Signs are posted at Lake Wilson in Wahiawa warning people to stay out of the water because of the possible discharge of partially disinfected sewage.

The signs are a precautionary measure, the state Health Department said..

The city notified the Health Department’s Clean Water Branch of a 4-second power flicker at 4:12 pm that may have caused UV disinfection levels to be less than normal on about 14,000 gallons of secondary treated effluent from the Wahiawa Waste Water Treatment plant. 

The public is advised to stay out of the waters until the signs are removed.