Fourth river pollution conviction in 10 years

“Hopefully this will be the last time,” warned Judge Raymond Finnegan, handing down yet another conviction to Uisce Éireann over a significant pollution event at Ballinagh wastewater treatment plant - an incident that wiped out aquatic life and marked the fourth environmental breach at the site in just a decade.

More than a thousand fish - brown trout, stickleback, minnow and roach - were left dead, floating lifelessly on the water or strewn along the banks of the Ballinagh River after contamination from the local plant in July 2025. The source was traced to a failure within the facility’s reed bed system, which allowed “untreated” discharge to seep unchecked into the river, an important tributary in the wider Erne catchment system.

Ailish Keane, Environmental Officer with Inland Fisheries Ireland, told Cavan District Court how she arrived at the scene on July 8 to find the river running an unnatural, murky brown. She took three samples - downstream, at a discharge pipe connected to the wastewater treatment plant (WWTP), and a third upstream. While charging her car nearby, she was alerted by a member of the public that the river had “gone brown again”. She returned to take further samples, and recorded “elevated” ammonia levels - echoing similar findings from just days earlier, July 4.

By July 13, the situation had escalated. Inland Fisheries Ireland (IFI) received a fresh reports: The river was now “very brown,” with “hundreds of dead fish”.

Ms Keane returned and documented the scene, presenting stark photographic comparisons to the court.

“There was nothing done,” Judge Finnegan remarked pointedly. Ms Keane, giving evidence, agreed. She described dead trout lining the banks near a local amenity park, while the riverbed itself was choked with a “grey sewage fungus”.

“What should be green was grey,” she explained.

The court heard the incident stemmed from a blockage in the WWTP’s reed bed. When Ms Keane visited the plant, she found maintenance underway on the filtration system and ordered it to stop immediately. Once halted, the pollution ceased within an hour.

Despite Uisce Éireann’s guilty plea, Ms Keane warned of “ongoing issues” at the ageing Ballinagh facility, which she said is now in urgent need of an upgrade. Legal counsel for the Uisce Éireann (UÉ) outlined planned mitigation measures, including a €2M investment in modular treatment units by early 2027, ahead of a proposed full replacement plant by 2030 or 2031 - at an estimated cost of €20-25 million, pending approvals.

The court also heard that the plant, originally built in the 1960s, has undergone some mechanical and electrical upgrades, alongside revised staffing, monitoring, and maintenance protocols.

“That’s all marvellous,” Judge Finnegan responded sharply, questioning what protections are in place in the meantime.

“It took the pollution and elimination of an entire ecosystem just to get these changes in the first place.”

“This isn’t the first time we’ve been on this rodeo,” he added, noting the utility’s history of offences.

Previous convictions in 2016 and 2019 resulted in fines for similar pollution events on the same river. The maximum penalty available to the court is €5,000. It was shared that UÉ has further proposed a €15,000 restitution fund to create new spawning habitats along the Ballinagh River. But Ms Keane cautioned that recovery will be slow: Even if fish spawn successfully next winter, it will take “years” for stocks to return to pre-incident levels.

The judge was unequivocal in his assessment: Uisce Éireann had failed to take past warnings seriously. “Leniency is limited by the lack of action,” he commented, imposing fines of €4,000 on each of two charges of causing deleterious matter to enter the river on July 8 and 13, striking out a third charge from July 4 but awarding total costs of nearly €7,000.