Magnolia - Big Oaks, MO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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 Magnolia - Big Oaks
Magnolia - Big Oaks serves about 120 people through 40 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Caddo Parish County, Missouri. EPA system ID: LA1017081; 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 - Big Oaks is 1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 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 - Big Oaks's reported as 0 (not detected) sits at the 9th percentile in Missouri and the 11th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Caddo Parish County
11 other systems share Caddo Parish County; 1 of them has a higher latest lead result than Magnolia - Big Oaks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Magnolia - Eagle | 1,980 | 0 (not detected) |
| Magnolia-Wildwood South | 549 | 0 (not detected) |
| Magnolia-Dixie Garden | 510 | 1.3 ppb |
| Magnolia - Meadowwood Estates | 159 | 0 (not detected) |
| Magnolia - Barron Ridge Subdivision | 147 | 0 (not detected) |
| Magnolia - Colworth Place | 132 | 0 (not detected) |
| Magnolia - Linda Lane | 111 | 0 (not detected) |
| Magnolia-Jones Rolling Ridge | 111 | 0 (not detected) |
| Magnolia-Dixie Garden-Kings Hwy | 96 | 0 (not detected) |
| Magnolia - Simpson Acres | 81 | 0 (not detected) |
Next steps for St. Louis, MO
Look up your address in Magnolia - Big Oaks'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 Magnolia - Big Oaks 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. A zero today does not rule out a jump later - the rules are tightening in 2027.