Oak Hollow Subdivision, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 1.21 ppb (monitoring period 2022-2024). 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
Oak Hollow Subdivision serves about 78 people through 26 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Matagorda County, Texas. EPA system ID: TX1610031; phone on file: 512-990-4400. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2017 (0.59 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Oak Hollow Subdivision is 1.21 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.21 ppb |
| 2017 | 0.59 ppb |
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. Oak Hollow Subdivision's 1.21 ppb sits at the 69th percentile in Texas and the 59th nationally (higher means more lead).
Nearby utilities
24 other systems share Matagorda County; 5 of them have a higher latest lead result than Oak Hollow Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Bay City | 18,061 | 3.6 ppb |
| City Of Palacios | 4,700 | 0.9 ppb |
| Caney Creek Mud Of Matagorda County | 2,764 | 2.12 ppb |
| Matagorda Wsc | 1,746 | 2.5 ppb |
| Matagorda County Wcid 6 | 1,518 | 0 (not detected) |
| Markham Mud | 1,400 | 0 (not detected) |
| Matagorda County Wcid 5 | 1,128 | 0 (not detected) |
| Tres Palacios Oaks Subdivision | 774 | 1.03 ppb |
| Selkirk Wsc | 678 | 0 (not detected) |
| Wadsworth Wsc | 570 | 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 Oak Hollow 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.