City Of Tomball, TX
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 13.9 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
City Of Tomball at a glance
City Of Tomball serves about 17,532 people through 5,844 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Harris County, Texas. EPA system ID: TX1010026; phone on file: 281-351-5484. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 12.27 ppb from 1.63 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for City Of Tomball is 13.9 ppb across 5 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 13.9 ppb over 10 |
| 2023 | 1.63 ppb |
| 2020 | 0.62 ppb |
| 2017 | 1 ppb |
| 2016 | 1.6 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. City Of Tomball's 13.9 ppb sits at the 100th percentile in Texas and the 98th nationally (higher means more lead).
Neighbouring systems
690 other systems share Harris County; 2 of them have a higher latest lead result than City Of Tomball. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Houston | 2,970,543 | 5 ppb |
| City Of Pasadena | 152,000 | 3.72 ppb |
| Clear Lake City Water Authority | 89,702 | 0.88 ppb |
| City Of Baytown | 86,004 | 2.1 ppb |
| City Of Houston Ud 5 - Kingwood | 80,073 | 0.51 ppb |
| Harris County Mud 165 | 40,503 | 1.3 ppb |
| City Of La Porte | 36,569 | 2.35 ppb |
| City Of Deer Park | 34,495 | 0 (not detected) |
| Northwest Harris County Mud 5 | 25,425 | 0 (not detected) |
| City Of Katy | 25,253 | 2.7 ppb |
Next steps for Tomball, TX
Test your own tap with a certified lab first-draw sample; Tomball, 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 City Of Tomball 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. See what changes at 10 ppb in 2027.