Map Viewing Service (WMS) of the dataset: Lude PPRMT Regulated 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PPRs（natural PPRs），《环境法典》第L562-1条划定了两类区域：风险暴露区域，以及虽未直接面临风险但可通过预先采取措施避免风险加剧的区域。
依据危险等级，每类区域均需执行强制性土地利用管控要求。
相关法规通常将区域划分为以下三类：1- “禁止建设区”，亦称“红色区域”，该区域危险等级较高，核心管控规则为禁止建设活动；2- “限制建设区”，亦称“蓝色区域”，该区域危险等级为中等，相关建设项目需适配问题类型的管控要求；3- 虽未直接面临风险，但建设工程、开发项目或农业、林业、手工业、商业、工业类经营场所或农场可能加剧既有风险或引发新风险的区域，需遵守相关禁止性规定或管控要求（详见《环境法典》第L562-1条）。
上述第三类区域仅适用于自然RPPs（natural RPPs）。