Merrimack, NH: PFAS Found in Water - Home Safety 75/100
1 ZIP code · 2 water systems · Updated
ZipCheckup grade for Merrimack: B.
This ZIP looks solid, with a few items worth a quick check.
Looking at federal monitoring data for Merrimack, NH: the city clears benchmarks set under the Safe Drinking Water Act with room to spare - recorded exceedances are rare, and the systems serving local households have not triggered any pattern of repeat deficiencies in recent cycles.
How Merrimack Compares
Data: EPA SDWIS
Key Facts for Merrimack Residents
- Your city's water systems recorded 25 violations in the past 5 years.
- Homes built before 1986: 56% - older plumbing may contain lead solder.
- Estimated remediation: $2,200 per household.
- CDC health risk index: 11.54.
Merrimack's Water Providers
At present, 2 utilities serve the bulk of Merrimack, NH's residential water connections out of 2 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
- B
- B
Overview
We track home safety data for 1 ZIP code in Merrimack, New Hampshire (population ~27,604), covering 2 community water systems serving approximately 114,353 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Merrimack: B (75/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Merrimack water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0000 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status 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.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| PFOA | PFAS | 2 | 1 |
| PFNA | PFAS | 2 | 1 |
| Monochloroacetic Acid | Disinfection Byproducts | 2 | 1 |
| Dichloroacetic Acid | Disinfection Byproducts | 2 | 1 |
| Bromodichloromethane | Disinfection Byproducts | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 03054 | B | 25 | 0 | Merrimack Village District |
All ZIP Codes in Merrimack
- 03054 [B] - 25 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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Merrimack 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 Merrimack's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Merrimack Infrastructure Age
With 56% 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
Lead solder was standard in copper plumbing until federally banned in 1986; lead pipes were common in service lines pre-1970. Merrimack's median build year of 1985 reflects a housing stock where these older materials are a pervasive feature - not a rare legacy - of the residential plumbing landscape.
Over half of homes in Merrimack 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 Merrimack
At current valuations, Merrimack sits in the low remediation-share tier - the equity impact of fixing documented issues is proportionally minor.
Remediation costs in Merrimack are relatively low compared to home values. The $1,200–$3,300 estimated range is a small fraction of median property value. Home values are 12% above the New Hampshire average.
Merrimack: 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.
Older stock in Merrimack represents 56% of the inventory, and citywide monitoring runs at or above the federal action level - making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Merrimack: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Merrimack contains 61 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $26,189. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The <strong>$2,200</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
Deep Dive Reports
Detailed analysis for Merrimack, NH