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Residents of the Cache County hamlet of Nibley still cannot drink or cook with their culinary water, but they can use it for other purposes.

Test results came back Friday evening that showed the water is clean of a diesel fuel contamination, according to city officials. But the city is advising people not to drink the water or use it for cooking, said City Manager David Zook.

"The city plans to continue cleaning the water storage tanks and will re-evaluate system safety over the weekend to determine when the Do-Not-Drink order might be lifted," the city announced on its website.

On Wednesday, the town ordered its 5,500 residents to cease using culinary water after diesel fuel was found to have contaminated the system. City officials suspect a leaking tank on a farm truck was the source of the leak near Yeates Springs.

The springs, along with two wells, comprise the system's fresh water sources. Only the springs were tainted, officials said.

The Herald-Journal, quoting Zook, reported that about 25 gallons of diesel was spilled by the truck last weekend. The leak, which occurred on private property, was not immediately reported.

Once the contamination was confirmed Wednesday, the springs were isolated while the entire system was flushed. Periodic testing of water samples was ongoing. Nibley water users were told again on Friday not to use the system for drinking, cooking, washing, bathing or watering animals until test results are clear.

Based on the test results, the city is implementing a flushing plan in which residents are being asked to systematically flush the water pipes in their homes. Residents are asked to flush according to a schedule issued by the city, with different parts of the city flushing at different times. Instructions on how to flush household pipes are available on the city website.

Even when the system is cleared, officials warned, the water could still have an odd odor and taste for some time.

In the meantime, the Nibley City Facebook page noted that watering stations have been set up in neighboring communities:

— Logan, 1750 S. 400 West (behind Pallets of Utah) and 2002 S Hwy 89/91 (Comfort Inn)

— Providence, Zollinger Park, 200 W. 50 North

— Hyrum City Senior Center, 675 E. Main Street

— Millville City Hall, 510 E. 300 South

Additionally, a self-serve water station was set up at Nibley Park, 294 W. 3200 South, and cases of water were being provided at the Nibley City parking lot.

— Reporter Michael McFall contribtued to this story.

Twitter: @remims