Capstone Subdivision, TX
Exceeded the action level in the past
Latest 90th-percentile lead: 7.93 ppb (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 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.
Capstone Subdivision at a glance
Capstone Subdivision serves about 81 people through 27 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Burnet County, Texas. EPA system ID: TX0270131; phone on file: 830-693-3615. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 2.61 ppb from 5.32 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Capstone Subdivision is 19.2 ppb across 9 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 7.93 ppb |
| 2022 | 5.32 ppb |
| 2021 | 6.67 ppb |
| 2020 | 8.7 ppb |
| 2020 | 12 ppb over 10 |
| 2019 | 19.2 ppb over 15 |
| 2018 | 7.55 ppb |
| 2017 | 10 ppb |
| 2016 | 10 ppb |
How Capstone Subdivision 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. Capstone Subdivision's 7.93 ppb sits at the 99th percentile in Texas and the 96th nationally (higher means more lead).
Other water systems in Burnet County
31 other systems share Burnet County; 2 of them have a higher latest lead result than Capstone Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Marble Falls | 8,059 | 1.84 ppb |
| City Of Burnet | 7,011 | 1.93 ppb |
| City Of Granite Shoals | 6,795 | 1.43 ppb |
| City Of Bertram | 3,636 | 1.21 ppb |
| City Of Meadowlakes | 2,480 | 3.83 ppb |
| City Of Cottonwood Shores | 2,157 | 1.86 ppb |
| Spicewood Beach | 1,452 | 4.06 ppb |
| City Of Highland Haven Water System | 734 | 2.08 ppb |
| City Of Granite Shoals Sherwood Iii | 675 | 5.87 ppb |
| Ridge Harbor | 573 | 2.13 ppb |
Next steps for Marble Falls, TX
Test your own tap with a certified lab first-draw sample; Marble Falls, 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 Capstone Subdivision 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. More in what a past exceedance means today.