TEXAS · TCEQ REGION 09 · 20 COUNTIES
Aerobic septic systems in TCEQ Region 09 (Waco)
TCEQ Region 09 office (Waco)
6801 Sanger Ave, Ste 2500, Waco TX 76710-7826
Main line: 254-751-0335
TCEQ does not permit septic systems in any of these 20 counties. For an OSSF permit or a maintenance report, use the county's authorized agent in the table below.
From TCEQ's regional office directory, read Oct 31, 2026.
TCEQ Region 09 (Waco) covers 20 Texas counties: Bell, Bosque, Brazos, Burleson, Coryell, Falls, Freestone, Grimes, Hamilton, Hill, Lampasas, Leon, Limestone, Madison, McLennan, Milam, Mills, Robertson, San Saba and Washington.
All 20 counties permit on-site sewage facilities through a local authorized agent (a health district or a county), and maintenance reports go to that agent.
Reports are due within 14 days after the test (30 TAC §285.7(e)(1)(B)). No county in this region has published how maintenance providers submit the report, so every county page here says so rather than guessing.
25,048 aerobic systems were authorized across the region from 2015 to 2025. In 2025, 2,988 of the region’s 4,017 on-site sewage facility authorizations were aerobic (74.4%).
Counties in TCEQ Region 09 (Waco)
| COUNTY | PERMITTING AUTHORITY | HOW TO FILE | AEROBIC 2015–25 | AEROBIC 2025 | MPs |
|---|---|---|---|---|---|
| Bell | Bell County Public Health District | Not confirmed | 5,293 | 613 | 21 |
| Bosque | Bosque County | Not confirmed | 506 | 58 | 2 |
| Brazos | Brazos County | Not confirmed | 3,027 | 284 | 23 |
| Burleson | Burleson County | Not confirmed | 1,488 | 177 | 6 |
| Coryell | Coryell County | Not confirmed | 572 | 49 | 11 |
| Falls | Falls County | Not confirmed | 534 | 78 | 1 |
| Freestone | Freestone County | Not confirmed | 540 | 75 | 1 |
| Grimes | Grimes County | Not confirmed | 2,549 | 326 | 12 |
| Hamilton | Hamilton County | Not confirmed | 139 | 20 | 1 |
| Hill | Hill County | Not confirmed | 1,960 | 246 | 11 |
| Lampasas | Lampasas County | Not confirmed | 587 | 59 | 7 |
| Leon | Leon County | Not confirmed | 763 | 112 | 8 |
| Limestone | Limestone County | Not confirmed | 950 | 118 | 3 |
| Madison | Madison County | Not confirmed | 732 | 78 | 2 |
| McLennan | Mclennan County | Not confirmed | 3,899 | 410 | 23 |
| Milam | Milam County | Not confirmed | 622 | 96 | 4 |
| Mills | Mills County | Not confirmed | 37 | 6 | 0 |
| Robertson | Robertson County | Not confirmed | 635 | 101 | 1 |
| San Saba | San Saba County | Not confirmed | 16 | 14 | 2 |
| Washington | Washington County | Not confirmed | 199 | 68 | 7 |
MPs are licensed OSSF maintenance providers whose license mailing address is in the county. Each provider is counted once, where it is based; many also work in neighboring counties.
Permits across the region, 2015–2025
| YEAR | ALL OSSF | SURFACE (SPRAY) | DRIP |
|---|---|---|---|
| 2015 | 2,022 | 1,148 | 28 |
| 2016 | 2,340 | 1,326 | 29 |
| 2017 | 2,816 | 1,627 | 33 |
| 2018 | 2,910 | 1,754 | 45 |
| 2019 | 3,091 | 1,891 | 76 |
| 2020 | 3,751 | 2,291 | 140 |
| 2021 | 4,016 | 2,534 | 112 |
| 2022 | 4,819 | 3,337 | 117 |
| 2023 | 4,212 | 2,775 | 138 |
| 2024 | 3,790 | 2,482 | 177 |
| 2025 | 4,017 | 2,793 | 195 |
Authorizations to Construct from the eleven annual TCEQ “Types of Systems Installed” reports, summed over the region’s counties. Surface irrigation and drip both require aerobic pretreatment. The statewide dataset has the CSV, and the 2025 report compares the regions.
The rules are the same in every county
- · An aerobic system with surface application is tested every four months (30 TAC §285.91(4), Table IV). How often systems are inspected.
- · Each report goes to the permitting authority and the owner within 14 days of the test (30 TAC §285.7(e)(1)(B)). The deadline rule.
- · A new aerobic system starts with a two-year service policy (30 TAC §285.7(c)). After that the owner renews the maintenance contract or, for a single-family home, may maintain the system themselves where local rules allow (§285.7(d)(4)). What the contract must say.
Common questions
Which counties are in TCEQ Region 09 (Waco)?
20 Texas counties: Bell, Bosque, Brazos, Burleson, Coryell, Falls, Freestone, Grimes, Hamilton, Hill, Lampasas, Leon, Limestone, Madison, McLennan, Milam, Mills, Robertson, San Saba and Washington.
Who permits aerobic septic systems in TCEQ Region 09 (Waco)?
All 20 counties permit on-site sewage facilities through a local authorized agent (a health district or a county), and maintenance reports go to that agent.
How many aerobic septic systems were permitted in the Waco region?
25,048 aerobic systems were authorized across the region from 2015 to 2025. In 2025, 2,988 of the region’s 4,017 on-site sewage facility authorizations were aerobic (74.4%).
When is an aerobic maintenance report due in TCEQ Region 09 (Waco)?
Within 14 days after the date the test is performed, everywhere in Texas. 30 TAC §285.7(e)(1)(B) requires the report to go to the permitting authority and to the system owner.
The other fifteen TCEQ regions
Data as of Oct 5, 2026, from the TCEQ authorized-agent register, the OSSF license register, the annual “Types of Systems Installed” reports and the counties’ own pages. How we research and check this. Not legal advice. Verify with your permitting authority.