For most households in Miami, FL tap water is adequate — the middle-tier grade reflects gaps in specific service areas.

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

Water Quality Map: Miami, FL

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 96 ZIP codes in Miami, Florida (population ~1,849,309), covering 9 community water systems serving approximately 2,859,735 people region-wide.

96 of 96 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.

Home Safety Score

Average Home Safety Score for Miami: C (59/100)

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

Miami water systems draw from: Groundwater.

Lead & Copper

• Average lead level (90th percentile): 0.0031 mg/L (EPA action level: 0.015 mg/L)
• 0 ZIP codes exceed the EPA lead action level

Radon Risk

Dominant radon zone: Zone 2 (Moderate Risk)

• Zone 1 (High): 0 ZIP codes
• Zone 2 (Moderate): 95 ZIP codes
• Zone 3 (Low): 1 ZIP code

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

Top Contaminants

Areas with Most Violations

All ZIP Codes in Miami

• 33101 [C] — 56 violations
• 33102 [B] — 56 violations
• 33106 [C] — 56 violations
• 33110 [C] — 56 violations
• 33111 [C] — 56 violations
• 33112 [C] — 56 violations
• 33116 [C] — 56 violations
• 33122 [C] — 56 violations
• 33124 [C] — 56 violations
• 33125 [D] — 56 violations
• 33126 [D] — 56 violations
• 33127 [C] — 56 violations
• 33128 [C] — 56 violations
• 33129 [C] — 56 violations
• 33130 [C] — 56 violations
• 33131 [C] — 56 violations
• 33132 [C] — 56 violations
• 33133 [D] — 56 violations
• 33134 [C] — 56 violations
• 33135 [C] — 56 violations
• 33136 [C] — 56 violations
• 33137 [D] — 56 violations
• 33138 [D] — 56 violations
• 33142 [D] — 56 violations
• 33143 [D] — 56 violations
• 33144 [D] — 56 violations
• 33145 [C] — 56 violations
• 33146 [C] — 56 violations
• 33147 [D] — 56 violations
• 33150 [D] — 56 violations
• 33151 [C] — 56 violations
• 33152 [C] — 56 violations
• 33153 [C] — 56 violations
• 33155 [D] — 56 violations
• 33156 [D] — 56 violations
• 33157 [D] — 56 violations
• 33158 [D] — 56 violations
• 33159 [C] — 56 violations
• 33161 [D] — 56 violations
• 33162 [D] — 56 violations
• 33163 [C] — 56 violations
• 33164 [C] — 56 violations
• 33165 [D] — 56 violations
• 33166 [D] — 56 violations
• 33167 [D] — 56 violations
• 33168 [D] — 56 violations
• 33169 [D] — 56 violations
• 33170 [D] — 56 violations
• 33172 [D] — 56 violations
• 33173 [D] — 56 violations
• 33174 [D] — 56 violations
• 33175 [D] — 56 violations
• 33176 [D] — 56 violations
• 33177 [D] — 56 violations
• 33178 [D] — 56 violations
• 33179 [D] — 56 violations
• 33180 [D] — 56 violations
• 33181 [D] — 56 violations
• 33182 [D] — 56 violations
• 33183 [D] — 56 violations
• 33184 [D] — 56 violations
• 33185 [D] — 56 violations
• 33186 [D] — 56 violations
• 33187 [D] — 56 violations
• 33188 [C] — 56 violations
• 33189 [D] — 56 violations
• 33190 [C] — 56 violations
• 33191 [C] — 56 violations
• 33192 [C] — 56 violations
• 33193 [D] — 56 violations
• 33194 [C] — 56 violations
• 33196 [D] — 56 violations
• 33197 [C] — 56 violations
• 33198 [C] — 56 violations
• 33199 [C] — 56 violations
• 33206 [C] — 56 violations
• 33222 [C] — 56 violations
• 33231 [C] — 56 violations
• 33233 [C] — 56 violations
• 33234 [C] — 56 violations
• 33238 [C] — 56 violations
• 33242 [C] — 56 violations
• 33243 [C] — 56 violations
• 33245 [C] — 56 violations
• 33247 [C] — 56 violations
• 33255 [C] — 56 violations
• 33256 [C] — 56 violations
• 33257 [C] — 56 violations
• 33261 [C] — 56 violations
• 33265 [C] — 56 violations
• 33266 [C] — 56 violations
• 33269 [C] — 56 violations
• 33280 [C] — 56 violations
• 33283 [C] — 56 violations
• 33296 [C] — 56 violations
• 33299 [C] — 56 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 Miami Homeowners

The household financial picture for Miami homeowners is proportionally favorable — addressing documented issues claims a small slice of equity, and the cost-to-value ratio puts this area well within the manageable tier.

Median Home Value

$457,300

Est. Remediation

$1,752

Remediation as % of home value 0.4%

Remediation costs in Miami are relatively low compared to home values. The $904–$2,732 estimated range is a small fraction of median property value. Home values are 35% above the Florida average.

Lead Exposure Risk for Children in Miami

0.0031

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 Miami 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 Miami

Substantially more flood exposure than most communities appears in Miami's NFIP record — 44069 documented claims and 69% of ZIP codes in FEMA flood zones. That exposure level makes the water-quality implications of flooding an active planning consideration rather than a background one.

44,069

Total FEMA Flood Claims

$16,329

Avg Claim Payout

69%

ZIPs in FEMA Flood Zones

~2203

Est. Claims/Year

Miami has a significant flood history with 44,069 FEMA flood insurance claims on record, averaging $16,329 per claim. With 69% 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>$1,752</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.