Mo American Jefferson City District, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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.
Mo American Jefferson City District at a glance
Mo American Jefferson City District serves about 30,075 people through 10,875 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws surface water, in Cole County, Missouri. EPA system ID: MO3010409; phone on file: 573-634-3801. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Mo American Jefferson City District's lead record
That is up 2 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Mo American Jefferson City District is 2 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 2 ppb |
| 2019 | 2 ppb |
| 2016 | 2 ppb |
| 2016 | 2 ppb |
Against other Missouri systems
Of the 1,674 Missouri systems with a lead result, the median latest reading is 1.04 ppb; 2 are over 15 ppb right now and 74 have gone over at some point. Mo American Jefferson City District's 2 ppb sits at the 71st percentile in Missouri and the 73rd nationally (higher means more lead).
Nearby utilities
11 other systems share Cole County; 5 of them have a higher latest lead result than Mo American Jefferson City District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cole County Pwsd 1 | 16,548 | 5.13 ppb |
| Cole County Pwsd 2 | 13,107 | 8.58 ppb |
| Cole County Pwsd 4 | 7,568 | 8.81 ppb |
| Cole County Pwsd 3 | 2,000 | 1.88 ppb |
| Mo American Wardsville | 1,506 | 2 ppb |
| Russellville Pws | 800 | 1.69 ppb |
| Cole County Pwsd 5 | 350 | 15.1 ppb |
| Centertown Pws | 278 | 0.59 ppb |
| Mo American Lake Carmel | 215 | 2 ppb |
| Eugene Pws | 125 | 0.78 ppb |
Next steps for Jefferson City, MO
Test your own tap with a certified lab first-draw sample; Jefferson City, MO 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 Mo American Jefferson City District 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.