Sanitary sewer overflow incidents, volume and recovery
Measurement answer
What this metric measures
Reports sanitary sewer overflow incident count and volume, the proportion of overflow volume recovered, and incident duration where volume information is unavailable.
Specification
Metric specification
- Result format
- Structured table
- Unit
- Structured table — see field-level units
- Reporting basis
- Reporting period
- Aggregation
- Total sanitary sewer overflow incidents and overflow volume during the reporting period; recovered volume expressed as a proportion of overflow volume where volume is available
- Pillar
- Environmental
- Topic
- Water pollution and wastewater management
- Controlled domain
- Pollution
- Entity type
- Metric
Reporting boundary
Sanitary sewer overflow events within the reporting organization’s water utility and service-provider operations
Verified source occurrences
Framework coverage
This is one canonical metric. The bindings below show every verified framework occurrence without creating duplicate metric pages. Edition, disclosure, role, and relationship remain source-specific.
- Adopting DisclosureSource evidence
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- p.62, §3.2, Table 11, WU.C2.1
- Adopting DisclosureWU.C2.1
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Version 1.0, June 2025
- Requirement
- Conditional
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- p.62, §3.2, Table 11, WU.C2.1
Value structure
Dimensions and units
- Unit
- Structured table — see field-level units
- Reporting basis
- Reporting period
Unit meaning: Each field uses its stated unit and retains the applicable sector, reporting boundary, period and method.
Table fields and units
- Measurement field
- Reported value
- Unit
- Data availability and substitution basis
- Measurement method and notes
Published dimensions
- Measurement field: incident count, overflow volume, recovered-volume proportion or incident duration where volume is unavailable
- Data availability: volume available or unavailable
Disclosure method
Formula information
- Status
- Not applicable
- Formula type
- Structured Disclosure
Disclosure form
No single formulaReport the source-defined result with its stated fields and method disclosures. This is a standalone operational water-pollution reporting profile. Although the shortlist contains a similarly named sanitary-sewer-overflow profile, the supplied evidence explicitly includes duration as an alternative where volume is unavailable; the shortlist does not establish the same complete field set and therefore cannot be treated as the same construct without flattening the documented variant.
Verified sources
Evidence and status sources
Sustopedia checked each record-specific claim directly against primary publisher material. Labels distinguish current measurement authority from future compatibility and corroborative, legal, edition, or method status context. Corroborative evidence can support a stated limitation but cannot establish the core measurement by itself.
Measurement evidence
- Measurement evidenceChecked 30 August 2026
TNFD additional sector guidance collection
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Locator
- p.62, §3.2, Table 11, WU.C2.1
Supports: The official TNFD sector guidance supports the identity, boundary and method basis of “Sanitary sewer overflow incidents, volume and recovery”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: TNFD sector guidance, Final English sector guidance collection through August 2026 (17 documents).
- Disclose the definition used for a sanitary sewer overflow incident.
- Disclose the measurement methods and units used for overflow volume, recovered volume and incident duration.
- Disclose the method used to calculate the proportion of overflow volume recovered.
- Disclose when and why incident duration was reported in place of overflow volume.
- Disclose the operational boundary and treatment of incidents with incomplete volume or recovery data.
Record-specific limitations
- Incident duration is an alternative disclosure where volume information is unavailable and is not directly comparable with measured overflow volume.
- Recovery proportion is meaningful only where the associated overflow volume and recovered volume are measured on a consistent basis.
- Reported results depend on the completeness of overflow-event detection, incident logging and recovery measurement.
Interpret this metric with the stated reporting boundary, period convention, value shape, and unit. Results prepared with different boundaries or conventions may not be directly comparable.
Measurement evidence supports the core record-specific claims described above. Corroborative evidence can support limitations, while compatibility and status sources provide their separately labelled context. None of these cards by itself determines an organisation's legal applicability, filing readiness, assurance status, or compliance conclusion.