State safety rankings put Indianapolis, IN near the lower tier — below-average compliance on record.

Data: EPA SDWIS Last verified: 2026-06-03

Water Quality Map: Indianapolis, IN

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Overview

We track water quality and home safety data for 63 ZIP codes in Indianapolis, Indiana, covering 11 community water systems serving approximately 978,823 people.

63 of 63 ZIP codes (100%) have recorded EPA violations. 315 health-based violations documented.

Home Safety Score

Average Home Safety Score for Indianapolis: D (49/100)

The score combines three factors:

Factor	What It Measures
Water Quality	EPA violations and compliance history
Lead Levels	90th percentile lead concentration vs EPA action level
Radon Risk	EPA radon zone classification

Water Sources

Indianapolis water systems draw from: Groundwater, Surface water.

Lead & Copper

• Average lead level (90th percentile): 0.0052 mg/L (EPA action level: 0.015 mg/L)
• 0 ZIP codes exceed the EPA lead action level

Radon Risk

Dominant radon zone: Zone 1 (High Risk)

• Zone 1 (High): 63 ZIP codes
• Zone 2 (Moderate): 0 ZIP codes
• Zone 3 (Low): 0 ZIP codes

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

Top Contaminants

Areas with Most Violations

All ZIP Codes in Indianapolis

• 46201 [D] — 26 violations ⚠
• 46202 [C] — 26 violations ⚠
• 46203 [D] — 26 violations ⚠
• 46204 [C] — 26 violations ⚠
• 46205 [D] — 26 violations ⚠
• 46206 [C] — 26 violations ⚠
• 46207 [D] — 26 violations ⚠
• 46208 [D] — 26 violations ⚠
• 46209 [D] — 26 violations ⚠
• 46211 [D] — 26 violations ⚠
• 46213 [D] — 26 violations ⚠
• 46214 [D] — 26 violations ⚠
• 46216 [D] — 26 violations ⚠
• 46217 [D] — 26 violations ⚠
• 46218 [D] — 26 violations ⚠
• 46219 [D] — 26 violations ⚠
• 46220 [D] — 26 violations ⚠
• 46221 [D] — 26 violations ⚠
• 46222 [D] — 26 violations ⚠
• 46223 [D] — 26 violations ⚠
• 46224 [D] — 26 violations ⚠
• 46225 [D] — 26 violations ⚠
• 46226 [D] — 26 violations ⚠
• 46227 [D] — 26 violations ⚠
• 46228 [D] — 26 violations ⚠
• 46229 [D] — 26 violations ⚠
• 46230 [D] — 26 violations ⚠
• 46231 [C] — 26 violations ⚠
• 46234 [D] — 26 violations ⚠
• 46235 [C] — 26 violations ⚠
• 46236 [C] — 26 violations ⚠
• 46237 [D] — 26 violations ⚠
• 46239 [C] — 26 violations ⚠
• 46240 [D] — 26 violations ⚠
• 46241 [D] — 26 violations ⚠
• 46242 [D] — 26 violations ⚠
• 46244 [D] — 26 violations ⚠
• 46247 [D] — 26 violations ⚠
• 46249 [D] — 26 violations ⚠
• 46250 [D] — 26 violations ⚠
• 46251 [D] — 26 violations ⚠
• 46253 [D] — 26 violations ⚠
• 46254 [C] — 26 violations ⚠
• 46255 [D] — 26 violations ⚠
• 46256 [D] — 26 violations ⚠
• 46259 [D] — 26 violations ⚠
• 46260 [D] — 26 violations ⚠
• 46262 [D] — 26 violations ⚠
• 46266 [D] — 26 violations ⚠
• 46268 [D] — 26 violations ⚠
• 46274 [D] — 26 violations ⚠
• 46275 [D] — 26 violations ⚠
• 46277 [D] — 26 violations ⚠
• 46278 [C] — 26 violations ⚠
• 46280 [D] — 26 violations ⚠
• 46282 [D] — 26 violations ⚠
• 46283 [D] — 26 violations ⚠
• 46285 [D] — 26 violations ⚠
• 46290 [C] — 26 violations ⚠
• 46291 [D] — 26 violations ⚠
• 46295 [D] — 26 violations ⚠
• 46296 [D] — 26 violations ⚠
• 46298 [D] — 26 violations ⚠

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Lead/copper: EPA Lead and Copper Rule sampling data
• Radon: EPA Map of Radon Zones

Updated daily.

Cost Context: What Remediation Means for Indianapolis Homeowners

At current valuations, Indianapolis falls in the moderate remediation-share tier — a level where treating this as a budgeted line item rather than an ad-hoc expense is the practical approach.

Median Home Value

$216,300

Est. Remediation

$2,890

Remediation as % of home value 1.3%

Remediation costs are moderate relative to home values in Indianapolis. The estimated $1,808–$4,656 range is manageable for most homeowners but still worth budgeting for. Home values are 21% above the Indiana average.

Lead Exposure Risk for Children in Indianapolis

0.0052

mg/L Avg Lead (Limit: 0.015)

Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

Lead risk in Indianapolis appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Flood & Climate Risk in Indianapolis

A claim count of 2204 in the NFIP database — alongside 59% of ZIP codes in FEMA-designated flood zones — points to something data alone can only partly convey: a community that has repeatedly dealt with the full consequences of significant flooding. Treatment plants overwhelmed by floodwater, private wells compromised by surface infiltration, and distribution systems stressed by pressure events are all downstream effects of the flood history Indianapolis's NFIP record documents.

2,204

Total FEMA Flood Claims

$10,064

Avg Claim Payout

59%

ZIPs in FEMA Flood Zones

~110

Est. Claims/Year

Indianapolis has a significant flood history with 2,204 FEMA flood insurance claims on record, averaging $10,064 per claim. With 59% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,890</strong> remediation cost per household.

Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.

Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.