Physical, compliance, and capital-execution pressure reflected in the blended headline composite.
States / Idaho
Idaho
Idaho municipal water system monitoring across 51 scored service markets serving approximately 1.3 million people, with Munimetric scores, stress signals, market rankings, and infrastructure risk context. This state profile highlights what is happening and why it matters using water-system, fiscal, capital, and signal context.
Idaho 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 51 covered systems. Updated May 2026.
National context
States sized by scored-market count. Color reflects average stress band.
51Markets scored
21.2Headline composite
~1.3MPop. served
212Active 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.
Falls Water Company Inc38.5watchAmmon City of37.9watchCapitol Water Corp34.0watchRathdrum City of34.0watchEagle Water Company Inc32.8watchMiddleton City of31.5watchBurley Water Dept30.5watchMountain Home City of29.9watchStar Sewer and Water Dist Water System29.3watchKetchum City of28.0watchBuhl City of28.0watchPocatello City of28.0watchBlackfoot City of28.0watchCity of Idaho Falls27.6watchShelley City of27.4watchRexburg City of27.3watchRigby City of26.8watchJerome City of23.8watchSun Valley Water and Sewer Dist23.7watchMountain Home Air Force Base23.7watchTwin Falls City of23.6watchMoscow Water Dept23.1watchUnited Water Idaho Inc23.1watchRupert City of21.9watchEagle, City of (eastern Zone)21.4watchPayette City of21.2watchHailey Water and Sewer20.5watchNampa City of19.5stableSt Anthony19.5stableGarden City Water and Sewer System19.3stableKuna City of19.3stableSandpoint Public Works Dept19.3stableMeridian Water Dept19.1stableLewiston City of18.5stableCentral Shoshone County Water Dist18.2stableCaldwell City of17.5stableWeiser City of15.8stableChubbuck City of15.1stableLewiston Orchards Irrigation Dist13.8stablePost Falls City of13.4stablePreston City of13.1stableAvondale Irrigation Dist12.3stableEast Greenacres Water Dist12.3stableEmmett City of11.9stableFiler Water Works11.5stableFruitland City of11.1stableUniversity of Idaho7.9stableAmerican Falls City of7.9stableFort Hall7.2stableCoeur D Alene City of5.9stableHayden Lake Irrigation Dist5.9stableFalls Water Company Inc38.5watchAmmon City of37.9watchCapitol Water Corp34.0watchRathdrum City of34.0watchEagle Water Company Inc32.8watchMiddleton City of31.5watchBurley Water Dept30.5watchMountain Home City of29.9watchStar Sewer and Water Dist Water System29.3watchKetchum City of28.0watchBuhl City of28.0watchPocatello City of28.0watchBlackfoot City of28.0watchCity of Idaho Falls27.6watchShelley City of27.4watchRexburg City of27.3watchRigby City of26.8watchJerome City of23.8watchSun Valley Water and Sewer Dist23.7watchMountain Home Air Force Base23.7watchTwin Falls City of23.6watchMoscow Water Dept23.1watchUnited Water Idaho Inc23.1watchRupert City of21.9watchEagle, City of (eastern Zone)21.4watchPayette City of21.2watchHailey Water and Sewer20.5watchNampa City of19.5stableSt Anthony19.5stableGarden City Water and Sewer System19.3stableKuna City of19.3stableSandpoint Public Works Dept19.3stableMeridian Water Dept19.1stableLewiston City of18.5stableCentral Shoshone County Water Dist18.2stableCaldwell City of17.5stableWeiser City of15.8stableChubbuck City of15.1stableLewiston Orchards Irrigation Dist13.8stablePost Falls City of13.4stablePreston City of13.1stableAvondale Irrigation Dist12.3stableEast Greenacres Water Dist12.3stableEmmett City of11.9stableFiler Water Works11.5stableFruitland City of11.1stableUniversity of Idaho7.9stableAmerican Falls City of7.9stableFort Hall7.2stableCoeur D Alene City of5.9stableHayden Lake Irrigation Dist5.9stable
State interpretation guide
How to read Idaho headline composite
Plain-language summary
Idaho 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
- 51 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
30 of 51Systems with recent public violation rows.Source-water mix51 systems
- Surface water6
- Groundwater45
- 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 50 of 51 included scored systems.
- PFAS monitoring summary records are stored for 49 of 51 included systems; missing records are not treated as non-detections.
- Lead and copper summary records are stored for 50 of 51 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 Idaho have recent recorded drinking-water violations?
- Stored public records show 30 covered systems with recent drinking-water violations, with 756 recorded violations across 51 covered systems in the recent 3 years window.
- How does Munimetric summarize PFAS public-record context in Idaho?
- Stored contaminant-monitoring summaries are present for 49 covered systems; 35 systems have PFAS detection context in this state summary.
- How does Munimetric summarize lead & copper context in Idaho?
- Stored lead & copper summaries are present for 50 covered systems; 14 systems have violation or action-level context in this state summary.
- What source-water types are represented across covered Idaho systems?
- Stored identity records group covered Idaho systems by source-water type: Surface water: 6, Groundwater: 45.
- Where can I find official drinking-water records for Idaho?
- The Official records drawer lists Public drinking-water profile, Contaminant monitoring records links where currently available for Idaho.
- 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 |
|---|---|---|---|---|---|
| Capitol Water CorpID4010022 | 9,000 | Groundwater | 149 | 38 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records, lead/copper context |
| Mountain Home, City OfID4200032 | 14,651 | Groundwater | 121 | 15 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context |
| Blackfoot City OfID6060007 | 11,922 | Groundwater | 89 | 10 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records |
| Falls Water Company IncID7100030 | 22,650 | Groundwater | 79 | 30 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records, lead/copper context |
| Rexburg City OfID7330022 | 40,462 | Groundwater | 60 | 4 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records |
| St AnthonyID7220067 | 3,606 | Groundwater | 58 | 6 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records |
| Fruitland City OfID3380005 | 7,135 | Surface water | 40 | 30 | recent violations recorded, recent enforcement history, recent monitoring/reporting failures |
| Lewiston City OfID2350014 | 15,001 | Surface water | 38 | 0 | recent violations recorded, recent monitoring/reporting failures, PFAS detections in stored records |
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
51 of the community drinking-water systems in Idaho are currently scored. Analytics below are calculated from this covered subset only. Covered systems serve approximately 1.3M people.
What the Data Suggests
Idaho has 51 scored service markets in the Munimetric coverage set, covering roughly 1.3 million 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 stands out as the dominant contributor to headline stress (12.4 points average), with Capex Pressure a distant second at 7.2. That pattern suggests a particular kind of pressure — concentrated rather than broadly distributed.
212 active signals are recorded across state markets. The most prevalent is Current Drought Severity, affecting 51 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 Stress12.4 / 20.0
Capex Pressure7.2 / 20.0
Governance Risk0.6 / 20.0
Revenue Fragility0.5 / 20.0
Rate Constraint0.4 / 20.0
Signals
Signal Frequency
| Signal | Severity | Markets affected | % of scored |
|---|---|---|---|
| Current Drought Severity | high | 51 | 100% |
| Compliance Escalation | high | 40 | 78% |
| Climate Hazard Exposure | medium | 36 | 71% |
| PFAS Contamination Risk | high | 35 | 69% |
| Monitoring / Reporting Failures | medium | 16 | 31% |
| Lead & Copper Rule Risk | high | 14 | 27% |
| Parent-Government Fiscal Stress | medium | 7 | 14% |
| High-AGI Out-Migration | high | 7 | 14% |
| Income Erosion | medium | 3 | 6% |
| Infrastructure Capital Gap | low | 2 | 4% |
| Utility Data Staleness | high | 1 | 2% |
Markets
Top Markets
| # | Market | Score | Band | Population | Signals |
|---|---|---|---|---|---|
| 1 | Falls Water Company Inc | 38.5 | Watch | 23K | 7 |
| 2 | Ammon City of | 37.9 | Watch | 17K | 6 |
| 3 | Capitol Water Corp | 34.0 | Watch | 9K | 6 |
| 4 | Rathdrum City of | 34.0 | Watch | 10K | 6 |
| 5 | Eagle Water Company Inc | 32.8 | Watch | 11K | 6 |
| 6 | Middleton City of | 31.5 | Watch | 13K | 5 |
| 7 | Burley Water Dept | 30.5 | Watch | 10K | 6 |
| 8 | Mountain Home City of | 29.9 | Watch | 15K | 7 |
| 9 | Star Sewer and Water Dist Water System | 29.3 | Watch | 14K | 5 |
| 10 | Ketchum City of | 28.0 | Watch | 4K | 5 |
| 11 | Buhl City of | 28.0 | Watch | 5K | 5 |
| 12 | Pocatello City of | 28.0 | Watch | 58K | 5 |
| 13 | Blackfoot City of | 28.0 | Watch | 12K | 5 |
| 14 | City of Idaho Falls | 27.6 | Watch | 69K | 5 |
| 15 | Shelley City of | 27.4 | Watch | 4K | 4 |
| 16 | Rexburg City of | 27.3 | Watch | 40K | 6 |
| 17 | Rigby City of | 26.8 | Watch | 5K | 4 |
| 18 | Jerome City of | 23.8 | Watch | 13K | 3 |
| 19 | Sun Valley Water and Sewer Dist | 23.7 | Watch | 3K | 5 |
| 20 | Mountain Home Air Force Base | 23.7 | Watch | 8K | 5 |
Comparison
State Comparison
National average: 25.0
| Rank | State | Avg Score | Band | Markets | Delta vs State |
|---|---|---|---|---|---|
| 38 | California | 21.7 | Watch | 711 | +0.5 |
| 39 | Nebraska | 21.3 | Watch | 44 | +0.1 |
| 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 |
Analytical posture
State Stress Analytics
Score Distribution
Distribution of scored market scores with the state average overlay.
51 markets plotted.
Stress vs Population
Each point is a scored market; tooltip reveals market-level context.
51 markets plotted.
Population View
People served by community water systems in Idaho, colored by stress band.
~1.3M people served by 51 systems in Idaho
Stable
Watch
Fragile
High Stress
Critical
51 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 | Falls Water Company Inc | 38.5 | Watch | 23K | 7 |
| 2 | Ammon City of | 37.9 | Watch | 17K | 6 |
| 3 | Capitol Water Corp | 34.0 | Watch | 9K | 6 |
| 4 | Rathdrum City of | 34.0 | Watch | 10K | 6 |
| 5 | Eagle Water Company Inc | 32.8 | Watch | 11K | 6 |
| 6 | Middleton City of | 31.5 | Watch | 13K | 5 |
| 7 | Burley Water Dept | 30.5 | Watch | 10K | 6 |
| 8 | Mountain Home City of | 29.9 | Watch | 15K | 7 |
| 9 | Star Sewer and Water Dist Water System | 29.3 | Watch | 14K | 5 |
| 10 | Ketchum City of | 28.0 | Watch | 4K | 5 |
| 11 | Buhl City of | 28.0 | Watch | 5K | 5 |
| 12 | Pocatello City of | 28.0 | Watch | 58K | 5 |
| 13 | Blackfoot City of | 28.0 | Watch | 12K | 5 |
| 14 | City of Idaho Falls | 27.6 | Watch | 69K | 5 |
| 15 | Shelley City of | 27.4 | Watch | 4K | 4 |
| 16 | Rexburg City of | 27.3 | Watch | 40K | 6 |
| 17 | Rigby City of | 26.8 | Watch | 5K | 4 |
| 18 | Jerome City of | 23.8 | Watch | 13K | 3 |
| 19 | Sun Valley Water and Sewer Dist | 23.7 | Watch | 3K | 5 |
| 20 | Mountain Home Air Force Base | 23.7 | Watch | 8K | 5 |
Detailed records
Registers
| # | Market | Score | Band | Population | Signals |
|---|---|---|---|---|---|
| 1 | Falls Water Company Inc | 38.5 | Watch | 23K | 7 |
| 2 | Ammon City of | 37.9 | Watch | 17K | 6 |
| 3 | Capitol Water Corp | 34.0 | Watch | 9K | 6 |
| 4 | Rathdrum City of | 34.0 | Watch | 10K | 6 |
| 5 | Eagle Water Company Inc | 32.8 | Watch | 11K | 6 |
| 6 | Middleton City of | 31.5 | Watch | 13K | 5 |
| 7 | Burley Water Dept | 30.5 | Watch | 10K | 6 |
| 8 | Mountain Home City of | 29.9 | Watch | 15K | 7 |
| 9 | Star Sewer and Water Dist Water System | 29.3 | Watch | 14K | 5 |
| 10 | Ketchum City of | 28.0 | Watch | 4K | 5 |
| 11 | Buhl City of | 28.0 | Watch | 5K | 5 |
| 12 | Pocatello City of | 28.0 | Watch | 58K | 5 |
| 13 | Blackfoot City of | 28.0 | Watch | 12K | 5 |
| 14 | City of Idaho Falls | 27.6 | Watch | 69K | 5 |
| 15 | Shelley City of | 27.4 | Watch | 4K | 4 |
| 16 | Rexburg City of | 27.3 | Watch | 40K | 6 |
| 17 | Rigby City of | 26.8 | Watch | 5K | 4 |
| 18 | Jerome City of | 23.8 | Watch | 13K | 3 |
| 19 | Sun Valley Water and Sewer Dist | 23.7 | Watch | 3K | 5 |
| 20 | Mountain Home Air Force Base | 23.7 | Watch | 8K | 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 51 community drinking-water systems in Idaho, 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 Idaho compares nationally.
- Which water systems in Idaho face the most infrastructure stress?
- The highest-stress systems in Idaho 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 Idaho compare to other states for drinking water infrastructure risk?
- Idaho is compared against all 50 states and territories using average MISI score, market count, and band distribution. The state comparison table above shows where Idaho ranks nationally and how its average score compares.
- Are there lead pipe or corrosion-related concerns in Idaho 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 Idaho?
- Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, data staleness, and financial stress indicators across Idaho systems. The signal frequency table above summarizes which signals are most prevalent statewide.
- Does Munimetric track boil water advisories in Idaho?
- 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.
- Falls Water Company Inc water system profile
- Ammon City of drinking water infrastructure profile
- Capitol Water Corp MISI score & system data
- Rathdrum City of water system profile
- Eagle Water Company Inc drinking water infrastructure profile
- Middleton City of MISI score & system data
- Burley Water Dept water system profile
- Mountain Home City of drinking water infrastructure profile
- Star Sewer and Water Dist Water System MISI score & system data
- Ketchum City of water system profile
- Buhl City of drinking water infrastructure profile
- Pocatello City of MISI score & system data
- Blackfoot City of water system profile
- City of Idaho Falls drinking water infrastructure profile
- Shelley City of MISI score & system data
Keep monitoring this state
Workflow access covers exports, Track, Munex, alerts, and repeat monitoring tools.
Water Infrastructure in Idaho
Munimetric tracks infrastructure stress across 51 community drinking-water systems in Idaho. 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 Idaho 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 Idaho?
- Munimetric assigns a state-level average MISI score based on the individual scores of all covered community water systems in Idaho. 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 Idaho face the most infrastructure stress?
- The state page ranks the highest-stress systems in Idaho 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 Idaho compare to other states for drinking water infrastructure risk?
- Idaho 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 Idaho 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 Idaho 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 Idaho?
- Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, population decline, income erosion, data staleness, and parent-government fiscal stress across Idaho water systems.
- Does Munimetric track boil water advisories in Idaho?
- 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 Idaho water systems by MISI stress band
- Browse Idaho water systems by population served
- Browse Idaho 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