Dearborn Pws, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 3.39 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.
About Dearborn Pws
Dearborn Pws serves about 670 people through 252 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 surface water, in Platte County, Missouri. EPA system ID: MO1010204; phone on file: 816-694-2676. They can tell you what your service line is made of and whether they pay to replace it.
Dearborn Pws's lead record
Against the period ending 2022 (2.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Dearborn Pws is 3.39 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.39 ppb |
| 2022 | 2.4 ppb |
| 2022 | 2.4 ppb |
| 2019 | 1.53 ppb |
| 2019 | 1.53 ppb |
| 2016 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Dearborn 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. Dearborn Pws's 3.39 ppb sits at the 84th percentile in Missouri and the 84th nationally (higher means more lead).
Other water systems in Platte County
18 other systems share Platte County; 1 of them has a higher latest lead result than Dearborn Pws. 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 Co Pwsd 4 | 9,552 | 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 |
What to do in your house
Test your own tap with a certified lab first-draw sample; Dearborn, 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 Dearborn 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. Size matters more than most people expect: small vs large water systems.