COUNTY REPORT NH

Rockingham County, New Hampshire

43 ZIP codes · Avg score 68/100 · Grade C · Updated

ZipCheckup grade for Rockingham County: C.

A mixed picture - some signals here are worth your attention.

Unlike top-rated counties, Rockingham County's 43 ZIP codes carry a fair number of documented violations - chlorine compliance and disinfection byproduct limits are the categories most often cited in recent data.

How Rockingham County Compares

Rockingham County68/100
New Hampshire avg74/100
National avg73/100

How Rockingham County Compares

C
County Grade
68/100
Avg Safety Score
43
ZIP Codes
43
Water Systems

Rockingham County scores 6 points below the New Hampshire state average (74/100) and 5 points below the national average (73/100).

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:

C
County Grade
68
Avg Safety Score
43
ZIP Codes
Raymond
Best ZIP: 03077 (83/100)
Plaistow
Lowest ZIP: 03865 (64/100)
$465K
Median Home Value
$2,002
Avg Remediation (43% of home value)

ZIP Code Risk Map

Water Quality Map: Rockingham County, New Hampshire

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 11.7 (asthma 10%, diabetes 9.1%)

Estimated additional annual cost per homeowner: $1,714, driven primarily by flood

56% of homes built before 1978 (lead paint era)

Violation History (2021–2025)

↓ Improving trend

EPA violation counts by year across Rockingham County water systems. Health-based shown in red, total in blue.

2021
12 (12 health)
2022
21 (21 health)
2023
23 (23 health)
2024
1 (1 health)
2025
2 (2 health)

Peak year: 2023 with 23 violations. Past 5 years: 59 total (59 health-based). Health-based violations are declining versus the prior 2-year window.

Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.

County Health Indicators vs National Average

Asthma 10% (national: 8.9%)
Diabetes 9.1% (national: 10.5%)
Obesity 31.2% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1984
Median Build Year
56%
Pre-1978 Housing
41/100
Infrastructure Stress Indicator
51%
ZIPs with High Infrastructure Stress
Low
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $1,714

Flood $930/yr
Sea Level Rise $400/yr
Energy Code Gap $347/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

133,999 housing units in Rockingham County

Pre-1940 14%
1940–1959 10%
1960–1979 23%
1980–1999 32%
2000+ 21%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Water Safety Affordability

How much it costs to fix water issues relative to home values in Rockingham County

$465K
Median Home Value
$2,002
Est. Remediation Cost
0.4%
of Home Value
Remediation as % of home value low burden

Remediation costs are relatively manageable for most homeowners in Rockingham County, representing a small fraction of property value.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for Rockingham County residents

Asthma 10% (US avg: 8.9%)
Diabetes 9.1% (US avg: 11%)
Obesity 31.2% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems serving Rockingham County

8 community water systems serving Rockingham County.

Show all 8 water systems

43 total water systems serve Rockingham County.

Systems with the most violations in Rockingham County

5 water systems with recorded EPA violations.

All ZIP Codes in Rockingham County

43 ZIP codes tracked in Rockingham County.

# ZIP Code City Safety Score Grade Violations Home Value
1 03077 Raymond 83 B 1 (1 health) $343K
2 03857 Newmarket 83 B 0 $385K
3 03833 Exeter 67 C 1 (1 health) $456K
4 03840 Greenland 67 C 0 $595K
5 03038 Derry 66 C 2 (1 health) $382K
6 03053 Londonderry 66 C 2 $464K
7 03087 Windham 66 C 2 $685K
8 03801 Portsmouth 66 C 1 $648K
9 03811 Atkinson 66 C 1 $489K
10 03841 Hampstead 66 C 1 $466K
11 03854 New Castle 66 C 1 $1613K
12 03862 North Hampton 66 C 2 $612K
13 03885 Stratham 66 C 2 $600K
14 03079 Salem 65 C 3 (1 health) $439K
15 03870 Rye 65 C 4 (1 health) $928K
16 03874 Seabrook 65 C 5 $435K
17 03842 Hampton 64 C 6 (1 health) $492K
18 03865 Plaistow 64 C 4 (4 health) $382K
19 03032 Auburn — — $548K
20 03036 Chester — — $480K
21 03037 Deerfield — — $390K
22 03040 East Candia — — —
23 03041 East Derry — — —
24 03042 Epping — — 3 $421K
25 03044 Fremont — — $405K
26 03073 North Salem — — —
27 03261 Northwood — — $356K
28 03290 Nottingham — — $419K
29 03291 West Nottingham — — —
30 03802 Portsmouth — — —
31 03803 Portsmouth — — —
32 03804 Portsmouth — — —
33 03819 Danville — — 3 (1 health) $407K
34 03826 East Hampstead — — 1 $486K
35 03827 East Kingston — — 0 $537K
36 03843 Hampton — — —
37 03844 Hampton Falls — — 5 $665K
38 03848 Kingston — — $442K
39 03856 Newfields — — 0 $618K
40 03858 Newton — — 0 $429K
41 03859 Newton Junction — — —
42 03871 Rye Beach — — 4 (1 health) $1504K
43 03873 Sandown — — $402K

Recommended Buyer Guides for Rockingham County

If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations - federal data drives the order, not retailer arrangements.

Deep Dive Reports

Detailed analysis for Rockingham County, New Hampshire

Overview

Rockingham County in New Hampshire covers 43 tracked ZIP records with an average Home Safety Score of C (68/100) across 18 scored records.

21 of 26 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 11 health-based violations appear in the available health breakdown.

← Back to New Hampshire Home Safety Profile

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Rockingham County?
Rockingham County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Rockingham County?
Rockingham County is served by 43 public water systems that supply drinking water to residents across 43 ZIP codes.
What is the biggest environmental risk in Rockingham County?
The primary environmental risk factor in Rockingham County is flood. This contributes to an estimated additional annual cost of $1,714 per homeowner.
How old are homes in Rockingham County?
The median home build year in Rockingham County is 1984. 56% of homes were built before 1978, which means they may contain lead-based paint and older plumbing materials.
How does Rockingham County compare to New Hampshire?
Rockingham County has an average Home Safety Score of 68/100 under model 4.0.0, which is below the New Hampshire state average of 74/100.

How to cite this page

APA ZipCheckup. (2026). Rockingham County, NH: HSS 68/100; 11 Health Violations. https://zipcheckup.com/county/new-hampshire/rockingham/
BibTeX 
@misc{zipcheckup-county-new-hampshire-rockingham,
  author = {{ZipCheckup}},
  title  = {{Rockingham County, NH: HSS 68/100; 11 Health Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/new-hampshire/rockingham/}
}

Page version: August 2026.

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