In recent monitoring cycles, Trenton tap water shows a mixed record for NJ — several systems have documented violations alongside areas with clean compliance histories.

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

Water Quality Map: Trenton, NJ

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 28 ZIP codes in Trenton, New Jersey, covering 2 community water systems serving approximately 239,192 people.

28 of 28 ZIP codes (100%) have recorded EPA violations. 112 health-based violations documented.

Home Safety Score

Average Home Safety Score for Trenton: C (55/100)

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

Trenton water systems draw from: Surface water.

Lead & Copper

• Average lead level (90th percentile): 0.0040 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): 27 ZIP codes
• Zone 2 (Moderate): 0 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 Trenton

• 08601 [A] — 51 violations ⚠
• 08602 [D] — 51 violations ⚠
• 08603 [D] — 51 violations ⚠
• 08604 [C] — 51 violations ⚠
• 08605 [D] — 51 violations ⚠
• 08606 [D] — 51 violations ⚠
• 08607 [D] — 51 violations ⚠
• 08608 [C] — 51 violations ⚠
• 08609 [C] — 51 violations ⚠
• 08610 [C] — 51 violations ⚠
• 08611 [C] — 51 violations ⚠
• 08618 [D] — 51 violations ⚠
• 08619 [D] — 51 violations ⚠
• 08620 [C] — 51 violations ⚠
• 08625 [D] — 51 violations ⚠
• 08628 [D] — 51 violations ⚠
• 08629 [C] — 51 violations ⚠
• 08638 [D] — 51 violations ⚠
• 08641 [D] — 51 violations ⚠
• 08644 [D] — 51 violations ⚠
• 08645 [D] — 51 violations ⚠
• 08646 [D] — 51 violations ⚠
• 08647 [D] — 51 violations ⚠
• 08650 [D] — 51 violations ⚠
• 08666 [D] — 51 violations ⚠
• 08690 [C] — 51 violations ⚠
• 08691 [C] — 51 violations ⚠
• 08695 [D] — 51 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.

How Remediation Costs Compare in Trenton

Homeowners in Trenton are working with a moderate equity share for documented remediation — the commitment deserves a line in the household budget, not dismissal.

Median Home Value

$248,900

Est. Remediation

$2,550

Remediation as % of home value 1.0%

Remediation costs are moderate relative to home values in Trenton. The estimated $1,600–$4,093 range is manageable for most homeowners but still worth budgeting for. Home values are 49% below the New Jersey average.

Trenton: Lead Risk & Vulnerable Populations

0.004

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 Trenton 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.

Trenton: Flood History & Water Damage Risk

Over the multi-decade span covered by the National Flood Insurance Program, Trenton has accumulated 1813 flood claims — a total that reflects a community where significant flooding is a recurring, documented feature of the local environment. That history has direct relevance to water quality. Each major flood event activates contamination pathways that are absent or dormant during dry conditions: treatment plants handling floodwater-saturated intake face sharply elevated contaminant loads; private wells in low-lying FEMA-designated zones — which cover 46% of local ZIP codes — can be infiltrated by surface runoff carrying bacteria, sediment, and chemical residue; distribution systems under pressure during flooding can experience backflow that draws untreated water into the supply.

1,813

Total FEMA Flood Claims

$8,274

Avg Claim Payout

46%

ZIPs in FEMA Flood Zones

~91

Est. Claims/Year

Trenton has a significant flood history with 1,813 FEMA flood insurance claims on record, averaging $8,274 per claim. With 46% 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>$2,550</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.