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Official EPA SDWIS Verified ReportWater Quality & Testing GuideHistorical Record: No Recorded SDWIS Violations

ZIP Code 46312 Water Quality & Testing Report

East Chicago, IN · Lake County County · Updated for 2026

Sahajul HaqueCompiled & verified by Sahajul Haque from official EPA SDWIS records
Public Health & Medical Notice: Drinking water quality data on this page reflects historical compliance records submitted under the Safe Drinking Water Act. This information does not constitute medical advice or a real-time safety guarantee. If you are pregnant, nursing, preparing infant formula, or immunocompromised, consult a healthcare provider. Boiling water kills biological pathogens, but does NOT remove chemical contaminants like lead, arsenic, or PFAS.
Quick EPA Verified Answer

Is Tap Water Safe to Drink in ZIP 46312 (East Chicago, IN)?

Yes, tap water in ZIP code 46312 (East Chicago, IN) is safe to drink under EPA Safe Drinking Water Act standards. Supplied by East Chicago Water Works, the area earns an EPA Safety Grade of B (70/100) with 0 health violations, 8.0 ppb lead, and very hard (190 mg/L / 11.1 GPG) water.

Safety Score
B

Water Safety Grade

Good — Minor issues on record

Health Violations

0

Total Violations

7

Lead Risk

Very High

Contaminants

0

About Tap Water in ZIP Code 46312

Tap water in ZIP code 46312 (East Chicago, IN) is distributed by East Chicago Water Works (EPA ID: IN5245012), serving approximately 26,370 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of B with a composite quality score of 70/100.

Water System

East Chicago Water Works

EPA ID: IN5245012

Water Source

Surface Water

Population Served

26,370 residents

County

Lake County County, Indiana

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Lead Levels in ZIP 46312

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 8.0 ppb — Moderate

The 90th percentile lead level in 46312 is 8.0 ppb. This is below the EPA action level of 15 ppb, but above ideal health goals. Consider a certified lead-reducing filter.

Lead exposure risk in 46312 is rated Very High. EPA models estimate a 77% exposure probability based on housing and infrastructure age.

Lead Level (90th percentile)
8.00 ppb (0.008 mg/L)
Lead Exposure Risk Rating
Very High
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

77%
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Water Hardness & Mineral Content

Grains per gallon (GPG) & Parts per million (PPM / mg/L)

Classification: Very Hard11.1 GPG · 190 mg/L

Water in ZIP 46312 is Very Hard (190 mg/L / 11.1 GPG). High concentrations of dissolved limestone minerals cause severe mineral buildup, stiff laundry, dry skin, and premature water heater wear.

Recommendation: A whole-home water softener system is strongly recommended to protect plumbing and home appliances.
Hardness (GPG)

Grains per gallon

11.1 GPG
Hardness (PPM / mg/L)

Parts per million CaCO3

190 mg/L
Appliance Scaling Risk
High / Severe

Official EPA SDWIS Database Entry

Utility: East Chicago Water Works · PWSID: IN5245012

Verify on EPA.gov
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Violation History

Past 5 years — EPA SDWIS data

East Chicago Water Works has recorded 7 violations, but none are health-based (e.g., administrative or monitoring infractions). 2 violations remain unresolved in EPA tracking records.

Total Violations (5 yr)
7
Health-Based Violations
0
Unresolved Violations
2
Boil Water Advisories
0
Compliance Risk
Moderate

Regulatory compliance risk for this utility is rated Moderate based on past reporting and enforcement records.

⚗️

Contaminants Detected

Contaminants with health-based violations on record

No health-based contaminant violations are on record for ZIP code 46312 under the Safe Drinking Water Act.

⚖ Enforcement Actions

EPA or state regulators have issued 10 enforcement actions to address compliance lapses.
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Water Source & Environmental Factors

Surface Water

This system draws water from lakes, rivers, or reservoirs. Surface water is treated to remove sediment, microorganisms, and chemical contaminants before reaching taps.

Water Source Type
Surface Water
EPA Radon Zone

Moderate potential

Zone 2
Annual Flood Risk Cost

Estimated annual flood-related costs per property

$0
Energy Burden

% of household income spent on energy — indicator of older infrastructure

3.38%

EPA Radon Zone 2 — moderate radon potential. The EPA recommends testing your home regardless of zone designation.

Water Quality Testing in ZIP 46312

Tap Water & Well Testing Recommendations

Residents in ZIP code 46312 served by East Chicago Water Works can test tap water or private well systems to verify water purity. Testing detects hidden contaminants before they impact family health.

Tap Water Testing Steps

  • 1.Conduct a certified lead check if your home was constructed before 1986.
  • 2.Use certified lab testing kits rather than uncalibrated test strips for regulated compliance.
  • 3.Sample water from both your kitchen faucet and water heater to compare line purity.

Private Well Testing Steps

  • •Test for Coliform bacteria and Nitrates annually.
  • •Test for heavy metals, radon, and PFAS every 3 years.
  • •Send samples to a state-certified drinking water laboratory recognized by Indiana Department of Environmental Management.
Certified Lab Testing: Always use an EPA-certified drinking water laboratory in IN for formal legal or real estate compliance testing.

🛡 What Should You Do? — ZIP 46312 Recommendations

  • ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
  • ✓ Request your annual Consumer Confidence Report from East Chicago Water Works
  • ✓ If your home was built before 1986, consider testing your own tap for lead
  • ✓ Use a pitcher filter (NSF/ANSI 42 certified) for improved taste

Recommended Taste & Safety Filter:

🚰

NSF/ANSI 53 Certified Pitcher Filter

Best for removing aesthetic chlorine, odors, and low-level heavy metals.

Filter Selection Guide →

Frequently Asked Questions — ZIP 46312 Water Quality

Is tap water safe to drink in ZIP code 46312?+
Yes — tap water in 46312 (East Chicago, IN) meets EPA standards with a water safety grade of B. No health-based violations are on record in the past 5 years.
How do I get my water tested in ZIP 46312 (East Chicago, IN)?+
To test water quality in ZIP 46312, you can order a certified drinking water test kit or send water samples to an EPA/NELAP certified laboratory in IN. Certified testing checks for lead, coliform bacteria, nitrates, hardness, and PFAS that standard test strips miss. Contact Indiana Department of Environmental Management for a list of certified regional labs.
How hard is the tap water in 46312?+
Tap water in 46312 is classified as Very Hard with an estimated mineral hardness of 190 mg/L (11.1 GPG). A whole-home water softener system is strongly recommended to protect plumbing and home appliances.
Should I test private well water in 46312?+
Yes. Unlike municipal systems, private wells in 46312 are not regulated by the EPA or local utilities. Private well owners should test their water annually for coliform bacteria and nitrates, and every 3 to 5 years for heavy metals (lead, arsenic) and volatile organic compounds.
What is the lead level in 46312 tap water?+
The 90th percentile lead level in 46312 is 8.0 ppb. The EPA action level is 15 ppb. This is below the EPA action level.
Is there an active boil water notice in 46312?+
There are currently no active boil water advisories on record for 46312. Water treatment systems are operating within normal parameters.
Who provides tap water to 46312?+
Tap water in ZIP code 46312 is provided by East Chicago Water Works (EPA ID: IN5245012), serving approximately 26,370 residents.
What water filter should I use in 46312?+
Based on water metrics for 46312, we recommend Lead & Microplastic Filter. Look for certifications such as NSF/ANSI 53 (Lead Reduction), NSF/ANSI 42 (Particulate/Taste).

Data Sources & Methodology

Water quality data for ZIP code 46312 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by East Chicago Water Works. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →