Mo American Tri State, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2024-2026). 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.
About Mo American Tri State
Mo American Tri State serves about 8,680 people through 3,448 service connections, which makes it a medium-sized system under EPA's size classes. It is privately owned and draws groundwater, in Taney County, Missouri. EPA system ID: MO5024601; phone on file: 417-680-0314. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 3 ppb from 5 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Mo American Tri State is 5 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2023 | 5 ppb |
| 2020 | 4 ppb |
| 2017 | 3 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. Mo American Tri State's 2 ppb sits at the 71st percentile in Missouri and the 73rd nationally (higher means more lead).
Neighbouring systems
51 other systems share Taney County; 12 of them have a higher latest lead result than Mo American Tri State. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Branson Pws | 12,640 | 2.92 ppb |
| Taney County Pwsd 3 | 6,000 | 3.87 ppb |
| Taney County Pwsd 2 | 5,500 | 1.92 ppb |
| Hollister Pws | 4,426 | 0 (not detected) |
| Forsyth Pws | 2,730 | 2.75 ppb |
| Holiday Hills Resort | 2,065 | 3.83 ppb |
| Taney County Pwsd 1 | 2,000 | 1.17 ppb |
| Merriam Woods Pws | 1,839 | 5 ppb |
| College Of The Ozarks | 1,700 | 0 (not detected) |
| Mo American Emerald Pointe Subd | 1,275 | 0 (not detected) |
Next steps for Joplin, MO
Test your own tap with a certified lab first-draw sample; Joplin, 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 Mo American Tri State 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. Size matters more than most people expect: small vs large water systems.