Missouri · population 21,036
Lead pipes in Arnold, MO
No lead lines reported
Most of Arnold (population 21,036) gets its water from Jefferson County PWSD 1, which reported 7,347 service lines and no lead, galvanized or unknown lines.
0% of Jefferson County PWSD 1's service lines are lead or galvanized requiring replacement, lower than the Missouri average (3.3%) and lower than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 0%
- Unknown 0%
- Non-lead 100%
Latest lead test for Jefferson County PWSD 1 (Jan 2023–Dec 2025): 7.3 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 Jefferson County PWSD 1.
Water systems serving Arnold
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Jefferson County PWSD 1Main system | 0 | 0 | 0 | 0% |
| Jefferson County PWSD 10Serves nearby areas | 0 | 0 | 1,670 | 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 Arnold
The counts above cover the whole water system. To see whether your line is lead, look up your address on Jefferson County PWSD 1'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
- Green Park10,669 lead + galv. lines
- Sunset Hills10,669 lead + galv. lines
- Lakeshire10,669 lead + galv. lines
- Fenton10,669 lead + galv. lines
- Crestwood10,669 lead + galv. lines
- Pevelyno lead reported
- Marlborough10,669 lead + galv. lines
- Oakland741 lead + galv. lines
Check another water system
Questions
Does Arnold, MO have lead pipes?
Jefferson County PWSD 1, which serves Arnold, reported no lead, galvanized or unknown service lines.
Who supplies water to Arnold?
EPA's service area maps place most of Arnold in Jefferson County PWSD 1's service area (PWSID MO6024292). Jefferson County PWSD 10 also serves parts of the city or nearby areas.
How do I check whether my Arnold home has a lead service line?
Search your address on Jefferson County PWSD 1'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 Arnold 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 Jefferson County PWSD 1 whether your street is scheduled and whether it covers the private side.