305b Assessed 2024 River Lake Estuary Set

305b Assessed River, Lake, Estuary 2024: Connecticut 305b Assessed River 2024 is a 1:24,000-scale, line feature-based layer that includes rivers that have been assessed to comply with Sections 305(b) and 303(d) of the federal Clean Water Act. Section 305(b) of the Clean Water Act requires each state to monitor, assess and report on the quality of its waters relative to attainment of designated uses established by the State's water quality standards. Section 303(d) requires each State to compile a subset of that list identifying only those waters not meeting water quality standards and assign a Total Maximum Daily Load (TMDL) priority ranking to each impaired waterbody. This layer is based on information collected and compiled prior to 2024. It represents conditions at a particular point in time and does not represent current conditions. This layer includes only rivers that were assessed in the time period above referenced. It can be used with the 2024 Connecticut 305b Assessed Lake layer and the Connecticut 305b Assessed Estuary layer to geographically display attainment and non-attainment for each designated use on assessed waters within Connecticut's boundaries. Features are lines that represent the locations of assessed rivers. The sources for these features include the hydrography layer and the water quality classification layer. Attribute information is comprised of a unique identifier (segment ID) for each feature, the name of the waterbody, its location, the assessment cycle (year), the water type, the water quality class goal, the length of the feature in miles, the National Hydrography Dataset basin number, and the assessment for the following categories: aquatic life, recreation, fish consumption, and drinking water supply. Data is compiled at 1:24,000 scale. Connecticut 305b Assessed Lake 2024 is a 1:24,000-scale, polygon feature-based layer that includes lakes that have been assessed in compliance with Sections 305(b) and 303(d) of the federal Clean Water Act. Section 305(b) of the Clean Water Act requires each state to monitor, assess and report on the quality of its waters relative to attainment of designated uses established by the State's water quality standards. Section 303(d) requires each State to compile a subset of that list identifying only those waters not meeting water quality standards and assign a Total Maximum Daily Load (TMDL) priority ranking to each impaired waterbody. This layer is based on information collected and compiled prior to 2024. It represents conditions at a particular point in time and does not represent current conditions. This layer includes only assessed lakes. It can be used with the 2024 Connecticut 305b Assessed River layer and the Connecticut 305b Assessed Estuary layer to geographically display attainment and non-attainment for each designated use on assessed waters within Connecticut's boundaries. Features are polygon locations that represent the locations of assessed lakes. The sources for these features include the hydrography layer and the water quality classification layer. Attribute information is comprised of the Connecticut lake identification number, a unique identifier for each feature, the name of the waterbody, its location, the assessment cycle (year), the water type, the water quality class goal, the length of the feature in miles, the National Hydrography Dataset basin number, and the assessment for the following categories: aquatic life, recreation, fish consumption, and drinking water supply. Data is compiled at 1:24,000 scale. Connecticut 305b Assessed Estuary 2024 is a 1:24,000-scale, polygon feature-based layer that includes estuaries that have been assessed in compliance with Sections 305(b) and 303(d) of the federal Clean Water Act. Section 305(b) of the Clean Water Act requires each state to monitor, assess and report on the quality of its waters relative to attainment of designated uses established by the State's water quality standards. Section 303(d) requires each State to compile a subset of that list identifying only those waters not meeting water quality standards and assign a Total Maximum Daily Load (TMDL) priority ranking to each impaired waterbody. This layer is based on information collected and compiled prior to 2024. It represents conditions at a particular point in time and does not represent current conditions. This layer includes only assessed estuaries. It can be used with the 2024 Connecticut 305b Assessed Lakes layer and the 2024 Connecticut 305b Assessed Rivers layer to geographically display attainment and non-attainment for each designated use on assessed waters within Connecticut's boundaries. Features are polygon locations that represent the locations of assessed estuaries. The sources for these features include the hydrography layer and the water quality classification layer. Attribute information is comprised of a unique identifier (segment Id) for each feature, a description of the waterbody, its location, the assessment cycle (year), the water type, the Long Island Sound basin and zone, whether the feature is an island or a beach, the water quality class, the size in square miles, and the assessment for the following categories: marine aquatic life, recreation, fish consumption, and shellfish. Data is compiled at 1:24,000 scale. This dataset is not updated.305b 评估河流、湖泊与河口数据集（2024年：康涅狄格州） 康涅狄格州2024年305b评估河流图层（Connecticut 305b Assessed River 2024）为1:24000比例尺的线状要素图层，包含经评估符合联邦《清洁水法》第305(b)条与第303(d)条要求的河流。《清洁水法》第305(b)条要求各州对辖区内水体质量开展监测、评估并报告，以判定其是否达到州水质标准设定的指定用途要求；第303(d)条要求各州编制清单子集，仅列出未达到水质标准的水体，并为每个受损水体分配总最大日负荷总量（Total Maximum Daily Load, TMDL）优先级排名。 本图层基于2024年之前收集整理的信息编制，仅反映特定时间点的水体状况，不代表当前实际情况，且仅包含上述评估周期内完成评估的河流。该图层可与2024年康涅狄格州305b评估湖泊图层及康涅狄格州305b评估河口图层配合使用，以地理可视化方式展示康涅狄格州辖区内评估水体各指定用途的达标与未达标情况。图层要素为代表评估河流位置的线状几何对象，数据源包括水文图层与水质分类图层。属性信息包含每个要素的唯一标识符（河段ID）、水体名称、所在位置、评估周期（年份）、水体类型、水质等级目标、要素长度（英里）、国家水文数据集（National Hydrography Dataset）流域编号，以及水生生物、娱乐、鱼类消费与饮用水供应四类指标的评估结果。数据比例尺为1:24000。 康涅狄格州2024年305b评估湖泊图层（Connecticut 305b Assessed Lake 2024）为1:24000比例尺的面状要素图层，包含经评估符合联邦《清洁水法》第305(b)条与第303(d)条要求的湖泊。《清洁水法》第305(b)条要求各州对辖区内水体质量开展监测、评估并报告，以判定其是否达到州水质标准设定的指定用途要求；第303(d)条要求各州编制清单子集，仅列出未达到水质标准的水体，并为每个受损水体分配总最大日负荷总量（TMDL）优先级排名。 本图层基于2024年之前收集整理的信息编制，仅反映特定时间点的水体状况，不代表当前实际情况，且仅包含完成评估的湖泊。该图层可与2024年康涅狄格州305b评估河流图层及康涅狄格州305b评估河口图层配合使用，以地理可视化方式展示康涅狄格州辖区内评估水体各指定用途的达标与未达标情况。图层要素为代表评估湖泊位置的面状几何对象，数据源包括水文图层与水质分类图层。属性信息包含康涅狄格州湖泊识别编号、每个要素的唯一标识符、水体名称、所在位置、评估周期（年份）、水体类型、水质等级目标、要素长度（英里）、国家水文数据集流域编号，以及水生生物、娱乐、鱼类消费与饮用水供应四类指标的评估结果。数据比例尺为1:24000。 康涅狄格州2024年305b评估河口图层（Connecticut 305b Assessed Estuary 2024）为1:24000比例尺的面状要素图层，包含经评估符合联邦《清洁水法》第305(b)条与第303(d)条要求的河口。《清洁水法》第305(b)条要求各州对辖区内水体质量开展监测、评估并报告，以判定其是否达到州水质标准设定的指定用途要求；第303(d)条要求各州编制清单子集，仅列出未达到水质标准的水体，并为每个受损水体分配总最大日负荷总量（TMDL）优先级排名。 本图层基于2024年之前收集整理的信息编制，仅反映特定时间点的水体状况，不代表当前实际情况，且仅包含完成评估的河口。该图层可与2024年康涅狄格州305b评估湖泊图层及2024年康涅狄格州305b评估河流图层配合使用，以地理可视化方式展示康涅狄格州辖区内评估水体各指定用途的达标与未达标情况。图层要素为代表评估河口位置的面状几何对象，数据源包括水文图层与水质分类图层。属性信息包含每个要素的唯一标识符（河段ID）、水体描述、所在位置、评估周期（年份）、水体类型、长岛湾流域与分区、要素是否为岛屿或滩涂、水质等级、面积（平方英里），以及海洋水生生物、娱乐、鱼类消费与贝类养殖四类指标的评估结果。数据比例尺为1:24000。 本数据集无更新。