Water entering a bottling facility directly from a source is sometimes referred to as point of entry (POE) and will require clarification filtration to remove any insoluble contaminants such as sand, silt or debris before entering intermediate storage. 

Typically the filtration employed for this requirement will be designed to handle a high and variable particle loading. 

Carefully selected retention and construction of the filter at this stage in the process will greatly influence the performance of further downstream filtration and overall process efficiency.