Llano Grande Lake Park East, TX
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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 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.
About Llano Grande Lake Park East
Llano Grande Lake Park East serves about 1,300 people through 701 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws surface water, in Hidalgo County, Texas. EPA system ID: TX1080034; phone on file: 956-565-2638. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Llano Grande Lake Park East's lead record
That is down 3.06 ppb from 3.06 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Llano Grande Lake Park East is 13.6 ppb across 10 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 3.06 ppb |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 5.49 ppb |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 6.09 ppb |
| 2017 | 13.6 ppb over 10 |
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. Llano Grande Lake Park East's reported as 0 (not detected) sits at the 29th percentile in Texas and the 28th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
23 other systems share Hidalgo County; 14 of them have a higher latest lead result than Llano Grande Lake Park East. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| North Alamo Wsc | 171,195 | 0.32 ppb |
| Mcallen Public Utility | 145,050 | 2.3 ppb |
| City Of Edinburg | 85,224 | 0 (not detected) |
| City Of Pharr | 79,715 | 1.09 ppb |
| City Of Mission | 77,058 | 1.83 ppb |
| Sharyland Wsc | 68,562 | 1 ppb |
| Agua Sud | 53,796 | 1 ppb |
| City Of Weslaco | 40,033 | 1.5 ppb |
| City Of San Juan | 30,000 | 0 (not detected) |
| City Of Alamo | 21,065 | 1 ppb |
Next steps for Mercedes, TX
Look up your address in Llano Grande Lake Park East'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 Llano Grande Lake Park East whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1660 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. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.