Timeframe. The United States Postal Services reports that as of January 2011, it takes an average of one to three days for First-Class Mail to arrive at its destination. Priority Mail takes an average of one to two days to arrive, according to the USPS.USPS only includes the time a package stays in transit in their estimations.Packages dropped off at a post office during business hours usually leave that day. Packages dropped off after hours may take an additional day.he United States Postal Services reports that as of January 2011, it takes an average of one to three days for First-Class Mail to arrive at its destination.
Short-term: Excessive levels of nitrate in drinking water have caused serious illness and sometimes death. The serious illness in infants (aka Blue Baby Syndrome) is due to the conversion of nitrate to nitrite by the body, which can interfere with the oxygen-carrying capacity of the childs blood.
There are two health concerns when drinking water with high levels of nitrates or nitrites. The first health concern is with infants being at risk for â blue baby syndrome â, also called methemoglobinemia 1  : Poisoning can occur when infants drink formula made with nitrate or nitrite-contaminated tap water.he most common form of nitrogen found in well water is nitrate. Wells with high levels of nitrates are more likely to be privately owned and/or shallow, and affected by human activity. If human or animal waste contaminates a well, nitrites will be detected first but will quickly convert to nitrates.