The median nitrate level was 4.2 mg/l (range < 1-29.0), with similar levels in rural and urban municipalities (p = 0.86). Trace elements were unquantifiable in 94% of tap water samples. Differences between areas were significant for nitrate (p < 0.001) and arsenic (p = 0.03). Only nitrate was quantifiable in bottled water (range 2.3-15.6 mg/l).