In summary, Greenville water quality improved such that all complaints about water quality had ended after installing the aeration system.  It was also noted that there were no longer any odours.

Source: Reservoir Aeration Improves Water Quality.   Donald Rapoza.  Water Resources Engineer, New Hampshire Water Resources Board.  Concord, New Hampshire.

CASE #3

Greenville's water quality prior to an installed ADS aeration system was "dark from colour imparted by decaying organic matter.  High iron content turned household laundry brown and bleaching attempts resulted in reactions with manganese, turning clothes black.  In addition, there was a strong odour of hydrogen sulfide."  These conditions existed despite the water being treated in a plant employing "flocculation, settling, rapid sand filtration, and chlorination."

The following illustration is derived from water-quality test results obtained prior to aeration system installation, after 4 months of operation, and again after 8 months of operation.

It is evident that Oxygen levels increased dramatically, especially at the lower depths.  At 23 ft. initially there was no dissolved oxygen, but after 4 months operation, there was as much dissolved oxygen in the bottom waters as in the surface.

An 80% decrease in colour was noted after 4 months of operation.

Iron content reduced by 89%.  Manganese reduced by 91%.  Turbidity was eliminated. pH remained fairly stable.  Nitrates reduced by 76%.  Chlorides reduced by 41%.

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Case 1 - Installation of a PC 120 Aeration System - demonstrates performance of the system

Case 2 - Installation of a PC 330 Aeration System - installed in a golf course water hazard.