Llano Grande Lake Park West, TX
Exceeded the action level in the past
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 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.
About Llano Grande Lake Park West
Llano Grande Lake Park West serves about 300 people through 439 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Hidalgo County, Texas. EPA system ID: TX1080236; 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.
Every lead result on file
That is down 15.6 ppb from 15.6 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Llano Grande Lake Park West is 28 ppb across 9 monitoring periods, 3 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 15.6 ppb over 15 |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 25.4 ppb over 15 |
| 2016 | 28 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. Llano Grande Lake Park West's reported as 0 (not detected) sits at the 16th percentile in Texas and the 19th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Hidalgo County
23 other systems share Hidalgo County; 14 of them have a higher latest lead result than Llano Grande Lake Park West. 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
Test your own tap with a certified lab first-draw sample; Mercedes, 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 Llano Grande Lake Park West whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 6280 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. Why sampled homes are the worst-case ones is in the guide to reading the number. More in what a past exceedance means today.