Iowa · population 11,575
Lead pipes in Oskaloosa, IA
65 lead or galvanized lines to replace
Most of Oskaloosa (population 11,575) gets its water from Oskaloosa Municipal Water Dept. That system reported 64 lead and 1 galvanized-requiring-replacement service lines out of 5,462, with 3,664 more of unknown material.
1.2% of Oskaloosa Municipal Water Dept'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 1.2%
- Galvanized (replace) <0.1%
- Unknown 67%
- Non-lead 32%
Latest lead test for Oskaloosa Municipal Water Dept (Jan 2023–Dec 2025): 1.3 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 Oskaloosa Municipal Water Dept.
Water systems serving Oskaloosa
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Oskaloosa Municipal Water DeptMain system | 64 | 1 | 3,664 | 1.2% |
| Mahaska Rural Water System, INC.Also serves parts of the city | 0 | 0 | 103 | 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 Oskaloosa
The counts above cover the whole water system. To see whether your line is lead, look up your address on Oskaloosa Municipal Water Dept'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
Check another water system
Questions
Does Oskaloosa, IA have lead pipes?
Yes. Oskaloosa Municipal Water Dept, which serves Oskaloosa, reported 64 lead and 1 galvanized-requiring-replacement service lines, plus 3,664 of unknown material.
Who supplies water to Oskaloosa?
EPA's service area maps place most of Oskaloosa in Oskaloosa Municipal Water Dept's service area (PWSID IA6273005). Mahaska Rural Water System, INC. also serves parts of the city or nearby areas.
How do I check whether my Oskaloosa home has a lead service line?
Search your address on Oskaloosa Municipal Water Dept'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 Oskaloosa 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 Oskaloosa Municipal Water Dept whether your street is scheduled and whether it covers the private side.