The cleanest, best tasting water may contain undetected contaminants. Water contaminated with harmful bacteria, nitrates or nitrites can cause diarrhea, cramps, nausea, headache, serious illness, even death.

Water experts recommend testing home water at least:

• Once a year for municipal water users
• Twice a year for well water users
• Four times a year for those with low immunities (such as HIV patients), or for anyone on chemotherapy
• Whenever you suspect a problem or a problem is reported in your area