Jefferson City W&S Comm, TN
Lead detected, under the action levels
Latest 90th-percentile lead: 1.7 ppb (monitoring period 2026-2028). 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.
Jefferson City W&S Comm at a glance
Jefferson City W&S Comm serves about 9,764 people through 3,741 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 surface water, in Jefferson County, Tennessee. EPA system ID: TN0000328; phone on file: 865-475-6617. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2025 (1.6 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Jefferson City W&S Comm is 9.5 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 1.7 ppb |
| 2025 | 1.6 ppb |
| 2025 | 9.5 ppb |
| 2024 | 1.7 ppb |
| 2024 | 4.8 ppb |
| 2022 | 1 ppb |
| 2019 | 2.57 ppb |
| 2016 | 5.5 ppb |
Where this result ranks
Of the 453 Tennessee systems with a lead result, the median latest reading is 1 ppb; 0 are over 15 ppb right now and 10 have gone over at some point. Jefferson City W&S Comm's 1.7 ppb sits at the 85th percentile in Tennessee and the 66th nationally (higher means more lead).
Other water systems in Jefferson County
4 other systems share Jefferson County; 3 of them have a higher latest lead result than Jefferson City W&S Comm. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Shady Grove Utility District | 27,672 | 2.53 ppb |
| Dandridge Water Mgmt Facility | 9,931 | 1 ppb |
| New Market Utility District | 5,703 | 2.86 ppb |
| White Pine Water System | 4,171 | 5.21 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Jefferson City, TN 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 City W&S Comm 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. The action level is dropping - the 10 ppb rule from 2027.