Joseph Harp Corr Inst, OK
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Joseph Harp Corr Inst serves about 3,000 people through 34 service connections, which makes it a small system under EPA's size classes. It is owned by the state and draws groundwater, in Cleveland County, Oklahoma. EPA system ID: OK2001408; phone on file: 405-527-4847. 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 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Joseph Harp Corr Inst is 8.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2020 | 8.3 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. Joseph Harp Corr Inst's reported as 0 (not detected) sits at the 37th percentile in Oklahoma and the 33rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
11 other systems share Cleveland County; 5 of them have a higher latest lead result than Joseph Harp Corr Inst. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Norman Utilities Authority | 104,868 | 0 (not detected) |
| Moore Public Works Authority | 55,083 | 0 (not detected) |
| Oklahoma University | 34,000 | 1.6 ppb |
| Noble Utilities Authority | 5,750 | 1.3 ppb |
| Lexington | 2,086 | 6.5 ppb |
| Sooner Utilities - Sleepy Hollow | 438 | 6 ppb |
| Wildfire Estates Homeowners | 285 | 0 (not detected) |
| Stonetown Clearview Mhc | 170 | 0 (not detected) |
| Prairie Creek Village Mhp | 145 | 0 (not detected) |
| Cleveland Co Rw,S,G&Swmd #1 | 80 | 0 (not detected) |
What to do in your house
Look up your address in Joseph Harp Corr Inst's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Joseph Harp Corr Inst 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. Small systems behave differently: why small systems go over more often.