Williamson, TX
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Williamson in Texas · Population: 643,889
TRI sites such as Contemporary Products of Texas Inc; Durcon Inc; Valero Taylor Terminal; SDWIS systems such as CITY OF GEORGETOWN; CITY OF ROUND ROCK; CITY OF CEDAR PARK anchor Williamson, TX's EPA extract. Derived burden score 49/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Williamson include MANVILLE WSC; JONAH WATER SUD; CITY OF HUTTO, while Contemporary Products of Texas Inc leads reported TRI pounds among local Form R filers. No AQS county monitors report here.
Burden score 49/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Williamson -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Williamson, TX: EPA TRI 2023 reporting year
Same facilities, both years
+2622.8%
15 facilities that filed in 2022 and 2023
Whole inventory
+2490.8%
407 lb → 10.5 thousand lb, every facility that filed
Between the two reporting years, 3 facilities filed for the first time and 4 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Williamson, TX's total reported releases rose from 387 lb in 2022 to 10.5 thousand lb in 2023, based on EPA TRI filings.
- Williamson, TX's off-site transfers rose from 3 lb in 2022 to 9.3 thousand lb in 2023, based on EPA TRI filings.
- Williamson, TX's air releases rose from 376 lb in 2022 to 1.2 thousand lb in 2023, based on EPA TRI filings.
- Williamson, TX's water releases rose from 8 lb in 2022 to 22 lb in 2023, based on EPA TRI filings.
Water Systems (30)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CITY OF GEORGETOWN | 191,639 | 0 |
| CITY OF ROUND ROCK | 130,662 | 0 |
| CITY OF CEDAR PARK | 86,939 | 0 |
| MANVILLE WSC | 39,648 | 8 |
| JONAH WATER SUD | 29,861 | 8 |
| CITY OF HUTTO | 29,580 | 2 |
| CITY OF TAYLOR | 20,622 | 1 |
| BRUSHY CREEK MUD | 18,314 | 0 |
| NORTH AUSTIN MUD 1 | 11,133 | 0 |
| JARRELL SCHWERTNER WSC | 9,681 | 0 |
| CITY OF LIBERTY HILL | 8,777 | 8 |
| WILLIAMSON TRAVIS COUNTY MUD 1 | 5,793 | 0 |
| FERN BLUFF MUD | 5,682 | 0 |
| CITY OF JARRELL | 3,450 | 0 |
| HEADWATERS AT BARTON CREEK | 2,315 | 0 |
| CITY OF GRANGER | 1,914 | 0 |
| BLESSING MOBILE HOME PARK | 1,518 | 1 |
| TRAVIS COUNTY MUD 18 | 1,491 | 0 |
| DURHAM PARK WSC | 1,251 | 0 |
| CITY OF FLORENCE | 1,136 | 6 |
| CITY OF THRALL | 975 | 6 |
| WALSH RANCH MUD | 714 | 0 |
| BARTON CREEK WSC | 633 | 1 |
| ROUND ROCK RANCH PUD UTILITY COMPANY | 285 | 0 |
| HIDDEN SHORES | 222 | 0 |
| NAMELESS HOLLOW CONDOMINIUMS | 210 | 5 |
| PATRIOT RV PARK BURNET | 90 | 1 |
| LIBERTY GREENLINE | 46 | 0 |
| PLAZA PARK ESTATES MHP | 20 | 0 |
| BRUSHY CREEK REGIONAL UTILITY AUTHORITY | 0 | 0 |
TRI Facilities (25)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Contemporary Products of Texas Inc | 377.7K lbs |
| 2 | Durcon Inc | 10.3K lbs |
| 3 | Valero Taylor Terminal | 4.3K lbs |
| 4 | Exfluor Research | 2.2K lbs |
| 5 | Seward Plant | 711 lbs |
| 6 | Nov M/d Totco Cedar Park | 128 lbs |
| 7 | Teco-Westinghouse Motor Co | 72 lbs |
| 8 | Airborn Inc. | 29 lbs |
| 9 | Gemini - Taylor | 19 lbs |
| 10 | Cargill Meat Solutions Corp | 13 lbs |
| 11 | Tec/solomon Corp Alliance | 11 lbs |
| 12 | Custom Crete - Leander | 4 lbs |
| 13 | Asphalt Inc Ronald Reagan Plant | 4 lbs |
| 14 | Florence Hmp | 3 lbs |
| 15 | Icu Medical Inc | 2 lbs |
| 16 | Txi-Georgetown Ready Mix | 0 lbs |
| 17 | Lone Star Concrete Chandler Plant | 0 lbs |
| 18 | Txi-Leander Ready Mix | 0 lbs |
| 19 | Centex Materials - Georgetown Rmx | 0 lbs |
| 20 | Fluoromed Products L.P. | 0 lbs |
| 21 | Ronald Reagan Cbp | 0 lbs |
| 22 | Jarrell Plant | 0 lbs |
| 23 | Mm Taylor Ready Mix | 0 lbs |
| 24 | Cerilliant Corp | 0 lbs |
| 25 | Benuvia | 0 lbs |
Cities in Williamson (12)
Frequently Asked Questions
What is the environmental risk level in Williamson, Texas? ▼
Are there Superfund sites in Williamson? ▼
How many toxic release facilities are in Williamson? ▼
What is the air quality in Williamson? ▼
Is the drinking water safe in Williamson? ▼
What environmental agencies cover Williamson? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.