LOS ANGELES (AP) — Tap water in Sierra Madre is yellow, and it's making some residents see red.

Officials in the tiny city tell the Los Angeles Times the temporary use of imported supplies from the Metropolitan Water District is to blame for the off-putting color.

And they say the water is perfectly safe to drink.

The Sierra Madre Public Works Department was forced to switch to the imported water after the state determined that the city's underground aquifer was running low.

The mixture of chlorine and ammonia that the MWD uses to disinfect the water interact with the rust in steel pipes to produce the yellowish color.

Resident Grant Nelson says it's embarrassing. He has to tell guests that he keeps a clean house and the yellow water is the city's fault.