Okla Ordnance Works Authority, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 2.7 ppb (monitoring period 2022-2024). 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.
Who runs the water here
Okla Ordnance Works Authority serves about 4,000 people through 113 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by the state and draws surface water, in Mayes County, Oklahoma. EPA system ID: OK1021602; phone on file: 918-825-3500. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 7.4 ppb from 10.1 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Okla Ordnance Works Authority is 10.1 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.7 ppb |
| 2021 | 10.1 ppb over 10 |
| 2018 | 6 ppb |
How Okla Ordnance Works 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. Okla Ordnance Works Authority's 2.7 ppb sits at the 82nd percentile in Oklahoma and the 79th nationally (higher means more lead).
Neighbouring systems
19 other systems share Mayes County; 0 of them have a higher latest lead result than Okla Ordnance Works Authority. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pryor | 8,784 | 0 (not detected) |
| Mayes Co Rwd # 2 | 6,280 | 0 (not detected) |
| Mayes Co Rwd #4 | 4,183 | 0 (not detected) |
| Mayes Co Rwd # 6 | 3,750 | 0 (not detected) |
| Mayes Co Rwd # 5 | 3,360 | 1.1 ppb |
| Mayes Co Rwd # 9 | 2,578 | 1.7 ppb |
| Mayes Co Rwd # 3 | 2,400 | 0 (not detected) |
| Chouteau | 2,100 | 0 (not detected) |
| Locust Grove Pwa | 1,600 | 0 (not detected) |
| Salina Pwa | 1,422 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Pryor, 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 Okla Ordnance Works 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. Systems that went over once often dip back under; here is what that means.