Fort Gibson, OK
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). 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.
Who runs the water here
Fort Gibson serves about 4,700 people through 1,774 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 surface water, in Muskogee County, Oklahoma. EPA system ID: OK1021622; phone on file: 918-478-3551. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 5.6 ppb from 5.6 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Fort Gibson is 5.6 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 5.6 ppb |
| 2019 | 0 (not detected) |
| 2016 | 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. Fort Gibson's reported as 0 (not detected) sits at the 39th percentile in Oklahoma and the 34th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
17 other systems share Muskogee County; 6 of them have a higher latest lead result than Fort Gibson. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Muskogee Municipal Authority | 38,310 | 5.4 ppb |
| Porum Pwa | 5,000 | 0 (not detected) |
| Muskogee Co. Rwd #5 | 4,135 | 2.3 ppb |
| Muskogee Co. Rwd #6 | 2,550 | 0 (not detected) |
| Muskogee Co. Rwd #1 (Oktaha) | 2,280 | 0 (not detected) |
| Warner | 2,020 | 0 (not detected) |
| Haskell Pwa-Wells | 1,765 | 2.6 ppb |
| Muskogee Co. Rwd #7 | 1,710 | 0 (not detected) |
| Muskogee Co. Rwd #3 | 1,300 | 1.7 ppb |
| Braggs Water Works | 1,030 | 2.6 ppb |
Your move
Look up your address in Fort Gibson'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 Fort Gibson 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.