Sullivan County Pwsd 1, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.14 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.
Who runs the water here
Sullivan County Pwsd 1 serves about 4,412 people through 1,765 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 Sullivan County, Missouri. EPA system ID: MO2024594; phone on file: 660-265-4811. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2022 (2.03 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sullivan County Pwsd 1 is 2.22 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.14 ppb |
| 2022 | 2.03 ppb |
| 2022 | 2.03 ppb |
| 2019 | 1.24 ppb |
| 2019 | 1.24 ppb |
| 2016 | 2.22 ppb |
| 2016 | 2.22 ppb |
How Sullivan County Pwsd 1 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. Sullivan County Pwsd 1's 1.14 ppb sits at the 53rd percentile in Missouri and the 58th nationally (higher means more lead).
Other water systems in Sullivan County
6 other systems share Sullivan County; 2 of them have a higher latest lead result than Sullivan County Pwsd 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Milan Pws | 1,759 | 1.05 ppb |
| Green City Pws | 578 | 2.42 ppb |
| Green Castle Pws | 212 | 9.9 ppb |
| Newtown Pws | 109 | 0 (not detected) |
| Humphreys Pws | 98 | 0 (not detected) |
| North Central Mo Regional Water Com | 25 | - |
Next steps for Milan, MO
Test your own tap with a certified lab first-draw sample; Milan, 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 Sullivan County Pwsd 1 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.