Winding Waters, MO
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (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
Winding Waters serves about 608 people through 243 service connections, which makes it a small system under EPA's size classes. It is under mixed public and private ownership and draws groundwater, in Marion County, Missouri. EPA system ID: FL3424691; phone on file: 314-736-4672. 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 7.2 ppb from 7.2 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Winding Waters is 18 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 7.2 ppb |
| 2024 | 18 ppb over 15 |
| 2021 | 2.2 ppb |
| 2018 | 1.8 ppb |
How Winding Waters 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. Winding Waters's reported as 0 (not detected) sits at the 25th percentile in Missouri and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
27 other systems share Marion County; 5 of them have a higher latest lead result than Winding Waters. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hannibal Pws | 17,108 | 5.28 ppb |
| Marion County Pwsd 1 | 4,900 | 3.07 ppb |
| Palmyra Pws | 3,595 | 1.13 ppb |
| Sun Ray Estates | 1,460 | 0 (not detected) |
| Tradewinds Village | 1,218 | 0 (not detected) |
| Little Lake Weir Subdivision | 1,138 | 0 (not detected) |
| Ocala Heights S/D | 1,045 | 0 (not detected) |
| Ocklawaha Water Works (2 Wtps) | 965 | 0 (not detected) |
| Sandy Acres | 678 | 1.4 ppb |
| Hilltop At Lake Weir | 595 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Des Peres, 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 Winding Waters 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. More in what a past exceedance means today.