Jefferson Co Cons Pwsd C 1, 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.
Jefferson Co Cons Pwsd C 1 at a glance
Jefferson Co Cons Pwsd C 1 serves about 37,000 people through 15,007 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Jefferson County, Missouri. EPA system ID: MO6024295; phone on file: 636-948-2500. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Jefferson Co Cons Pwsd C 1's lead record
That is down 1.51 ppb from 1.51 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Jefferson Co Cons Pwsd C 1 is 1.84 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1.51 ppb |
| 2022 | 1.51 ppb |
| 2019 | 1.84 ppb |
| 2019 | 1.84 ppb |
| 2016 | 1.72 ppb |
| 2016 | 1.72 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. Jefferson Co Cons Pwsd C 1's reported as 0 (not detected) sits at the 39th percentile in Missouri and the 39th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
65 other systems share Jefferson County; 42 of them have a higher latest lead result than Jefferson Co Cons Pwsd C 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Jefferson County Pwsd 1 | 21,113 | 7.25 ppb |
| Jefferson County Pwsd 3 | 17,000 | 0 (not detected) |
| Jefferson County Pwsd 2 | 16,548 | 0 (not detected) |
| Festus Pws | 13,000 | 0 (not detected) |
| Jefferson County Pwsd 10 | 10,000 | 3.86 ppb |
| Jefferson County Pwsd 5 | 8,000 | 1.13 ppb |
| Jefferson County Pwsd 6 | 7,500 | 2.93 ppb |
| Desoto Pws | 6,400 | 1.46 ppb |
| Jefferson County Pwsd 7 | 6,100 | 1.7 ppb |
| Pevely Pws | 5,600 | 2.21 ppb |
What to do in your house
Look up your address in Jefferson Co Cons Pwsd C 1'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 Jefferson Co Cons Pwsd C 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. A zero today does not rule out a jump later - the rules are tightening in 2027.