Marionville, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.23 ppb (monitoring period 2022-2024). 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
Marionville serves about 2,092 people through 930 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Lawrence County, Missouri. EPA system ID: MO5010499. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is down 1.95 ppb from 3.18 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Marionville is 4.33 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.23 ppb |
| 2022 | 3.18 ppb |
| 2021 | 3.18 ppb |
| 2021 | 3.18 ppb |
| 2019 | 4.33 ppb |
| 2018 | 4.33 ppb |
| 2018 | 4.33 ppb |
| 2016 | 4.14 ppb |
Against other Missouri systems
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. Marionville's 1.23 ppb sits at the 55th percentile in Missouri and the 59th nationally (higher means more lead).
Other water systems in Lawrence County
11 other systems share Lawrence County; 5 of them have a higher latest lead result than Marionville. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Liberty Utilities Aurora Verona | 8,529 | 1.6 ppb |
| Mount Vernon Pws | 4,575 | 2.78 ppb |
| Pierce City Pws | 1,200 | 0 (not detected) |
| Miller Pws | 699 | 1.73 ppb |
| Stotts City Pws | 225 | 0 (not detected) |
| Halltown Pws | 185 | 0 (not detected) |
| Freistatt Pws | 165 | 1.32 ppb |
| Park Woods Water Company Inc | 80 | 0.86 ppb |
| Youngberg Estates Mhp | 70 | 1.12 ppb |
| Jamestowne Mhp | 46 | 5.1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Bolivar, 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 Marionville 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. The action level is dropping - the 10 ppb rule from 2027.