GRI 303: Water and Effluents 2018 · Topic Standard · Cross-sectoral
Disclosure GRI 303-4
Water discharge
Practical guidance for preparing this disclosure. Use this card to identify datapoints, verify claims and organise supporting evidence. For exact requirements, always refer to the official GRI source.
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Reviewed by
Dr Ross Kurinko · GRI Certified Trainer
To prepare this disclosure
13 datapoints ↓
6 claims to verify ↓
5 evidence areas ↓
3 report examples ↓
Disclosure focus
This disclosure asks an organisation to explain where its water is discharged and how much is discharged, rather than only describing water use in general. The focus is on the organisation’s own operations and the places where water leaves those operations, so the report should make clear what discharges are included, what is excluded, and whether the information covers the whole organisation or only selected sites.
In practice, the key point is coverage and clarity: readers should be able to see whether discharge data comes from all relevant facilities, a defined group of sites, or just a few locations, and understand the basis used to measure it. If some operations are not included, the organisation should make that limitation clear so the disclosure does not give a misleading picture of its overall discharge profile.
* This LRA educational guidance supports disclosure preparation. For the exact requirements, always refer to the official GRI source.
Before you start
A quick mental checklist before you prepare this disclosure — tick each as you settle it.
Preparation
Key datapoints to prepare
| Datapoint | What to capture | Evidence hint | Owner |
|---|---|---|---|
| Total discharge volume | The full volume of water released from operations into any receiving area during the reporting period, expressed as one total figure. | Water balance or discharge register, site meter logs, wastewater invoices, and period-end consolidation. | Environment / Facilities |
| Discharge by destination | A breakdown of the total discharge volume by where the water went, using the organisation’s chosen destination categories. | Environmental reporting workbook, discharge register, and site-level classification notes for each outlet or receiving area. | Environment / Sustainability reporting |
| Third-party water transfer | Whether any water supplied by another party is passed on to other organisations for their use, recorded as a yes/no response. | Utility contracts, water supply and resale records, site operations logs, and commercial arrangements with counterparties. | Operations / Procurement |
| Third-party water volume | The amount of water received from another party and then sent on to other organisations for use, for the reporting period. | Meter readings, transfer logs, invoices, and any resale or onward-supply records. | Operations / Finance |
| Discharge by category | A breakdown of total discharge volume by the organisation’s internal discharge categories, as used in reporting. | Environmental data system, site discharge schedules, and the category mapping used in consolidation. | Environment / Reporting |
| Stress-area discharge total | The total volume of water discharged from locations identified as water-stressed during the reporting period. | Site location list, water-stress screening or mapping, discharge records, and consolidation workbook. | Environment / Site management |
| Stress-area discharge split | A breakdown of discharge volume from water-stressed locations by the organisation’s reporting categories. | Water-stress site register, discharge data by site, and the category mapping used for the split. | Environment / Sustainability reporting |
| Substances treated | The named substances of concern for which discharge treatment is applied before release. | Treatment plant specifications, permit conditions, laboratory results, and the list of substances covered by treatment controls. | Environment / Compliance |
| Substance definition basis | A plain explanation of how the organisation decided which substances count as substances of concern for this disclosure. | Internal methodology note, risk assessment, compliance register, and any substance screening criteria. | Environment / Compliance |
| Reference list used | Any external standard, recognised list, or internal criteria used to decide which substances are treated as substances of concern. | Methodology paper, policy note, regulatory references, and links or extracts from the list or criteria applied. | Environment / Compliance |
| Limit-setting method | How discharge limits were set for the substances of concern, including the basis used to choose each limit. | Permit documents, internal standards, engineering calculations, and approval records for limit setting. | Environment / Compliance / Engineering |
| Breach count | The number of times discharge limits were not met during the reporting period, counted as incidents. | Incident log, compliance register, laboratory exceedance reports, and corrective action records. | Environment / Compliance |
| Compilation notes | Any extra context needed to understand how the figures were assembled, including scope, methods, assumptions, and key exclusions. | Reporting methodology, consolidation notes, boundary memo, and any assumptions log or data-quality commentary. | Sustainability reporting / Finance |
Show GRI 303-4 sub-elements (LRA working checklist)
- Use the relevant international rule set, recognised list, or criteria to identify the substances you treat as priority concerns.
- Set out the method used to decide the discharge thresholds for those priority substances of concern.
- Provide the background needed for a reader to understand how the figures were compiled.
- Explain how the priority substances of concern were identified.
- State whether third-party water was passed on to other organisations for use.
- Report the count of breaches of discharge thresholds.
- List the priority substances of concern for which discharges receive treatment.
- Report the total volume of water discharged to all destinations.
- Break down total water discharge to all destinations by category.
- Break down total water discharge to all destinations by destination type.
- Report the total water discharged to destinations in water-stressed areas.
- Break down water discharge to water-stressed areas by category.
- Report the volume of third-party water passed on to other organisations for use.
LRA working checklist - paraphrased; see official source
How to prepare
- Set the reporting boundary first: decide which sites, operations and time period are in scope, and make sure the same boundary is used across every figure and narrative in this disclosure.
- Agree the definitions before you calculate anything: specify what you will count as a discharge destination, how you will group destinations and categories, and how you will identify water-stressed locations for the relevant totals.
- Gather the source records that support each required item: meter readings, discharge logs, treatment records, incident records, and any internal or external documents used to classify priority substances, set limits, or confirm whether water was passed on to another organisation for use.
- Compile the reported outputs in a way that matches the data type for each item: enter the overall discharge total, break it down by destination type and by category, show the subset linked to water-stressed areas with its own breakdown, and provide the required narrative on priority substances, limit-setting, and any non-compliance count.
- Explain any exclusions, estimation methods, boundary changes, reclassifications or other choices that affect comparability, and include enough context for a reader to understand how the numbers and descriptions were built.
- Check the final draft against the official source and your evidence pack: confirm every required item is covered, the labels and groupings are consistent, and the reported figures and narratives align with the underlying records before sign-off.
Request the discharge and treatment data from site operations
Translate the disclosure into an internal business question — then adapt it to your organisation's own language.
What water leaves our sites, where does it go, how is it grouped, and what treatment, limit-setting, and breach records support the figures?
Use your organisation’s own site, utility, treatment, and compliance terms first, then map them to the reporting fields. Keep the ask in the language your operations, facilities, and environmental teams already use, rather than using framework labels.
Weak request
Please provide the GRI 303-4 water discharge data and evidence for the reporting period.
Why it fails: It uses framework language only, so the owner has to translate the ask into their own records. It also leaves out the practical details needed to pull the right site data, the split by destination, the water-stress subset, the treatment and limit-setting basis, and the incident log references.
Better request
Please send the site water discharge pack for [period] from your operations records: totals by site, where the water went using your normal destination names, any transfer to another organisation, the water-stressed site subset, the substances you treat before release, how you define that substance list, how release limits are set, any breaches, and the source extracts plus a short note on method and assumptions.
Formal email template
Subject: Request for site water discharge data and supporting records Hi [Name], I’m pulling together the sustainability reporting pack and need your help with the site water discharge information for [reporting period]. Please send, for each included site/asset: - the total volume of water leaving the site - the destination split using your normal site categories - any water sent on to another organisation for use, including the volume - the subset from sites you classify as water-stressed, with the same split - the list of substances you treat before release, plus how you define that list - the basis you use to set release limits for those substances - any breaches or non-conformance events against those limits - a short note on how the figures were compiled and any assumptions or exclusions Please also include the source files or system extracts, and confirm the period, boundary, and measurement method used. If it helps, you can return it in the table format below. Please adapt this to your organisation’s own terminology and check the official source before sign-off. Thanks, [Your name]
Short Teams / Slack version
Hi [Name] — could you share the site water discharge pack for [period]? Please include totals, destination split, any transfer to another organisation, water-stressed site figures, treated substances, limit-setting basis, breach count, and a short compilation note. Use your normal site terms and send the source extract(s) too. Thanks.
Industry examples
Food manufacturing
Context. A factory network with process water, cooling water, and trade effluent records held by site engineering and EHS.
Adapted request. Please share the discharge pack for [period] for all included plants: total outflow, split by our usual outlet names (for example sewer, surface water, tanker transfer), any water passed to another business for use, the water-stressed plant subset, the treated substance list, the basis for the site release limits, and any permit or limit breaches. Include the meter exports, lab results, and the incident log reference.
Example response. Plant A: 120,000 m3 total; 90,000 m3 to sewer; 30,000 m3 to surface water; 0 m3 transferred to another business; water-stressed site yes; treated substances: ammonia, COD, suspended solids; limit breaches: 2; source files: meter export, lab report, incident log.
Data centres
Context. A portfolio with cooling system blowdown, site drainage, and environmental permit tracking managed by facilities and compliance.
Adapted request. Please provide the site discharge pack for [period] for each data centre: total discharge, split by our internal outlet categories, any volumes sent to another organisation, the water-stressed site subset, the list of substances treated before release, how that list is defined, the method used to set discharge limits, and any exceedances. Please attach the source system export and a short note on how estimates were made where meters are not fitted.
Example response. DC North: 18,500 m3 total; 16,000 m3 to foul sewer; 2,500 m3 to surface water; 0 m3 transferred to another organisation; water-stressed site yes; treated substances: pH adjustment chemicals and suspended solids; limit breaches: 0; source files: facilities dashboard export, permit tracker, monthly compliance note.
The full request pack — response form, data table, evidence metadata and sign-off — is in the Download Centre.
Draft your disclosure
LRA training templates — adapt them to your organisation, and check the official source before sign-off.
Method note
Explain how the figures were compiled, including the basis used to classify destinations, categories, water-stressed locations and priority substances, plus any external list or criteria relied on.
Context note
Set out what the totals mean in practice by distinguishing direct discharge from water passed to other organisations, and by showing how much of the discharge occurred in water-stressed areas or involved priority substances.
Fluctuation statement
If the numbers moved materially, describe the operational or site-level reasons behind the change, such as shifts in discharge routes, category mix, stressed-location activity, treatment coverage or compliance events.
Content index entry
GRI 303-4 Water discharge — [location / page] / [notes]
Download Centre
Professional preparation tools and forms for GRI 303-4. Each download includes a concise “How to use” guide.
Assurance readiness
For each claim, check the evidence
| Claim | Risk | Evidence to check |
|---|---|---|
| I prepared the coverage figure from the discharge records we held for the reporting period, using the same boundary and cut-off rules throughout so the total is complete and not double-counted. | The assurer will test whether the figure really covers all relevant discharges, whether any sites, periods or flows were left out, and whether the boundary rules were applied consistently. | ['Reporting boundary note showing which operations, sites and time period were included', 'Source discharge logs or meter records used to build the total', 'Reconciliation showing the reported figure to underlying site-level data', 'Documented cut-off and consolidation rules applied before publication'] |
| I split the reported volume using our internal destination categories, and the grouping was done from the same source dataset rather than from separate estimates. | The assurer will probe whether the category split is complete, whether each discharge was assigned to only one bucket, and whether the category labels match the underlying records. | ['Data mapping that links source records to each destination category', 'Working paper showing the category totals add back to the overall figure', 'System extract or spreadsheet used for the classification', 'Review sign-off confirming the category split was checked before release'] |
| Where third-party water was passed on for use by another organisation, we identified it separately and kept a clear audit trail for the volume reported. | The assurer will check whether this item was correctly identified, whether the organisation had a basis for saying it was passed on for use, and whether the volume is supported by records. | ['Contracts, transfer notes or operational records showing the onward transfer', 'Volume calculation or meter evidence for the amount reported', 'Internal memo explaining the basis for treating the flow as third-party water sent on for use', 'Evidence of review of the classification before publication'] |
| The amount attributed to the onward transfer was taken from the same controlled data set as the main discharge figure, with any exclusions or adjustments documented. | The assurer will look for unsupported adjustments, inconsistent treatment between the main figure and this sub-figure, and weak controls over the calculation. | ['Calculation workbook with formulas and version control', 'List of any adjustments, exclusions or estimation steps', 'Reconciliation between the sub-figure and source records', 'Approval trail showing the figure was checked before reporting'] |
| I compiled the category breakdown from the underlying discharge records and checked that the sub-totals reconcile to the published total. | The assurer will test whether the category analysis is mathematically sound, whether categories overlap, and whether the same discharge has been counted more than once. | ['Category schedule with each line item assigned once only', 'Arithmetic check showing sub-totals equal the overall amount', 'Source data extract supporting the category split', 'Independent review or second-person check evidence'] |
| For the water-stressed locations, I used the same reporting rules as for the wider dataset, but filtered the records to the relevant areas before calculating the amount. | The assurer will examine whether the stress-screening was applied correctly, whether the location list is current, and whether the filtered amount is complete for those areas. | ['List or map of locations treated as water-stressed', 'Method note showing how the stressed-area filter was applied', 'Underlying records tagged to those locations', 'Reconciliation of the stressed-area amount to the filtered source data'] |
Evidence pack to prepare
- The governing policy or written commitment behind this disclosure
- A methodology / definition note setting out how the disclosure was scoped and prepared
- Source-system exports the figures or facts were drawn from
- The internal approval / sign-off record for the disclosure before publication
- Minutes or records evidencing the relevant engagement or consultation
Common reporting gaps
- Figures are stated without the supporting narrative, or narrative without figures.
- Scope is inconsistent between the text and the numbers.
- The reporting boundary is left undefined.
- Material changes since the previous period are not disclosed.
- Estimates and measured values are not distinguished.
- Source records for the figures are not identified.
Mistakes to avoid when collecting the data
- Wrong owner, wrong desk
People often ask the sustainability team for figures that sit with site operations, utilities, or the lab, so the first request goes to the wrong person and the source record is never found.
- Using framework language instead of site terms
The data request is written in disclosure language rather than the organisation’s own process terms, so local teams cannot match it to the logs, permits, or spreadsheets they actually keep.
- No clear boundary for what is in scope
Collectors fail to pin down which sites, outlets, or discharge routes are included, so some records are left out while others are counted twice.
- Wrong reporting period or cut-off
The team pulls numbers from a different date range than the one used for the report, so late entries, corrections, or partial-period records distort the final set.
- Mixing unlike counting bases
Volumes from different measurement methods are added together without checking the basis behind each source, which makes the combined total unreliable.
- Losing the original source labels
Once the figures are copied into a working file, the site name, outlet code, or treatment route is stripped away, making it impossible to trace each number back to its origin.
- Combining populations that should stay separate
Records for ordinary discharge, water sent on to another organisation, and water from stressed locations are merged into one pool, so the required splits cannot be rebuilt later.
- Missing evidence trail and sign-off
The team keeps the numbers but not the supporting files, version history, or reviewer approval, so no one can show how the data was assembled or who checked it before submission.
Where judgement is often needed
- Set the reporting perimeter after buy-ins and sell-offs
Explain which sites and volumes are kept in the year’s figures when ownership changes part-way through the period, and state the cut-off rule you used so readers can see why some flows were included or left out.
- Reconcile local discharge labels across countries
Where site records use different national terms or permit categories, map them into one internal grouping and disclose the mapping so like-for-like totals can be understood.
- Decide how to handle borderline sites and shared operations
State whether facilities just inside or just outside your operating control, joint arrangements, or leased premises were counted, and describe the rule used for those edge cases.
- Choose the timing basis for the annual total
If some locations report by calendar month, permit cycle, or meter-read date rather than the reporting year, explain the timing basis and any adjustments made to align the figures.
- Separate direct readings from calculated estimates
Disclose which volumes came from meters and which were estimated or modelled, together with the method used for estimates and any material gaps or assumptions.
- Round consistently and show the effect on totals
State the rounding convention used for site and group figures, and make clear if small differences arise because rounded line items do not exactly add up to the published total.
- Aggregate sensitive site data without losing meaning
If individual locations cannot be named or split out for privacy, security, or contractual reasons, explain the level of aggregation used and how readers can still understand the main pattern.
- Explain how treated releases and third-party transfers were classified
Clarify whether treated outflows and any water passed to another organisation for its own use were counted in the main discharge figures or shown separately, and describe the basis for that choice.
Examples
Illustrative examples
Synthetic, written by LRA — not from a company report, not text from any standard.
Food processing · synthetic · written by LRA
This example shows a concise way to present discharge volumes, stressed-area splits, third-party transfers, treatment scope for priority pollutants, limit-setting approach, non-compliance count, and the main compilation assumptions.
| Destination / category | Volume to non-stressed areas | Volume to water-stressed areas | Total |
|---|---|---|---|
| Rivers and streams | 420,000 | 180,000 | 600,000 |
| Public sewer | 90,000 | 30,000 | 120,000 |
| Coastal waters | 50,000 | 0 | 50,000 |
| Other destinations | 20,000 | 10,000 | 30,000 |
Synthetic example only: we report where our water leaves the site, split by destination and by whether it goes to stressed catchments, and we note the small volume we pass on to another organisation for its own use. We also explain which priority pollutants we treat, how we defined that list, the limit-setting basis, any breaches, and the data boundaries used.
Chemicals · synthetic · written by LRA
This example demonstrates a second plausible reporting style with the same required content, using a different sector and a different mix of destinations and stressed-area volumes.
| Destination / category | Volume to non-stressed areas | Volume to water-stressed areas | Total |
|---|---|---|---|
| Surface water | 260,000 | 140,000 | 400,000 |
| Municipal sewer | 70,000 | 20,000 | 90,000 |
| Ground infiltration | 30,000 | 10,000 | 40,000 |
| Third-party transfer for use | 15,000 | 5,000 | 20,000 |
Synthetic example only: we present the same water-outflow picture for a different type of business, including the share sent to stressed catchments and the small amount transferred to other users. We also state the pollutants covered by treatment, the rule set used to define them, the discharge-limit method, any breaches, and the scope and estimation basis behind the figures.
Draft output & visualisation ideas
How to turn the collected data into a draft disclosure. The charts below are drawn from the illustrative figures above — swap in your own data.
Other views you could build
- Where water left the business — table: A simple summary of total water leaving the organisation, split by destination type, so readers can see the main routes at a glance.
- Water sent on to other organisations — bar: Whether water was passed to third parties for their use, and the volume involved, to show any onward transfer activity.
- Discharge by category — stacked bar: How the overall discharge total is divided across the reporting categories used in the dataset.
- Discharge in water-stressed areas — stacked bar: The amount of water discharged in locations with water stress, broken down by category to highlight exposure in those areas.
- Priority substances covered by treatment — table: Which priority substances of concern had their discharges treated, alongside the definition approach and any external list or criteria used.
- Compliance and limits for priority substances — bar: The number of non-compliance incidents linked to discharge limits for priority substances, with space to compare against the limit-setting approach.
From a number to a disclosure
What separates a figure from a disclosure.
Basic
I discharged 120 megalitres of water in the year.
Better
I discharged 120 megalitres in the year, split across rivers, sewers and a coastal outfall, and 15 megalitres of that went to water-stressed areas.
Best
I discharged 120 megalitres in the year, with 15 megalitres sent to water-stressed areas and 8 megalitres passed on to other organisations for use, and the higher total was mainly due to extra cooling demand at one site and a short maintenance shutdown at another.
Real reports where this topic is disclosed. The confidence label shows how closely each match maps to GRI 303-4 — these are report practice, not exact disclosure examples.
| Company | Sector · Country | Year | Match | Page | Report | Assurance | |||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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ASE Technology Holding Co., Ltd. | Semiconductors · Taiwan | 2024 | Partial | p. 260 →p. 261 →p. 244 → | 2024 CSR Report → | Deloitte | ||||||||||||||||||||||||||||||||||||||||||
Evidence in ASE Technology Holding Co., Ltd.’s reportWhat the report shows ASE Technology Holding Co., Ltd.'s 2024 CSR Report provides numeric data on total water withdrawal and consumption, with specific values reported on pages 244 and 266, including water withdrawal in areas of water stress (p.244) and total water withdrawn (p.266). The report also includes figures on water recycling and reuse rates and mentions internal water quality testing (p.241, p.140). However, narrative explanations, methodologies, and certain detailed disclosures related to water management are either missing or unclear throughout the report.
Evidence-based summary of this company’s own report — not a disclosure template to copy, and not a compliance verdict. Datapoint coverage
Source trail
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MOEVE, S.A. | Oil and Gas · Spain | 2025 | Partial | p. 39 →p. 59 →p. 110 → | Consolidated Management Report 2025 → | EY; BSI | ||||||||||||||||||||||||||||||||||||||||||
Evidence in MOEVE, S.A.’s reportWhat the report shows Moeve, S.A.'s 2025 Consolidated Management Report provides numeric data on freshwater withdrawal in water-stressed areas over the past five years, showing values ranging from 12,506 to 14,723 thousand m3 (p.60). The report also includes figures on water use in stressed areas and overall water consumption (p.110). However, there is no narrative explanation or methodology provided regarding water withdrawal or management practices, and several expected narrative disclosures are missing or unclear.
Evidence-based summary of this company’s own report — not a disclosure template to copy, and not a compliance verdict. Datapoint coverage
Source trail
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Bangchak Corporation Public Company Limited | Oil and Gas · Thailand | 2025 | Partial | p. 159 →p. 160 →p. 161 → | Integrated Sustainability Report 2025 → | EY | ||||||||||||||||||||||||||||||||||||||||||
Evidence in Bangchak Corporation Public Company Limited’s reportWhat the report shows Bangchak Corporation Public Company Limited’s Integrated Sustainability Report 2025 provides numeric data on total water withdrawal and total water consumption for the years 2022 to 2025, with specific figures presented on pages 159 and 161. Additional numeric details on freshwater quality, measured by total dissolved solids, are included on pages 188 and 190, showing zero values across the reported years. However, the report lacks narrative explanations or methodological details related to water management, as no quotable narrative evidence was found.
Evidence-based summary of this company’s own report — not a disclosure template to copy, and not a compliance verdict. Datapoint coverage
Source trail
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Check your understanding
A manufacturing site sends 1,200 m3 of treated process water to a municipal sewer, 300 m3 to a river, and 100 m3 to a third party for reuse. The reporting team has separate logs for each outlet, but the draft only shows the combined figure.How should the team present the discharge figures so the reader can see both the overall amount and where it went?
Model answer. They should show the full discharge total and also break it down by destination type, using categories that make the route of the water clear. The 100 m3 sent to another organisation for use should be identified separately, and the total should still reconcile to 1,600 m3.
Why this matters. Report the overall outflow and the split by where the water ended up, so the route is transparent.
A site in a water-stressed basin discharged 450 m3 during the year, including 120 m3 to a nearby industrial user and 330 m3 to a treatment works. The preparer is unsure whether the stressed-basin amount needs its own breakdown.What should be done with the water-stressed discharge data?
Model answer. The team should disclose the total volume released in the water-stressed area and also explain the categories used for that subset. The stressed-basin figure is not just a note; it needs its own classification so readers can see how that portion was distributed.
Why this matters. If the discharge happened in a stressed area, show both the amount and the way that amount is grouped.
A food processor treats wastewater before release and removes metals and cleaning chemicals above internal thresholds. The draft report says only that the water was treated, without explaining which substances were targeted or how the limits were set.What extra detail is needed about the treatment of substances of concern and the limits applied?
Model answer. The report should name the substances the site treats as priority concerns, explain how those substances were identified, and state what basis was used to set the release limits. If an external list, standard, or set of criteria informed the definition, that basis should be described as well.
Why this matters. When special pollutants are part of the story, explain how they were picked out and how the discharge limits were chosen.
A plant had two exceedances of its discharge limits during the year: one for a cooling-water outlet and one for a wastewater line. The draft includes the count, but no note on how the figures were compiled or whether any third-party water was passed on for use.What should the preparer add so the disclosure is understandable and complete?
Model answer. They should add the context needed to interpret the numbers, including how the data were assembled and any assumptions or boundaries used. If water received from another party was sent on for use by other organisations, that should be stated and quantified separately, and the two non-compliance events should be counted as incidents against the discharge limits.
Why this matters. Add enough background for the numbers to make sense, and separate any onward transfer of received water from the rest of the discharge story.
Analyse this disclosure across real reports
See how companies actually report GRI 303-4 — drawn from their own published reports, with the exact pages, and an LRA AI-assistant that works through it with you. Available to LRA Community members and to students throughout their platform access.
Related framework references
How this disclosure maps across the major reporting frameworks.
→
ESRSRelated
ESRS E3
Water and Marine Resources — closest topical match (post-Omnibus ESRS catalogue).
→
IFRSNo equivalent
—
No direct IFRS S1/S2 topical equivalent.
Related & explore
Questions this page answers
What do I need to gather before drafting GRI 303-4 Water and Effluents on this page?
Start with the page’s datapoints to prepare: total discharge volume, discharge by destination, third-party water transfer and volume, discharge by category, stress-area discharge totals and split, substances treated, substance definition basis, reference list used, limit-setting method, breach count, and compilation notes. The page also has a step-by-step preparation section to help you turn those inputs into a draft. ↑ section
How do I decide the scope for GRI 303-4 Water and Effluents using this guidance page?
Use the page’s plain-language explainer and the preparation steps to set the scope, then make sure your chosen scope is reflected consistently in the discharge totals, destination split, stress-area split, and any third-party water transfer figures. The page also flags limit-setting method and compilation notes as part of the preparation record. ↑ section
Which data owner should provide the discharge by destination and third-party water transfer figures for GRI 303-4?
The page is designed for sustainability, ESG, HR or data owners to work from, so ownership should sit with whoever can source the discharge and transfer data and explain the method used. The evidence pack and compilation notes help show who provided what and how it was compiled. ↑ section
What evidence should I keep to make a GRI 303-4 Water and Effluents disclosure assurance-ready?
The page includes six assurance claims to verify and an evidence pack with five items, so you should keep the supporting records that back up the totals, splits, treatment basis, reference list, and limit-setting approach. The page is set up to help you build an assurance-ready file rather than just a narrative draft. ↑ section
How do I use the Prep & Assurance workbook for GRI 303-4 Water and Effluents?
The Download Centre includes a Prep & Assurance workbook in .xlsx format, which is there to help you organise the datapoints, preparation steps, and assurance checks in one place. The page also offers a printable Library Card in PDF if you want a lighter reference copy. ↑ section
What are the common mistakes to avoid when reporting GRI 303-4 Water and Effluents?
The page has a section on common reporting gaps and mistakes, so it is worth checking your draft against that before you finalise it. In practice, that means making sure your totals, splits, treatment basis, and notes all line up and are supported by evidence. ↑ section
Can I use the synthetic example on the GRI 303-4 Water and Effluents page as a template for my own disclosure?
Yes, but only as a synthetic illustration: it is there to show how the disclosure can look, including a quantitative table and draft narrative ideas. You should replace it with your own data and keep the numbers internally consistent. ↑ section
What should the narrative section of a GRI 303-4 Water and Effluents draft include?
The page’s draft-output section gives narrative starters, visualisation ideas, and a GRI content-index line to help you turn the data into a report-ready draft. Use those prompts to explain the totals, destination split, stress-area split, and any notable treatment or breach information. ↑ section
How do I write the GRI content-index line for the Water and Effluents disclosure from this page?
The page includes a draft-output section with a GRI content-index line, so you can use that as the starting point for your report index entry. Keep it aligned to the data you have prepared and the scope you have documented on the page. ↑ section
How does the ESRS E3 Water and Marine Resources reference help me with GRI 303-4 Water and Effluents?
The page says ESRS E3 is the closest correspondence, which can help you spot where data may be reusable across frameworks. It does not say the requirements are identical, so you still need to check the page’s own datapoints and method notes for this disclosure. ↑ section
More questions this page can help with
- GRI 303-4 Water and Effluents checklist for total discharge volume and discharge by destination
- How to collect third-party water transfer data for GRI 303-4 Water and Effluents
- What is the limit-setting method in the GRI 303-4 Water and Effluents workbook
- How to document substances treated for GRI 303-4 Water and Effluents
- GRI 303-4 Water and Effluents evidence pack items for assurance
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Sources, status and disclaimer
This LRA assistance tool is designed for educational and internal data-collection purposes. It is not an official interpretation of the GRI Standards, IFRS Sustainability Disclosure Standards or EU CSRD/ESRS requirements. When applying these frameworks in professional practice, users should consult and double-check the official standards, guidance and applicable regulatory sources.
