EPA Established Total Maximum Daily Loads (TMDLs)

A TMDL (Total Maximum Daily Load) is a scientific determination of the maximum amount of a given pollutant that a surface water can absorb and still meet the water quality standards that protect human health and aquatic life. Waterbodies that do not meet water quality standards are identified as "impaired" for the particular pollutants of concern, for example: nutrients (total nitrogen/total phosphorus), chlorophyll a, fecal indicator bacteria, metals, etc. TMDLs must be developed, publicly noticed, adopted and implemented for the identified pollutants to reduce the pollutants and restore the waterbody so that designated uses are attained. This dataset contains only those TMDLs which have been established by the EPA and primarily address waterbody/pollutants that were identified on the 1998 303(d) list and served the purpose of meeting the 1998 consent decree requirements, which ended in 2012. EPA has not developed additional TMDLs in Florida since the end of the consent decree. This layer was created using data from the EPA website “Assessment, total maximum daily load (TMDL) Tracking and Implementation System (ATTAINS): https://www.epa.gov/waterdata/attains, but is also available through the EPA website “How’s My Waterway”: https://mywaterway.epa.gov/.TMDL（总最大日负荷量，Total Maximum Daily Load）是一项科学判定结果，指在满足保护人类健康与水生生物的水质标准前提下，地表水体能够吸纳的特定污染物的最大负荷量。未达到水质标准的水体，会被认定为针对所关注的特定污染物存在“受损”情况，例如营养物（总氮/总磷）、叶绿素a、粪便指示菌、金属等。针对已识别的污染物，需制定、公开公示、采纳并实施TMDL，以削减污染物、修复水体，从而实现水体的既定使用功能。本数据集仅包含由美国环境保护署（EPA）制定的TMDL，且主要针对1998年303(d)清单中识别的水体与污染物，用于满足2012年到期的1998年同意令的相关要求。该同意令于2012年终止后，美国环境保护署（EPA）未再在佛罗里达州制定新的TMDL。本图层采用美国环境保护署（EPA）官网的“评估、总最大日负荷量（TMDL）跟踪与实施系统（ATTAINS）”的数据制作而成，该系统网址为：https://www.epa.gov/waterdata/attains；相关数据也可通过EPA官网的“我的水道状况”（How’s My Waterway）平台获取，网址为：https://mywaterway.epa.gov/。