St Paul 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
St Paul Pws serves about 1,700 people through 692 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 St. Charles County, Missouri. EPA system ID: MO6011535; phone on file: 636-385-5197. They can tell you what your service line is made of and whether they pay to replace it.
St Paul Pws's lead record
Against the period ending 2022 (0.79 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for St Paul Pws is 4.29 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2022 | 0.79 ppb |
| 2021 | 0.79 ppb |
| 2021 | 0.79 ppb |
| 2019 | 1.4 ppb |
| 2018 | 1.4 ppb |
| 2018 | 1.4 ppb |
| 2016 | 4.29 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. St Paul Pws's reported as 0 (not detected) sits at the 32nd percentile in Missouri and the 30th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
17 other systems share St. Charles County; 8 of them have a higher latest lead result than St Paul Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| St Charles County Pwsd 2 | 100,587 | 2.28 ppb |
| St Charles Pws | 78,961 | 0 (not detected) |
| St Peters Pws | 52,575 | 0 (not detected) |
| Wentzville Pws | 41,784 | 4.77 ppb |
| Ofallon Pws | 32,515 | 1.48 ppb |
| St Charles Co Pwsd 2 Augusta | 881 | 1.47 ppb |
| St Charles Pwsd 2 Foristell | 550 | 2.32 ppb |
| Mo American Jaxson | 535 | 0 (not detected) |
| Ecm Water & Sewer Authority - Flint Hill | 469 | 0 (not detected) |
| Portage Des Sioux Pws | 345 | 2.6 ppb |
Next steps for O'Fallon, MO
Look up your address in St Paul 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 St Paul 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.