Noble Utilities Authority, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 1.3 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.
About Noble Utilities Authority
Noble Utilities Authority serves about 5,750 people through 2,920 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Cleveland County, Oklahoma. EPA system ID: OK2001411; phone on file: 405-872-9251. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is up 1.3 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Noble Utilities Authority is 1.3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.3 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 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. Noble Utilities Authority's 1.3 ppb sits at the 61st percentile in Oklahoma and the 61st nationally (higher means more lead).
Neighbouring systems
11 other systems share Cleveland County; 4 of them have a higher latest lead result than Noble Utilities Authority. 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 |
| Joseph Harp Corr Inst | 3,000 | 0 (not detected) |
| 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) |
Next steps for Noble, OK
Test your own tap with a certified lab first-draw sample; Noble, 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 Noble Utilities 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. Size matters more than most people expect: small vs large water systems.