Lead Pipe Map

Iowa · population 86,875

Lead pipes in Sioux, IA

4,271 lead or galvanized lines to replace

Most of Sioux (population 86,875) gets its water from Sioux City Water Supply. That system reported 4,271 lead and 0 galvanized-requiring-replacement service lines out of 25,645, with 2,587 more of unknown material.

17% of Sioux City Water Supply's service lines are lead or galvanized requiring replacement, higher than the Iowa average (5.6%) and higher than the national average (3.1%).

4,271Lead
0Galvanized, replace
2,587Unknown material
18,787Non-lead

Latest lead test for Sioux City Water Supply (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 Sioux City Water Supply.

Water systems serving Sioux

Water systemLeadGalv.Unknown% lead
Sioux City Water SupplyMain system4,27102,58717%

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 Sioux

The counts above cover the whole water system. To see whether your line is lead, look up your address on Sioux City Water Supply's official inventory. Utilities had to make these public by October 16, 2024.

Find the official inventory mapSioux City Water Supply details

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.

Pitcher filtersCheapest start. Pick one certified to NSF/ANSI 53 for lead, such as Brita Elite, PUR Plus or ZeroWater.See pitchers Faucet-mount filtersFilters straight from the tap. Look for NSF/ANSI 53 lead reduction on the box.See faucet filters Under-sink systemsBest for families. Carbon block (NSF 53) or reverse osmosis (NSF 58) units rated for lead.See under-sink

Choosing a lead-certified filter · Testing your water · Replacement cost

Nearby cities

Check another water system

Questions

Does Sioux, IA have lead pipes?

Yes. Sioux City Water Supply, which serves Sioux, reported 4,271 lead and 0 galvanized-requiring-replacement service lines, plus 2,587 of unknown material.

Who supplies water to Sioux?

EPA's service area maps place most of Sioux in Sioux City Water Supply's service area (PWSID IA9778054).

How do I check whether my Sioux home has a lead service line?

Search your address on Sioux City 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 Sioux 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 Sioux City Water Supply whether your street is scheduled and whether it covers the private side.