{ "id": "AIBD-0205", "title": "Southern Water's sewer-monitor anomaly model flagged a forming fatberg in Rowner, Gosport, and a crew cleared it before any overflow into the River Alver", "summary": "Southern Water's AI sewer monitors flagged a forming fatberg in Rowner, Gosport; a crew cleared it before any overflow into the River Alver.", "date_observed": "2026-04-22", "date_basis": "unassessed", "date_precision": "unassessed", "benefit_status": null, "source_collection": null, "source_entry": null, "account": "Southern Water runs around 34,000 sewer level monitors with machine learning. Its proactive operations control manager Daniel McElhinney says the system learns the normal behavior of sewers. He says it can tell a forming blockage from daily rushes or rain. Shortly before 22 April 2026 the sensors detected an abnormal flow in Rowner, Gosport, and alerted the control room. A crew jetted the sewer and found a fatberg of wet wipes and other unflushable items. The company said that, left unchecked, the sewer could have overflowed from a manhole into a surface water drain leading to the River Alver. The case was reported on 22 April 2026. A second flagged blockage at Warlands Lane, Shalfleet, Isle of Wight, was reported on 23 April.", "category": "protective response", "unexpected": false, "purpose": "The monitors and the anomaly model were installed to spot blockages and leaks forming in sewers. Crews can then clear them before they cause pollution or flooding. This case was that intended use.", "system": "Southern Water's AI-enabled digital sewer system: a network of around 34,000 sewer level monitors in blockage hotspots with machine learning that learns normal sewer behavior and flags a forming blockage", "model_version": null, "developer": null, "deployer": "Southern Water", "location": "Gosport, United Kingdom", "domain": "Wastewater networks / pollution prevention", "segment": "Regulated water and wastewater utility", "benefit_type": "Improved Environmental Sustainability", "taxonomy_note": "A sewage overflow averted is pollution prevented, which Trustible's description does not name.", "registry_ids": { "oecd_aim": "2026-04-22-7047" }, "ratings": [ { "group": "societal", "depth": 2, "reason": "The company says a sewage overflow into the River Alver was averted. The Andover Advertiser says the river is home to herons, water voles and kingfishers. The counterfactual is asserted rather than shown, and no pollution occurred. This is a specific avoided harm of unmeasured size." }, { "group": "organizational", "depth": 1, "reason": "Southern Water cleared one blockage before it became a pollution incident or a customer flooding. The company says blocked sewers are the leading cause of its pollution incidents. This is one of the more than 4,000 interventions it reports in a year." } ], "ai_role": { "status": "assessed", "statement": "The level monitors detected an abnormal flow at Rowner. The machine-learning model raised the alert to the control room; by the company's account it distinguishes a forming blockage from daily rushes and rainfall. The jetting crew found and removed the fatberg. The articles are built on a Southern Water statement and a single quoted manager. They do not name the developer of the model and give no sensor data. No independent party confirmed that an overflow was imminent." }, "evidence": [ { "kind": "news report", "citation": "Southern Daily Echo (2026). Fatberg found in Gosport removed before causing damage. dailyecho.co.uk, 23 April 2026; reproduces a Southern Water statement.", "title": "Fatberg found in Gosport removed before causing damage", "url": "https://www.dailyecho.co.uk/news/26045031.fatberg-found-gosport-removed-causing-damage/", "date": "2026-04-23", "written_by": "independent", "quote": "Southern Water prevented sewage pollution of the River Alver in Gosport with the help of its AI-enabled digital sewer system and rapid action from its teams." }, { "kind": "news report", "citation": "Andover Advertiser (2026). Southern Water using AI to prevent pollution incidents. andoveradvertiser.co.uk, 25 April 2026; reproduces a Southern Water statement.", "title": "Southern Water using AI to prevent pollution incidents", "url": "https://www.andoveradvertiser.co.uk/news/26046397.southern-water-using-ai-prevent-pollution-incidents/", "date": "2026-04-25", "written_by": "independent", "quote": "Southern Water's AI technology detected a fatberg forming in Rowner, Gosport, before it could pollute the River Alver last week." }, { "kind": "news report", "citation": "Island Echo (2026). AI sewer tech prevents fatberg from polluting chalk stream in Calbourne. islandecho.co.uk, 23 April 2026; the second flagged blockage, with the same Southern Water quote.", "title": "AI sewer tech prevents fatberg from polluting chalk stream in Calbourne", "url": "https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/", "date": "2026-04-23", "written_by": "independent", "quote": "The issue at Warlands Lane, Shalfleet was identified using Southern Water's network of around 34,000 sewer level monitors, which continuously track flows and detect unusual activity" } ], "replication": { "produced_by": [ "Level monitors in sewer blockage hotspots feeding a model that has learned the sewer's normal flow pattern and flags deviations from it", "A staffed control room that receives the alert and can dispatch a jetting crew quickly" ], "must_hold": [ "The flagged anomaly is a forming blockage rather than rain or a daily peak, which the company says the model distinguishes but for which no accuracy figures are given", "A crew reaches the site before the sewer surcharges; the articles do not say how long that took here", "The overflow route the company describes (manhole to surface water drain to river) exists as stated; it is the company's own account" ], "echoes": [] }, "paired_incident": null, "headline": "Southern Water's sewer monitors flag a fatberg before overflow", "metric": null, "comparator": { "against": "the previous reactive practice of attending blockages after a flooding or pollution event", "before": "turning up after the event to clean up and commiserate with devastated customers", "after": "spotting hundreds of potential blockages before it is too late", "basis": "assumed", "quote": "\"Instead of turning up after the event to clean up and commiserate with devastated customers we're spotting hundreds of potential blockages before it's too late.\"", "url": "https://www.dailyecho.co.uk/news/26045031.fatberg-found-gosport-removed-causing-damage/" }, "later": { "status": "persisted", "date": "2026-04-23", "note": "The next day the same monitor network flagged a second forming fatberg at Warlands Lane, Shalfleet, on the Isle of Wight, which crews cleared before it reached the Caul Bourne chalk stream.", "quote": "The issue at Warlands Lane, Shalfleet was identified using Southern Water’s network of around 34,000 sewer level monitors, which continuously track flows and detect unusual activity that may indicate a blockage or leak. As the fatberg began to form, sensors alerted the control room, prompting a swift response.", "url": "https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/" }, "value": null, "developer_country": null, "deployer_country": "United Kingdom", "unrated_because": null, "brief_notes": null, "brief": null, "revisions": [ { "date": "2026-10-20", "change": "Record drafted from the OECD Monitor entry and the cited sources.", "source": "https://oecd.ai/en/incidents/2026-04-22-7047", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Added what the benefit is measured against, what happened since from the cited sources.", "source": "https://www.dailyecho.co.uk/news/26045031.fatberg-found-gosport-removed-causing-damage/; https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Country of the deployer added from the organization's own site or a registry.", "source": "https://en.wikipedia.org/wiki/Southern_Water", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Prose pass: a rating reason, account, purpose, the system's part rewritten in shorter sentences with abbreviations expanded; facts, figures and quotations unchanged.", "source": null, "editor": "AIBD" } ], "confidence": "reported", "shade": "medium", "claim_status": "Independently reported", "claim_basis": "Sources: three independent news reports. The cited evidence includes no independent study or report and no finding by a regulator or court.", "profile": { "case_id": "AIBD-0205", "catalog_version": "1.0.0", "source_fingerprint": "d37052488798e332c79e45b266c0729c2f981e8be35ae9795e110e247cccd2d6", "collection_refs": [ { "collection_id": "aibd", "version": "snapshot-8bf7cfec9cb185aa" }, { "collection_id": "aibd", "version": "2026-10-25" }, { "collection_id": "adyt", "version": "2026-10-25" }, { "collection_id": "chanticleer", "version": "2026-10-25" } ], "source_ids": [ "AIBD-0205-source-0001", "AIBD-0205-source-0002", "AIBD-0205-source-0003" ], "families": { "strategic assessments": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial", "record_ids": [] }, "evaluations": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial", "record_ids": [] }, "monetary observations": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial", "record_ids": [] }, "institutional decisions": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial", "record_ids": [] } }, "fields": { "actors[]": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "deployer": "Southern Water" } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "deployer" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "actors[].ownership_control": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "ai_contribution": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "ai_role": { "status": "assessed", "statement": "The level monitors detected an abnormal flow at Rowner. The machine-learning model raised the alert to the control room; by the company's account it distinguishes a forming blockage from daily rushes and rainfall. The jetting crew found and removed the fatberg. The articles are built on a Southern Water statement and a single quoted manager. They do not name the developer of the model and give no sensor data. No independent party confirmed that an overflow was imminent." } } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "ai_role" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "ai_relationship": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "category": "protective response", "ai_role": { "status": "assessed", "statement": "The level monitors detected an abnormal flow at Rowner. The machine-learning model raised the alert to the control room; by the company's account it distinguishes a forming blockage from daily rushes and rainfall. The jetting crew found and removed the fatberg. The articles are built on a Southern Water statement and a single quoted manager. They do not name the developer of the model and give no sensor data. 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around 34,000 sewer level monitors, which continuously track flows and detect unusual activity that may indicate a blockage or leak. As the fatberg began to form, sensors alerted the control room, prompting a swift response.", "url": "https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/" } } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "later" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "human_oversight": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "id": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "id": "AIBD-0205" } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "id" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "infrastructure_dependencies[]": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].beneficiaries": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].beneficiary_count": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].benefit_type": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "benefit_type": "Improved Environmental Sustainability", "taxonomy_note": "A sewage overflow averted is pollution prevented, which Trustible's description does not name." } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "benefit_type", "taxonomy_note" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "outcomes[].claim": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "account": "Southern Water runs around 34,000 sewer level monitors with machine learning. Its proactive operations control manager Daniel McElhinney says the system learns the normal behavior of sewers. He says it can tell a forming blockage from daily rushes or rain. Shortly before 22 April 2026 the sensors detected an abnormal flow in Rowner, Gosport, and alerted the control room. A crew jetted the sewer and found a fatberg of wet wipes and other unflushable items. The company said that, left unchecked, the sewer could have overflowed from a manhole into a surface water drain leading to the River Alver. The case was reported on 22 April 2026. A second flagged blockage at Warlands Lane, Shalfleet, Isle of Wight, was reported on 23 April.", "benefit_type": "Improved Environmental Sustainability" } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "account", "benefit_type" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "outcomes[].distribution": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].duration": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].id": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].stakeholder_group": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "ratings": [ { "group": "societal", "depth": 2, "reason": "The company says a sewage overflow into the River Alver was averted. The Andover Advertiser says the river is home to herons, water voles and kingfishers. The counterfactual is asserted rather than shown, and no pollution occurred. This is a specific avoided harm of unmeasured size." }, { "group": "organizational", "depth": 1, "reason": "Southern Water cleared one blockage before it became a pollution incident or a customer flooding. The company says blocked sewers are the leading cause of its pollution incidents. This is one of the more than 4,000 interventions it reports in a year." } ] } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "ratings" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "outcomes[].status": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].tradeoffs": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "outcomes[].unexpected": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "unexpected": false, "purpose": "The monitors and the anomaly model were installed to spot blockages and leaks forming in sewers. Crews can then clear them before they cause pollution or flooding. This case was that intended use." } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "unexpected", "purpose" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "places[]": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "location": "Gosport, United Kingdom", "deployer_country": "United Kingdom" } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "location", "deployer_country" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "purpose": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "purpose": "The monitors and the anomaly model were installed to spot blockages and leaks forming in sewers. Crews can then clear them before they cause pollution or flooding. This case was that intended use." } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "purpose" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "record_dates": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "date_observed": "2026-04-22", "revisions": [ { "date": "2026-10-20", "change": "Record drafted from the OECD Monitor entry and the cited sources.", "source": "https://oecd.ai/en/incidents/2026-04-22-7047", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Added what the benefit is measured against, what happened since from the cited sources.", "source": "https://www.dailyecho.co.uk/news/26045031.fatberg-found-gosport-removed-causing-damage/; https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Country of the deployer added from the organization's own site or a registry.", "source": "https://en.wikipedia.org/wiki/Southern_Water", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Prose pass: a rating reason, account, purpose, the system's part rewritten in shorter sentences with abbreviations expanded; facts, figures and quotations unchanged.", "editor": "AIBD" } ] } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "date_observed", "revisions" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "replication.attempts[]": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "replication.conditions": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "replication": { "produced_by": [ "Level monitors in sewer blockage hotspots feeding a model that has learned the sewer's normal flow pattern and flags deviations from it", "A staffed control room that receives the alert and can dispatch a jetting crew quickly" ], "must_hold": [ "The flagged anomaly is a forming blockage rather than rain or a daily peak, which the company says the model distinguishes but for which no accuracy figures are given", "A crew reaches the site before the sewer surcharges; the articles do not say how long that took here", "The overflow route the company describes (manhole to surface water drain to river) exists as stated; it is the company's own account" ], "echoes": [] } } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "replication" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "revision_history[]": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "revisions": [ { "date": "2026-10-20", "change": "Record drafted from the OECD Monitor entry and the cited sources.", "source": "https://oecd.ai/en/incidents/2026-04-22-7047", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Added what the benefit is measured against, what happened since from the cited sources.", "source": "https://www.dailyecho.co.uk/news/26045031.fatberg-found-gosport-removed-causing-damage/; https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Country of the deployer added from the organization's own site or a registry.", "source": "https://en.wikipedia.org/wiki/Southern_Water", "editor": "AIBD" }, { "date": "2026-10-21", "change": "Prose pass: a rating reason, account, purpose, the system's part rewritten in shorter sentences with abbreviations expanded; facts, figures and quotations unchanged.", "editor": "AIBD" } ] } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "revisions" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "sector": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "domain": "Wastewater networks / pollution prevention", "segment": "Regulated water and wastewater utility" } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "domain", "segment" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "sources[].access_version": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "sources[].citation_locator": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "evidence": [ { "kind": "news report", "citation": "Southern Daily Echo (2026). Fatberg found in Gosport removed before causing damage. dailyecho.co.uk, 23 April 2026; reproduces a Southern Water statement.", "title": "Fatberg found in Gosport removed before causing damage", "url": "https://www.dailyecho.co.uk/news/26045031.fatberg-found-gosport-removed-causing-damage/", "date": "2026-04-23", "written_by": "independent", "quote": "Southern Water prevented sewage pollution of the River Alver in Gosport with the help of its AI-enabled digital sewer system and rapid action from its teams." }, { "kind": "news report", "citation": "Andover Advertiser (2026). Southern Water using AI to prevent pollution incidents. andoveradvertiser.co.uk, 25 April 2026; reproduces a Southern Water statement.", "title": "Southern Water using AI to prevent pollution incidents", "url": "https://www.andoveradvertiser.co.uk/news/26046397.southern-water-using-ai-prevent-pollution-incidents/", "date": "2026-04-25", "written_by": "independent", "quote": "Southern Water's AI technology detected a fatberg forming in Rowner, Gosport, before it could pollute the River Alver last week." }, { "kind": "news report", "citation": "Island Echo (2026). AI sewer tech prevents fatberg from polluting chalk stream in Calbourne. islandecho.co.uk, 23 April 2026; the second flagged blockage, with the same Southern Water quote.", "title": "AI sewer tech prevents fatberg from polluting chalk stream in Calbourne", "url": "https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/", "date": "2026-04-23", "written_by": "independent", "quote": "The issue at Warlands Lane, Shalfleet was identified using Southern Water's network of around 34,000 sewer level monitors, which continuously track flows and detect unusual activity" } ] } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "evidence" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "sources[].id": { "state": "value_present", "value": { "kind": "identifiers", "identifiers": [ "AIBD-0205-source-0001", "AIBD-0205-source-0002", "AIBD-0205-source-0003" ], "role": "Existing evidence items, in their original order" }, "provenance": { "kind": "curatorial", "basis": "Stable within the fingerprinted record version; no source content or source review has been added.", "record_fields": [], "source_refs": [] }, "review_state": "record_mapped", "coverage": "complete" }, "sources[].language": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "sources[].relationship": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "evidence": [ { "kind": "news report", "citation": "Southern Daily Echo (2026). Fatberg found in Gosport removed before causing damage. dailyecho.co.uk, 23 April 2026; reproduces a Southern Water statement.", "title": "Fatberg found in Gosport removed before causing damage", "url": "https://www.dailyecho.co.uk/news/26045031.fatberg-found-gosport-removed-causing-damage/", "date": "2026-04-23", "written_by": "independent", "quote": "Southern Water prevented sewage pollution of the River Alver in Gosport with the help of its AI-enabled digital sewer system and rapid action from its teams." }, { "kind": "news report", "citation": "Andover Advertiser (2026). Southern Water using AI to prevent pollution incidents. andoveradvertiser.co.uk, 25 April 2026; reproduces a Southern Water statement.", "title": "Southern Water using AI to prevent pollution incidents", "url": "https://www.andoveradvertiser.co.uk/news/26046397.southern-water-using-ai-prevent-pollution-incidents/", "date": "2026-04-25", "written_by": "independent", "quote": "Southern Water's AI technology detected a fatberg forming in Rowner, Gosport, before it could pollute the River Alver last week." }, { "kind": "news report", "citation": "Island Echo (2026). AI sewer tech prevents fatberg from polluting chalk stream in Calbourne. islandecho.co.uk, 23 April 2026; the second flagged blockage, with the same Southern Water quote.", "title": "AI sewer tech prevents fatberg from polluting chalk stream in Calbourne", "url": "https://www.islandecho.co.uk/ai-sewer-tech-prevents-fatberg-from-polluting-chalk-stream-in-calbourne/", "date": "2026-04-23", "written_by": "independent", "quote": "The issue at Warlands Lane, Shalfleet was identified using Southern Water's network of around 34,000 sewer level monitors, which continuously track flows and detect unusual activity" } ] } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "evidence" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "sources[].upstream_sources": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "strategic_assessments[]": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial", "family": "strategic assessments" }, "summary": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "summary": "Southern Water's AI sewer monitors flagged a forming fatberg in Rowner, Gosport; a crew cleared it before any overflow into the River Alver.", "account": "Southern Water runs around 34,000 sewer level monitors with machine learning. Its proactive operations control manager Daniel McElhinney says the system learns the normal behavior of sewers. He says it can tell a forming blockage from daily rushes or rain. Shortly before 22 April 2026 the sensors detected an abnormal flow in Rowner, Gosport, and alerted the control room. A crew jetted the sewer and found a fatberg of wet wipes and other unflushable items. The company said that, left unchecked, the sewer could have overflowed from a manhole into a surface water drain leading to the River Alver. The case was reported on 22 April 2026. A second flagged blockage at Warlands Lane, Shalfleet, Isle of Wight, was reported on 23 April." } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "summary", "account" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "systems[].autonomy_permissions": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "systems[].component_role": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "systems[].deployment_configuration": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "systems[].inputs_outputs": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "systems[].model_name": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "systems[].model_version": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "systems[].product_name": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "system": "Southern Water's AI-enabled digital sewer system: a network of around 34,000 sewer level monitors in blockage hotspots with machine learning that learns normal sewer behavior and flags a forming blockage" } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "system" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "systems[].provider": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "taxonomy_crosswalks[]": { "state": "not_assessed", "review_state": "not_assessed", "coverage": "partial" }, "title": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "title": "Southern Water's sewer-monitor anomaly model flagged a forming fatberg in Rowner, Gosport, and a crew cleared it before any overflow into the River Alver", "headline": "Southern Water's sewer monitors flag a fatberg before overflow" } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "title", "headline" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" }, "version": { "state": "value_present", "value": { "kind": "identifiers", "identifiers": [ "d37052488798e332c79e45b266c0729c2f981e8be35ae9795e110e247cccd2d6" ], "role": "SHA-256 of normalized original case data" }, "provenance": { "kind": "curatorial", "basis": "Deterministic content version assigned by the local migration.", "record_fields": [], "source_refs": [] }, "review_state": "record_mapped", "coverage": "complete" }, "workflow": { "state": "value_present", "value": { "kind": "record_fields", "fields": { "account": "Southern Water runs around 34,000 sewer level monitors with machine learning. Its proactive operations control manager Daniel McElhinney says the system learns the normal behavior of sewers. He says it can tell a forming blockage from daily rushes or rain. Shortly before 22 April 2026 the sensors detected an abnormal flow in Rowner, Gosport, and alerted the control room. A crew jetted the sewer and found a fatberg of wet wipes and other unflushable items. The company said that, left unchecked, the sewer could have overflowed from a manhole into a surface water drain leading to the River Alver. The case was reported on 22 April 2026. A second flagged blockage at Warlands Lane, Shalfleet, Isle of Wight, was reported on 23 April.", "replication": { "produced_by": [ "Level monitors in sewer blockage hotspots feeding a model that has learned the sewer's normal flow pattern and flags deviations from it", "A staffed control room that receives the alert and can dispatch a jetting crew quickly" ], "must_hold": [ "The flagged anomaly is a forming blockage rather than rain or a daily peak, which the company says the model distinguishes but for which no accuracy figures are given", "A crew reaches the site before the sewer surcharges; the articles do not say how long that took here", "The overflow route the company describes (manhole to surface water drain to river) exists as stated; it is the company's own account" ], "echoes": [] } } }, "provenance": { "kind": "legacy_record", "basis": "Preserved from the existing AIBD record; external sources were not rechecked.", "record_fields": [ "account", "replication" ], "source_refs": [] }, "review_state": "record_mapped", "coverage": "partial" } }, "summary": { "total": 91, "addressed": 91, "known": 28, "reviewed": 0, "record_mapped": 28, "not_assessed": 63, "complete": false, "by_state": { "value_present": 28, "not_reported": 0, "unresolved": 0, "not_assessed": 63, "not_applicable": 0, "withheld": 0, "source_unavailable": 0 } } } }