Tanglewood On Texoma, TX
Lead reported as not detected
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 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 Tanglewood On Texoma
Tanglewood On Texoma serves about 4,341 people through 1,515 service connections, which makes it a medium-sized system under EPA's size classes. It is privately owned and draws surface water, in Grayson County, Texas. EPA system ID: TX0910052; 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.
Tanglewood On Texoma's lead record
That is down 2.61 ppb from 2.61 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Tanglewood On Texoma is 3.5 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 2.61 ppb |
| 2022 | 3.5 ppb |
| 2019 | 2.2 ppb |
| 2016 | 2.5 ppb |
How Tanglewood On Texoma 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. Tanglewood On Texoma's reported as 0 (not detected) sits at the 41st percentile in Texas and the 34th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Grayson County
39 other systems share Grayson County; 17 of them have a higher latest lead result than Tanglewood On Texoma. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Sherman | 43,645 | 0 (not detected) |
| City Of Denison | 27,500 | 1.82 ppb |
| City Of Van Alstyne | 10,644 | 0.81 ppb |
| Two Way Sud | 6,804 | 0 (not detected) |
| South Grayson Sud | 6,750 | 7.49 ppb |
| City Of Howe | 4,548 | 0 (not detected) |
| Kentuckytown Wsc | 4,455 | 2.08 ppb |
| Luella Sud | 4,200 | 0 (not detected) |
| City Of Whitesboro | 4,192 | 0 (not detected) |
| Northwest Grayson County Wcid 1 | 3,615 | 0 (not detected) |
Next steps for Austin, TX
Look up your address in Tanglewood On Texoma'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 Tanglewood On Texoma whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 2410 ppb (copper action level 1,300 ppb).
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. Small systems behave differently: why small systems go over more often.