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Water appears colorless in small amounts, but it turns bluer as the sample size increases due to its interaction with light and other basic properties.

After a hot, dry summer, tap water may smell earthy/musty in the fall. All surface waterways have algae, but summertime algae are numerous. Algae die off and emit two harmless chemicals that smell earthy or musty as water temperatures drop. We can smell tiny amounts of these chemicals.

Prince William Water consistently tests and monitors the water to make sure that it meets or exceeds EPA’s safe drinking water standards. Tap water that meets EPA standards is typically safe. We take pride in maintaining high water quality throughout our distribution system.  

The pink/orange toilet stains are likely Serratia marcescens bacteria. These bacteria are most common in toilet bowls, shower stalls, dishwashers, tiles, sinks and pet water dishes.

Any damp place with phosphorus or fat will develop the bacterium. Serratia can grow in toilets where water stands long enough to evaporate chlorine residual disinfection. Chlorinated water kills Serratia and bleach removes microorganisms from toilets. 

Prince William Water's state-certified Water Quality Laboratory performs or administers state and federal testing to ensure that our water meets or exceeds regulatory standards. In addition to regulated testing, several other analyses check distribution system water quality. 

If chlorine is not removed before using in your aquarium, Prince William Water tap water can harm fish. Prince William Water flushes with free chlorine from April to June and utilizes chloramines, a chlorine-ammonia mixture, the rest of the year. Ask your pet retailer about chlorine and chloramine removal.

Mineral residue on items is from water's natural mineral content, such as calcium.

White particles in ice cubes are harmless minerals.

Hot water from a heater may include substances that should not be consumed. These impurities may include domestic plumbing metals concentrated after heating. Hot water has more contaminants because it absorbs household plumbing materials faster than cold water. 

Tap water can safely be stored for up to six months if stored properly, and the United States Department of Agriculture recommends replacing stored water every six months. Water should be stored away from sunlight, in cool temperatures and away from toxic substances. Visit our 'Prepare for Water Emergencies' page for more information about storing water.