Home hazard report for 46401 — Gary, IN
ZIP 46401 is served by Indiana American Water - Northwest (as listed by the state): no health-based violations since 2016, latest lead result 3 ppb, PFAS not detected. Lake is in EPA radon zone 2.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2022). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
The nearest active Superfund site is 3.5 miles away.
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Where ZIP 46401 is
blue: utility service area · scroll or pinch to zoomDrinking water: Indiana American Water - Northwest
Health-based violations
No health-based violations reported since 2016.
Full record for Indiana American Water - Northwest →
Other systems listed for this ZIP: New Chicago Water Works.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| HFPO-DA (GenX) | not detected | 0 of 8 | — |
| PFBA | not detected | 0 of 8 | — |
| PFPeA | not detected | 0 of 8 | — |
| PFHxS | not detected | 0 of 8 | — |
| PFHpA | not detected | 0 of 8 | — |
| PFDA | not detected | 0 of 8 | — |
| PFOA | not detected | 0 of 8 | 4 ppt MCL |
| PFBS | not detected | 0 of 8 | — |
| PFNA | not detected | 0 of 8 | — |
| PFHxA | not detected | 0 of 8 | — |
| PFOS | not detected | 0 of 8 | 4 ppt MCL |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
Radon in Lake
EPA radon zone 2 — moderate potential. Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Lake Sandy Jo (M&M Landfill) Gary, Indiana · EPA ID IND980500524 | Active (final NPL) | 3.5 mi |
| MIDCO II Gary, Indiana · EPA ID IND980679559 | Active (final NPL) | 5.1 mi |
| MIDCO I Gary, Indiana · EPA ID IND980615421 | Active (final NPL) | 5.6 mi |
| Ninth Avenue Dump Gary, Indiana · EPA ID IND980794432 | Active (final NPL) | 5.6 mi |
| Gary Development Landfill Gary, Indiana · EPA ID IND077005916 | Active (final NPL) | 5.7 mi |
| American Chemical Service, Inc. Griffith, Indiana · EPA ID IND016360265 | Active (final NPL) | 7.4 mi |
| U.S. Smelter and Lead Refinery, Inc. East Chicago, Indiana · EPA ID IND047030226 | Active (final NPL) | 7.7 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 46401
Who supplies drinking water to ZIP 46401?
Indiana American Water - Northwest (EPA ID IN5245015), a surface water (rivers, lakes) system serving about 210,510 people, listed by the state as serving this ZIP code.
Is there lead in Gary, IN tap water?
The utility’s latest 90th-percentile lead result (Jan 2022) was 3 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Gary, IN water have PFAS?
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Has the water system in 46401 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 46401?
The nearest active Superfund site is 3.5 miles away. Sites within 10 miles: Lake Sandy Jo (M&M Landfill) (3.5 mi, Active (final NPL)); MIDCO II (5.1 mi, Active (final NPL)); MIDCO I (5.6 mi, Active (final NPL)).
Is radon a problem in Lake?
Lake is in EPA radon zone 2 (moderate potential). Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.