Iowa · population 25,022
Lead pipes in Johnston, IA
No lead lines reported
Most of Johnston (population 25,022) gets its water from Johnston Municipal Water Supply, which reported 5,506 service lines and no lead, galvanized or unknown lines.
0% of Johnston Municipal Water Supply's service lines are lead or galvanized requiring replacement, lower than the Iowa average (5.6%) and lower than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 0%
- Unknown 0%
- Non-lead 100%
Latest lead test for Johnston Municipal Water Supply (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 Johnston Municipal Water Supply.
Water systems serving Johnston
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Johnston Municipal Water SupplyMain system | 0 | 0 | 0 | 0% |
| Camp Dodge Water SupplyAlso serves parts of the city | 0 | 0 | 0 | 0% |
| Grimes Water SupplyServes nearby areas | 0 | 7 | 0 | 0.1% |
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 Johnston
The counts above cover the whole water system. To see whether your line is lead, look up your address on Johnston Municipal Water Supply'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
- Grimes7 lead + galv. lines
- Urbandale1 unknown
- Windsor Heights1 unknown
- Polk12 unknown
- Granger8 lead + galv. lines
- Clive45 lead + galv. lines
- Ankeny6,630 lead + galv. lines
- West Des Moines59 lead + galv. lines
Check another water system
Questions
Does Johnston, IA have lead pipes?
Johnston Municipal Water Supply, which serves Johnston, reported no lead, galvanized or unknown service lines.
Who supplies water to Johnston?
EPA's service area maps place most of Johnston in Johnston Municipal Water Supply's service area (PWSID IA7740011). Camp Dodge Water Supply, Grimes Water Supply also serve parts of the city or nearby areas.
How do I check whether my Johnston home has a lead service line?
Search your address on Johnston Municipal Water Supply'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 Johnston 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 Johnston Municipal Water Supply whether your street is scheduled and whether it covers the private side.