Fresh.
No, it is called ground water.
All rivers are by definition fresh water unless they are very polluted. There is, however, a portion of every river that reaches an ocean that is called an estuary. this is where the fresh water coming downstream mingles with the salty tidal water of the ocean.
The answer is Swimming.
quinine water
The combination of salt water and fresh water is called brackish water.
Fresh water that mixes with ocean water is called brackish water. Brackish water has a salinity level that falls between that of freshwater and seawater.
Underground water is called underground water, because it is "underground" not because it is fresh or salt. You can have underground salt water reservoirs just like you can have fresh water ones.
Is called (rather unsurprisingly) a fresh water ecologist.
brakish water
cause it has no salt water
A mix of fresh and salt water is called brackish water. It usually occurs in estuaries where rivers meet the sea.
Fresh.
No they cannot, its why they're so called.
No. Water is called fresh simply when it does not have too much salt in it. Fresh water could still be contaminated with toxins or harmful organisms.
water water
that would be called an estuary