Nitrates Priority Protection Zones in the department of Orne.

Nitrates Priority Protection Areas (NPAs) are defined within vulnerable areas in the action programmes taken under the Nitrates Directive in vulnerable areas (as well as CACs (layer #65) and SEZs (layer #67)).This is a zoning specific to the Seine Normandy Basin. They correspond to spaces that combine high vulnerability to nitrates and a high stake in drinking water supply. The NPAs are regional specificities and are defined by prefectural decrees.硝酸盐优先保护区（Nitrates Priority Protection Areas，NPAs）的划定范围，涵盖《硝酸盐指令》框架下针对脆弱区域（同时包含图层#65的CAC与图层#67的SEZ）制定的行动方案中所界定的脆弱区域。该区划为塞纳河诺曼底盆地专属分区，对应同时具备硝酸盐污染高脆弱性与饮用水供应保障高战略重要性的空间范围。硝酸盐优先保护区具备区域特异性，由省级政令予以明确划定。