Mo American Jaxson, MO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Mo American Jaxson
Mo American Jaxson serves about 535 people through 264 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in St. Charles County, Missouri. EPA system ID: MO6031461; phone on file: 636-263-7370. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Mo American Jaxson's lead record
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mo American Jaxson is 7 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 7 ppb |
| 2019 | 7 ppb |
| 2016 | 5 ppb |
| 2016 | 5 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 Jaxson's reported as 0 (not detected) sits at the 24th percentile in Missouri and the 23rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in St. Charles County
17 other systems share St. Charles County; 8 of them have a higher latest lead result than Mo American Jaxson. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| St Charles County Pwsd 2 | 100,587 | 2.28 ppb |
| St Charles Pws | 78,961 | 0 (not detected) |
| St Peters Pws | 52,575 | 0 (not detected) |
| Wentzville Pws | 41,784 | 4.77 ppb |
| Ofallon Pws | 32,515 | 1.48 ppb |
| St Paul Pws | 1,700 | 0 (not detected) |
| St Charles Co Pwsd 2 Augusta | 881 | 1.47 ppb |
| St Charles Pwsd 2 Foristell | 550 | 2.32 ppb |
| Ecm Water & Sewer Authority - Flint Hill | 469 | 0 (not detected) |
| Portage Des Sioux Pws | 345 | 2.6 ppb |
What to do in your house
Look up your address in Mo American Jaxson's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Mo American Jaxson 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. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.