In a decision issued on April 12, 2018, a Fourth Circuit panel held (2-1) that (1) even though a pipeline leak has been repaired and remediation is ongoing under the supervision of the state environmental agency, environmental groups have standing to sue the pipeline owner, and (2) plaintiffs’ allegation that groundwater continues to carry discharged pollutants to jurisdictional waters through a “direct hydrological connection” supports liability under the Clean Water Act.

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