ALBUQUERQUE, N.M. -- 5 months ago, Target 7 found something floating in samples of Albuquerque's future drinking water.

Target 7 tests showed the material was a black yeast, something experts said could make some people sick.

Since then, the bottling of the filtered river water has stopped. Albuquerque Mayor Martin Chavez demanded an investigation to see if the city's future water supply would be safe, and extensive testing has been done to find out where the contamination came from and if it poses a health risk.

Now the city of Albuquerque is giving Target 7 the final results.

The city's environmental health manager John Soladay was put in charge of the investigation.

"We are positive we know what was in the water and are very confident it doesn't pose a health hazard," said Soladay.

The final report says the contaminant is a fungus. Several strains were found -- most of them harmless -- but one is listed as a suspected allergen (Dothidea sp.), another as a well-known allergen (Cladosporium sp.), also known as "a mold known to contaminate food, beverage and water."

The city found that another fungus (Phoma sp.) in the bottles is only dangerous to people with severely suppressed immune systems and dialysis patients, with "no reported human pathogenesis from ingestion."

While the report answers most questions, it didn't answer them all.

Soladay said his team found five different potential mechanisms for how the bottles got contaminated. Four of them include steps in the trucking and/or bottling of the water. The fifth suggests the possibility of tampering.

But the city investigation also discovered there was no way for anything to survive filtration.

The mayor issued a statement to Target 7 stating that "the city of Albuquerque was pleased with the results of the recent water tests. It appears the plant has taken appropriate action to stop the problem."

The filtering plant in charge of taking water from the Rio Grande and turning it into drinkable water is set to come online sometime after the first of the year.

Both the Bernalillo County Water Utility Authority and the city of Albuquerque are certain the filter works and will eliminate any contamination.

The city found that the fungus in the bottles is only dangerous to people with severely suppressed immune systems.

The Bernalillo County Water Utility Authority said workers have completed the final segment of underground pipeline for Albuquerque's future source of drinking water.

The San Juan-Chama Water Project consists of more than 38 miles of pipe.

The water switch will take place later this year or early 2009.

Once the system comes online, it will provide water to up to 70 percent of Albuquerque homes.

Water Report Excerpts- Introduction And Toxicology Chart