River Oaks Ranch, 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.
About River Oaks Ranch
River Oaks Ranch serves about 336 people through 113 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Hays County, Texas. EPA system ID: TX1050099; phone on file: 737-376-2534. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for River Oaks Ranch is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
How River Oaks Ranch compares
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. River Oaks Ranch's reported as 0 (not detected) sits at the 17th 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.
Neighbouring systems
49 other systems share Hays County; 38 of them have a higher latest lead result than River Oaks Ranch. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of San Marcos | 72,970 | 1.63 ppb |
| City Of Kyle | 52,000 | 1.91 ppb |
| Texas State University - San Marcos | 43,552 | 1.3 ppb |
| Goforth Sud | 34,893 | 0 (not detected) |
| County Line Sud | 19,609 | 0 (not detected) |
| City Of Buda | 13,830 | 1.46 ppb |
| Dripping Springs Wsc | 8,037 | 1.89 ppb |
| Plum Creek | 7,065 | 1.24 ppb |
| Wimberley Wsc | 5,334 | 2.08 ppb |
| Hays County Wcid 2 | 3,381 | 2.88 ppb |
Next steps for Austin, TX
Look up your address in River Oaks Ranch'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 River Oaks Ranch 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. The lead result guide covers how utilities pick the homes they sample. A zero today does not rule out a jump later - the rules are tightening in 2027.