Greenbriar Estates, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 0.99 ppb (monitoring period 2024-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Greenbriar Estates serves about 129 people through 43 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Chambers County, Texas. EPA system ID: TX0360111; phone on file: 737-376-2534. They can tell you what your service line is made of and whether they pay to replace it.
Greenbriar Estates's lead record
Against the period ending 2023 (0.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Greenbriar Estates is 0.99 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.99 ppb |
| 2023 | 0.3 ppb |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
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. Greenbriar Estates's 0.99 ppb sits at the 63rd percentile in Texas and the 50th nationally (higher means more lead).
Other water systems in Chambers County
28 other systems share Chambers County; 9 of them have a higher latest lead result than Greenbriar Estates. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Mont Belvieu | 12,864 | 2.5 ppb |
| Tbcd Winnie Stowell | 8,397 | 2.61 ppb |
| Gray Utility Service | 8,004 | 0 (not detected) |
| Tbcd West Treatment Plant | 7,695 | 3.77 ppb |
| Chambers County Mud 1 | 2,500 | 1.21 ppb |
| City Of Anahuac | 2,296 | 0 (not detected) |
| Plantation On Cotton Bayou | 1,557 | 0 (not detected) |
| Coles Crossing | 1,521 | 0 (not detected) |
| Barrow Ranch | 774 | 0.81 ppb |
| Tower Terrace | 768 | 0 (not detected) |
Next steps for Austin, TX
Test your own tap with a certified lab first-draw sample; Austin, 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 Greenbriar Estates 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. The action level is dropping - the 10 ppb rule from 2027.