Slc Wsc, TX
Exceeded the action level in the past
Latest 90th-percentile lead: 8 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Slc Wsc serves about 1,749 people through 632 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Limestone County, Texas. EPA system ID: TX1470031; phone on file: 254-729-3415. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 2 ppb from 6 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Slc Wsc is 22 ppb across 12 monitoring periods, 3 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 8 ppb |
| 2025 | 6 ppb |
| 2025 | 7.1 ppb |
| 2024 | 9.6 ppb |
| 2024 | 14.7 ppb over 10 |
| 2023 | 0 (not detected) |
| 2023 | 5.6 ppb |
| 2022 | 8 ppb |
| 2022 | 9.1 ppb |
| 2021 | 19 ppb over 15 |
| 2019 | 20 ppb over 15 |
| 2016 | 22 ppb over 15 |
Where this result ranks
Of the 4,447 Texas systems with a lead result, the median latest reading is 0.28 ppb; 15 are over 15 ppb right now and 202 have gone over at some point. Slc Wsc's 8 ppb sits at the 99th percentile in Texas and the 96th nationally (higher means more lead).
Nearby utilities
17 other systems share Limestone County; 0 of them have a higher latest lead result than Slc Wsc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Mexia | 7,459 | 2.07 ppb |
| City Of Groesbeck | 4,250 | 0 (not detected) |
| Point Enterprise Wsc | 2,388 | 0 (not detected) |
| Prairie Hill Wsc | 2,150 | 0 (not detected) |
| White Rock Wsc 2 Forest Glade | 1,968 | 0 (not detected) |
| City Of Coolidge | 786 | 0 (not detected) |
| Bistone Municipal Water Supply | 768 | 0 (not detected) |
| Shiloh Wsc | 615 | 0 (not detected) |
| White Rock Wsc 3 West Lake Mexia | 602 | 0 (not detected) |
| City Of Thornton Water System | 530 | 3.06 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Groesbeck, TX may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Slc Wsc whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 2310 ppb (copper action level 1,300 ppb).
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. What a 90th-percentile result does and does not tell you: how to read a lead result. Why an old exceedance still matters: over the limit before, under it now.