Water discharged by total dissolved solids classification
Measurement answer
What this metric measures
Volume of discharged water classified as other water, using the disclosed total-dissolved-solids classification; the extracted C2.1 evidence defines other water as having total dissolved solids above 1,000 mg/L.
Specification
Metric specification
- Result format
- Structured table
- Unit
- m³ — source-defined reporting unit
- Reporting basis
- Reporting period
- Aggregation
- Sum of discharged-water volumes within each disclosed total-dissolved-solids classification.
- Pillar
- Environmental
- Topic
- Water discharge
- Controlled domain
- Water and marine resources
- Entity type
- Metric
Reporting boundary
Reporting entity's disclosed water-discharge boundary; the operational and value-chain boundary used must be stated.
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 DisclosureC2.1
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Version 1.0, June 2024
- Requirement
- Conditional
- Relationship
- Reuses Canonical Metric
- Mapping outcome
- Reused
- Source locator
- Page 46, Section 3.1 core-global metric application table, C2.1
- Adopting DisclosureSource evidence
TNFD Recommendations
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- September 2023
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- Page 84, table row C2.1
- Adopting Disclosure0a567831ae468f781a6b
TNFD Recommendations
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- September 2023
- Requirement
- Not Specified
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- Page 84, table row C2.1
Value structure
Dimensions and units
- Unit
- m³ — source-defined reporting unit
- Reporting basis
- Reporting period
Unit meaning: Values use m³ under the disclosed TNFD Recommendations method, period, location and reporting boundary.
Table fields and units
- reporting period
- site or geography
- water classification
- total dissolved solids criterion
- discharged-water volume (m³)
- measurement or estimation method
- boundary and exclusions
Published dimensions
- water classification
- total dissolved solids threshold
- discharge destination or receiving environment where reported
- geography
- site
- business activity
- direct versus proxy measurement method
Calculation method
Formula information
- Status
- Specified
- Formula type
- Sum
Formula
V_other = Σ v_i for discharged-water records i classified as other water, where total dissolved solids are greater than 1,000 mg/L.Apply the source-defined TNFD Recommendations method only within the disclosed location, ecosystem and value-chain boundary. C2.1 water-discharge classification fields are retained as one structured family rather than published as unrelated table-cell metrics. This category is a reportable volumetric result, but is not the same construct as an unclassified total-water-discharge metric.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
V_other | Other water discharged | Total reported volume of discharged water classified as other water. | m³ |
v_i | Discharged-water record volume | Volume of an individual discharged-water record within the reporting boundary. | m³ |
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 27 August 2026
Recommendations of the Taskforce on Nature-related Financial Disclosures
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- September 2023
- Locator
- Page 84, table row C2.1
Supports: The official TNFD Recommendations source supports the identity, boundary and method basis of “Water discharged by total dissolved solids classification”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: Recommendations of the Taskforce on Nature-related Financial Disclosures, September 2023.
- Disclose the total dissolved solids classification definition and threshold used.
- Disclose whether volumes are measured, modelled, estimated, or derived from a proxy method.
- Disclose the reporting boundary, covered locations, and any exclusions.
- State whether reported volumes represent actual discharges during the reporting period and identify material estimation uncertainty.
Record-specific limitations
- The extracted evidence identifies the 'other water' class only, defined as water with total dissolved solids greater than 1,000 mg/L.
- This classification field is not equivalent to total water discharge and must not be merged with an unclassified discharge total.
- Locations with materially different natural characteristics should remain separately identifiable rather than being inappropriately aggregated.
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.