Windsor Pws, MO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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.
Windsor Pws at a glance
Windsor Pws serves about 2,900 people through 1,131 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 Henry County, Missouri. EPA system ID: MO1010865; phone on file: 660-647-3512. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Windsor Pws is 6.9 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 1.39 ppb |
| 2016 | 6.9 ppb |
Where this result ranks
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. Windsor Pws's reported as 0 (not detected) sits at the 35th percentile in Missouri and the 33rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Henry County
10 other systems share Henry County; 5 of them have a higher latest lead result than Windsor Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Henry County Water Company | 11,373 | 3.37 ppb |
| Henry County Pwsd 3 | 2,993 | 0 (not detected) |
| Henry County Pwsd 4 | 1,140 | 1.23 ppb |
| Urich Pws | 505 | 0 (not detected) |
| Deepwater Pws | 433 | 1.49 ppb |
| Montrose Pws | 384 | 0 (not detected) |
| Calhoun Pws | 324 | 0 (not detected) |
| Henry County Pwsd 1 | 258 | 2.44 ppb |
| Blairstown Pws | 123 | 0.72 ppb |
| Oakwood Water Assn | 28 | 0 (not detected) |
What to do in your house
Look up your address in Windsor 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 Windsor 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.