Missouri · population 42,564
Lead pipes in Jefferson, MO
512 lead or galvanized lines to replace
Most of Jefferson (population 42,564) gets its water from Mo American Jefferson City District. That system reported 234 lead and 278 galvanized-requiring-replacement service lines out of 11,727, with 6,777 more of unknown material.
4.4% of Mo American Jefferson City District's service lines are lead or galvanized requiring replacement, higher than the Missouri average (3.3%) and higher than the national average (3.1%).
- Lead 2.0%
- Galvanized (replace) 2.4%
- Unknown 58%
- Non-lead 38%
Latest lead test for Mo American Jefferson City District (Jan 2023–Dec 2025): 2 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Mo American Jefferson City District.
Water systems serving Jefferson
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Mo American Jefferson City DistrictMain system | 234 | 278 | 6,777 | 4.4% |
| Cole County PWSD 2Serves nearby areas | 0 | 0 | 3,324 | 0% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in Jefferson
The counts above cover the whole water system. To see whether your line is lead, look up your address on Mo American Jefferson City District's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Wardsville1 lead + galv. lines
- Holts Summitno lead reported
- Taos782 unknown
- St. Martinsno lead reported
- Ashland9,439 unknown
- Linn159 unknown
- California373 unknown
- Fulton7 lead + galv. lines
Check another water system
Questions
Does Jefferson, MO have lead pipes?
Yes. Mo American Jefferson City District, which serves Jefferson, reported 234 lead and 278 galvanized-requiring-replacement service lines, plus 6,777 of unknown material.
Who supplies water to Jefferson?
EPA's service area maps place most of Jefferson in Mo American Jefferson City District's service area (PWSID MO3010409). Cole County PWSD 2 also serves parts of the city or nearby areas.
How do I check whether my Jefferson home has a lead service line?
Search your address on Mo American Jefferson City District's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in Jefferson be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Mo American Jefferson City District whether your street is scheduled and whether it covers the private side.