Platte Co Pwsd 4, 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.
Platte Co Pwsd 4 at a glance
Platte Co Pwsd 4 serves about 9,552 people through 3,943 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Platte County, Missouri. EPA system ID: MO1024478; phone on file: 816-858-2782. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Platte Co Pwsd 4's lead record
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Platte Co Pwsd 4 is 1.36 ppb across 7 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 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 1.36 ppb |
| 2016 | 1.36 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. Platte Co Pwsd 4's reported as 0 (not detected) sits at the 38th percentile in Missouri and the 37th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
18 other systems share Platte County; 13 of them have a higher latest lead result than Platte Co Pwsd 4. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mo American Platte County | 16,645 | 0 (not detected) |
| Platte County Cons Pwsd 1 | 7,074 | 3.22 ppb |
| Platte City Pws | 4,691 | 0 (not detected) |
| Platte County Pwsd 6 | 2,095 | 1.1 ppb |
| Weatherby Lake Pws | 2,077 | 0 (not detected) |
| Platte Co Pwsd 9 | 1,860 | 1.19 ppb |
| Weston Pws | 1,850 | 1.11 ppb |
| Platte County Pwsd 7 | 1,750 | 0 (not detected) |
| Platte County Pwsd 8 | 1,200 | 1.66 ppb |
| Lake Waukomis Pws | 1,083 | 2.16 ppb |
Your move
Look up your address in Platte Co Pwsd 4'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 Platte Co Pwsd 4 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. Small systems behave differently: why small systems go over more often.