The taste and odor is a palatability issue. There are no health hazards crated regardless of the taste and odor.
Algal blooms are common to surface water supplies in warm weather climate states like Texas.
This occurs due to lack of rain. This is provided through many hot summer days. When all conditions are met, photosynthesis will take place and the algae will grow or proliferate. Aquatic fungi, actinomycetes, grow on dead and decaying algae and cause an earthy taste in the water. Laboratory personnel, through daily analysis, perform algal counts and can determine the onset of an algal bloom.