Stillwater Utilities Authority, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 2.6 ppb (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. 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.
Stillwater Utilities Authority at a glance
Stillwater Utilities Authority serves about 53,000 people through 17,348 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 surface water, in Payne County, Oklahoma. EPA system ID: OK1021220; phone on file: 405-533-8452. They can tell you what your service line is made of and whether they pay to replace it.
Stillwater Utilities Authority's lead record
Against the period ending 2025 (2.1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Stillwater Utilities Authority is 3 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.6 ppb |
| 2025 | 2.1 ppb |
| 2024 | 2.1 ppb |
| 2023 | 3 ppb |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 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. Stillwater Utilities Authority's 2.6 ppb sits at the 81st percentile in Oklahoma and the 78th nationally (higher means more lead).
Neighbouring systems
11 other systems share Payne County; 5 of them have a higher latest lead result than Stillwater Utilities Authority. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Osu Water Plant | 13,000 | 0 (not detected) |
| 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 |
Next steps for Stillwater, OK
Test your own tap with a certified lab first-draw sample; Stillwater, OK 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 Stillwater Utilities Authority 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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.