Jefferson Co Rwd 10, KS
Lead detected, under the action levels
Latest 90th-percentile lead: 5 ppb (monitoring period 2025-2025). 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.
Who runs the water here
Jefferson Co Rwd 10 serves about 300 people through 122 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: KS2008709; phone on file: 785-876-2639. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 1.9 ppb from 3.1 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Jefferson Co Rwd 10 is 5 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 5 ppb |
| 2024 | 3.1 ppb |
| 2022 | 1.4 ppb |
| 2022 | 1.2 ppb |
| 2022 | 1.9 ppb |
| 2022 | 0 (not detected) |
| 2020 | 1.2 ppb |
| 2019 | 3.5 ppb |
| 2017 | 3.5 ppb |
| 2016 | 3.5 ppb |
Where this result ranks
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 10's 5 ppb sits at the 92nd percentile in Kansas and the 91st nationally (higher means more lead).
Neighbouring systems
17 other systems share Jefferson County; 1 of them has a higher latest lead result than Jefferson Co Rwd 10. 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 |
Your move
Test your own tap with a certified lab first-draw sample; Ozawkie, KS 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 Jefferson Co Rwd 10 whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1450 ppb (copper action level 1,300 ppb).
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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.