Septic Service in Gilmer, TX

Septic service in Gilmer and across Upshur County

Gilmer sits near the center of Upshur County on U.S. Highway 271, about 22 miles northwest of Longview and 35 miles northeast of Tyler, according to the Texas State Historical Association. It is the county seat, with a 2020 census population of 4,843, set in East Texas Piney Woods country. NETMWD’s rule is simple: if a building with sinks, tubs or showers is not served by a city sewer connection in Upshur County, it needs a permitted on-site system.

This is a free service: tell us what’s going on and we’ll get it handled for the Gilmer area.

Who issues septic permits in Gilmer?

Upshur County’s septic permits are handled by the Northeast Texas Municipal Water District (NETMWD), which serves as the TCEQ designated representative for Upshur, Morris, Marion and Cass counties. The TCEQ authorized agent lookup lists the Upshur County authorized agent for the unincorporated county, with its permit office in Hughes Springs and TCEQ’s Region 5 office in Tyler as the state contact.

New construction with water-using fixtures, and any repair or replacement of an existing system, starts with an application and fee sent to NETMWD.

Upshur County permit detail	What NETMWD publishes (program page, FAQ)
Single-family residence permit	$360 (fees changed October 1, 2023)
Multi-family or commercial permit	$610
Site and soil evaluation	Required on every property, by a licensed site evaluator or professional engineer
Homeowner installation	Allowed for a single-family home; anyone paid for the work needs an OSSF installer license
Working without a permit	Class C misdemeanor, up to $500 per violation, each day a new offense

For every county’s office and the 10 acre rule, see our septic permits by county guide.

The 10 acre rule on Upshur County land

Large rural tracts around Gilmer can sometimes skip the permit, but only when every condition in NETMWD’s FAQ is met:

1. The home is the only dwelling on the acreage.
2. The land is deeded as a single tract of at least 10 acres.
3. A site and soil evaluation is still done first.
4. The system matches what that evaluation calls for, using TCEQ-approved components.
5. The house is not a rental, a speculative build or a commercial property.
6. Every part of the system sits at least 100 feet from the property lines.

Add a second house or a rental cabin and each dwelling needs its own permit, so settle this before a new septic tank goes in the ground.

Creeks, Lake Gilmer and Lake O’ the Pines

Water shapes a lot of Upshur County, which drains two ways. The northern part flows to Little and Big Cypress creeks, and the southern part runs to the Sabine River, which forms the county’s southwestern border. Gilmer itself was first laid out near Little Cypress Creek and moved because of frequent floods there.

Lake Gilmer, on Kelsey Creek about four miles west of town, opened in 2001, covers 1,010 acres and is controlled by the City of Gilmer, per Texas Parks and Wildlife. In the county’s east, a small part of Lake O’ the Pines reaches into Upshur County, and Ore City sits about four miles below it. EPA advises keeping roof drains and other runoff away from a drain field, since extra water slows or stops treatment, which matters on low ground near any of these creeks.

Sandy topsoil over reddish subsoil

Upshur County is mostly covered by sandy, acidic, light-colored surface soils over deep reddish, mottled subsoils, per the Texas State Historical Association. NETMWD notes that soil class and texture, plus any sign of a seasonally high water table, decide which system a lot can use. That is why no one can promise a conventional or aerobic system before the site and soil evaluation is done.

Nearby Upshur County communities

The same NETMWD permit process applies across unincorporated Upshur County, including the land around these towns:

• Big Sandy, about 14 miles southwest of Gilmer where State Highway 155 meets U.S. Highway 80, with the Sabine River flowing just south of town.
• East Mountain, about 11 miles southeast of Gilmer, a small city whose limits reach slightly into Gregg County.
• Ore City, about 13 miles northeast of Gilmer on U.S. Highway 259, close to Lake O’ the Pines.
• Union Grove, a small city of 441 people at the 2020 census.

Part of Gladewater also lies in Upshur County, and Longview was platted in 1871 on land then in the southeastern corner of Upshur County before Gregg County was carved out in 1873. For Wood County, see the Mineola page.

Common septic problems in Gilmer

Around Gilmer, septic trouble usually lands in one of five jobs, and each has its own service page with more detail.

1. Septic tank pumping. EPA says household tanks are typically pumped every three to five years; HomeGuide’s national range for pumping is $300 to $700.
2. Septic repair. Slow drains and wet spots over the lines often trace back to roots, runoff or an overdue pump-out.
3. Aerobic system service. Units installed where the soil evaluation ruled out a conventional system need alarm, aerator and sprinkler care.
4. Inspection. Buyers of rural Upshur County land often want the tank and drain field checked before closing.
5. New installation. A new house or replacement system starts with the soil evaluation and the NETMWD application.

If sewage is surfacing in the yard or backing into a tub, stop using water and request a call back describing what you see.

Keeping an older system working

The simplest way to stretch the life of a septic system is to keep solids and grease out of the septic tank. EPA advises never pouring cooking oil or grease down the drain, skipping non-flushable wipes and limiting the garbage disposal. Our maintenance guide covers the rest, and the pumping cost guide explains what drives a quote.