Magnolia-Shenandoah Estates, MO
Exceeded the action level in the past
Latest 90th-percentile lead: 0.41 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Magnolia-Shenandoah Estates serves about 396 people through 132 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Lafayette Parish County, Missouri. EPA system ID: LA1055155; phone on file: 314-464-4790. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Magnolia-Shenandoah Estates is 46 ppb across 6 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.41 ppb |
| 2025 | 0 (not detected) |
| 2024 | 46 ppb over 15 |
| 2024 | 38 ppb over 15 |
| 2021 | 0 (not detected) |
| 2018 | 1 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. Magnolia-Shenandoah Estates's 0.41 ppb sits at the 40th percentile in Missouri and the 42nd nationally (higher means more lead).
Nearby utilities
22 other systems share Lafayette Parish County; 5 of them have a higher latest lead result than Magnolia-Shenandoah Estates. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Magnolia-Le Triomphe Subdivision | 1,278 | 0.79 ppb |
| Magnolia-Jackson Square | 825 | 0 (not detected) |
| Magnolia-Windy Meadows | 549 | 1 ppb |
| Magnolia-Garden Heights Subdivision Ws | 483 | 0 (not detected) |
| Magnolia-Markridge Park Subdivision | 468 | 0 (not detected) |
| Magnolia-Beau Parterre | 462 | 0 (not detected) |
| Magnolia-Ossun Heights | 393 | 0 (not detected) |
| Magnolia-Carencro Village | 315 | 0 (not detected) |
| Magnolia-Coach House Manor | 315 | 3 ppb |
| Magnolia-Belleville Subdivision | 282 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; St. Louis, 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 Magnolia-Shenandoah Estates whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 3700 ppb (copper action level 1,300 ppb).
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. Why sampled homes are the worst-case ones is in the guide to reading the number. Why an old exceedance still matters: over the limit before, under it now.