Sioux City Lead Service Line Replacement Program
Sioux City Water Supply serves about 85,791 people and reported 4,271 lead service lines that must be replaced, out of 25,645 lines, in EPA's Q3 2026 inventory, plus 2,587 lines of unknown material. Here's who pays to replace yours, what it costs, and how to sign up.
$35M-$50M plan in development
Sioux City has identified about 7,300 properties that may have a lead or lead-affected galvanized service line. Staff told the council the effort could cost $35 million to $50 million, mostly from the drinking water State Revolving Fund, with replacement starting after the plan is finished in 2027 and ending by 2037. No homeowner share has been set.
How to get it
- Check the notice the city mailed you about your line.
- Ask the Water Plant office whether owners will pay a share.
- Use a certified filter if your line is lead.
Sources: cpo.soar.com, kjan.com
Lead lines in Sioux City
The most recent 90th-percentile lead result EPA lists for this system is 2 parts per billion (2023-01 to 2025-12). Under the new federal rule, the action level drops to 10 ppb in 2027. Galvanized lines count if they ever sat downstream of a lead pipe, because they can hold lead particles. Unknown lines must be identified by the utility, and many turn out to be lead.
How Sioux City compares: it ranks #116 of 7,556 U.S. water systems and #4 of 402 in Iowa for lead and galvanized lines. 16.7% of its service lines need replacing, compared with 7.7% across Iowa. See the national ranking.
Source: EPA SDWIS Service Line Inventory, Q3 2026 · Utility phone: 712-279-6150 · PWSID IA9778054
Sioux City lead service line map: check your address
Every water utility had to publish an inventory of its service lines, and most offer an address lookup map. Start with Sioux City Water Supply's official lead program page, which links to its lookup or explains how to get your line checked. The status will be lead, galvanized requiring replacement, non-lead or unknown. If it's unknown, you can usually check the pipe yourself and send the utility a photo.
Communities and ZIP codes served
ZIP codes: 51101, 51104, 51105, 51106
Who pays in Iowa?
Iowa leaves the cost split to each utility: some pay the whole cost, some split it, and some leave it to the owner. Iowa DNR cites an EPA average of $4,700 per line, with a range of $1,200 to more than $12,300. Iowa American Water replaces at no direct cost, and Iowa City pays half up to $5,000.
The law: Federal Lead and Copper Rule Improvements, enforced by Iowa DNR. Mandatory? No state mandate; the federal rule requires replacement by 2037. Funding: Iowa State Revolving Fund.
Sources: iowadnr.gov
Nationwide, EPA's Lead and Copper Rule Improvements require most utilities to replace every lead and galvanized-requiring-replacement line by December 31, 2037, starting November 1, 2027. Utilities must mail a notice every year to each home with a lead, galvanized or unknown line. See the federal timeline.
What would you pay?
Many utility loans are 0% (enter 0). Private loans run higher. Your real price depends on how far the house sits from the street, digging versus trenchless methods, permits and restoration. This is an estimate, not a quote.
Not covered, or can't wait?
Get up to 3 quotes from licensed plumbers who replace service lines in Sioux City.
Common questions
Is lead service line replacement free in Sioux City?
Not yet. Sioux City has identified about 7,300 properties that may have a lead or lead-affected galvanized service line.
Is lead service line replacement mandatory in Sioux City?
No state mandate; the federal rule requires replacement by 2037.
How much does it cost to replace a lead service line in Sioux City?
Most private-side replacements cost about $4,000 to $10,000, and long or difficult lines can run higher. Price depends on the distance from the street to your house, whether the contractor digs a trench or pulls the new pipe through (trenchless), permits, and restoring your lawn, sidewalk or basement wall.
How do I know if my home has a lead service line?
Look up your address on Sioux City Water Supply's service line inventory or check the letter it mailed you. You can also check the pipe where it enters your basement, usually near the meter: lead is dull gray, soft, and turns shiny silver when you scratch it with a key, and a magnet won't stick. Galvanized steel is gray too, but a magnet sticks to it. See our step-by-step guide.
What if I can't afford to replace my lead line?
Ask Sioux City Water Supply about income-based help first; federal money often makes replacement free for low-income owners. Other options are utility payment plans, 0% city loans, state revolving fund programs, property tax assessments and home improvement loans. Our guide on paying for replacement lists them.
Who owns the water service line?
In most U.S. cities the utility owns the pipe from the water main to the curb stop or property line, and the property owner owns the rest, into the house. Some utilities, including Minneapolis and many in St. Louis County, treat the whole line as the owner's. Federal rules now require utilities to replace the whole lead line, not just their part.
Other Iowa programs
Davenport ✓Des Moines ✓Iowa City ✓Cedar Rapids ✓Muscatine ✓Clinton (Iowa American Water) ✓AnkenyCouncil BluffsMason CityBoone
Something out of date? Report a change. We recheck program terms at least once a year.