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State, Tribal & Territorial Standards
Listed below are links to all available state, tribe and territory websites related to water quality standards. The linked websites direct you to the organizations that are most closely tied to setting or regulating water quality standards for a given entity. Links are grouped by EPA region. For more information, please contact your Regional Coordinator.
All links exit EPA: 
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Region 1
- Connecticut: Connecticut Department of Environmental Protection—Water Quality
- Maine: Maine Department of Environmental Protection—Bureau of Land and Water Quality
- Massachusetts: Massachusetts Department of Environmental Protection—Water, Wastewater, and Wetlands
- New Hampshire: New Hampshire Department of Environmental Services—Water Division
- Rhode Island: Rhode Island Department of Environmental Management—Office of Water Resources
- Vermont: Vermont Department of Environmental Conservation—Water Quality Division
Region 2
- New Jersey: New Jersey Department of Environmental Protection—Water Monitoring and Standards Program
- New York: New York Department of Environmental Conservation—Lands and Waters
- U.S. Virgin Islands: U.S. Virgin Islands Division of Environmental Protection—Water Quality Management Program
Region 3
- Delaware: Delaware Department of Natural Resources—Water Quality Standards Program
- District of Columbia: District of Columbia Department of Health—Water Quality Division
- Maryland: Maryland Department of the Environment—Water Quality Standards Program
- Pennsylvania: Pennsylvania Department of Environmental Protection—Water Quality Standards Program
- Virginia: Virginia Department of Environmental Quality—Water Quality Programs
- West Virginia: West Virginia Department of Environmental Protection—Division of Water and Waste Management
Region 4
- Alabama: Alabama Department of Environmental Management—Water Division
- Florida: Florida Department of Environmental Protection—Water Resource Management
- Georgia: Georgia Environmental Protection Division—Watershed Protection Branch
- Kentucky: Kentucky Department of Environmental Protection—Division of Water
- Mississippi: Mississippi Department of Environmental Quality—Water Program
- North Carolina: North Carolina Department of Environment and Natural Resources—Division of Water Quality
- South Carolina: South Carolina Department of Health and Environmental Control—Bureau of Water
- Tennessee: Tennessee Department of Environment and Conservation—Water Programs
- Seminole of Florida: Government of Seminole Tribe of Florida—Water Resources Management Department
Region 5
- Illinois: Illinois Environmental Protection Agency—Bureau of Water
- Indiana: Indiana Department of Environmental Management—Office of Water Quality
- Michigan: Michigan Department of Environmental Quality—Water Bureau
- Minnesota: Minnesota Pollution Control Agency—Water
- Ohio: Ohio Environmental Protection Agency—Division of Surface Water
- Wisconsin: Wisconsin Department of Natural Resources—Water Evaluation Section
Region 6
- Arkansas: State of Arkansas Department of Environmental Quality—Water Division
- Louisiana: Louisiana Department of Environmental Quality—Water Quality Assessment
- New Mexico: New Mexico Environment Department—Surface Water Quality Bureau
- Oklahoma: Oklahoma Water Resources Board—Water Quality Standards
- Texas: Texas Commission on Environmental Quality—Texas Surface Water Quality Standards
Region 7
- Iowa: Iowa Department of Natural Resources—Water Quality Standards
- Kansas: Kansas Department of Health and Environment—Bureau of Water
- Missouri: Missouri Department of Natural Resources—Division of Environmental Quality, Water Protection Program
- Nebraska: Nebraska Department of Environmental Quality—Water Quality Division
Region 8
- Colorado: Colorado Department of Public Health and Environment—Water Quality Control Division
- Montana: Montana Department of Environmental Quality—Water Quality Standards and Classifications
- North Dakota: North Dakota Department of Health—Division of Water Quality
- South Dakota: South Dakota Department of Environment and Natural Resources
- Utah: Utah Department of Environmental Quality—Division of Water
- Wyoming: Wyoming Department of Environmental Quality—Water Quality Division
Region 9
- Arizona: Arizona Department of Environmental Quality—Water Quality Division
- California: California State Water Resources Control Board
- California Region 1 (North Coast): North Coast Regional Water Quality Control Board
- California Region 2 (San Francisco Bay): San Francisco Bay Regional Water Quality Control Board
- California Region 3 (Central Coast): Central Coast Regional Water Quality Control Board
- California Region 4 (Los Angeles): Los Angeles Regional Water Quality Control Board
- California Region 5 (Central Valley): Central Valley Regional Water Quality Control Board
- California Region 6 (Lahontan): Lahontan Regional Water Quality Control Board
- California Region 7 (Colorado River Basin): Colorado River Basin Regional Water Quality Control Board
- California Region 8 (Santa Ana): Santa Ana Regional Water Quality Control Board
- California Region 9 (San Diego): San Diego Regional Water Quality Control Board
- Hawaii: Hawaii State Department of Health—Environmental Health/Water Quality
- Nevada: Nevada Division of Environmental Protection—Bureau of Water Quality Planning
- Hoopa Valley Tribe: Tribal Environmental Protection Agency—Natural Resources
- Navajo Nation: Navajo Environmental Protection Agency—Water Quality Program
- Commonwealth of the Northern Mariana Islands: Commonwealth of the Northern Mariana Islands—Division of Environmental Quality
- Guam: Guam Environmental Protection Agency—Water Programs Division