Onaga, City Of, KS
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
Onaga, City Of serves about 671 people through 380 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 groundwater, in Pottawatomie County, Kansas. EPA system ID: KS2014905; phone on file: 785-889-4456. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Onaga, City Of is 1.6 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 | 1.6 ppb |
| 2017 | 0 (not detected) |
How Onaga, City Of compares
Of the 832 Kansas systems with a lead result, the median latest reading is 1.4 ppb; 2 are over 15 ppb right now and 35 have gone over at some point. Onaga, City Of's reported as 0 (not detected) sits at the 17th percentile in Kansas and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
14 other systems share Pottawatomie County; 8 of them have a higher latest lead result than Onaga, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pottawatomie Co Rwd 1 | 7,535 | 0 (not detected) |
| Wamego, City Of | 4,860 | 0.17 ppb |
| St Marys, City Of | 2,781 | 1.79 ppb |
| Pottawatomie Co Rwd 3 | 1,455 | 0 (not detected) |
| Pottawatomie Co Rwd 4 | 1,125 | 0 (not detected) |
| St George, City Of | 998 | 0 (not detected) |
| Pottawatomie Co Rwd 2 | 865 | 2.2 ppb |
| Timber Creek East Water District | 850 | 1.4 ppb |
| Westmoreland, City Of | 716 | 0 (not detected) |
| Olsburg, City Of | 221 | 3.4 ppb |
Next steps for Onaga, KS
Look up your address in Onaga, City Of'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 Onaga, City Of 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. A zero today does not rule out a jump later - the rules are tightening in 2027.