If Your Water Has a Chlorine Taste or Smell, But No Other Symptoms, Consider This
Sometimes residents detect a chlorine-like taste or odor in water supplied by Indiana American Water - Northwest, serving Gary, Merrillville, and nearby Lake County areas. It is common to mistake these sensory impressions as urgent health warnings. However, government records show this public system has no health-based violations for chlorine or any other contaminants. A chlorine presence is part of the water treatment process to ensure microbial safety but can affect taste or smell.
If your household experiences only taste or smell issues without skin irritation, staining, or plumbing corrosion, chlorine is a likely cause, but it is not necessarily harmful at these detected levels.
If Comparing Lake County to Neighboring Counties, Watch for Over-Interpretation
Water quality data from Indiana American Water - Northwest is specific to its service area of over 210,000 people through more than 84,000 connections. Neighboring counties may have different water sources, disinfection methods, or treatment processes, so their chlorine reports do not directly represent your home's water. Avoid assuming your water's chlorine concentration is the same as the system average or neighboring systems' figures without individual testing.
If Your Home Plumbing Is Older or Made of Certain Materials, Consider Their Role Separately
Chlorine levels reported by the water utility reflect the treated water supply, not changes caused by your home's pipes or fixtures. Older plumbing or certain materials can interact with disinfectants and influence taste or cause discoloration, but these effects are distinct from source water conditions. Testing your tap water specifically can distinguish system-supplied chlorine from plumbing-related impacts.
If You Choose to Use a Treatment, Here's How Water Changes at the Tap with the Autotrol System
The Autotrol Chlorine Taste & Smell Filter ships ready to configure for residential use. It is designed to reduce chlorine's taste and odor efficiently once set up on your water line. This can improve drinking water quality and household water experience without altering other water safety aspects. Using this technology targets chlorine specifically, helping households seeking to address chlorine-related aesthetic concerns documented in system records.
If You See Chlorine Levels Below Aesthetic Secondary Standards, Understand Their Meaning
Government monitoring applies secondary standards for chlorine concentration to address taste, odor, and staining potential, separate from health-based limits. In Lake County's public water system record, chlorine is managed to comply with such standards, ensuring water is safe to drink while minimizing sensory effects. Exceeding a secondary standard is not a legal violation or health risk but may warrant treatment for those sensitive to taste or smell.
In summary, the municipal water provided by Indiana American Water - Northwest to Gary, Merrillville, and Lake County shows no health-based violations related to chlorine. Residents noticing chlorine taste or smell should consider testing their tap water to confirm individual conditions and decide on treatment needs accordingly. For more details, see the EPA Safe Drinking Water Information System (SDWIS) public record for system IN5245015.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2024-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for INDIANA AMERICAN WATER - NORTHWEST (IN5245015), surface water supply, serving 210510 people: 0 health-based violations of 0 total; lead 90th percentile 0.003 mg/L
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