Jefferson Co Pwsd 8, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 2.48 ppb (monitoring period 2022-2024). 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
Jefferson Co Pwsd 8 serves about 4,733 people through 2,111 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 groundwater, in Jefferson County, Missouri. EPA system ID: MO6024300; phone on file: 636-274-3125. 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 (1.81 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Jefferson Co Pwsd 8 is 7.1 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.48 ppb |
| 2022 | 1.81 ppb |
| 2021 | 1.81 ppb |
| 2021 | 1.81 ppb |
| 2019 | 2.73 ppb |
| 2018 | 2.73 ppb |
| 2018 | 2.73 ppb |
| 2016 | 7.1 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. Jefferson Co Pwsd 8's 2.48 ppb sits at the 77th percentile in Missouri and the 77th nationally (higher means more lead).
Nearby utilities
65 other systems share Jefferson County; 17 of them have a higher latest lead result than Jefferson Co Pwsd 8. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Jefferson Co Cons Pwsd C 1 | 37,000 | 0 (not detected) |
| 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 |
Next steps for Cedar Hill, MO
Test your own tap with a certified lab first-draw sample; Cedar Hill, 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 Jefferson Co Pwsd 8 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.