Manchester, NH: 27 Health Violations — 78/100 (2026)
9 ZIP codes · 5 water systems · Updated 2026-06-03
Compared to statewide averages in NH, Manchester scores well — health violations are below the norm and systems generally operate within federal standards.
How Manchester Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Manchester, NH
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Manchester's 9 ZIP codes.
Key Facts for Manchester Residents
- Your city's water systems recorded 81 violations in the past 5 years.
- Average lead level: 0.001 mg/L.
- Estimated remediation: $1,944 per household.
- CDC health risk index: 11.54.
Manchester's Water Providers
Residential addresses in Manchester, NH are served by 3 primary water providers out of 5 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 9 ZIP codes in Manchester, New Hampshire, covering 5 community water systems serving approximately 119,954 people.
9 of 9 ZIP codes (100%) have recorded EPA violations. 27 health-based violations documented.
Home Safety Score
Average Home Safety Score for Manchester: B (78/100)
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
Manchester water systems draw from: Groundwater, Surface water.
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): 9 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 |
|---|---|---|---|
| Lead and Copper Rule | Treatment Technique | 20 | 9 |
| Consumer Confidence Report Rule | Reporting | 20 | 9 |
| Barium | Inorganic | 10 | 9 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 10 | 9 |
| Stage 1 DBP Rule | Treatment Technique | 10 | 9 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 03101 | B | 9 | 3 | Manchester Water Works |
| 03102 | B | 9 | 3 | Manchester Water Works |
| 03103 | B | 9 | 3 | Manchester Water Works |
| 03104 | B | 9 | 3 | Manchester Water Works |
| 03105 | B | 9 | 3 | Manchester Water Works |
| 03107 | B | 9 | 3 | Manchester Water Works |
| 03108 | B | 9 | 3 | Manchester Water Works |
| 03109 | B | 9 | 3 | Manchester Water Works |
| 03111 | B | 9 | 3 | Manchester Water Works |
All ZIP Codes in Manchester
- 03101 [B] — 9 violations ⚠
- 03102 [B] — 9 violations ⚠
- 03103 [B] — 9 violations ⚠
- 03104 [B] — 9 violations ⚠
- 03105 [B] — 9 violations ⚠
- 03107 [B] — 9 violations ⚠
- 03108 [B] — 9 violations ⚠
- 03109 [B] — 9 violations ⚠
- 03111 [B] — 9 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.
Manchester 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 Manchester's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Manchester
In Manchester, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.
Remediation costs in Manchester are relatively low compared to home values. The $944–$3,722 estimated range is a small fraction of median property value. Home values are 4% below the New Hampshire average.
Manchester: 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 Manchester 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.
Manchester: Flood History & Water Damage Risk
Flood exposure in Manchester is meaningful by NFIP measures — 69 claims on record and 56% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Manchester has a moderate flood history with 69 FEMA claims averaging $30,308 per payout. 56% 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>$1,944</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 Manchester, NH