Magnolia-Windy Meadows, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2022-2024). 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
Magnolia-Windy Meadows serves about 549 people through 183 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Lafayette Parish County, Missouri. EPA system ID: LA1055169; phone on file: 314-464-4790. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2021 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Magnolia-Windy Meadows is 1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1 ppb |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
How Magnolia-Windy Meadows compares
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-Windy Meadows's 1 ppb sits at the 49th percentile in Missouri and the 53rd nationally (higher means more lead).
Other water systems in Lafayette Parish County
22 other systems share Lafayette Parish County; 1 of them has a higher latest lead result than Magnolia-Windy Meadows. 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-Garden Heights Subdivision Ws | 483 | 0 (not detected) |
| Magnolia-Markridge Park Subdivision | 468 | 0 (not detected) |
| Magnolia-Beau Parterre | 462 | 0 (not detected) |
| Magnolia-Shenandoah Estates | 396 | 0.41 ppb |
| 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) |
Next steps for St. Louis, MO
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-Windy Meadows 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.