Illinois · population 151,837
Lead pipes in Joliet, IL
307 lead or galvanized lines to replace
Most of Joliet (population 151,837) gets its water from Joliet. That system reported 299 lead and 8 galvanized-requiring-replacement service lines out of 47,852, with 6,188 more of unknown material.
0.6% of Joliet's service lines are lead or galvanized requiring replacement, lower than the Illinois average (17%) and lower than the national average (3.1%).
- Lead 0.6%
- Galvanized (replace) <0.1%
- Unknown 13%
- Non-lead 86%
Latest lead test for Joliet (Jan 2026–Jun 2026): 6.5 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists 1 Lead and Copper Rule violation since 2015 for Joliet.
Water systems serving Joliet
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| JolietMain system | 299 | 8 | 6,188 | 0.6% |
| Southeast Joliet SDAlso serves parts of the city | 0 | 0 | 0 | – |
| Crystal Lawns Addition Improvement AssocAlso serves parts of the city | 0 | 0 | 0 | 0% |
| RockdaleServes nearby areas | 14 | 0 | 13 | 1.7% |
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 Joliet
The counts above cover the whole water system. To see whether your line is lead, look up your address on Joliet'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
- Rockdale14 lead + galv. lines
- Shorewoodno lead reported
- Crest Hill138 lead + galv. lines
- Elwood1,103 unknown
- Lockport44 lead + galv. lines
- Minookano lead reported
- Plainfield128 lead + galv. lines
- Channahonno lead reported
Check another water system
Questions
Does Joliet, IL have lead pipes?
Yes. Joliet, which serves Joliet, reported 299 lead and 8 galvanized-requiring-replacement service lines, plus 6,188 of unknown material.
Who supplies water to Joliet?
EPA's service area maps place most of Joliet in Joliet's service area (PWSID IL1970450). Southeast Joliet SD, Crystal Lawns Addition Improvement Assoc, Rockdale also serve parts of the city or nearby areas.
How do I check whether my Joliet home has a lead service line?
Search your address on Joliet'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 Joliet 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 Joliet whether your street is scheduled and whether it covers the private side.