Jefferson, NH Water Safety: 53/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Jefferson, NH water systems: poor compliance record, lower-tier safety grade.
How Jefferson Compares
Data: EPA SDWIS Last verified: 2026-06-03
Jefferson Water: The Quick Version
- Homes built before 1986: 47% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 14.55 — above typical levels.
Water Systems Serving Jefferson
Residential addresses in Jefferson, NH are served by 2 primary water providers out of 2 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 1 ZIP code in Jefferson, New Hampshire (population ~1,001), covering 2 community water systems serving approximately 4,090 people region-wide.
No EPA violations recorded across any ZIP codes in Jefferson — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Jefferson: 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
Jefferson water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Jefferson
- 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 |
|---|---|---|---|
| 03583 | D | LANCASTER WATER DEPT | 2,450 |
All ZIP Codes in Jefferson
- 03583 [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.
CDC Health Data for Jefferson
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
How Old Is Jefferson's Housing Stock?
With 47% 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
Some cities skew heavily toward one construction era; Jefferson does not. The median build year of 1981 reflects a housing stock where older and newer homes share the market in meaningful proportions. That mixed profile means the city carries moderate aggregate plumbing-era risk — with older homes, particularly those built before 1986, representing the portion of the stock where lead-soldered joints may still be present.
Most homes in Jefferson were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Jefferson: Remediation Cost in Perspective
Within the Jefferson market, estimated remediation claims a small portion of typical property equity — the financial burden is proportionally low.
Remediation costs in Jefferson are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 15% below the New Hampshire average.
Protecting Children from Lead in Jefferson
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.
Practically, the structural drivers in Jefferson — 47% pre-rule stock and citywide monitoring at or beyond the regulatory benchmark — make an in-home draw the practical way to translate aggregate averages into the specific conditions at one address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Jefferson
- 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 47% 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 Jefferson, NH