This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

TMDL Lakes

Metadata Updated: August 15, 2019

The Clean Water Act Section 303(d) establishes the Total Maximum Daily Load (TMDL) program. The purpose of the TMDL program is to identify sources of pollution and allocate pollutant loads in places where water quality goals are not being achieved. This layer shows the list of waters for which technology-based or other required pollution controls are not stringent enough to meet water quality standards. The TMDLs themselves specify a pollutant budget that must be achieved to meet state water quality standards and allocates pollutant loads among pollution sources in a watershed, e.g., point and nonpoint sources. This layer represents lakes with TMDL associated with them. Lakes have characteristics that differentiate TMDLs from other waters. Lakes are not free-flowing like streams, but are contained waters that trap pollutants for long periods. Most lake impairments are from high nutrient or sediment loads. Wherever possible, lake TMDLs are developed with the information in the lake study reports that were sponsored by local watershed groups or other local interests. Target acceptable pollutant loads are set at the level of a watershed largely unaffected by human induced impacts. Load allocations are given to the pollutant sources using the same methods as nonpoint source TMDLs. Other indicators of water quality are also considered in the evaluation of a lake. One indicator is the Trophic Status Index (TSI), which refers to the degree of nutrient enrichment in the lake. Nutrient enrichment causes growths of algae that consume oxygen and interfere with the health of the aquatic organisms in the lake. The TSI is affected by factors such as lake volume, water residence time and nutrient loads to the lake. After target loads are set, the TSI is evaluated under reduced nutrient load conditions to assure that the pollutant reductions will bring the TSI into an acceptable range. Implementation of lake TMDLs is best accomplished though local participation. This layer is based on the High Resolution National Hydrography Dataset (NHD).

Access & Use Information

Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

Downloads & Resources

Dates

Metadata Date January 5, 2011
Metadata Created Date August 15, 2019
Metadata Updated Date August 15, 2019
Reference Date(s) NaN-07-01 (publication)
Frequency Of Update continual

Metadata Source

Harvested from Pennsylvania Geospatial Data Clearinghouse

Additional Metadata

Resource Type Dataset
Metadata Date January 5, 2011
Metadata Created Date August 15, 2019
Metadata Updated Date August 15, 2019
Reference Date(s) NaN-07-01 (publication)
Responsible Party PA Department of Environmental Protection (Point of Contact)
Contact Email
Access Constraints Use Constraints: Commonwealth of Pennsylvania Department of Environmental Protection Disclaimer for Data The user shall save the Commonwealth harmless from any suits, claims, or actions arising out of the use of the data files or accompanying documentation, or arising out of any defects in the datafiles or accompanying documentation. The Commonwealth excludes any and all implied warranties and makes no warranty or representation with respect to the data files or accompanying documentation, including quality, performance, merchantability, or fits for a particular purpose. These data files and documentation are provided "as is" and the user assumes the entire risk as to their quality and performance., Access Constraints: None
Bbox East Long -74.744705
Bbox North Lat 41.663657
Bbox South Lat 40.003513
Bbox West Long -80.531309
Coupled Resource
Frequency Of Update continual
Guid
Harvest Object Id 4db55c2e-7160-40c7-bd17-d7861a3e7419
Harvest Source Id 461fc638-8de6-4c37-9f60-43399e6f6031
Harvest Source Title Pennsylvania Geospatial Data Clearinghouse
Licence The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

Didn't find what you're looking for? Suggest a dataset here.