Physical, compliance, and capital-execution pressure reflected in the blended headline composite.
Munimetric Water System Profile
Philadelphia, PA
Drinking Water Infrastructure Profile
Munimetric analysis of drinking water infrastructure in Philadelphia, PA, Pennsylvania, including MISI stress score, active signals, and peer-relative monitoring context. This profile highlights what is happening and why it matters using water-system, fiscal, capital, and signal context.
Philadelphia, PA has a MISI infrastructure stress score of 50.6/100 in the Fragile band as of 2026-05-19. Public records show surface-water sourcing, PFAS monitoring context, lead and copper compliance context and approximately 1,600,000 residents served. Updated May 2026.
State context
Current market shown in covered state context. Tile size reflects population served; color reflects stress band.
Current 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.
Monitoring context stored
Water Quality & Supply Context
Public-record context for this system. Stored monitoring and compliance records only. Does not change MISI.
Tier 1 profile guide
How to interpret Philadelphia, PA
Plain-language summary
Philadelphia, PA is part of the selected Tier 1 profile set. This page is designed to quickly explain what the MISI headline composite means here. 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
- Current MISI is 50.6 in the fragile band as of May 19, 2026.
- 95% confidence and 19 tracked structural signals support interpretation quality.
- Related market links are prioritized for same-state and same-risk-context comparisons.
What to do next
- Read the executive interpretation first to understand why the market is in its current band.
- Compare this profile with related systems to validate whether stress patterns are local or systemic.
- Open Pennsylvania state context to see how this market fits the statewide posture.
Tier 1 navigation
- Track changes for Philadelphia, PA
- Pennsylvania water infrastructure context
- How MISI is scored
- Water infrastructure research and guides
- Pittsburgh profile (same state | same stress band | same size band)
- Aqua Pa Main System profile (same state | same stress band | same size band)
- Mawc Yough Plant profile (same state | same stress band | same size band)
- Chester profile (same state | same stress band | same size band)
Executive context
What the Data Suggests
Philadelphia, PA's public water system serves roughly 1.6 million residents, placing it among the larger community systems in this coverage set. The current reading places the system in a zone of moderate-to-elevated stress that goes beyond normal operating variation.
The score is being driven mainly by Operational Stress, which is at the top of its range in the model, with Capex Pressure adding another heavy layer of pressure. That combination suggests strain is showing up across core system functions, not just one isolated dimension.
10 active stress signals are attached to this system, including 6 at high severity. That signal mix points to a system where several warning indicators are firing at once, not just one extreme outlier.
Within Community · 250k+ · Surface, this system ranks around the 97th percentile on measured stress, placing it near the top of peer-group stress.
Recent observations suggest the system has been relatively steady rather than sharply improving or deteriorating — the current picture looks more like persistent underlying pressure 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.
Analytical posture
Market Stress Analytics
Family Contribution
MISI family contributions for this market.
Peer Position
Where Philadelphia sits within its peer cohort.
Score History
Latest
50.6
Trend
+42.6
Observations
49
Structural Indicators
Operational Stress totals 20.000 points, led by compliance escalation.
Capex Pressure totals 20.000 points, led by infrastructure capital gap.
Revenue Fragility totals 3.994 points, led by high-agi out-migration.
Rate Constraint totals 6.599 points, led by income erosion.
Governance Risk totals 0.000 points with no triggered factors.
Stress movement
Diagnostics
Diagnostics & Movement
Compact status for confidence, data coverage, disclosure freshness, and stored score movement. Detailed diagnostic history remains available below.
Confidence
95%
Confidence is mainly capped by service-area mapping quality.
Factor coverage
Complete
All tracked confidence factors are currently available.
Disclosure freshness
Not available
Some profile sections are selectively summarized because confidence is currently medium.
Latest movement
flat 0.0
Compared with May 17, 2026.
Last material movement
-1.4
Recorded Apr 26, 2026.
History
49 observations stored
Latest stored observation May 19, 2026.
Show detailed diagnostic history
Expanded stress diagnostics
Open detailed contribution diagnostics
No detailed factor diagnostics are stored for this profile snapshot.
Confidence summary
Confidence is mainly capped by service-area mapping quality.
Missing factor coverage
No factor gaps are recorded on the latest stored score.
Disclosure freshness diagnostics
1 attached local documents · 1 structured facts
Some profile sections are selectively summarized because confidence is currently medium.
Latest reference Oct 29, 2025 · stale after Oct 29, 2026
Score movement
flat 0.0
Previous run May 17, 2026
May 19, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 17, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 10, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 9, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 8, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 7, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 6, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 5, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 4, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 3, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 2, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
May 1, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 30, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 29, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 28, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 27, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 26, 2026
Score 50.6 in band fragile. Confidence 95%.
Delta vs prior run -1.4
Apr 26, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 25, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 24, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 23, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 22, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 21, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 19, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 18, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 14, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 13, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 10, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 9, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 8, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 7, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 0.0
Apr 6, 2026
Score 52.0 in band fragile. Confidence 95%.
Delta vs prior run 11.0
Apr 5, 2026
Score 41.0 in band fragile. Confidence 83%.
Delta vs prior run 5.0
Apr 5, 2026
Score 36.0 in band watch. Confidence 95%.
Delta vs prior run 0.0
Apr 4, 2026
Score 36.0 in band watch. Confidence 95%.
Delta vs prior run -5.0
Apr 3, 2026
Score 41.0 in band fragile. Confidence 95%.
Delta vs prior run 5.0
Apr 3, 2026
Score 36.0 in band watch. Confidence 95%.
Delta vs prior run 0.0
Apr 2, 2026
Score 36.0 in band watch. Confidence 95%.
Delta vs prior run 0.0
Mar 29, 2026
Score 36.0 in band watch. Confidence 88%.
Delta vs prior run -5.0
Mar 25, 2026
Score 41.0 in band fragile. Confidence 88%.
Delta vs prior run 17.0
Mar 24, 2026
Score 24.0 in band watch. Confidence 80%.
Delta vs prior run -5.0
Mar 22, 2026
Score 29.0 in band watch. Confidence 80%.
Delta vs prior run 0.0
Mar 21, 2026
Score 29.0 in band watch. Confidence 80%.
Delta vs prior run 0.0
Mar 20, 2026
Score 29.0 in band watch. Confidence 80%.
Delta vs prior run 0.0
Mar 18, 2026
Score 29.0 in band watch. Confidence 80%.
Delta vs prior run 16.0
Mar 16, 2026
Score 13.0 in band stable. Confidence 80%.
Delta vs prior run 0.0
Mar 13, 2026
Score 13.0 in band stable. Confidence 80%.
Delta vs prior run 5.0
Mar 13, 2026
Score 8.0 in band stable. Confidence 74%.
Delta vs prior run 0.0
Mar 12, 2026
Score 8.0 in band stable. Confidence 74%.
Signals
Signal Timeline
- Signal
- high agi outmigration
- Score impact
- Not available
- Resolved
- Active
- Signal
- pfas contamination risk
- Score impact
- Not available
- Resolved
- Active
- Signal
- lead copper rule risk
- Score impact
- Not available
- Resolved
- Active
- Signal
- current drought severity
- Score impact
- Not available
- Resolved
- Active
- Signal
- climate hazard exposure
- Score impact
- Not available
- Resolved
- Active
- Signal
- high agi outmigration
- Score impact
- Not available
- Resolved
- Apr 7, 2026
- Signal
- pfas contamination risk
- Score impact
- Not available
- Resolved
- Apr 7, 2026
- Signal
- lead copper rule risk
- Score impact
- Not available
- Resolved
- Apr 7, 2026
- Signal
- current drought severity
- Score impact
- Not available
- Resolved
- Apr 7, 2026
- Signal
- climate hazard exposure
- Score impact
- Not available
- Resolved
- Apr 7, 2026
- Signal
- Days Cash on Hand
- Score impact
- Not available
- Resolved
- Apr 6, 2026
- Signal
- Days Cash on Hand
- Score impact
- Not available
- Resolved
- Apr 3, 2026
- Signal
- Days Cash on Hand
- Score impact
- Not available
- Resolved
- Mar 29, 2026
- Signal
- Infrastructure Capital Gap
- Score impact
- Not available
- Resolved
- Active
- Signal
- Monitoring and Reporting Failures
- Score impact
- Not available
- Resolved
- Active
- Signal
- Compliance Escalation
- Score impact
- Not available
- Resolved
- Active
- Signal
- Days Cash on Hand
- Score impact
- Not available
- Resolved
- Mar 24, 2026
- Signal
- Income Erosion
- Score impact
- Not available
- Resolved
- Active
- Signal
- Income Erosion
- Score impact
- Not available
- Resolved
- Active
Keep monitoring this market
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About Philadelphia, PA
Philadelphia, PA is a community drinking-water system in Pennsylvania that Munimetric monitors for infrastructure stress. The current MISI score of 50.6 out of 100 places this system in the fragile stress band as of 2026-05-19. The MISI composite reflects five structural risk families: Operational Stress, Capex Pressure, Revenue Fragility, Rate Constraint, and Governance Risk. Higher scores indicate more structural stress.
Data is assembled from EPA SDWA compliance records, American Community Survey demographic and economic indicators, FEMA National Risk Index hazard exposure data, state-reported financial disclosures, and stored public-record water quality context where available. This system serves approximately 1,600,000 people. The system has 5 recorded compliance violations in the SDWA record. Munimetric does not fabricate data where public records are unavailable. This profile is for structural monitoring and research—not a current-condition determination or credit rating. Updated May 2026.
- What is the Munimetric score for Philadelphia, PA?
- The current Munimetric Infrastructure Stress Index (MISI) score for Philadelphia, PA is 50.6 out of 100, placing this system in the fragile stress band. MISI is a composite of five structural risk families. Higher values indicate more stress. The score is deterministic, source-backed, and updated as new data becomes available.
- Does Philadelphia, PA show signs of drinking-water infrastructure stress?
- Munimetric monitors structural stress indicators for Philadelphia, PA across operational conditions, capital needs, revenue stability, rate affordability, and governance quality. The current MISI score and active signals shown in this profile reflect the latest available evidence from EPA, ACS, FEMA NRI, and state financial disclosures.
- Does Munimetric rate current tap-water conditions for Philadelphia, PA?
- No. Munimetric is not a water testing service and does not make current-condition determinations. This profile tracks structural conditions: compliance posture, financial pressure, infrastructure stress, and governance quality. For current water quality testing results, consult the system's Consumer Confidence Report or contact the local water utility.
- Has Philadelphia, PA had a boil water advisory?
- Munimetric does not track real-time boil water advisories. For current advisory status, contact your local water utility or state drinking water program. This profile tracks structural risk indicators and compliance history that provide long-term context around system reliability.
- Are lead pipes or corrosion risk a concern in Philadelphia, PA?
- Where EPA SDWA compliance data includes lead and copper rule monitoring, violations, or enforcement actions, that information feeds into the Operational Stress component of the MISI score. Munimetric does not fabricate lead pipe data where public records are silent.
- Does Munimetric include PFAS monitoring context for Philadelphia, PA?
- Where stored public records include UCMR or contaminant-monitoring summaries, Munimetric displays PFAS monitoring context as public-record evidence. Missing PFAS summaries are treated as missing records, not as non-detections. This context does not change MISI by itself.
- What source-water context is available for Philadelphia, PA?
- Munimetric displays stored source-water and supply context where public drinking-water identity records are available. Source-water context helps explain treatment and supply exposure, but missing source records remain explicit rather than inferred.
- Why might water rates be increasing in Philadelphia, PA?
- Rate pressure can reflect capital investment needs, a declining customer base, revenue fragility, affordability constraints, or parent-government fiscal stress. The Rate Constraint and Revenue Fragility score families specifically measure these pressures where data is available from public financial disclosures.
- What does the MISI score mean for Philadelphia, PA?
- The MISI score (50.6/100) is a composite measure of structural risk across five families: Operational Stress, Capex Pressure, Revenue Fragility, Rate Constraint, and Governance Risk. The headline remains a blended structural stress composite rather than a pure physical-condition index. The current methodology also downweights factors that are nearly universal or very rare in the frozen national reference population, so one common contextual factor does not dominate the headline by itself. Higher scores indicate more structural stress. It is deterministic and source-backed, not a credit rating.
- U.S. water infrastructure stress monitoring homepage
- Water infrastructure risk in Pennsylvania
- How Munimetric scores drinking water systems
- Compare water system profiles in the Screener
- Water infrastructure risk by state
- Water infrastructure research & guides
- Munimetric analytical rankings
- Water Systems with Infrastructure Capital Gap Signals
- Systems with Monitoring/Reporting Failures
- Largest Water Systems with Monitoring/Reporting Failures
- Systems with Compliance Escalation
- Pennsylvania MISI stress-band comparison hub
- Pennsylvania water systems by population served
- Pennsylvania water systems by source-water context