Hwy 7 East Water Assn, OK
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 Hwy 7 East Water Assn
Hwy 7 East Water Assn serves about 50 people through 25 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Comanche County, Oklahoma. EPA system ID: OK3001669; phone on file: 580-355-7752. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hwy 7 East Water Assn is 2.04 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0.78 ppb |
| 2021 | 0.5 ppb |
| 2020 | 0 (not detected) |
| 2019 | 2.04 ppb |
| 2018 | 0 (not detected) |
Against other Oklahoma systems
Of the 870 Oklahoma systems with a lead result, the median latest reading is 0.81 ppb; 6 are over 15 ppb right now and 66 have gone over at some point. Hwy 7 East Water Assn's reported as 0 (not detected) sits at the 2nd percentile in Oklahoma and the 4th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Comanche County
22 other systems share Comanche County; 17 of them have a higher latest lead result than Hwy 7 East Water Assn. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lawton | 92,757 | 1.6 ppb |
| Fort Sill Hqusafacfs | 23,000 | 1.16 ppb |
| Elgin Pwa | 3,300 | 0 (not detected) |
| Comanche Co Rwd #4 | 3,000 | 1.53 ppb |
| Comanche Co Rwd #1 | 2,800 | 0 (not detected) |
| Cache | 2,371 | 0 (not detected) |
| Comanche Co Rwd #3 | 2,325 | 3.33 ppb |
| Comanche Co Rwd #2 | 1,840 | 1.12 ppb |
| Geronimo | 1,200 | 0 (not detected) |
| Fletcher | 1,022 | 0 (not detected) |
Next steps for Lawton, OK
Look up your address in Hwy 7 East Water Assn'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 Hwy 7 East Water Assn 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. A zero today does not rule out a jump later - the rules are tightening in 2027.