Osu Water Plant, OK
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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
Osu Water Plant serves about 13,000 people through 413 service connections, which makes it a large system under EPA's size classes. It is owned by the state and draws surface water, in Payne County, Oklahoma. EPA system ID: OK1020910; phone on file: 405-744-7034. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Osu Water Plant is 1 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 1 ppb |
How Osu Water Plant compares
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. Osu Water Plant's reported as 0 (not detected) sits at the 42nd percentile in Oklahoma and the 38th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Payne County
11 other systems share Payne County; 10 of them have a higher latest lead result than Osu Water Plant. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Stillwater Utilities Authority | 53,000 | 2.6 ppb |
| Cushing | 8,371 | 1.3 ppb |
| Payne Co Rw Corp #3 | 3,000 | 2.9 ppb |
| Perkins | 2,572 | 3.9 ppb |
| 51 East Water | 2,500 | 3.2 ppb |
| Payne Co Rwd #3 | 1,400 | 2 ppb |
| Yale | 1,227 | 6.7 ppb |
| Payne Co Rwd #4 | 820 | 1 ppb |
| Glencoe | 478 | 3.9 ppb |
| Ripley Pwa | 376 | 1.1 ppb |
Your move
Look up your address in Osu Water Plant'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 Osu Water Plant 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. Small systems behave differently: why small systems go over more often.