Jonesburg Pws, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.36 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.
Jonesburg Pws at a glance
Jonesburg Pws serves about 768 people through 341 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Montgomery County, Missouri. EPA system ID: MO6010412; phone on file: 636-488-5508. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2022 (1.2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Jonesburg Pws is 4.52 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.36 ppb |
| 2022 | 1.2 ppb |
| 2022 | 1.2 ppb |
| 2019 | 2.13 ppb |
| 2019 | 2.13 ppb |
| 2016 | 4.52 ppb |
| 2016 | 4.52 ppb |
How Jonesburg Pws 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. Jonesburg Pws's 1.36 ppb sits at the 58th percentile in Missouri and the 61st nationally (higher means more lead).
Neighbouring systems
14 other systems share Montgomery County; 10 of them have a higher latest lead result than Jonesburg Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Montgomery City Pws | 2,811 | 1.49 ppb |
| Wellsville Pws | 1,210 | 2.91 ppb |
| New Florence Pws | 769 | 0 (not detected) |
| Heritage Oaks Subdivision | 447 | 2.66 ppb |
| Bellflower Pws | 350 | 4.88 ppb |
| Montgomery County Pwsd 1 Jonesburg | 300 | 6.67 ppb |
| High Hill Pws | 300 | 4.6 ppb |
| Texas Landing Utilities Deerwood | 276 | 0 (not detected) |
| Texas Landing Utilities Goode City | 168 | 0.34 ppb |
| Middletown Pws | 167 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Jonesburg, 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 Jonesburg Pws 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. Systems that went over once often dip back under; here is what that means.