Sand Flat Wsc, TX
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Sand Flat Wsc at a glance
Sand Flat Wsc serves about 4,569 people through 1,523 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Smith County, Texas. EPA system ID: TX2120020; phone on file: 903-526-5243. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sand Flat Wsc is 1.41 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2016 | 1.41 ppb |
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. Sand Flat Wsc's reported as 0 (not detected) sits at the 42nd percentile in Texas and the 34th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
35 other systems share Smith County; 10 of them have a higher latest lead result than Sand Flat Wsc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Tyler | 107,000 | 0 (not detected) |
| Southern Utilities | 69,735 | 1.57 ppb |
| Lindale Rural Wsc | 14,781 | 0 (not detected) |
| City Of Whitehouse | 9,571 | 0 (not detected) |
| Walnut Grove Wsc | 8,775 | 0 (not detected) |
| City Of Lindale | 6,313 | 0 (not detected) |
| Dean Wsc | 5,907 | 0 (not detected) |
| Jackson Wsc | 5,862 | 0 (not detected) |
| City Of Bullard | 4,500 | 0 (not detected) |
| Crystal Systems | 3,915 | 0 (not detected) |
What to do in your house
Look up your address in Sand Flat Wsc's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Sand Flat Wsc whether it covers that cost before hiring anyone - many utilities now do.
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. A zero today does not rule out a jump later - the rules are tightening in 2027.