What is the Munimetric score for New Hampshire?

Munimetric assigns a state-level average MISI score based on the individual scores of all covered community water systems in New Hampshire. The state average, band distribution, and market-level rankings are shown on this page. Higher MISI values indicate greater structural stress.

Which water systems in New Hampshire face the most infrastructure stress?

The state page ranks the highest-stress systems in New Hampshire by MISI score. Stress reflects operational burden, capital gaps, revenue fragility, rate affordability constraints, and governance risk, not a single compliance event. The headline remains a blended structural stress composite rather than a pure physical-condition index. Workflow actions remain reserved for account access.

How does New Hampshire compare to other states for drinking water infrastructure risk?

New Hampshire is compared against all 50 states and territories using average MISI score, market count, and band distribution. Munimetric tracks nationwide coverage across 9,000+ scored service markets.

Are there lead pipe or corrosion-related concerns in New Hampshire water systems?

Where lead and copper rule compliance data is available from EPA SDWA records, Munimetric factors it into the Operational Stress family score. Specific lead service line inventories vary by system. Individual system profiles contain the most detailed compliance context available.

Does Munimetric include PFAS monitoring context for New Hampshire water systems?

Munimetric summarizes stored PFAS monitoring context where public contaminant-monitoring records are available. Missing PFAS summaries remain missing records, not non-detections, and this public-record layer does not change the MISI score by itself.

What compliance signals are active in New Hampshire?

Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, population decline, income erosion, data staleness, and parent-government fiscal stress across New Hampshire water systems.

Does Munimetric track boil water advisories in New Hampshire?

Munimetric does not track real-time boil water advisories. For current advisories, contact your local water utility or state drinking water program. Munimetric monitors structural conditions that provide context around system reliability over time.

How many covered systems in New Hampshire have recent recorded drinking-water violations?

Stored public records show 12 covered systems with recent drinking-water violations, with 29 recorded violations across 42 covered systems in the recent 3 years window.

How does Munimetric summarize PFAS public-record context in New Hampshire?

Stored contaminant-monitoring summaries are present for 39 covered systems; 16 systems have PFAS detection context in this state summary.

How does Munimetric summarize lead & copper context in New Hampshire?

Stored lead & copper summaries are present for 40 covered systems; 37 systems have violation or action-level context in this state summary.

What source-water types are represented across covered New Hampshire systems?

Stored identity records group covered New Hampshire systems by source-water type: Surface water: 24, Groundwater: 18.

Where can I find official drinking-water records for New Hampshire?

The Official records drawer lists Public drinking-water profile, Contaminant monitoring records links where currently available for New Hampshire.

Is this a real-time statewide tap-water condition rating?

No. This is not a real-time tap-water condition determination. Munimetric summarizes stored public-record context for research and navigation, and this layer does not change MISI.

States / New Hampshire

New Hampshire

Name: New Hampshire Drinking Water Infrastructure Stress Data
Creator: Munimetric
License: https://munimetric.com/terms

Statewide Munimetric profile for New Hampshire, covering drinking-water market scores, signal activity, infrastructure stress context, and population insights across 42 scored service markets serving approximately 713,004 people. This state profile highlights what is happening and why it matters using water-system, fiscal, capital, and signal context.

New Hampshire has an average MISI infrastructure stress score of 19.9/100 in the Watch band as of 2026-08-16. Public records summarize recent drinking-water violations, PFAS monitoring records, lead and copper context, and source-water mix across 42 covered systems. Updated May 2026.

National context

States sized by scored-market count. Color reflects average stress band.

42Markets scored

19.9Headline composite

~713KPop. served

167Active signals

Band distribution (MISI)

State headline composite

Component of current headline composite

Infrastructure Stress17.0 / 100

Physical, compliance, and capital-execution pressure reflected in the blended headline composite.

Socioeconomic Stress2.9 / 100

Affordability, demand-base, and parent-government fiscal pressure reflected in the blended headline composite.

Observability Stress0.0 / 100

Staleness, disclosure freshness, and reporting-visibility effects reflected in the blended headline composite.

19.9 headline compositeNew Hampshire state composite42 markets~713K people served

Dover Water Dept34.7watch Rye Water Dist32.0watch Exeter Water Dept31.0watch Hudson Water Dept30.9watch Manchester Water Works29.0watch Aquarion Water/Nh27.3watch Salem Water Dept27.3watch Portsmouth Water Works27.0watch Seabrook Water Dept25.3watch Milford Water Utilities Dept25.3watch Peterborough Water Works25.3watch Littleton Water and Light Dept25.3watch Bristol Water Works25.1watch North Conway Water Pct23.2watch Derry Water Dept22.5watch Central Hooksett Water Pct21.4watch Peu/Londonderry21.4watch Somersworth Water Works21.2watch Pembroke Water Works21.2watch Claremont Water Dept21.2watch Berlin Water Works20.8watch Wolfeboro Water and Sewer20.8watch Jaffrey Water Works19.3stable Rochester Water Dept18.5stable Meredith Water Dept17.7stable Unh/Durham Water Sys17.6stable Peu/Litchfield17.4stable Penacook Boscawen Water Pct17.2stable Pennichuck Water Works16.4stable Lebanon Water Dept16.3stable Merrimack Village Dist15.3stable Laconia Water Works14.9stable Concord Water Dept14.8stable Franklin Water Works14.8stable Newmarket Water Works12.4stable Nh Motor Speedway11.0stable Hanover Water Dept10.8stable Plymouth Vil Water and Sewer10.8stable Newport Water Works8.0stable Gunstock Area7.4stable Lower Bartlett Water Pct7.2stable Keene Water Dept7.2stable Dover Water Dept34.7watch Rye Water Dist32.0watch Exeter Water Dept31.0watch Hudson Water Dept30.9watch Manchester Water Works29.0watch Aquarion Water/Nh27.3watch Salem Water Dept27.3watch Portsmouth Water Works27.0watch Seabrook Water Dept25.3watch Milford Water Utilities Dept25.3watch Peterborough Water Works25.3watch Littleton Water and Light Dept25.3watch Bristol Water Works25.1watch North Conway Water Pct23.2watch Derry Water Dept22.5watch Central Hooksett Water Pct21.4watch Peu/Londonderry21.4watch Somersworth Water Works21.2watch Pembroke Water Works21.2watch Claremont Water Dept21.2watch Berlin Water Works20.8watch Wolfeboro Water and Sewer20.8watch Jaffrey Water Works19.3stable Rochester Water Dept18.5stable Meredith Water Dept17.7stable Unh/Durham Water Sys17.6stable Peu/Litchfield17.4stable Penacook Boscawen Water Pct17.2stable Pennichuck Water Works16.4stable Lebanon Water Dept16.3stable Merrimack Village Dist15.3stable Laconia Water Works14.9stable Concord Water Dept14.8stable Franklin Water Works14.8stable Newmarket Water Works12.4stable Nh Motor Speedway11.0stable Hanover Water Dept10.8stable Plymouth Vil Water and Sewer10.8stable Newport Water Works8.0stable Gunstock Area7.4stable Lower Bartlett Water Pct7.2stable Keene Water Dept7.2stable

State interpretation guide

How to read New Hampshire headline composite

Plain-language summary

New Hampshire currently shows an average MISI headline composite of 19.9 versus a national average of 24.4. In v0.1.2, the headline composite remains a blended structural stress measure rather than a pure physical-condition index. A frozen national reference and a 50 percent single-factor cap reduce the dominance of near-universal and very rare factors, while the component bars continue to separate infrastructure, socioeconomic, and observability readings.

Why this page stands out

42 scored systems are included in this state view, with explicit confidence and source-backed context.
State posture is benchmarked against national averages, not evaluated in isolation.
Top system links below connect state-level findings directly to profile-level diagnostics.

What to do next

Review the executive context to understand the state-level pressure pattern.
Open top system profiles to inspect what is actually driving stress at market level.
Use saved monitoring after research access is enabled to follow high-stress systems over time.

Priority New Hampshire paths

Public record layer

Statewide Water Quality Context

Stored public-record context for recent drinking-water violations, contaminant monitoring, and source-water mix across covered systems. This is not a tap-water safety determination and does not change the MISI score.

Systems with recent violations

12 of 42Systems with recent public violation rows.

Source-water mix42 systems

Surface water24
Groundwater18
Purchased water0
Mixed source0
Not stored0

Latest identity snapshot: Jun 30, 2026

Coverage

Violation, enforcement, and compliance-burden counts use the recent 3 years window for dated stored records.
Drinking-water identity snapshots are stored for 40 of 42 included scored systems.
PFAS monitoring summary records are stored for 39 of 42 included systems; missing records are not treated as non-detections.
Lead and copper summary records are stored for 40 of 42 included systems; missing records are not treated as absence of lead/copper context.

Water quality questionsDefinitions and public-record context

How many covered systems in New Hampshire have recent recorded drinking-water violations?: Stored public records show 12 covered systems with recent drinking-water violations, with 29 recorded violations across 42 covered systems in the recent 3 years window.
How does Munimetric summarize PFAS public-record context in New Hampshire?: Stored contaminant-monitoring summaries are present for 39 covered systems; 16 systems have PFAS detection context in this state summary.
How does Munimetric summarize lead & copper context in New Hampshire?: Stored lead & copper summaries are present for 40 covered systems; 37 systems have violation or action-level context in this state summary.
What source-water types are represented across covered New Hampshire systems?: Stored identity records group covered New Hampshire systems by source-water type: Surface water: 24, Groundwater: 18.
Where can I find official drinking-water records for New Hampshire?: The Official records drawer lists Public drinking-water profile, Contaminant monitoring records links where currently available for New Hampshire.
Is this a real-time statewide tap-water condition rating?: No. This is not a real-time tap-water condition determination. Munimetric summarizes stored public-record context for research and navigation, and this layer does not change MISI.

Official records

Public drinking-water profileEPA ECHO: Federal drinking-water dashboard and public-record search entry point.
Contaminant monitoring recordsEPA UCMR: Federal contaminant-monitoring program reference and public data entry point.

Methodology/source notes

Methodology/source notesDisplayed from stored public drinking-water records and official program references. This layer does not change MISI.
Enforcement historyEPA ECHO / SDWIS: Violation and enforcement counts are aggregated from stored public compliance records across covered systems.
Contaminant monitoring recordsEPA UCMR: PFAS context uses stored contaminant-monitoring summaries where available; missing records are not treated as non-detections.
State drinking-water programOfficial link not currently stored for this state program mapping.

Top recent compliance-burden systemsRecent 3 years

System	Population	Source water	Recent violations	Recent enforcement	Public-record flags
Salem Water DeptNH2051010	21,000	Surface water	4	16	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records, lead/copper context
Seabrook Water DeptNH2111010	14,000	Groundwater	4	16	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records, lead/copper context
Aquarion Water/NhNH1051010	34,000	Groundwater	4	8	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records, lead/copper context
Claremont Water DeptNH0461010	9,000	Surface water	4	8	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context
Peterborough Water WorksNH1871010	4,500	Groundwater	3	6	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context
Meredith Water DeptNH1521010	3,750	Surface water	2	18	recent violations recorded, recent enforcement history, lead/copper context
Milford Water Utilities DeptNH1561010	9,500	Surface water	2	8	recent violations recorded, recent enforcement history, lead/copper context
Hudson Water DeptNH1201010	16,700	Groundwater	2	0	recent violations recorded, recent monitoring/reporting failures, PFAS detections in stored records, lead/copper context

This is not a real-time tap-water condition determination. For current advisories or health guidance, consult the utility or state drinking-water program.

Executive context

What This Page Shows

42 of the community drinking-water systems in New Hampshire are currently scored. Analytics below are calculated from this covered subset only. Covered systems serve approximately 713K people.

What the Data Suggests

New Hampshire has 42 scored service markets in the Munimetric coverage set, covering roughly 713,004 residents in total. At the latest reading, the state-level average lands at 19.9 out of 100, indicating early but meaningful signs of structural stress in aggregate. No markets currently sit in elevated-stress bands.

Across state markets, Capex Pressure (8.6 points average) and Operational Stress (8.4) are the leading contributors to headline stress. The relatively close spacing suggests pressure is spread across more than one dimension.

167 active signals are recorded across state markets. The most prevalent is Climate Hazard Exposure, affecting 40 markets.

State-level average stress has been relatively steady between recent observation periods, suggesting the current picture reflects persistent conditions rather than a sudden shift.

This summary is based on structured, source-backed public data and is intended for research and monitoring only. It is not investment advice, a credit opinion, or municipal advisory guidance.

Recent Movement

Latest average MISI is 19.9 as of Aug 16, 2026. Movement since Aug 15, 2026 is flat.

Compact summary from 94 stored state observations.

State Family Contribution Summary

Capex Pressure8.6 / 20.0

Operational Stress8.4 / 20.0

Governance Risk1.8 / 20.0

Revenue Fragility1.0 / 20.0

Rate Constraint0.0 / 20.0

Signals

Signal Frequency

Signal	Severity	Markets affected	% of scored
Climate Hazard Exposure	medium	40	95%
Lead & Copper Rule Risk	high	37	88%
Current Drought Severity	medium	29	69%
PFAS Contamination Risk	high	16	38%
Parent-Government Fiscal Stress	high	16	38%
Compliance Escalation	high	15	36%
High-AGI Out-Migration	high	11	26%
Monitoring / Reporting Failures	medium	3	7%

Markets

Top Markets

#	Market	Score	Band	Population	Signals
1	Dover Water Dept	34.7	Watch	29K	6
2	Rye Water Dist	32.0	Watch	4K	6
3	Exeter Water Dept	31.0	Watch	12K	6
4	Hudson Water Dept	30.9	Watch	17K	7
5	Manchester Water Works	29.0	Watch	124K	6
6	Aquarion Water/Nh	27.3	Watch	34K	5
7	Salem Water Dept	27.3	Watch	21K	5
8	Portsmouth Water Works	27.0	Watch	33K	5
9	Seabrook Water Dept	25.3	Watch	14K	5
10	Milford Water Utilities Dept	25.3	Watch	10K	5
11	Peterborough Water Works	25.3	Watch	5K	5
12	Littleton Water and Light Dept	25.3	Watch	7K	3
13	Bristol Water Works	25.1	Watch	4K	4
14	North Conway Water Pct	23.2	Watch	6K	3
15	Derry Water Dept	22.5	Watch	17K	4
16	Central Hooksett Water Pct	21.4	Watch	5K	4
17	Peu/Londonderry	21.4	Watch	6K	4
18	Somersworth Water Works	21.2	Watch	12K	5
19	Pembroke Water Works	21.2	Watch	5K	5
20	Claremont Water Dept	21.2	Watch	9K	4

Comparison

State Comparison

National average: 24.4

Rank	State	Avg Score	Band	Markets	Delta vs State
41	Nebraska	20.1	Stable	44	+0.2
42	Maine	20.0	Watch	33	+0.2
43	New Hampshire	19.9	Watch	42	+0.0
44	Alabama	19.2	Stable	289	-0.7
45	Montana	18.8	Stable	38	-1.0

Analytical posture

State Stress Analytics

Score Distribution

Distribution of scored market scores with the state average overlay.

42 markets plotted.

Stress vs Population

Each point is a scored market; tooltip reveals market-level context.

42 markets plotted.

Population View

People served by community water systems in New Hampshire, colored by stress band.

~713K people served by 42 systems in New Hampshire

Stable

Watch

Fragile

High Stress

Critical

42 scored systems · colored by stress band

Peer Constellation

Select a market to see its nearest peers by score similarity.

Center market:

24 nearest peers by score distance.

Score Trend

Latest

19.9

Trend

+19.9

Observations

Extended layers

Advanced State Context

Priority views, detailed registers, and methodology supporting the analytical core above.

Markets & signals

Priority Views

#	Market	Score	Band	Population	Signals
1	Dover Water Dept	34.7	Watch	29K	6
2	Rye Water Dist	32.0	Watch	4K	6
3	Exeter Water Dept	31.0	Watch	12K	6
4	Hudson Water Dept	30.9	Watch	17K	7
5	Manchester Water Works	29.0	Watch	124K	6
6	Aquarion Water/Nh	27.3	Watch	34K	5
7	Salem Water Dept	27.3	Watch	21K	5
8	Portsmouth Water Works	27.0	Watch	33K	5
9	Seabrook Water Dept	25.3	Watch	14K	5
10	Milford Water Utilities Dept	25.3	Watch	10K	5
11	Peterborough Water Works	25.3	Watch	5K	5
12	Littleton Water and Light Dept	25.3	Watch	7K	3
13	Bristol Water Works	25.1	Watch	4K	4
14	North Conway Water Pct	23.2	Watch	6K	3
15	Derry Water Dept	22.5	Watch	17K	4
16	Central Hooksett Water Pct	21.4	Watch	5K	4
17	Peu/Londonderry	21.4	Watch	6K	4
18	Somersworth Water Works	21.2	Watch	12K	5
19	Pembroke Water Works	21.2	Watch	5K	5
20	Claremont Water Dept	21.2	Watch	9K	4

Detailed records

Registers

#	Market	Score	Band	Population	Signals
1	Dover Water Dept	34.7	Watch	29K	6
2	Rye Water Dist	32.0	Watch	4K	6
3	Exeter Water Dept	31.0	Watch	12K	6
4	Hudson Water Dept	30.9	Watch	17K	7
5	Manchester Water Works	29.0	Watch	124K	6
6	Aquarion Water/Nh	27.3	Watch	34K	5
7	Salem Water Dept	27.3	Watch	21K	5
8	Portsmouth Water Works	27.0	Watch	33K	5
9	Seabrook Water Dept	25.3	Watch	14K	5
10	Milford Water Utilities Dept	25.3	Watch	10K	5
11	Peterborough Water Works	25.3	Watch	5K	5
12	Littleton Water and Light Dept	25.3	Watch	7K	3
13	Bristol Water Works	25.1	Watch	4K	4
14	North Conway Water Pct	23.2	Watch	6K	3
15	Derry Water Dept	22.5	Watch	17K	4
16	Central Hooksett Water Pct	21.4	Watch	5K	4
17	Peu/Londonderry	21.4	Watch	6K	4
18	Somersworth Water Works	21.2	Watch	12K	5
19	Pembroke Water Works	21.2	Watch	5K	5
20	Claremont Water Dept	21.2	Watch	9K	4

Munimetric tracks infrastructure stress across 42 community drinking-water systems in New Hampshire, covering compliance conditions, capital needs, revenue and rate pressure, and governance risk. Use this page to research which systems face the highest structural stress and how New Hampshire compares nationally.

Which water systems in New Hampshire face the most infrastructure stress?: The highest-stress systems in New Hampshire are ranked by MISI score above. Stress reflects operational burden, capital gaps, revenue fragility, rate affordability constraints, and governance risk—not a single compliance event. In v0.1.2, the headline composite remains a blended structural stress measure rather than a pure physical-condition index. A frozen national reference and a 50 percent single-factor cap reduce the dominance of near-universal and very rare factors, while the component bars continue to separate infrastructure, socioeconomic, and observability readings.
How does New Hampshire compare to other states for drinking water infrastructure risk?: New Hampshire is compared against all 50 states and territories using average MISI score, market count, and band distribution. The state comparison table above shows where New Hampshire ranks nationally and how its average score compares.
Are there lead pipe or corrosion-related concerns in New Hampshire water systems?: Where lead and copper rule compliance data is available from EPA SDWA records, Munimetric factors it into the Operational Stress family. Specific lead service line inventories vary by system. Individual system profiles contain the most detailed compliance context available.
What compliance signals are active in New Hampshire?: Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, data staleness, and financial stress indicators across New Hampshire systems. The signal frequency table above summarizes which signals are most prevalent statewide.
Does Munimetric track boil water advisories in New Hampshire?: Munimetric does not track real-time boil water advisories. For current advisories, contact your local water utility or state drinking water program. Munimetric monitors structural conditions—compliance posture, infrastructure stress, and governance risk—that provide broader context around system reliability.

Keep monitoring this state

Research access covers saved monitoring, alerts, recurring briefs, and team review.

Get the Water Stress Brief Request research access

Water Infrastructure in New Hampshire

Munimetric tracks infrastructure stress across 42 community drinking-water systems in New Hampshire. Each system receives a Munimetric Infrastructure Stress Index (MISI) score from 0 to 100, calculated across five risk families: Operational Stress, Capex Pressure, Revenue Fragility, Rate Constraint, and Governance Risk. Higher scores indicate more structural stress. Scores are source-backed and deterministic, drawing from EPA SDWA compliance records, American Community Survey demographic and economic data, FEMA National Risk Index hazard profiles, and state financial disclosures.

State-level monitoring shows which systems face the highest structural stress, how New Hampshire compares against other states nationally, and which monitoring signals are most active across the state. Each individual system profile includes compliance history, score family drivers, peer rankings within population-based cohorts where safeguards pass, and public source context. Full provenance cards and source workbench views remain workflow-gated. Munimetric covers community water systems across all 50 states and territories. This is structural risk research—not a water quality rating, advisory feed, or credit rating. Updated May 2026.

The statewide public-record layer adds drinking-water violation categories, PFAS monitoring summaries where stored, lead and copper context, source-water mix, and official record links across covered systems. These records help explain water-system context alongside infrastructure stress without turning Munimetric into a tap-water safety determination.

What is the Munimetric score for New Hampshire?: Munimetric assigns a state-level average MISI score based on the individual scores of all covered community water systems in New Hampshire. The state average, band distribution, and market-level rankings are shown on this page. Higher MISI values indicate greater structural stress.
Which water systems in New Hampshire face the most infrastructure stress?: The state page ranks the highest-stress systems in New Hampshire by MISI score. Stress reflects operational burden, capital gaps, revenue fragility, rate affordability constraints, and governance risk, not a single compliance event. The headline remains a blended structural stress composite rather than a pure physical-condition index. Workflow actions remain reserved for account access.
How does New Hampshire compare to other states for drinking water infrastructure risk?: New Hampshire is compared against all 50 states and territories using average MISI score, market count, and band distribution. Munimetric tracks nationwide coverage across 9,000+ scored service markets.
Are there lead pipe or corrosion-related concerns in New Hampshire water systems?: Where lead and copper rule compliance data is available from EPA SDWA records, Munimetric factors it into the Operational Stress family score. Specific lead service line inventories vary by system. Individual system profiles contain the most detailed compliance context available.
Does Munimetric include PFAS monitoring context for New Hampshire water systems?: Munimetric summarizes stored PFAS monitoring context where public contaminant-monitoring records are available. Missing PFAS summaries remain missing records, not non-detections, and this public-record layer does not change the MISI score by itself.
What compliance signals are active in New Hampshire?: Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, population decline, income erosion, data staleness, and parent-government fiscal stress across New Hampshire water systems.
Does Munimetric track boil water advisories in New Hampshire?: Munimetric does not track real-time boil water advisories. For current advisories, contact your local water utility or state drinking water program. Munimetric monitors structural conditions that provide context around system reliability over time.