Are pink stains appearing near water sources?

Pink stains appearing on bathroom fixtures, drainboard surfaces, and pet dishes are usually from a bacteria, Serratia marcescens. This pink residue is less likely a problem associated with water quality than with naturally occurring, airborne bacteria. The bacteria produce a pinkish film (sometimes dark gray) and often appear during and after new construction or remodeling activities.

The dirt and dust stirred up by the work probably contain Serratia bacteria. Once airborne, the bacteria seek moist environments to proliferate. These airborne bacteria can come from any number of naturally occurring sources, and the condition can be aggravated if customers remove the chlorine from their water by way of an activated carbon filter.

The best solution to keep these surfaces free from bacterial film is continual cleaning. A cleanser containing chlorine is best, but use care with abrasives to avoid scratching fixtures, which will make them even more susceptible to bacteria. Keep bathtubs and sinks wiped down and dry. Add 3 to 5 tablespoons of chlorine bleach to toilet tanks as needed.

Show All Answers

1. Is dirty, yellow or brown water coming from the faucet?
2. Are there floating, white, granular particles in your water?
3. Are there black particles in your water?
4. Is your water blue?
5. Does your water appear white or "milky"?
6. Are pink stains appearing near water sources?
7. Does your water have a soapy appearance?