Calvert City Municipal Water Department, KY
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2023-2025). 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
Calvert City Municipal Water Department serves about 4,381 people through 1,475 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 Marshall County, Kentucky. EPA system ID: KY0790056; phone on file: 270-395-7138. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Calvert City Municipal Water Department is 3 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2022 | 2 ppb |
| 2019 | 2 ppb |
| 2019 | 2 ppb |
| 2016 | 0 (not detected) |
How Calvert City Municipal Water Department compares
Of the 367 Kentucky systems with a lead result, the median latest reading is 0 ppb; 0 are over 15 ppb right now and 4 have gone over at some point. Calvert City Municipal Water Department's 3 ppb sits at the 82nd percentile in Kentucky and the 82nd nationally (higher means more lead).
Neighbouring systems
4 other systems share Marshall County; 1 of them has a higher latest lead result than Calvert City Municipal Water Department. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| North Marshall Water District #1 | 16,276 | 0 (not detected) |
| Benton Water & Sewer | 7,981 | 0 (not detected) |
| Jonathan Creek Water District | 7,182 | 4 ppb |
| Hardin Water Department | 1,606 | 0 (not detected) |
Next steps for Calvert City, KY
Test your own tap with a certified lab first-draw sample; Calvert City, KY 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 Calvert City Municipal Water Department 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.