Who Issues Septic Permits in Maury County? (Not the County)

If you are building, repairing, or buying acreage in Maury County and you need a septic permit, the single most common wrong turn is calling the county. Maury County Environmental Health Services does exist, and it does handle environmental permitting — for food service establishments, hotels, public pools, organized camps, child care facilities, school plants, and tattoo parlors. Its own page routes septic elsewhere.

The actual authority

Subsurface sewage disposal in Tennessee is administered by the Tennessee Department of Environment and Conservation (TDEC), Division of Water Resources, under Rule 0400-48-01 and the statutory authority of T.C.A. Title 68, Chapter 221, Part 4.

Nine Tennessee counties signed agreements to run their own septic programs — Blount, Davidson, Hamilton, Jefferson, Knox, Madison, Sevier, Shelby, and Williamson. Maury is not one of them. Your application goes to the state.

What you can apply for

• Conventional system permit — the standard new install
• Repair permit — required before any work on a failing system, and it carries no fee
• Modification permit — adding bedrooms is the common trigger
• Alternative system permit — low-pressure pipe, mound, lagoon, drip
• Subdivision evaluation — dividing land into two or more lots
• Inspection letter — documentation of an existing system's status
• Certificate of verification — a self-certifying document for an existing system serving a new residence

The fees

Set by rule, not by the county, and the same statewide:

These are permitting fees only. They are not what the job costs. The soil consultant, the licensed installer, the tank, and the excavation are all separate, all private, and none of them are published by anybody — which is why you will not find a number for them here.

Timeline

TDEC states review generally takes ten days and must be completed within forty-five days of submission. A construction permit expires three years from the date of issuance.

Lot size minimums

Where percolation testing establishes suitability, the state minimum is 20,000 square feet with public water and 25,000 square feet with a private well. Every lot must also accommodate a duplicate area meeting the same standards — space held in reserve for the replacement field.

Sinkholes and shallow rock

Maury County sits in Tennessee's limestone belt, and the state rule addresses it directly. Water table must be at least four feet below the bottom of the disposal field, and rock formations more than four feet below the trench bottoms. Slopes over 30% require a demonstration that sewage will not surface; over 50% is unsuitable outright. Conventional systems are prohibited where absorption is faster than ten minutes per inch. Sinkholes are generally unsuitable unless bedrock is at least four feet deep, slope is 30% or less, there is no flooding risk, and all other criteria are met — and even then trench depth in a sink is capped at 30 inches.