Home hazard report for 46546 — Mishawaka, IN
ZIP 46546 is served by Mishawaka Utilities: no health-based violations since 2016, latest lead result 7.1 ppb, PFAS 4.2 ppt. St. Joseph is in EPA radon zone 1.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2024). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 5 PFAS compounds detected.
Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
The nearest active Superfund site is 3.9 miles away.
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Where ZIP 46546 is
blue: utility service area · scroll or pinch to zoomDrinking water: Mishawaka Utilities
Health-based violations
No health-based violations reported since 2016.
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 |
|---|---|---|---|
| PFHxS | 5.6 ppt | 2 of 8 | — |
| PFBA | 5.2 ppt | 1 of 8 | — |
| PFOS | 4.2 ppt | 1 of 8 | 4 ppt MCL |
| PFBS | 3.7 ppt | 1 of 8 | — |
| PFPeA | 3.3 ppt | 1 of 8 | — |
| HFPO-DA (GenX) | not detected | 0 of 8 | — |
| PFHpA | not detected | 0 of 8 | — |
| PFNA | not detected | 0 of 8 | — |
| PFOA | not detected | 0 of 8 | 4 ppt MCL |
| PFDA | not detected | 0 of 8 | — |
| PFHxA | not detected | 0 of 8 | — |
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 St. Joseph
EPA radon zone 1 — highest potential. Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
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 |
|---|---|---|
| Douglas Road/Uniroyal, Inc., Landfill Mishawaka, Indiana · EPA ID IND980607881 | Active (final NPL) | 3.9 mi |
| Galen Myers Dump/Drum Salvage Osceola, Indiana · EPA ID IND980999635 | Active (final NPL) | 4.3 mi |
| North Shore Drive Elkhart, Indiana · EPA ID INSFN0507828 | Active (final NPL) | 5.6 mi |
| Whiteford Sales & Service Inc./Nationalease South Bend, Indiana · EPA ID IND980999791 | Cleaned up & deleted | 6.3 mi |
| Beck's Lake South Bend, Indiana · EPA ID IND980904379 | Active (final NPL) | 7.2 mi |
| Conrail Rail Yard (Elkhart) Elkhart, Indiana · EPA ID IND000715490 | Active (final NPL) | 7.6 mi |
| Himco Dump Elkhart, Indiana · EPA ID IND980500292 | Active (final NPL) | 8.4 mi |
| Lusher Street Ground Water Contamination Elkhart, Indiana · EPA ID IND982073785 | Active (final NPL) | 8.4 mi |
| Main Street Well Field Elkhart, Indiana · EPA ID IND980794358 | Active (final NPL) | 9.6 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 46546
Who supplies drinking water to ZIP 46546?
Mishawaka Utilities (EPA ID IN5271009), a groundwater (wells) system serving about 49,675 people.
Is there lead in Mishawaka, IN tap water?
The utility’s latest 90th-percentile lead result (Jan 2024) was 7.1 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 Mishawaka, IN water have PFAS?
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 5 PFAS compounds detected.
Has the water system in 46546 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 46546?
The nearest active Superfund site is 3.9 miles away. Sites within 10 miles: Douglas Road/Uniroyal, Inc., Landfill (3.9 mi, Active (final NPL)); Galen Myers Dump/Drum Salvage (4.3 mi, Active (final NPL)); North Shore Drive (5.6 mi, Active (final NPL)).
Is radon a problem in St. Joseph?
St. Joseph is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.