Map Viewing Service (WMS) of the dataset: Arrow FNIPP Restricted Area in Sarthe.

For natural PPRs, the Environmental Code defines two categories of zones (L562-1):
risk-exposed areas and areas that are not directly exposed to risks but where measures can be foreseen to avoid exacerbating the risk.Depending on the hazard level, each area is subject to an enforceable settlement.
The regulations generally distinguish three types of areas:1- ‘Building prohibited areas’, so-called ‘red areas’, where the hazard level is high and the general rule is the construction ban;2- ‘prescription areas’, known as ‘blue zones’, where the hazard level is medium and projects are subject to requirements adapted to the type of issue; 3- areas not directly exposed to risks but where constructions, works, developments or farms, agricultural, forestry, crafts, commercial or industrial could aggravate risks or cause new ones, subject to prohibitions or requirements (cf. Article L562-1 of the Environmental Code).
The latter category applies only to natural RPPs.

针对自然PPR区域（PPRs），《环境法典》（Environmental Code）第L562-1条将其划分为两类区划：风险暴露区，以及虽未直接面临风险但可采取措施规避风险加剧的区域。依据危险等级的不同，每类区域均需遵守可强制执行的管控要求。
该法规通常区分三类区域：
1. “禁止建设区”（又称“红色区域”）：此类区域危险等级较高，基本原则为禁止建设活动；
2. “规限建设区”（亦称“蓝色区域”）：危险等级为中等，区内建设项目需根据风险类型适配相应合规要求；
3. 虽未直接面临风险，但建设工程、开发活动或农业、林业、手工业、商业及工业场所可能加剧既有风险或引发新风险的区域，此类区域需遵守相关禁令或合规要求（参见《环境法典》第L562-1条）。
该第三类区划仅适用于自然RPP区域（RPPs）。