The characteristics of ammonia in drinking water sources in China were evaluated during 2005–2009. The spatial distribution and
seasonal changes of ammonia in different types of drinking water sources of 22 provinces, 5 autonomous regions and 4 municipalities
were investigated. The levels of ammonia in drinking water sources follow the order of river > lake/reservoir > groundwater. The
levels of ammonia concentration in river sources gradually decreased from 2005 to 2008, while no obvious change was observed in the
lakes/reservoirs and groundwater drinking water sources. The proportion of the type of drinking water sources is different in different
regions. In river drinking water sources, the ammonia level was varied in different regions and changed seasonally. The highest value and
wide range of annual ammonia was found in South East region, while the lowest value was found in Southwest region. In lake/reservoir
drinking water sources, the ammonia levels were not varied obviously in different regions. In underground drinking water sources, the
ammonia levels were varied obviously in different regions due to the geological permeability and the natural features of regions. In
the drinking water sources with higher ammonia levels, there are enterprises and wastewater drainages in the protected areas of the
drinking water sources.
The characteristics of ammonia in drinking water sources in China were evaluated during 2005–2009. The spatial distribution andseasonal changes of ammonia in different types of drinking water sources of 22 provinces, 5 autonomous regions and 4 municipalitieswere investigated. The levels of ammonia in drinking water sources follow the order of river > lake/reservoir > groundwater. Thelevels of ammonia concentration in river sources gradually decreased from 2005 to 2008, while no obvious change was observed in thelakes/reservoirs and groundwater drinking water sources. The proportion of the type of drinking water sources is different in differentregions. In river drinking water sources, the ammonia level was varied in different regions and changed seasonally. The highest value andwide range of annual ammonia was found in South East region, while the lowest value was found in Southwest region. In lake/reservoirdrinking water sources, the ammonia levels were not varied obviously in different regions. In underground drinking water sources, theammonia levels were varied obviously in different regions due to the geological permeability and the natural features of regions. Inthe drinking water sources with higher ammonia levels, there are enterprises and wastewater drainages in the protected areas of thedrinking water sources.
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