Indiana · population 36,989
Lead pipes in Merrillville, IN
11,016 lead or galvanized lines to replace
Most of Merrillville (population 36,989) gets its water from Indiana American Water - Northwest. That system reported 10,833 lead and 183 galvanized-requiring-replacement service lines out of 91,302, with 36,484 more of unknown material.
12% of Indiana American Water - Northwest's service lines are lead or galvanized requiring replacement, higher than the Indiana average (9.0%) and higher than the national average (3.1%).
- Lead 12%
- Galvanized (replace) 0.2%
- Unknown 40%
- Non-lead 48%
Latest lead test for Indiana American Water - Northwest (Jan 2022–Dec 2024): 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 Indiana American Water - Northwest.
Water systems serving Merrillville
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Indiana American Water - NorthwestMain system | 10,833 | 183 | 36,484 | 12% |
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 Merrillville
The counts above cover the whole water system. To see whether your line is lead, look up your address on Indiana American Water - Northwest'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
- Hobartno lead reported
- Crown Point199 lead + galv. lines
- Winfield11,016 lead + galv. lines
- New Chicagono lead reported
- Schererville20 lead + galv. lines
- Griffith16 lead + galv. lines
- Lake Station11,016 lead + galv. lines
- St. Johnno lead reported
Check another water system
Questions
Does Merrillville, IN have lead pipes?
Yes. Indiana American Water - Northwest, which serves Merrillville, reported 10,833 lead and 183 galvanized-requiring-replacement service lines, plus 36,484 of unknown material.
Who supplies water to Merrillville?
EPA's service area maps place most of Merrillville in Indiana American Water - Northwest's service area (PWSID IN5245015).
How do I check whether my Merrillville home has a lead service line?
Search your address on Indiana American Water - Northwest'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 Merrillville 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 Indiana American Water - Northwest whether your street is scheduled and whether it covers the private side.