Is Merrillville, Indiana tap water safe?
3 water systems report serving Merrillville. Your water depends on which one serves your address. Check your bill if unsure.
A
Indiana American Water - Northwest
Serves 210,510 people · Surface water · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
B
Crossings Mobile Home Park
Serves 100 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 4 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
A
Rockwell Shores Apartments
Serves 45 people · Groundwater · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2024).