 770-535-6881. Its directory lists 770-535-6877 for emergencies on nights, weekends and holidays. Calling the city first is a reasonable step when you are not sure where the problem is.
02Your line or the main: how to tell
Clues that point toward your own line include a single slow fixture, a backup that only happens when your own washer drains, or a known history of roots in the yard. Clues that point toward a shared problem include neighbors reporting the same thing at the same time, or sewage coming up from a cleanout or manhole near the street. None of these are certain. When in doubt, the city's repairs shop is the number its FAQ gives for sewer backups.
If the city determines the public side is clear, the blockage is in the private line that runs from your house to the public sewer, and a plumber is the next call. The leak FAQ draws the same owner-versus-city line for water service, placing the owner's responsibility on the house side and the department's on the street side. Our emergency checklist covers the general first steps.
03Who bills your sewer, and why it matters
Not every home in the Gainesville area is on City of Gainesville sewer. The city's brochure lists separate wastewater rates for customers of Hall County, Oakwood, Flowery Branch and Braselton sewer systems, all billed through Gainesville water accounts, and some homes are on a septic system instead. The table shows the residential rates. If your bill lists a different provider, the brochure gives that provider's number for non-billing questions, such as Hall County at 770-531-6800 or the City of Oakwood at 770-534-2365.
If you are on septic, a backup is a septic system question rather than a public sewer question, and the county's environmental health rules apply. This site covers plumbing inside the house and on city water and sewer; for a septic tank, ask the provider you hire to confirm whether the problem is in the house drain or the tank and drain field.
| Sewer provider | Rate | Billed on | Residential cap | Source |
|---|---|---|---|---|
| City of Gainesville (inside or outside city limits) | $10.85 | 95% of metered water | None billed above 8,000 gallons | Gainesville DWR 2026 brochure |
| Hall County | $11.26 | 93% of metered water | None billed above 8,000 gallons | Gainesville DWR 2026 brochure |
| Oakwood, served by Gainesville | $11.07 | As billed by Oakwood | Ask the City of Oakwood | Gainesville DWR 2026 brochure |
| Flowery Branch sewer, inside city | $12.50 base + $14.11 unit | 100% of metered water | Not stated | Gainesville DWR 2026 brochure |
Water still running? Close your private shutoff, then send a Free Quote Request.
Free Quote Request04What a plumber will look for
For a private-line blockage, a plumber will usually look for a cleanout where the line can be opened and cleared, and may inspect the line to find out why it blocked. Roots, grease and items that should not be flushed are common culprits. If the line is broken or collapsed, the repair can become a replacement, and the City of Gainesville lists plumbing upgrades, alterations or replacements among the work that requires a permit inside city limits.
Hall County's plumbing fee schedule includes a $15.00 item for a septic tank connection or city sewer connection, alongside the $35.00 minimum fee for issuing a permit. If a repair includes reconnecting to the sewer, ask whether a permit is needed and who is pulling it. The Hall County fee page lists the published items.
05Grease, wipes and preventing the next backup
The City of Flowery Branch runs a fats, oils and grease control program for its sewer system, a reminder that grease is a concern for sewer operators across the area. Grease poured down a kitchen drain cools and hardens in the pipe. Wipes, even those labeled flushable, do not break down the way toilet paper does. Neither problem shows up the day it starts; they build until a line blocks.
Simple habits help: scrape plates into the trash, wipe greasy pans with a paper towel before washing, and keep a trash can in every bathroom. If roots have blocked your line before, ask the plumber about the condition of the pipe and what can be done to reduce the risk. Our burst pipe guide and leak detection guide cover the supply side of the house.
06After the backup: cleanup, photos and the bill
Photograph the affected rooms, the drain that overflowed and anything damaged before cleanup starts. If you have homeowner's insurance, check whether your policy covers sewer backup, since that is a policy question rather than a plumbing one. Run fans and keep the area ventilated, and wear gloves when handling anything the water touched.
When you send a Free Quote Request, choose Sewer backup or clogged drain and mention whether the city has already checked the main. That one detail tells the independent plumbers who receive the request a lot about the job. If you also suspect a supply leak, the high water bill guide explains how to read the meter.
Sources: City of Gainesville Water Resources: Water Leaks & Water Quality FAQs; City of Gainesville: Water Resources staff directory (customer service, after-hours emergency line); City of Gainesville Dept. of Water Resources: Water and Wastewater Rates, Fees and Policies (July 2026 brochure, PDF); City of Gainesville: Building Permit (projects requiring permits; 2024 ICC codes effective Jan. 1, 2026); Hall County Board of Commissioners: Building Inspections Fee Schedule (PDF); City of Flowery Branch: After-Hours Water/Sewer Emergency Contact. Checked 2026-10-26.
Send the details once. Independent plumbers who serve Hall County can follow up.
Free Quote RequestQuestions from Hall County homeowners
Who do I call for a sewer backup in Gainesville, GA?
The City of Gainesville Water Resources FAQ says to contact the water and sewer repairs shop at 770-535-6881. The directory lists 770-535-6877 for nights, weekends and holidays.
Is Hall County sewer billed on my Gainesville water bill?
For many accounts, yes. The brochure lists Hall County residential sewer at $11.26 per 1,000 gallons on 93% of metered water, with nothing billed above 8,000 gallons.
Does Hall County charge a permit fee for a sewer connection?
The fee schedule lists $15.00 for a septic tank connection or city sewer connection, with a $35.00 minimum fee for issuing a plumbing permit.