Physical, compliance, and capital-execution pressure reflected in the blended headline composite.
States / New Hampshire
New Hampshire
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 711,044 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 21.2/100 in the Watch band as of 2026-05-19. 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
21.2Headline composite
~711KPop. served
176Active signals
Band distribution (MISI)
State headline composite
Component of current headline composite
Affordability, demand-base, and parent-government fiscal pressure reflected in the blended headline composite.
Staleness, disclosure freshness, and reporting-visibility effects reflected in the blended headline composite.
Exeter Water Dept37.7watchDover Water Dept35.7watchPeterborough Water Works32.0watchManchester Water Works30.0watchAquarion Water/Nh29.3watchSalem Water Dept29.3watchPortsmouth Water Works29.0watchRye Water Dist28.9watchSeabrook Water Dept27.3watchBristol Water Works27.0watchMilford Water Utilities Dept26.3watchDerry Water Dept24.5watchHudson Water Dept24.4watchLebanon Water Dept24.2watchWolfeboro Water and Sewer23.7watchPeu/Londonderry23.3watchBerlin Water Works22.7watchCentral Hooksett Water Pct22.4watchSomersworth Water Works22.2watchPembroke Water Works22.2watchJaffrey Water Works21.2watchClaremont Water Dept20.6watchNorth Conway Water Pct20.5watchRochester Water Dept19.5stableMeredith Water Dept18.7stableUnh/Durham Water Sys18.6stablePeu/Litchfield18.4stablePenacook Boscawen Water Pct18.2stablePennichuck Water Works17.4stableLaconia Water Works16.4stableConcord Water Dept16.4stableFranklin Water Works16.4stableMerrimack Village Dist16.3stableHanover Water Dept14.8stableLittleton Water and Light Dept14.8stablePlymouth Vil Water and Sewer14.8stableNewmarket Water Works14.4stableLower Bartlett Water Pct13.1stableNh Motor Speedway12.0stableKeene Water Dept11.2stableGunstock Area8.4stableNewport Water Works5.9stableExeter Water Dept37.7watchDover Water Dept35.7watchPeterborough Water Works32.0watchManchester Water Works30.0watchAquarion Water/Nh29.3watchSalem Water Dept29.3watchPortsmouth Water Works29.0watchRye Water Dist28.9watchSeabrook Water Dept27.3watchBristol Water Works27.0watchMilford Water Utilities Dept26.3watchDerry Water Dept24.5watchHudson Water Dept24.4watchLebanon Water Dept24.2watchWolfeboro Water and Sewer23.7watchPeu/Londonderry23.3watchBerlin Water Works22.7watchCentral Hooksett Water Pct22.4watchSomersworth Water Works22.2watchPembroke Water Works22.2watchJaffrey Water Works21.2watchClaremont Water Dept20.6watchNorth Conway Water Pct20.5watchRochester Water Dept19.5stableMeredith Water Dept18.7stableUnh/Durham Water Sys18.6stablePeu/Litchfield18.4stablePenacook Boscawen Water Pct18.2stablePennichuck Water Works17.4stableLaconia Water Works16.4stableConcord Water Dept16.4stableFranklin Water Works16.4stableMerrimack Village Dist16.3stableHanover Water Dept14.8stableLittleton Water and Light Dept14.8stablePlymouth Vil Water and Sewer14.8stableNewmarket Water Works14.4stableLower Bartlett Water Pct13.1stableNh Motor Speedway12.0stableKeene Water Dept11.2stableGunstock Area8.4stableNewport Water Works5.9stable
State interpretation guide
How to read New Hampshire headline composite
Plain-language summary
New Hampshire currently shows an average MISI headline composite of 21.2 versus a national average of 25.0. 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 Track to monitor changes in high-stress systems over time.
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
11 of 42Systems with recent public violation rows.Source-water mix42 systems
- Surface water24
- Groundwater18
- Purchased water0
- Mixed source0
- Not stored0
Latest identity snapshot: Dec 31, 2025
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 11 covered systems with recent drinking-water violations, with 72 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 |
|---|---|---|---|---|---|
| North Conway Water PctNH0511030 | 5,500 | Groundwater | 44 | 16 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context |
| Meredith Water DeptNH1521010 | 3,750 | Surface water | 6 | 24 | recent violations recorded, recent enforcement history, lead/copper context |
| 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 |
| Peterborough Water WorksNH1871010 | 4,500 | Groundwater | 3 | 6 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context |
| Milford Water Utilities DeptNH1561010 | 9,500 | Surface water | 2 | 8 | recent violations recorded, recent enforcement history, lead/copper context |
| Claremont Water DeptNH0461010 | 9,000 | Surface water | 2 | 8 | recent violations recorded, recent enforcement history, 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 711K people.
What the Data Suggests
New Hampshire has 42 scored service markets in the Munimetric coverage set, covering roughly 711,044 residents in total. At the latest reading, the state-level average lands at 21.2 out of 100, indicating early but meaningful signs of structural stress in aggregate. No markets currently sit in elevated-stress bands.
Across state markets, Operational Stress (9.6 points average) and Capex Pressure (8.7) are the leading contributors to headline stress. The relatively close spacing suggests pressure is spread across more than one dimension.
176 active signals are recorded across state markets. The most prevalent is Current Drought Severity, affecting 42 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 21.2 as of May 19, 2026. Movement since May 17, 2026 is flat.
Compact summary from 42 stored state observations.
State Family Contribution Summary
Operational Stress9.6 / 20.0
Capex Pressure8.7 / 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 |
|---|---|---|---|
| Current Drought Severity | high | 42 | 100% |
| Climate Hazard Exposure | medium | 40 | 95% |
| Lead & Copper Rule Risk | high | 37 | 88% |
| PFAS Contamination Risk | high | 16 | 38% |
| Parent-Government Fiscal Stress | high | 16 | 38% |
| Compliance Escalation | high | 13 | 31% |
| High-AGI Out-Migration | high | 11 | 26% |
| Monitoring / Reporting Failures | medium | 1 | 2% |
Markets
Top Markets
| # | Market | Score | Band | Population | Signals |
|---|---|---|---|---|---|
| 1 | Exeter Water Dept | 37.7 | Watch | 12K | 6 |
| 2 | Dover Water Dept | 35.7 | Watch | 29K | 6 |
| 3 | Peterborough Water Works | 32.0 | Watch | 5K | 5 |
| 4 | Manchester Water Works | 30.0 | Watch | 124K | 6 |
| 5 | Aquarion Water/Nh | 29.3 | Watch | 34K | 5 |
| 6 | Salem Water Dept | 29.3 | Watch | 21K | 5 |
| 7 | Portsmouth Water Works | 29.0 | Watch | 33K | 5 |
| 8 | Rye Water Dist | 28.9 | Watch | 4K | 6 |
| 9 | Seabrook Water Dept | 27.3 | Watch | 14K | 5 |
| 10 | Bristol Water Works | 27.0 | Watch | 4K | 5 |
| 11 | Milford Water Utilities Dept | 26.3 | Watch | 10K | 5 |
| 12 | Derry Water Dept | 24.5 | Watch | 17K | 4 |
| 13 | Hudson Water Dept | 24.4 | Watch | 17K | 5 |
| 14 | Lebanon Water Dept | 24.2 | Watch | 10K | 4 |
| 15 | Wolfeboro Water and Sewer | 23.7 | Watch | 6K | 4 |
| 16 | Peu/Londonderry | 23.3 | Watch | 5K | 4 |
| 17 | Berlin Water Works | 22.7 | Watch | 10K | 4 |
| 18 | Central Hooksett Water Pct | 22.4 | Watch | 5K | 4 |
| 19 | Somersworth Water Works | 22.2 | Watch | 12K | 5 |
| 20 | Pembroke Water Works | 22.2 | Watch | 5K | 5 |
Comparison
State Comparison
National average: 25.0
| Rank | State | Avg Score | Band | Markets | Delta vs State |
|---|---|---|---|---|---|
| 40 | Idaho | 21.2 | Watch | 51 | +0.0 |
| 41 | Hawaii | 21.2 | Watch | 40 | +0.0 |
| 42 | New Hampshire | 21.2 | Watch | 42 | +0.0 |
| 43 | Kentucky | 20.8 | Stable | 233 | -0.4 |
| 44 | Wyoming | 20.6 | Stable | 25 | -0.6 |
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.
~711K 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.
24 nearest peers by score distance.
Score Trend
Latest
21.2
Trend
+21.2
Observations
42
Extended layers
Advanced State Context
Priority views, detailed registers, and methodology supporting the analytical core above.
Markets & signals
Priority Views
| # | Service Market | Score | Band | Pop. | Signals |
|---|---|---|---|---|---|
| 1 | Exeter Water Dept | 37.7 | Watch | 12K | 6 |
| 2 | Dover Water Dept | 35.7 | Watch | 29K | 6 |
| 3 | Peterborough Water Works | 32.0 | Watch | 5K | 5 |
| 4 | Manchester Water Works | 30.0 | Watch | 124K | 6 |
| 5 | Aquarion Water/Nh | 29.3 | Watch | 34K | 5 |
| 6 | Salem Water Dept | 29.3 | Watch | 21K | 5 |
| 7 | Portsmouth Water Works | 29.0 | Watch | 33K | 5 |
| 8 | Rye Water Dist | 28.9 | Watch | 4K | 6 |
| 9 | Seabrook Water Dept | 27.3 | Watch | 14K | 5 |
| 10 | Bristol Water Works | 27.0 | Watch | 4K | 5 |
| 11 | Milford Water Utilities Dept | 26.3 | Watch | 10K | 5 |
| 12 | Derry Water Dept | 24.5 | Watch | 17K | 4 |
| 13 | Hudson Water Dept | 24.4 | Watch | 17K | 5 |
| 14 | Lebanon Water Dept | 24.2 | Watch | 10K | 4 |
| 15 | Wolfeboro Water and Sewer | 23.7 | Watch | 6K | 4 |
| 16 | Peu/Londonderry | 23.3 | Watch | 5K | 4 |
| 17 | Berlin Water Works | 22.7 | Watch | 10K | 4 |
| 18 | Central Hooksett Water Pct | 22.4 | Watch | 5K | 4 |
| 19 | Somersworth Water Works | 22.2 | Watch | 12K | 5 |
| 20 | Pembroke Water Works | 22.2 | Watch | 5K | 5 |
Detailed records
Registers
| # | Market | Score | Band | Population | Signals |
|---|---|---|---|---|---|
| 1 | Exeter Water Dept | 37.7 | Watch | 12K | 6 |
| 2 | Dover Water Dept | 35.7 | Watch | 29K | 6 |
| 3 | Peterborough Water Works | 32.0 | Watch | 5K | 5 |
| 4 | Manchester Water Works | 30.0 | Watch | 124K | 6 |
| 5 | Aquarion Water/Nh | 29.3 | Watch | 34K | 5 |
| 6 | Salem Water Dept | 29.3 | Watch | 21K | 5 |
| 7 | Portsmouth Water Works | 29.0 | Watch | 33K | 5 |
| 8 | Rye Water Dist | 28.9 | Watch | 4K | 6 |
| 9 | Seabrook Water Dept | 27.3 | Watch | 14K | 5 |
| 10 | Bristol Water Works | 27.0 | Watch | 4K | 5 |
| 11 | Milford Water Utilities Dept | 26.3 | Watch | 10K | 5 |
| 12 | Derry Water Dept | 24.5 | Watch | 17K | 4 |
| 13 | Hudson Water Dept | 24.4 | Watch | 17K | 5 |
| 14 | Lebanon Water Dept | 24.2 | Watch | 10K | 4 |
| 15 | Wolfeboro Water and Sewer | 23.7 | Watch | 6K | 4 |
| 16 | Peu/Londonderry | 23.3 | Watch | 5K | 4 |
| 17 | Berlin Water Works | 22.7 | Watch | 10K | 4 |
| 18 | Central Hooksett Water Pct | 22.4 | Watch | 5K | 4 |
| 19 | Somersworth Water Works | 22.2 | Watch | 12K | 5 |
| 20 | Pembroke Water Works | 22.2 | Watch | 5K | 5 |
State intelligence is assembled from EPA SDWA compliance records, American Community Survey demographic and economic indicators, FEMA NRI hazard exposure profiles, and state-reported financial disclosures. Each service market receives a MISI score (0–100) based on five families: Operational Stress, Capex Pressure, Revenue Fragility, Rate Constraint, and Governance Risk. Scores are deterministic and threshold-based. 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. Peer context is provided by percentile ranking within population-based cohorts.
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.
- Exeter Water Dept water system profile
- Dover Water Dept drinking water infrastructure profile
- Peterborough Water Works MISI score & system data
- Manchester Water Works water system profile
- Aquarion Water/Nh drinking water infrastructure profile
- Salem Water Dept MISI score & system data
- Portsmouth Water Works water system profile
- Rye Water Dist drinking water infrastructure profile
- Seabrook Water Dept MISI score & system data
- Bristol Water Works water system profile
- Milford Water Utilities Dept drinking water infrastructure profile
- Derry Water Dept MISI score & system data
- Hudson Water Dept water system profile
- Lebanon Water Dept drinking water infrastructure profile
- Wolfeboro Water and Sewer MISI score & system data
Keep monitoring this state
Workflow access covers exports, Track, Munex, alerts, and repeat monitoring tools.
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.
- U.S. water infrastructure stress monitoring homepage
- How Munimetric scores drinking water systems
- Browse all water system profiles in the Screener
- Compare water infrastructure risk across all U.S. states
- Browse New Hampshire water systems by MISI stress band
- Browse New Hampshire water systems by population served
- Browse New Hampshire water systems by source-water type
- Water infrastructure research & guides
- Munimetric analytical rankings
- Compare states by average MISI
- Compare states by High Stress share
- National High-Stress water-system ranking