Lago Vista Water System, 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.
Lago Vista Water System at a glance
Lago Vista Water System serves about 72 people through 24 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Val Verde County, Texas. EPA system ID: TX2330055; phone on file: 830-719-2799. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lago Vista Water System's lead record
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Lago Vista Water System is 65.3 ppb across 6 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2022 | 2.2 ppb |
| 2018 | 18 ppb over 15 |
| 2017 | 65.3 ppb over 15 |
Against other Texas systems
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. Lago Vista Water System's reported as 0 (not detected) sits at the 4th percentile in Texas and the 6th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
11 other systems share Val Verde County; 7 of them have a higher latest lead result than Lago Vista Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Del Rio Utilities Commission | 36,506 | 1.7 ppb |
| Laughlin Air Force Base | 4,010 | 6 ppb |
| Lake Ridge Water System | 1,300 | 1.32 ppb |
| Holiday Trav L Park | 660 | 0 (not detected) |
| American Camp Ground | 381 | 1.9 ppb |
| Del Grande Mobile Home Park | 288 | 1.2 ppb |
| Val Verde County Wcid Comstock | 175 | 0 (not detected) |
| San Pedro Canyon Subdivision - Upper | 150 | 1.68 ppb |
| Devils Shores Wsc | 97 | 0.4 ppb |
| Rough Canyon Condos | 89 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Del Rio, 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 Lago Vista Water System 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. Why an old exceedance still matters: over the limit before, under it now.