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

ZIP Code 47812 Water Quality & Testing Report

Terre Haute, IN · Vigo County County · Updated for 2026

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 47812 (Terre Haute, IN)?

Yes, tap water in ZIP code 47812 (Terre Haute, IN) is safe to drink under EPA Safe Drinking Water Act standards. Supplied by Indiana American Water - Terre Haute, the area earns an EPA Safety Grade of B (77/100) with 2 health violations, 2.0 ppb lead, and very hard (240 mg/L / 14 GPG) water.

Safety Score
B

Water Safety Grade

Good — Minor issues on record

Health Violations

2

Total Violations

9

Lead Risk

N/A

Contaminants

2

⚠

Active Water Quality Issues Detected

EPA records show 5 unresolved violations. Contact Indiana American Water - Terre Haute for current status.

About Tap Water in ZIP Code 47812

Tap water in ZIP code 47812 (Terre Haute, IN) is distributed by Indiana American Water - Terre Haute (EPA ID: IN5284012), serving approximately 67,765 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 77/100.

Water System

Indiana American Water - Terre Haute

EPA ID: IN5284012

Water Source

Ground Water

Population Served

67,765 residents

County

Vigo County County, Indiana

🧪

Lead Levels in ZIP 47812

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

Lead Level: 2.0 ppb — Very Low

The 90th percentile lead level in 47812 is 2.0 ppb. This meets the EPA action level of 15 ppb. Health experts recommend a target of 0 ppb for optimal safety.
Lead Level (90th percentile)
2.00 ppb (0.002 mg/L)
Lead (Consumer Confidence Report)

From annual CCR filing

2 ppb
Lead Exposure Risk Rating
Unknown
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 Hard14 GPG · 240 mg/L

Water in ZIP 47812 is Very Hard (240 mg/L / 14 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

14 GPG
Hardness (PPM / mg/L)

Parts per million CaCO3

240 mg/L
Appliance Scaling Risk
High / Severe

Official EPA SDWIS Database Entry

Utility: Indiana American Water - Terre Haute · PWSID: IN5284012

Verify on EPA.gov
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Violation History

Past 5 years — EPA SDWIS data

Indiana American Water - Terre Haute has recorded 2 health-based violations out of 9 total violations over the past 5 years. 5 violations remain unresolved in EPA tracking records.

Total Violations (5 yr)
9
Health-Based Violations
2
Unresolved Violations
5
Boil Water Advisories
0
Compliance Risk
Critical

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

⚗️

Contaminants Detected

Contaminants with health-based violations on record

EPA records identify 2 contaminants with health-based violations in the past 5 years: Stage 2 DBP Rule, Consumer Confidence Report Rule.

Stage 2 DBP RuleConsumer Confidence Report Rule

⚖ Enforcement Actions

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

Ground Water

This system draws water from underground aquifers. Groundwater is naturally filtered through soil and rock, but can still contain naturally occurring minerals like arsenic, radium, or nitrates.

Water Source Type
Ground Water
CCR Source Classification
Ground Water
EPA Radon Zone

Moderate potential

Zone 2

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

Water Quality Testing in ZIP 47812

Tap Water & Well Testing Recommendations

Residents in ZIP code 47812 served by Indiana American Water - Terre Haute 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 47812 Recommendations

  • ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
  • ✓ Request your annual Consumer Confidence Report from Indiana American Water - Terre Haute
  • ✓ 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 47812 Water Quality

Is tap water safe to drink in ZIP code 47812?+
Yes — tap water in 47812 (Terre Haute, 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 47812 (Terre Haute, IN)?+
To test water quality in ZIP 47812, 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 47812?+
Tap water in 47812 is classified as Very Hard with an estimated mineral hardness of 240 mg/L (14 GPG). A whole-home water softener system is strongly recommended to protect plumbing and home appliances.
Should I test private well water in 47812?+
Yes. Unlike municipal systems, private wells in 47812 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 47812 tap water?+
The 90th percentile lead level in 47812 is 2.0 ppb. The EPA action level is 15 ppb. This is below the EPA action level.
Is there an active boil water notice in 47812?+
There are currently no active boil water advisories on record for 47812. Water treatment systems are operating within normal parameters.
Who provides tap water to 47812?+
Tap water in ZIP code 47812 is provided by Indiana American Water - Terre Haute (EPA ID: IN5284012), serving approximately 67,765 residents.
What water filter should I use in 47812?+
Based on water metrics for 47812, we recommend Reverse Osmosis (PFAS & Lead). Look for certifications such as NSF/ANSI 53 (Chemical Contaminants), NSF/ANSI 42 (Aesthetic Effects).

Data Sources & Methodology

Water quality data for ZIP code 47812 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 Indiana American Water - Terre Haute. 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 →