Humboldt Utilities-Water Dept, TN
Lead detected, under the action levels
Latest 90th-percentile lead: 0.9 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.
Who runs the water here
Humboldt Utilities-Water Dept serves about 9,908 people through 4,044 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 Gibson County, Tennessee. EPA system ID: TN0000314; phone on file: 731-784-9212. They can tell you what your service line is made of and whether they pay to replace it.
Humboldt Utilities-Water Dept's lead record
That is down 2.9 ppb from 3.8 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Humboldt Utilities-Water Dept is 3.8 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0.9 ppb |
| 2025 | 3.8 ppb |
| 2022 | 0.7 ppb |
| 2019 | 1.1 ppb |
| 2016 | 1 ppb |
How Humboldt Utilities-Water Dept compares
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. Humboldt Utilities-Water Dept's 0.9 ppb sits at the 23rd percentile in Tennessee and the 49th nationally (higher means more lead).
Neighbouring systems
12 other systems share Gibson County; 5 of them have a higher latest lead result than Humboldt Utilities-Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Milan Water Dept | 10,932 | 4.1 ppb |
| Trenton Water System | 5,155 | 0.5 ppb |
| Gibson Co Muni Water Dist #4 | 3,386 | 0.7 ppb |
| Gibson Co Muni Water Dist #5 | 2,864 | 0.4 ppb |
| Dyer Water Dept | 2,783 | 1.4 ppb |
| Gibson Co Muni Water Dist #1 | 2,433 | 0.3 ppb |
| Gibson Co Muni Water Dist #3 | 1,465 | 0.7 ppb |
| Rutherford Water Works | 1,407 | 2.3 ppb |
| Bradford Water System | 1,276 | 0.3 ppb |
| Gibson Water Department | 466 | 0.65 ppb |
Next steps for Humboldt, TN
Test your own tap with a certified lab first-draw sample; Humboldt, 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 Humboldt Utilities-Water Dept 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.