ZIP Code 46274 Water Quality & Testing Report
Indianapolis, IN · Marion County County · Updated for 2026
Is Tap Water Safe to Drink in ZIP 46274 (Indianapolis, IN)?
Caution / Filtration Recommended: Tap water in ZIP code 46274 (Indianapolis, IN) has compliance concerns, earning an EPA Safety Grade of D (48/100) due to 5 health violation(s) and 5.2 ppb lead. While treated by Citizens Water - Indianapolis, residents are advised to use an NSF/ANSI 53 certified water filter for drinking and cooking.
Water Safety Grade
Poor — Multiple violations recorded
Health Violations
5
Total Violations
26
Lead Risk
N/A
Contaminants
3
Active Water Quality Issues Detected
EPA records show 9 unresolved violations. Contact Citizens Water - Indianapolis for current status.
About Tap Water in ZIP Code 46274
Tap water in ZIP code 46274 (Indianapolis, IN) is distributed by Citizens Water - Indianapolis (EPA ID: IN5249004), serving approximately 880,345 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of D with a composite quality score of 48/100.
Water System
Citizens Water - Indianapolis
EPA ID: IN5249004
Water Source
Surface Water
Population Served
880,345 residents
County
Marion County County, Indiana
Lead Levels in ZIP 46274
EPA action level: 15 ppb | Public health goal: 0 ppb
Lead Level: 5.2 ppb — Moderate
EPA action level: 1.3 mg/L
From annual CCR filing
From annual CCR filing
Water Hardness & Mineral Content
Grains per gallon (GPG) & Parts per million (PPM / mg/L)
Water in ZIP 46274 is Very Hard (197 mg/L / 11.5 GPG). High concentrations of dissolved limestone minerals cause severe mineral buildup, stiff laundry, dry skin, and premature water heater wear.
Grains per gallon
Parts per million CaCO3
Official EPA SDWIS Database Entry
Utility: Citizens Water - Indianapolis · PWSID: IN5249004
Violation History
Past 5 years — EPA SDWIS data
Citizens Water - Indianapolis has recorded 5 health-based violations out of 26 total violations over the past 5 years. 9 violations remain unresolved in EPA tracking records.
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 3 contaminants with health-based violations in the past 5 years: Consumer Confidence Report Rule, Stage 2 DBP Rule, Haloacetic Acids (HAA5).
From Consumer Confidence Report:
Chloramines (Total Chlorine) (2.9 ppm); Total Trihalomethanes (TTHMs) (58 ppb); Haloacetic Acids (HAA5) (42 ppb); Chloride (215 ppm); pH (8.5 Standard Units)
⚖ Enforcement Actions
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.
Highest potential
EPA Radon Zone 1 — highest potential for radon in indoor air. Homeowners should test their home for radon and consider mitigation if levels exceed 4 pCi/L.
Water Quality Testing in ZIP 46274
Tap Water & Well Testing Recommendations
Residents in ZIP code 46274 served by Citizens Water - Indianapolis 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.
🛡 What Should You Do? — ZIP 46274 Recommendations
Serious water quality concerns — action recommended
- 🚨 Install a certified NSF/ANSI 53 or 58 (reverse osmosis) filter immediately for drinking and cooking
- 🚨 Do not give unfiltered water to children, pregnant women, or immunocompromised individuals
- 🚨 Contact Citizens Water - Indianapolis to request the current violation status and corrective action plan
- 🚨 Report concerns to your state environmental agency or call the EPA hotline: 1-800-426-4791
- 🚨 Consider having your home's tap water independently tested by a certified lab
Recommended Water Treatment Systems:
NSF 53 Lead Pitcher Filter
Certified to remove lead. Recommended for immediate protection.
NSF 58 Under-Sink RO System
Reverse Osmosis system certified to remove PFAS, heavy metals, and viruses.
Frequently Asked Questions — ZIP 46274 Water Quality
Is tap water safe to drink in ZIP code 46274?+
How do I get my water tested in ZIP 46274 (Indianapolis, IN)?+
How hard is the tap water in 46274?+
Should I test private well water in 46274?+
What is the lead level in 46274 tap water?+
Is there an active boil water notice in 46274?+
Who provides tap water to 46274?+
What water filter should I use in 46274?+
Data Sources & Methodology
Water quality data for ZIP code 46274 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 Citizens Water - Indianapolis. 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 →