Marston Pws, MO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Marston Pws serves about 503 people through 241 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 New Madrid County, Missouri. EPA system ID: MO4010504; phone on file: 573-643-2416. 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 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Marston Pws is 1.03 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2016 | 1.03 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. Marston Pws's reported as 0 (not detected) sits at the 24th percentile in Missouri and the 22nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
13 other systems share New Madrid County; 10 of them have a higher latest lead result than Marston Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| New Madrid Pws | 3,250 | 0 (not detected) |
| Portageville Pws | 3,200 | 6.15 ppb |
| New Madrid County Pwsd 5 | 1,800 | 3.15 ppb |
| Lilbourn Pws | 902 | 0 (not detected) |
| Gideon Pws | 780 | 5.86 ppb |
| Morehouse Pws | 749 | 6.52 ppb |
| New Madrid County Pwsd 4 | 673 | 2.9 ppb |
| Matthews Pws | 628 | 3.28 ppb |
| New Madrid County Pwsd 2 | 600 | 2.06 ppb |
| New Madrid County Pwsd # 6 | 500 | 2.18 ppb |
Your move
Look up your address in Marston Pws's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Marston 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.