Stones Mhp, MO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 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.
Who runs the water here
Stones Mhp serves about 50 people through 52 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Stone County, Missouri. EPA system ID: MO5041213; phone on file: 314-799-3053. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Stones Mhp is 10 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 0.98 ppb |
| 2019 | 0.98 ppb |
| 2019 | 10 ppb |
How Stones Mhp 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. Stones Mhp's reported as 0 (not detected) sits at the 4th percentile in Missouri and the 3rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
87 other systems share Stone County; 53 of them have a higher latest lead result than Stones Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mo American Stonebridge Village | 2,100 | 0 (not detected) |
| Stone County Pwsd 1 | 2,052 | 2.13 ppb |
| Pwsd 2 Of Stone County 265 | 1,535 | 2.59 ppb |
| Crane Pws | 1,495 | 2.59 ppb |
| Mo Ark Water Co | 1,478 | 1.52 ppb |
| Reeds Spring Pws | 1,287 | 0 (not detected) |
| Mo American Ozark Mtn Water Company 2 | 583 | 7 ppb |
| Twin Island Estates | 525 | 4.58 ppb |
| Ocwc Lantern Bay | 502 | 3.54 ppb |
| Galena Pws | 500 | 1.01 ppb |
Your move
Look up your address in Stones Mhp'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 Stones Mhp 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.