Twin Island Estates, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 4.58 ppb (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. 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
Twin Island Estates serves about 525 people through 219 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Stone County, Missouri. EPA system ID: MO5036186; phone on file: 319-350-0045. 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 up 2.61 ppb from 1.97 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Twin Island Estates is 6.9 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.58 ppb |
| 2022 | 1.97 ppb |
| 2022 | 1.97 ppb |
| 2019 | 6.9 ppb |
| 2019 | 6.9 ppb |
| 2019 | 5.34 ppb |
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. Twin Island Estates's 4.58 ppb sits at the 90th percentile in Missouri and the 89th nationally (higher means more lead).
Neighbouring systems
87 other systems share Stone County; 11 of them have a higher latest lead result than Twin Island Estates. 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 |
| Ocwc Lantern Bay | 502 | 3.54 ppb |
| Galena Pws | 500 | 1.01 ppb |
| Branson West Pws | 484 | 0 (not detected) |
Next steps for Blue Eye, MO
Test your own tap with a certified lab first-draw sample; Blue Eye, 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 Twin Island Estates 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.