Qualla: Munster Blackwater

Munster Blackwater: Introduction

Sat, 23 May 2026 00:00:00 GMT

Photo credit Seighean (talk), Public domain. On 9 August 2025, anglers walking the bank of the Munster Blackwater began to see something they had never seen before: salmon and brown trout floating belly-up by the hundreds, by the thousands. By the time the count was over, an estimated 32,000 fish had died. Tests found no disease, no chemicals, no pesticides, no heavy metals. Whatever passed through this river in August 2025 left no signature behind. It was the largest fish kill in the history of the Irish State - and it happened on a river the locals call An Abhainn Mhór, The Great River.

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Image: Seighean (talk) | Public domain

Munster Blackwater: Three Counties to the Sea

Sat, 23 May 2026 00:00:00 GMT

Photo credit Snapshots Of The Past, CC BY-SA 2.0. The Blackwater rises in the Mullaghareirk Mountains of County Kerry and runs 169 kilometres east before turning sharply south at Cappoquin and emptying into Youghal Harbour on the Celtic Sea. It drains 3,324 square kilometres of mostly pastoral country, with a long-term average f...

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Image: Snapshots Of The Past | CC BY-SA 2.0

Munster Blackwater: The Salmon River

Sat, 23 May 2026 00:00:00 GMT

Photo credit Nicholas Hilliard, Public domain. For centuries the Blackwater was synonymous with salmon. In 1834 there were 250 fishing boats at Youghal employing 2,500 men, and salmon was sold on the quayside at one penny per pound weight. Even the disputes were about fish. In 1882 the House of Lords confirmed that the Duke o...

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Image: Nicholas Hilliard | Public domain

Munster Blackwater: A Birdwatcher's Estuary

Sat, 23 May 2026 00:00:00 GMT

Photo credit Robert Ashby, CC BY-SA 2.0. The lower river is a Special Protection Area under the EU Birds Directive, stretching from Youghal New Bridge to the Ferry Point peninsula. The mudflats of the estuary draw waders and wildfowl in numbers that matter on an international scale. The SPA hosts internationally importa...

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Image: Robert Ashby | CC BY-SA 2.0

Munster Blackwater: The Mystery of August 2025

Sat, 23 May 2026 00:00:00 GMT

Photo credit Fattonyni, CC BY-SA 3.0. Then the fish kill. After the bodies were counted, the investigation by Inland Fisheries Ireland and a multi-agency taskforce ran for weeks and concluded with the unsatisfying verdict that the pollutant could not be identified. On 13 September 2025, the journalist Ella McSweeney ...

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Image: Fattonyni | CC BY-SA 3.0

Munster Blackwater: Sondes in the Water

Sat, 23 May 2026 00:00:00 GMT

Photo credit Colin Park, CC BY-SA 2.0. When agencies fail, citizens improvise. After the kill, local angling clubs installed their own water-quality sensors - "sondes" - running year-round, twenty-four hours a day, taking readings nobody had been taking before. It was a quiet act of independence on a river that had sp...

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Image: Colin Park | CC BY-SA 2.0