Site Specific Alternative Criteria (SSAC) (Areas)

All of Florida's surface waters are classified according to designated uses (Classes I-V). Water quality criteria that support the classes (and therefore, uses) apply uniformly to all waters within the state that have the same classification. Florida recognizes that with the variety of waters found here and a broad approach to them, there may be situations where a generally applicable statewide criterion may not be appropriate for a waterbody or portion of a waterbody. A Site Specific Alternative Criterion, or SSAC, is a water quality criterion developed for a particular waterbody or segment of a waterbody that is designed to more accurately reflect site specific conditions. Criteria, including site specific criteria, are one of the components of Florida?s surface water quality standards, and are intended to protect designated and existing uses of the state waters. Development of an approvable site specific criterion is dependent on a demonstration that the different water quality criterion is more appropriate for the waterbody than the one normally used for the classification. A SSAC recognizes and accounts for the specific needs of the biological community native to the waterbody to make sure they are fully protected. When approved, a SSAC is used instead of (or sometimes in conjunction with) the surface water criterion that applies to the waters for that classification.This data layer should be used on conjunction with the surface water classification data layers (poly and line).佛罗里达州所有地表水均依据指定使用功能划分为I至V类。支撑各类别（及对应使用功能）的水质基准，统一适用于本州内所有归属同类别的水体。佛罗里达州认识到，由于境内水体类型多样且采用通用管理思路，可能存在通用的全州性基准不适用于某一水体或其部分区域的情况。特定场所替代基准（Site Specific Alternative Criterion，简称SSAC）是针对特定水体或其区段制定的水质基准，旨在更精准地反映该场所的具体环境条件。水质基准（包括特定场所基准）是佛罗里达州地表水水质标准的组成部分之一，其目的在于保护本州水体的指定使用功能与既有使用功能。获批的特定场所基准需证明，相较于该类别水体通用的基准，其更适配对应水体的实际情况。SSAC兼顾并考量了该水体原生生物群落的特定需求，以确保其得到充分保护。经批准后，SSAC可替代（或有时协同使用）适用于该类别水体的通用地表水基准。本数据图层需与地表水分类数据图层（poly与line）配合使用。