Avant Utilities Authority, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 1.8 ppb (monitoring period 2025-2025). 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.
About Avant Utilities Authority
Avant Utilities Authority serves about 361 people through 169 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Osage County, Oklahoma. EPA system ID: OK1021305; phone on file: 918-263-3205. 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 2024 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Avant Utilities Authority is 5.1 ppb across 13 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.8 ppb |
| 2024 | 2 ppb |
| 2023 | 1 ppb |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 5 ppb |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 5.1 ppb |
| 2016 | 0 (not detected) |
| 2016 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Avant Utilities Authority 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. Avant Utilities Authority's 1.8 ppb sits at the 70th percentile in Oklahoma and the 67th nationally (higher means more lead).
Neighbouring systems
26 other systems share Osage County; 9 of them have a higher latest lead result than Avant Utilities Authority. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Skiatook Pwa | 8,110 | 0 (not detected) |
| Osage Co Rwd #15 | 6,647 | 0 (not detected) |
| Pawhuska | 3,800 | 3.6 ppb |
| Hominy | 2,584 | 0.4 ppb |
| Mccord Rwd #3 | 1,800 | 2 ppb |
| Fairfax | 1,555 | 2.3 ppb |
| Osage Co Rwd #21 | 1,500 | 0 (not detected) |
| Barnsdall | 1,243 | 0 (not detected) |
| Osage Co Rwd # 1 | 930 | 5.3 ppb |
| Osage Co Rws & Swd #3 (Braden) | 700 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Avant, 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 Avant 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.