Magnolia-Pruden Creek, MO
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). 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-Pruden Creek serves about 324 people through 108 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in St. Tammany Parish County, Missouri. EPA system ID: LA1103197; phone on file: 314-380-5545. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 39.2 ppb from 39.2 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Magnolia-Pruden Creek is 39.2 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 39.2 ppb over 15 |
| 2022 | 0 (not detected) |
| 2019 | 1 ppb |
| 2019 | 0 (not detected) |
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. Magnolia-Pruden Creek's reported as 0 (not detected) sits at the 19th percentile in Missouri and the 19th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
25 other systems share St. Tammany Parish County; 10 of them have a higher latest lead result than Magnolia-Pruden Creek. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Magnolia-Eden Isles | 10,155 | 1 ppb |
| Magnolia-Greenleaves | 8,031 | 0.31 ppb |
| Magnolia-Resolve Whisperwood | 6,867 | 1 ppb |
| Magnolia-The Meadows | 4,701 | 0.92 ppb |
| Magnolia-Lakeshore Estates | 4,146 | 1 ppb |
| Magnolia-Guste Island | 2,847 | 0 (not detected) |
| Magnolia-Penn Mill Lakes | 1,152 | 0 (not detected) |
| Magnolia-Money Hills Estates | 825 | 0 (not detected) |
| Magnolia-River Park | 822 | 0 (not detected) |
| Magnolia - Brier Lake | 630 | 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-Pruden Creek 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. 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.