Nicoma Park, OK
Exceeded the action level in the past
Latest 90th-percentile lead: 2.6 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Nicoma Park
Nicoma Park serves about 318 people through 68 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 groundwater, in Oklahoma County, Oklahoma. EPA system ID: OK8005579; phone on file: 405-769-5673. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Nicoma Park's lead record
That is down 29.6 ppb from 32.2 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Nicoma Park is 32.2 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.6 ppb |
| 2025 | 32.2 ppb over 15 |
| 2025 | 1 ppb |
| 2024 | 3.7 ppb |
| 2024 | 4.6 ppb |
| 2023 | 4.2 ppb |
How Nicoma Park 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. Nicoma Park's 2.6 ppb sits at the 80th percentile in Oklahoma and the 78th nationally (higher means more lead).
Neighbouring systems
35 other systems share Oklahoma County; 5 of them have a higher latest lead result than Nicoma Park. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Oklahoma City | 644,000 | 0 (not detected) |
| Edmond Pwa | 79,408 | 0 (not detected) |
| Midwest City | 55,935 | 1.2 ppb |
| Tinker Air Force Base | 24,645 | 0 (not detected) |
| Del City | 22,128 | 1.6 ppb |
| Bethany | 20,307 | 0 (not detected) |
| Deer Creek Rural Water Corp | 5,500 | 0 (not detected) |
| Harrah | 4,190 | 1.1 ppb |
| Nichols Hills | 4,020 | 0 (not detected) |
| Choctaw Ua | 3,926 | 11.4 ppb |
Next steps for Nicoma Park, OK
Test your own tap with a certified lab first-draw sample; Nicoma Park, 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 Nicoma Park 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. Why an old exceedance still matters: over the limit before, under it now.