Dover, NH: 3 Violations — 81/100 (2026)
3 ZIP codes · 5 water systems · Updated 2026-06-03
Water utilities in Dover have maintained a consistent compliance record over recent monitoring periods — the city's above-average grade in NH reflects low violation rates and no systemic health concerns flagged in current data.
How Dover Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Dover Residents
- Your city's water systems recorded 3 violations in the past 5 years.
- Average lead level: 0.001 mg/L.
- Estimated remediation: $1,400 per household.
- CDC health risk index: 11.41.
Dover's Water Providers
3 water utilities share the residential service territory in Dover, NH — out of 5 total systems in federal records.
Overview
We track water quality and home safety data for 3 ZIP codes in Dover, New Hampshire (population ~33,150), covering 5 community water systems serving approximately 62,346 people region-wide.
3 of 3 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Dover: B (81/100)
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
Dover water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0010 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): 3 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 4 | 3 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 03820 | B | 1 | 0 | Dover Water Department |
| 03821 | B | 1 | 0 | Dover Water Department |
| 03822 | B | 1 | 0 | Dover Water Department |
All ZIP Codes in Dover
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.
Dover Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Dover's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Dover
In Dover, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.
Remediation costs in Dover are relatively low compared to home values. The $667–$2,233 estimated range is a small fraction of median property value. Home values are 9% above the New Hampshire average.
Dover: Lead Risk & Vulnerable Populations
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 Dover 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.
Dover: Flood History & Water Damage Risk
Dover's flood exposure sits in the moderate range: 45 NFIP claims on record and 67% of ZIP codes within FEMA-designated flood zones. Residents with private wells or older infrastructure have reasonable grounds to factor flood timing into their water quality awareness.
Dover has a moderate flood history with 45 FEMA claims averaging $28,465 per payout. 67% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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>$1,400</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.
Deep Dive Reports
Detailed analysis for Dover, NH