Gilmanton Iron Works, NH Water Safety: 53/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-04
Although conditions vary by service area, Gilmanton Iron Works's water systems collectively show below-average compliance within NH — health-based violations are documented throughout the city, and the overall grade reflects a pattern rather than isolated incidents.
How Gilmanton Iron Works Compares
Data: EPA SDWIS Last verified: 2026-06-04
Key Facts for Gilmanton Iron Works Residents
- Homes built before 1986: 55% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 12.77 — above typical levels.
Gilmanton Iron Works's Water Providers
Federal drinking water records identify 1 system operating in Gilmanton Iron Works, NH. One of those systems serves the overwhelming majority of residential addresses, concentrating infrastructure management, rate authority, and EPA compliance reporting within a single organization.
Overview
We track water quality and home safety data for 1 ZIP code in Gilmanton Iron Works, New Hampshire, covering 1 community water system serving approximately 1,684 people.
No EPA violations recorded across any ZIP codes in Gilmanton Iron Works — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Gilmanton Iron Works: D (53/100)
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
Gilmanton Iron Works water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Gilmanton Iron Works
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 03837 | D | ALTON WATER WORKS | 1,800 |
All ZIP Codes in Gilmanton Iron Works
- 03837 [D]
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.
Gilmanton Iron Works 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
Gilmanton Iron Works Infrastructure Age
With 55% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Because the majority of Gilmanton Iron Works's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1987 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in Gilmanton Iron Works were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Gilmanton Iron Works
While no remediation project is entirely without cost, the relationship between estimated remediation and property values in Gilmanton Iron Works is notably favorable — the equity share is small enough that the household financial perspective is one of proportionality rather than pressure, and most homeowners can treat it as routine planning rather than a significant financial event.
Remediation costs in Gilmanton Iron Works are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 0% above the New Hampshire average.
Gilmanton Iron Works: 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.
After the federal action removing lead-bearing solder from new plumbing took effect, building practice shifted — but 55% of the Gilmanton Iron Works inventory predates that line. With aggregate samples near or beyond 0.015 mg/L, an in-home check moves out of the optional column into the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Gilmanton Iron Works
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 55% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Gilmanton Iron Works, NH