Environmental concerns rise over saltwater wedge impact on drinking water supplies

May 29, 2025 | 2025 Legislature LA, Louisiana


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Environmental concerns rise over saltwater wedge impact on drinking water supplies
In a meeting filled with urgency and concern, Louisiana lawmakers gathered to address pressing environmental issues affecting the state’s waterways and communities. The atmosphere was charged as representatives discussed the alarming saltwater wedge creeping into the Mississippi River, threatening drinking water supplies for Jefferson, Plaquemines, and Orleans parishes.

One speaker, emphasizing the gravity of the situation, urged colleagues to slow down and consider the implications of their decisions. The saltwater intrusion not only jeopardizes drinking water but also raises significant environmental concerns. An engineer highlighted the need for extensive environmental assessments on gas and storage pits in Barataria, where 16 pits have been identified for removal. The estimated cost for this cleanup is around $100 million, as these pits, previously closed with fly ash, risk leaching harmful materials into the water when the water level rises.

The discussion also touched on the impact of flooding in areas like Grand Isle and Lafitte, particularly during south winds. Local officials, including the mayor of Grand Isle, were present to provide firsthand accounts of the flooding challenges their communities face. The potential for hypoxia—a condition where water bodies become depleted of oxygen—was another critical point of concern, with predictions of its occurrence north of Grand Isle and other key areas.

Lawmakers were reminded of the ongoing legal battles surrounding land expropriation, with seven lawsuits already filed by property owners who feel their land has been undervalued. The conversation shifted to the presence of PFAS, known as "forever chemicals," detected in drinking water in Plaquemines Parish, prompting calls for further study and action.

As the meeting progressed, the financial implications of proposed projects were laid bare. A smaller diversion project, previously approved by Congress, could save the state an estimated $11 billion, not including additional savings from dredging efforts. The urgency of these discussions underscored the delicate balance between environmental stewardship and the economic realities facing Louisiana’s coastal communities.

As the meeting concluded, it was clear that the path forward would require careful consideration of both environmental and economic factors, with the future of Louisiana’s waterways hanging in the balance.

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