Alabama: In Alabama, the EPA estimates that 61 percent of the streams have no other streams flowing into them, and that 40 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 2.6 million people in Alabama receive some of their drinking water from areas containing these smaller streams.

Arizona: In Arizona, the EPA estimates that 56 percent of the streams have no other streams flowing into them, and that 94 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 800,000 people in Arizona receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Arizona joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Arkansas: In Arkansas, the EPA estimates that 52 percent of the streams have no other streams flowing into them, and that 63 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 900,000 people in Arkansas receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Arkansas joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

California: In California, the EPA estimates that 46 percent of the streams have no other streams flowing into them, and that 66 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 14.3 million people in California receive some of their drinking water from areas containing these smaller streams. Perhaps that's why California joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Colorado: In Colorado, the EPA estimates that 52 percent of the streams have no other streams flowing into them, and that 68 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 3.6 million people in Colorado receive some of their drinking water from areas containing these smaller streams.

Connecticut: In Connecticut, the EPA estimates that 52 percent of the streams have no other streams flowing into them, and that 8 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 2.2 million people in Connecticut receive some of their drinking water from areas containing these smaller streams. And, according to the EPA regional office, the state has more than 22,000 acres of so-called "isolated" waters, ones particularly vulnerable to losing protections. Perhaps that's why Connecticut joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Delaware: In Delaware, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 11 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Perhaps that's why Delaware joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

D.C.: In the District of Columbia, the EPA estimates that 59 percent of the streams have no other streams flowing into them, and that 28 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Perhaps that's why D.C. joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Florida: In Florida, the EPA estimates that 29 percent of the streams have no other streams flowing into them, and that 12 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 900,000 people in Florida receive some of their drinking water from areas containing these smaller streams. Also, the Florida Department of Environmental Protection has reported that more than 800,000 acres of wetlands in the Panhandle region are so-called "isolated" waters, which are particularly vulnerable to losing Clean Water Act safeguards. Perhaps that's why Florida joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Georgia: In Georgia, the EPA estimates that 57 percent of the streams have no other streams flowing into them, and that 33 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 3.8 million people in Georgia receive some of their drinking water from areas containing these smaller streams. Also, the state Department of Natural Resources has indicated that the vast majority of the Carolina Bays it has examined (comprising approximately 66,700 acres) would be considered so-called "isolated" waters, which are particularly vulnerable to losing Clean Water Act safeguards.

Hawaii: In Hawaii, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 46 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 40,000 people in Hawaii receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Hawaii joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Idaho: In Idaho, the EPA estimates that 51 percent of the streams have no other streams flowing into them, and that 47 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 200,000 people in Idaho receive some of their drinking water from areas containing these smaller streams.

Illinois: In Illinois, the EPA estimates that 56 percent of the streams have no other streams flowing into them, and that 55 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 1.6 million people in Illinois receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Illinois joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Indiana: In Indiana, the EPA estimates that 54 percent of the streams have no other streams flowing into them, and that 34 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 1.7 million people in Indiana receive some of their drinking water from areas containing these smaller streams.

Iowa: In Iowa, the EPA estimates that 59 percent of the streams have no other streams flowing into them, and that 62 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 600,000 people in Iowa receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Iowa joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Kansas: In Kansas, the EPA estimates that 57 percent of the streams have no other streams flowing into them, and that 81 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 1.4 million people in Kansas receive some of their drinking water from areas containing these smaller streams.

Kentucky: In Kentucky, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 29 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 3.1 million people in Kentucky receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Kentucky joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Louisiana: In Louisiana, the EPA estimates that 38 percent of the streams have no other streams flowing into them, and that 36 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 1.1 million people in Louisiana receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Louisiana joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Maine: In Maine, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 13 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 390,000 people in Maine receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Maine joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Maryland: In Maryland, the EPA estimates that 59 percent of the streams have no other streams flowing into them, and that 19 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 3.7 million people in Maryland receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Maryland joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Massachusetts: In Massachusetts, the EPA estimates that 52 percent of the streams have no other streams flowing into them, and that 10 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 4.7 million people in Massachusetts receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Massachusetts joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Michigan: In Michigan, the EPA estimates that 48 percent of the streams have no other streams flowing into them, and that 36 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 300,000 people in Michigan receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Michigan joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Minnesota: In Minnesota, the EPA estimates that 45 percent of the streams have no other streams flowing into them, and that 51 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 960,000 people in Minnesota receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Minnesota joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Mississippi: In Mississippi, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 58 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 290,000 people in Mississippi receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Mississippi joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Missouri: In Missouri, the EPA estimates that 58 percent of the streams have no other streams flowing into them, and that 66 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 2.5 million people in Missouri receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Missouri joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Montana: In Montana, the EPA estimates that 54 percent of the streams have no other streams flowing into them, and that 63 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 340,000 people in Montana receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Montana joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Nebraska: In Nebraska, the EPA estimates that 52 percent of the streams have no other streams flowing into them, and that 77 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 525,000 people in Nebraska receive some of their drinking water from areas containing these smaller streams.

Nevada: In Nevada, the EPA estimates that 51 percent of the streams have no other streams flowing into them, and that 89 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections.

New Hampshire: In New Hampshire, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 15 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 470,000 people in New Hampshire receive some of their drinking water from areas containing these smaller streams. Perhaps that's why New Hampshire joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

New Jersey: In New Jersey, the EPA estimates that 48 percent of the streams have no other streams flowing into them, and that 6 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 2.9 million people in New Jersey receive some of their drinking water from areas containing these smaller streams. Perhaps that's why New Jersey joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

New Mexico: In New Mexico, the EPA estimates that 53 percent of the streams have no other streams flowing into them, and that 88 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 200,000 people in New Mexico receive some of their drinking water from areas containing these smaller streams. Perhaps that's why New Mexico joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

New York: In New York, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 11 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 10.2 million people in New York receive some of their drinking water from areas containing these smaller streams. Perhaps that's why New York joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

North Carolina: In North Carolina, the EPA estimates that 56 percent of the streams have no other streams flowing into them, and that 23 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 4.3 million people in North Carolina receive some of their drinking water from areas containing these smaller streams. Perhaps that's why North Carolina joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

North Dakota: In North Dakota, the EPA estimates that 50 percent of the streams have no other streams flowing into them, and that 84 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 290,000 people in North Dakota receive some of their drinking water from areas containing these smaller streams.

Ohio: In Ohio, the EPA estimates that 60 percent of the streams have no other streams flowing into them, and that 45 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 3.5 million people in Ohio receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Ohio joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Oklahoma: In Oklahoma, the EPA estimates that 58 percent of the streams have no other streams flowing into them, and that 74 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. More than 2.4 million people in Oklahoma receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Oklahoma joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Oregon: In Oregon, the EPA estimates that 53 percent of the streams have no other streams flowing into them, and that 51 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 1.6 million people in Oregon receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Oregon joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Pennsylvania: In Pennsylvania, the EPA estimates that 59 percent of the streams have no other streams flowing into them, and that 25 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 8 million people in Pennsylvania receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Pennsylvania's Department of Environmental Protection joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Puerto Rico: In Puerto Rico, almost 4 million people receive some of their drinking water from areas containing smaller streams - those which have no other streams flowing into them or which do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections.

Rhode Island: In Rhode Island, the EPA estimates that 54 percent of the streams have no other streams flowing into them, and that 11 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 550,000 people in Rhode Island receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Rhode Island joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

South Carolina: In South Carolina, the EPA estimates that 53 percent of the streams have no other streams flowing into them, and that 23 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 1.5 million people in South Carolina receive some of their drinking water from areas containing these smaller streams. Perhaps that's why South Carolina joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

South Dakota: In South Dakota, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 86 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 340,000 people in South Dakota receive some of their drinking water from areas containing these smaller streams.

Tennessee: In Tennessee, the EPA estimates that 60 percent of the streams have no other streams flowing into them, and that 18 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 3 million people in Tennessee receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Tennessee joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Texas: In Texas, the EPA estimates that 53 percent of the streams have no other streams flowing into them, and that 75 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Almost 7.3 million people in Texas receive some of their drinking water from areas containing these smaller streams. In addition, Texas estimated that at least 2 million acres of coastal plain wetlands could be considered so-called "isolated" waters - water bodies that are particularly vulnerable to losing Clean Water Act safeguards - as could roughly 250,000 acres of playa lakes in the state.

Utah: In Utah, the EPA estimates that 55 percent of the streams have no other streams flowing into them, and that 79 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 2 million people in Utah receive some of their drinking water from areas containing these smaller streams.

Vermont: In Vermont, the EPA estimates that 56 percent of the streams have no other streams flowing into them, and that 10 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 250,000 people in Vermont receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Vermont joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Virginia: In Virginia, the EPA estimates that 57 percent of the streams have no other streams flowing into them, and that 30 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 3.3 million people in Virginia receive some of their drinking water from areas containing these smaller streams. In addition, the Virginia Institute of Marine Science has estimated that approximately 93,082 acres of wetlands in the state could be considered so-called "isolated" waters - water bodies that are particularly vulnerable to losing Clean Water Act safeguards.

Washington: In Washington, the EPA estimates that 54 percent of the streams have no other streams flowing into them, and that 41 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 1.7 million people in Washington receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Washington joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

West Virginia: In West Virginia, the EPA estimates that 60 percent of the streams have no other streams flowing into them, and that 36 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 880,000 people in West Virginia receive some of their drinking water from areas containing these smaller streams.

Wisconsin: In Wisconsin, the EPA estimates that 53 percent of the streams have no other streams flowing into them, and that 45 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 200,000 people in Wisconsin receive some of their drinking water from areas containing these smaller streams. Perhaps that's why Wisconsin joined more than 30 states in asking the Supreme Court to uphold broad legal protections for small tributaries and their adjacent wetlands.

Wyoming: In Wyoming, the EPA estimates that 53 percent of the streams have no other streams flowing into them, and that 66 percent do not flow year-round. Under varying interpretations of the most recent Supreme Court decision, these smaller water bodies are among those at risk of losing Clean Water Act protections. Approximately 180,000 people in Wyoming receive some of their drinking water from areas containing these smaller streams.