In the Jura valley of eastern France, forty hectares of land have turned into a "dead zone," where aquatic life has largely disappeared. Hundreds of trout, once abundant in the region's rivers and streams, have vanished due to severe water pollution linked to a traditional wood treatment method. This method, used for over a century, involves submerging logs in water to protect them from scolyte beetles—pests that can destroy spruce forests. While the wood industry has been working to recover from scolyte infestations, a new environmental challenge has emerged downstream of sawmills, where water quality has deteriorated due to this practice. The technique of continuously spraying logs with water has been used since the early 20th century. It helps prevent splitting, staining, and fungal growth on wood, and it also deters xylophagous insects—those that feed on wood. This method saw a resurgence in recent years due to the spread of scolyte beetles, which have caused significant damage to spruce forests in northeastern France. As a result, hundreds of thousands of cubic meters of wood have been treated with this method, both in the northeast and southwest of the country. In the Doubs region, near the Jura, the wood industry faced an urgent need to remove infected spruces from forests before they lost all commercial value, leading to a rapid expansion of temporary storage areas where logs are sprayed. The water used in this process accumulates tannins and organic matter from the bark and cut wood. When this water is discharged into nearby streams and rivers, it can become toxic to aquatic life. As organic matter decomposes, it consumes dissolved oxygen, a process known as deoxygenation. For sensitive species like trout, which rely on high oxygen levels, this can be fatal within hours. In the Jura valley, the proliferation of these spraying storage areas has led to the collapse of fish populations, with entire sections of the valley turning into lifeless "dead zones." Environmental regulators have acknowledged the issue, but the spraying method, viewed as a mechanical rather than chemical treatment, has not faced the same strict regulations as chemical processes. Wet storage is now recognized as a source of water quality problems, requiring the treatment of discharged water before it is returned to the environment. However, implementing filtration systems is both complex and expensive, especially for temporary storage areas set up in a rush. Additionally, handling waterlogged logs poses physical risks to workers due to the weight and slipperiness of the wood. The wood industry now finds itself caught between an economic need to protect its products from pests and the growing challenge of environmental responsibility. The situation in the Jura highlights the delicate balance of ecosystems, where solutions to one problem can create another. As climate change continues to stress waterways, the question remains: is it time to rethink how these storage areas are managed before more valleys face the same ecological crisis?