Washington Co Rwd #5, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 3.2 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 Washington Co Rwd #5
Washington Co Rwd #5 serves about 900 people through 390 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Washington County, Oklahoma. EPA system ID: OK3007409; phone on file: 918-338-9004. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 9.4 ppb from 12.6 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Washington Co Rwd #5 is 12.6 ppb across 5 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.2 ppb |
| 2024 | 12.6 ppb over 10 |
| 2023 | 4.4 ppb |
| 2023 | 4.1 ppb |
| 2017 | 0 (not detected) |
Where this result ranks
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. Washington Co Rwd #5's 3.2 ppb sits at the 86th percentile in Oklahoma and the 84th nationally (higher means more lead).
Neighbouring systems
10 other systems share Washington County; 3 of them have a higher latest lead result than Washington Co Rwd #5. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bartlesville | 34,748 | 3.6 ppb |
| Dewey Public Works Authority | 3,490 | 2.6 ppb |
| Washington Co Rwd #2 | 2,250 | 1.8 ppb |
| Washington Co Rwd #1 | 1,375 | 3.8 ppb |
| Le Ann Water | 750 | 1.2 ppb |
| Copan Pwa | 733 | 5.6 ppb |
| Ramona Public Works Authority | 564 | 2.7 ppb |
| Ochelata Utility Authority | 494 | 0 (not detected) |
| Washington Co Rwd #7 | 258 | 1.3 ppb |
| Bar-Dew Water Assoc Inc | 130 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Ramona, 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 Washington Co Rwd #5 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. The action level is dropping - the 10 ppb rule from 2027.