Chelsea Economic Dev. Auth., OK
Lead detected, under the action levels
Latest 90th-percentile lead: 4.3 ppb (monitoring period 2023-2025). 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.
Chelsea Economic Dev. Auth. at a glance
Chelsea Economic Dev. Auth. serves about 1,964 people through 1,117 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 Rogers County, Oklahoma. EPA system ID: OK1021504; phone on file: 918-789-2558. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Chelsea Economic Dev. Auth.'s lead record
That is up 4.3 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Chelsea Economic Dev. Auth. is 4.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.3 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 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. Chelsea Economic Dev. Auth.'s 4.3 ppb sits at the 90th percentile in Oklahoma and the 89th nationally (higher means more lead).
Nearby utilities
14 other systems share Rogers County; 0 of them have a higher latest lead result than Chelsea Economic Dev. Auth.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Claremore | 15,873 | 0 (not detected) |
| Rogers Co Rwd # 5 | 11,782 | 3 ppb |
| Rogers Co Rwd # 3 Cot Sta | 10,750 | 0 (not detected) |
| Rogers Co Rwd # 3 Lake Plant | 10,470 | 1.5 ppb |
| Rogers Co Rwd # 4 | 7,725 | 0 (not detected) |
| Rogers Co Rwd # 8 | 3,375 | 1 ppb |
| Rogers Co Rwd # 7 | 3,040 | 1.2 ppb |
| Rogers Co Rwd # 2 | 2,750 | 0 (not detected) |
| Catoosa | 2,668 | 0.22 ppb |
| Inola Water Works Inc | 1,589 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Chelsea, 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 Chelsea Economic Dev. Auth. 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. Size matters more than most people expect: small vs large water systems.