Grafton, NH Water Safety: 53/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Grafton, NH: water systems collectively below average — violations documented.
How Grafton Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Grafton Water
- Homes built before 1986: 63% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 11.38.
Who Supplies Your Water in Grafton
Water service in Grafton, NH is organized around a single utility — one of 1 tracked by regulator, and the one that manages the local distribution network while holding primary responsibility for EPA compliance reporting.
Overview
We track water quality and home safety data for 1 ZIP code in Grafton, New Hampshire, covering 1 community water system serving approximately 1,248 people.
No EPA violations recorded across any ZIP codes in Grafton — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Grafton: 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
Grafton water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Grafton
- 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 |
|---|---|---|---|
| 03240 | D | CANAAN WATER DEPT | 684 |
All ZIP Codes in Grafton
- 03240 [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.
Health Outcomes in Grafton
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
Housing & Infrastructure in Grafton
With 63% 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
The character of Grafton's housing stock is one of deep historical layering — a median build year of 1970 signals a city built largely before the plumbing era changes of 1986 and 1970. Lead-soldered copper joints and, in the oldest properties, lead service lines are commonly present in this inventory. That context shapes what individual water testing may reveal, particularly in neighborhoods where the oldest housing is concentrated.
Over half of homes in Grafton 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.
Cost Context: What Remediation Means for Grafton Homeowners
The household financial picture for Grafton 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.
Remediation costs in Grafton are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 30% below the New Hampshire average.
Lead Exposure Risk for Children in Grafton
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.
In recent monitoring under the Lead and Copper Rule, citywide samples for Grafton have approached or crossed the regulatory action level on multiple occasions. Combined with 63% of stock dating from the pre-rule era, the picture supports baseline single-tap reads as a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Grafton
- 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 63% 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 Grafton, NH