Mo American Smithton, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2024-2026). 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.
About Mo American Smithton
Mo American Smithton serves about 500 people through 239 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Pettis County, Missouri. EPA system ID: MO3010746; phone on file: 417-680-0314. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Mo American Smithton's lead record
Against the period ending 2025 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mo American Smithton is 2.74 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 1 ppb |
| 2023 | 1 ppb |
| 2022 | 1.5 ppb |
| 2020 | 1.5 ppb |
| 2020 | 1.5 ppb |
| 2019 | 2.74 ppb |
| 2017 | 2.74 ppb |
| 2017 | 2.74 ppb |
| 2016 | 2.38 ppb |
Where this result ranks
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 Smithton's 1 ppb sits at the 49th percentile in Missouri and the 53rd nationally (higher means more lead).
Nearby utilities
18 other systems share Pettis County; 10 of them have a higher latest lead result than Mo American Smithton. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sedalia Pws | 21,725 | 1.72 ppb |
| La Monte Pws | 1,120 | 5.51 ppb |
| Mo American Maplewood Subdivision | 1,008 | 2 ppb |
| Green Ridge Pws | 595 | 1.99 ppb |
| Southgate Subdivision | 216 | 14.8 ppb |
| Houstonia Pws | 198 | 2.53 ppb |
| Hughesville Pws | 158 | 5.5 ppb |
| Mo American Monsees Lake Estates | 155 | 12 ppb |
| Elm Hills Utility Operating Company Inc | 154 | 0 (not detected) |
| Southern Hills Water Co | 144 | 0 (not detected) |
Next steps for Joplin, MO
Test your own tap with a certified lab first-draw sample; Joplin, 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 Smithton 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.