Jefferson Co Rwd 11, KS
Above the federal action level
Latest 90th-percentile lead: 48.1 ppb (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. In the most recent monitoring period, more than 10% of the sampled homes measured above 15 ppb. Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking now, and test your own tap.
Jefferson Co Rwd 11 at a glance
Jefferson Co Rwd 11 serves about 483 people through 214 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 Jefferson County, Kansas. EPA system ID: KS2008712; phone on file: 785-484-0489. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 48.1 ppb from 0 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Jefferson Co Rwd 11 is 48.1 ppb across 4 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 48.1 ppb over 15 |
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 3.1 ppb |
Against other Kansas systems
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. Jefferson Co Rwd 11's 48.1 ppb sits at the 100th percentile in Kansas and the 100th nationally (higher means more lead).
Other water systems in Jefferson County
17 other systems share Jefferson County; 0 of them have a higher latest lead result than Jefferson Co Rwd 11. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Jefferson Co Rwd 12 | 3,635 | 3.4 ppb |
| Jefferson Co Rwd 3 | 2,435 | 2.22 ppb |
| Jefferson Co Rwd 1 | 2,343 | 1.7 ppb |
| Jefferson Co Rwd 13 | 2,115 | 0.1 ppb |
| Jefferson Co Rwd 7 | 1,180 | 0 (not detected) |
| Valley Falls, City Of | 1,086 | 4.1 ppb |
| Oskaloosa, City Of | 1,086 | 0 (not detected) |
| Mclouth, City Of | 858 | 0 (not detected) |
| Perry, City Of | 858 | 3.52 ppb |
| Jefferson Co Rwd 2 | 642 | 2.9 ppb |
What to do in your house
Use a filter certified to NSF/ANSI 53 for lead on the tap you drink and cook from, now, before you test. Then test your own tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Jefferson Co Rwd 11 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. Systems that went over once often dip back under; here is what that means.