Missouri · population 9,171
Lead pipes in Des Peres, MO
741 lead or galvanized lines to replace
Most of Des Peres (population 9,171) gets its water from Kirkwood PWS. That system reported 540 lead and 201 galvanized-requiring-replacement service lines out of 10,258, with 1,666 more of unknown material.
7.2% of Kirkwood PWS'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 5.3%
- Galvanized (replace) 2.0%
- Unknown 16%
- Non-lead 77%
Latest lead test for Kirkwood PWS (Jan 2023–Dec 2025): not detected 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 Kirkwood PWS.
Water systems serving Des Peres
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Kirkwood PWSMain system | 540 | 201 | 1,666 | 7.2% |
| Mo American St Louis St Charles CountiesAlso serves parts of the city | 9,422 | 1,247 | 191,341 | 2.7% |
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 Des Peres
The counts above cover the whole water system. To see whether your line is lead, look up your address on Kirkwood PWS'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
- Kirkwood741 lead + galv. lines
- Frontenac10,669 lead + galv. lines
- Town and Country10,669 lead + galv. lines
- Warson Woods10,669 lead + galv. lines
- Glendale741 lead + galv. lines
- Manchester10,669 lead + galv. lines
- Oakland741 lead + galv. lines
- Ladue10,669 lead + galv. lines
Check another water system
Questions
Does Des Peres, MO have lead pipes?
Yes. Kirkwood PWS, which serves Des Peres, reported 540 lead and 201 galvanized-requiring-replacement service lines, plus 1,666 of unknown material.
Who supplies water to Des Peres?
EPA's service area maps place most of Des Peres in Kirkwood PWS's service area (PWSID MO6010430). Mo American St Louis St Charles Counties also serves parts of the city or nearby areas.
How do I check whether my Des Peres home has a lead service line?
Search your address on Kirkwood PWS'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 Des Peres 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 Kirkwood PWS whether your street is scheduled and whether it covers the private side.