City Of Seminole, TX
Lead detected, under the action levels
Latest 90th-percentile lead: 2.34 ppb (monitoring period 2026-2028). 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
City Of Seminole serves about 7,386 people through 3,000 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Gaines County, Texas. EPA system ID: TX0830012; phone on file: 432-758-3621. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2026 (1.84 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for City Of Seminole is 5.28 ppb across 11 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 2.34 ppb |
| 2026 | 1.84 ppb |
| 2025 | 5.28 ppb |
| 2025 | 3.93 ppb |
| 2024 | 3.58 ppb |
| 2022 | 1.12 ppb |
| 2021 | 0.83 ppb |
| 2018 | 0 (not detected) |
| 2017 | 1.03 ppb |
| 2017 | 0.3 ppb |
| 2016 | 0.6 ppb |
How City Of Seminole 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. City Of Seminole's 2.34 ppb sits at the 86th percentile in Texas and the 76th nationally (higher means more lead).
Neighbouring systems
3 other systems share Gaines County; 1 of them has a higher latest lead result than City Of Seminole. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Seagraves | 2,417 | 0 (not detected) |
| Loop Wsc | 300 | 5.46 ppb |
| Texland Great Plains Water Supply | - | - |
What to do in your house
Test your own tap with a certified lab first-draw sample; Seminole, 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 Seminole 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. Systems that went over once often dip back under; here is what that means.