Bonne Terre Prison, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 8.07 ppb (monitoring period 2021-2023). 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
Bonne Terre Prison serves about 3,500 people through 1 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by the state and draws groundwater, in St. Francois County, Missouri. EPA system ID: MO4061410; phone on file: 573-430-8689. 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 up 8.07 ppb from 0 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Bonne Terre Prison is 9.6 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 8.07 ppb |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 1.78 ppb |
| 2017 | 1.78 ppb |
| 2016 | 9.6 ppb |
How Bonne Terre Prison 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. Bonne Terre Prison's 8.07 ppb sits at the 97th percentile in Missouri and the 96th nationally (higher means more lead).
Other water systems in St. Francois County
19 other systems share St. Francois County; 3 of them have a higher latest lead result than Bonne Terre Prison. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Farmington Pws | 18,217 | 4.82 ppb |
| Park Hills Pws | 8,587 | 8.6 ppb |
| Desloge Pws | 5,034 | 3.69 ppb |
| Bonne Terre Pws | 3,537 | 12.9 ppb |
| Farmington Correctional Center | 3,500 | 0 (not detected) |
| Terre Du Lac | 3,200 | 3.9 ppb |
| Bismarck Pws | 1,475 | 1.9 ppb |
| Leadwood Pws | 1,200 | 1.11 ppb |
| St Francois County Pwsd 2 | 850 | 1.51 ppb |
| Pilot Knob Rural Wd 1 Doe Run Area | 507 | 1.4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Bonne Terre, 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 Bonne Terre Prison 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.