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MappingThe map below indicates the states with designated use information available for mapping through EnviroMapper for Water. Updates are planned to occur on a six-month basis. Some states have maps that portray information in more detail than what's shown. More detailed maps will be used on EnviroMapper site as they become available. If you are not familiar with EnviroMapper, click here for a User Guide to view maps of WQS data using EnviroMapper for Water. Note: Pink states have preliminary designated use information available on the Intranet and may also have preliminary mapping information available on the Intranet.
 The U.S. EPA Office of Water, Office of Science and Technology maintains the files on this website to enhance public access to information. While we try to keep the information timely and accurate, we make no expressed or implied guarantees. We will attempt to correct any errors brought to our attention. The information contained on these pages is intended to inform the public and does not establish or affect legal rights or obligations. This applies to all pages in the WQSDB website. Agency decisions in any particular case will be made by applying the law and regulations to the specific facts of the case. In addition, because EPA cannot guarantee protection from potential alteration or tampering of the materials on this server by outside parties, these materials do not constitute "official" versions, and they are not intended, nor can they be relied upon, to create any rights enforceable by any party in litigation with the U.S. Please click here to see if an additional state-specific disclaimer applies to any information in this Water Quality Standards Database.
EnviroMapper for WaterThis interactive Geographic Information System (GIS) application uses the
National Hydrography Dataset (NHD)
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