Septic Tank Pumping in Harrison, TN
Harrison runs along the Highway 58 corridor on Chickamauga Lake, and 61.4% of its homes were built between 1970 and 1999, the highest share of any community we cover. Septic Pumping Chattanooga connects Harrison homeowners with independent local septic pumping, inspection and repair companies for free, no-obligation quotes.
Get a Free Quote Call (727) 300-6656A lake town whose septic tanks are mostly 25 to 55 years old
Harrison grew up beside Vann’s Ferry and served as the Hamilton County seat from 1840 until the courthouse moved to Chattanooga in 1870. When Chickamauga Dam closed in 1940 the new lake flooded much of the old town, and about a fifth of the CDP’s nine square miles is water today. Harrison Bay State Park, Tennessee’s first state park, was developed by TVA in the 1930s on about 1,200 acres.
The housing that followed the lake is overwhelmingly late-twentieth-century. Harrison is unincorporated, so sewer, where it exists, comes from the Hamilton County WWTA; no published map shows how far those lines reach, and the WWTA sewer-availability line, (423) 209-7842, is the way to check an address. A ranch or split-level from the 1970s or 1980s that was never connected is on a tank that is now 25 to 55 years old, often with lids buried under decades of lawn.
Harrison homes by the numbers
From the U.S. Census Bureau’s ACS 2024 5-year estimates for the Harrison CDP:
- Population: 8,011 in 3,398 occupied homes
- Median year built: 1979
- Built 1970–1999: 61.4% of units; built 2000 or later: 16.6%
- Owner-occupied: 69.7% (81.4% across the wider 37341 ZIP code)
TVA runs Chickamauga Lake between a summer pool of 681.5–682.5 feet and a winter level of about 675 feet, and NOAA’s 1991–2020 normals put 19.6 inches of rain into December through March. On August 12, 2025, 6.42 inches fell at the Chattanooga airport and Wolftever Creek near Ooltewah peaked at 1,650 cubic feet per second.
Which septic services matter most in Harrison
- Septic tank pumping. The EPA’s guidance is a pump-out every three to five years. Typical national ranges run $175–$300 for a 750-gallon tank and $225–$400 for 1,000 gallons (Fixr, 2025; estimates, not quotes). Ask for a flat fee to locate and dig a buried lid.
- Septic repair. Worn baffles, cracked lids and missing effluent filters are common findings on tanks of this age. A riser typically runs $300–$600. Work on the tank or field lines needs the homeowner’s $40 repair permit from Hamilton County Groundwater Protection.
- Septic inspection. Sales are the usual trigger. Tennessee real-estate rule 1260-02-.37 requires the agent to tell a buyer that a government inspection letter is available; Hamilton County sells its Inspection Letter for $105.
- Emergency septic service. Backups during a wet spell are the most common urgent call. A company can usually come the same or next day if one is available.
Whoever you hire for pumping should hold a TDEC Septic Tank Pumping Contractor permit (Rule 0400-48-01-.20) plus a Hamilton County pumper license; the TDEC Installers & Pumpers DataViewer and the county’s 2026 list are both public. See the septic pumping cost guide for the full table, then request a free quote.
Nearby areas: Ooltewah, Hixson and Collegedale.
Harrison septic questions
How often should a 1970s or 1980s Harrison septic tank be pumped?
Tennessee sets no pumping interval; TDEC Rule 0400-48-01-.13 makes the property owner responsible for maintaining the system. The EPA says household tanks are typically pumped every three to five years. Older Harrison tanks may be smaller than today’s sizing rule (900 gallons for three bedrooms), so ask the pumper to record capacity and sludge depth on the receipt.
Do Chickamauga Lake levels and heavy rain affect septic systems in Harrison?
TVA holds the lake at 681.5 to 682.5 feet in summer and about 675 feet in winter, and NOAA normals put 19.6 inches of rain in December through March. A drain field in saturated ground drains slowly during those weeks. If slow drains return every wet season, a septic inspection can tell you whether the tank, the field or the water table is the cause.
Who issues septic permits for Harrison homes?
Harrison is unincorporated Hamilton County, a TDEC contract county, so permits come from the Hamilton County Division of Groundwater Protection, 1250 Market Street, Suite 3046, Chattanooga, (423) 209-7876, online only since March 11, 2024. The homeowner’s repair permit is $40 and an Inspection Letter is $105. Routine pumping needs no homeowner permit, but the pumper needs a TDEC pumping permit and a county pumper license.
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